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    Flag Counter

    Literatur_Sokolski_Opening - compiled by Peter Markus Steiner (in German)


  • Helmut KOERNER
    of Germany



    Flag and map source: https://www.cia.gov/library/publications/the-world-factbook/

      
      
      (2024-06-01)
      (All annotations below by Fritz)
      (Games' source: Marek's 1.b4 database, lichess.org)
      
      
      
      
      
      [Event "2rd Berlin Germany, Lichtenberger Somme"]
      [Site "?"]
      [Date "2013.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Gelman, Josef"]
      [Result "0-1"]
      [WhiteElo "1910"]
      [PlyCount "134"]
      [EventDate "2013.??.??"]
      
      1. b4 a5 2. b5 d6 3. Bb2 Nf6 4. e3 Bf5 $146 (4... Nbd7 5. Nf3 g6 (5... e5 6.
      Be2 Be7 7. O-O O-O 8. d4 e4 9. Nfd2 d5 10. c4 dxc4 11. Nxc4 Nd5 12. Nbd2 f5 13.
      Rc1 a4 14. a3 N7f6 15. Qc2 Be6 16. f3 exf3 17. Rxf3 Qe8 18. Bd3 g6 19. Ne5 Bd6
      20. Rcf1 {Rosner,D (2175)-Valverde,M (2055)/CiF 2006/1/2-1/2 (41)}) 6. Be2 (6.
      c4 Bg7 7. d4 O-O 8. Nbd2 Re8 9. Be2 c6 10. O-O Qc7 11. Rc1 c5 12. e4 e5 13.
      dxe5 dxe5 14. Qc2 Nb6 15. Rfd1 Be6 16. h3 Nh5 17. Bf1 Nf4 18. a4 Rad8 19. Ng5
      Bc8 20. g3 Ne6 {ognos-fantoci/kurnik 2014/1-0 (41)}) 6... Bg7 7. d4 O-O 8. O-O
      e5 9. c4 Re8 10. Nc3 exd4 11. exd4 Ne4 12. Nxe4 Rxe4 13. Bd3 Re8 14. Qc2 Nf6
      15. Rfe1 Rxe1+ 16. Rxe1 Bg4 17. Nd2 Qf8 18. Nf1 Re8 19. Rxe8 {
      Nokka,R-Koskinen,H/Jyvaskyla 1987/1/2-1/2 (34)}) (4... c5 5. Nf3 e5 6. d3 Be7
      7. c4 O-O 8. Nc3 b6 9. Be2 Bb7 10. O-O Nbd7 11. Qc2 Qc7 12. Nh4 d5 13. Nf5 Rae8
      14. e4 d4 15. Na4 Bd8 16. Bc1 Re6 17. Bd2 Rfe8 18. a3 Nf8 19. f4 {
      Vassen,J-Wall,B/Carel CF-01 Correspondence 2005/1-0 (59)}) (4... e5 5. Nf3 $11)
      5. d4 (5. Bxf6 exf6 6. d4 d5 $11) 5... Nbd7 6. Nf3 e6 7. Bd3 Bxd3 8. Qxd3 g6 (
      8... Be7 9. O-O $11) 9. e4 Bg7 10. O-O O-O 11. c4 Nb6 (11... c5 12. bxc6 bxc6
      13. Nc3 $14) 12. a4 (12. Nbd2 Re8 $14) 12... Nfd7 13. Nbd2 e5 14. dxe5 Nxe5 15.
      Qc2 (15. Nxe5 Bxe5 16. Bxe5 dxe5 $14) 15... Qe7 (15... Nxf3+ $142 16. Nxf3 Bxb2
      17. Qxb2 Nxc4 $11) 16. Rac1 (16. Nxe5 $142 Bxe5 17. Bxe5 Qxe5 18. Nb3 $14)
      16... Nxf3+ $17 17. gxf3 (17. Nxf3 $5 Bxb2 18. Qxb2 Qxe4 19. Qb3 $17) 17...
      Bxb2 $19 18. Qxb2 Nxa4 19. Qc2 (19. Qd4 Nc5 $19) 19... Nc5 20. Kh1 Qf6 (20...
      f5 21. Ra1 $19) 21. Ra1 b6 (21... a4 22. Ra3 $19) 22. Ra3 Rfe8 (22... Qf4 23.
      Re1 $19) 23. Rg1 $17 Re5 (23... Qd4 24. Nf1 $17) 24. Nf1 Rg5 (24... a4 25. Rg3
      $17) 25. Rxg5 Qxg5 26. Ne3 Ne6 27. Nd5 Nf4 28. Nxf4 Qxf4 29. Qd1 (29. Qd3 Qc1+
      30. Kg2 Re8 $19) 29... Re8 $19 30. Re3 Re5 31. Qf1 Rh5 32. Qg2 (32. Qg1 Rc5 33.
      Qf1 Qe5 $19) 32... Qe5 33. Qg1 (33. Rd3 Qb2 34. Qf1 Rc5 $19) 33... Kg7 (33...
      Qd4 34. Qf1 $19) 34. Re1 (34. Ra3 f5 $19) 34... Qf4 (34... Qc3 $5 35. Qf1 $19)
      35. Re3 h6 (35... Rc5 36. Qc1 $19) 36. Qg2 Rc5 37. Qf1 Qe5 38. Re1 (38. Qc1 Qd4
      $19) 38... Qc3 39. Rc1 (39. h3 Qxc4 40. Qxc4 Rxc4 $19) 39... Qxf3+ 40. Qg2
      Qxg2+ (40... Qd3 $5 41. f3 $19) 41. Kxg2 Kf6 42. f4 (42. Kf3 Rh5 $19) 42... Ke6
      43. Kf3 (43. h4 f5 44. exf5+ Kxf5 $19) 43... f5 44. h4 (44. Ke3 fxe4 45. Kd4 c6
      46. bxc6 b5 $19) 44... a4 (44... fxe4+ $5 45. Ke3 $19) 45. Ke3 fxe4 46. Kxe4 (
      46. Kd4 c6 47. Rg1 cxb5 48. Rxg6+ Kf5 49. Rxd6 Rxc4+ 50. Ke3 Rc3+ 51. Ke2 a3
      52. Rxb6 a2 53. Rxb5+ Kxf4 $19) 46... Rh5 (46... Rxc4+ 47. Rxc4 d5+ 48. Kd4
      dxc4 49. Kxc4 $19) 47. Rh1 (47. Rg1 Kf6 (47... Rxh4 $6 48. Rxg6+ Kf7 49. Rg3
      $17) 48. Ra1 Rxh4 49. Rxa4 g5 $19) 47... Kf6 (47... g5 $142 $5 48. f5+ Kd7 49.
      Ra1 Rxh4+ 50. Kd5 $19) 48. Rh3 Rc5 49. Kd4 Kf5 (49... d5 $142 50. cxd5 Rxb5 51.
      Rh1 $19) 50. Rg3 $2 (50. h5 d5 51. hxg6 Rxc4+ 52. Kxd5 Rc5+ 53. Kd4 Kxg6 $19)
      50... a3 (50... d5 $142 51. cxd5 Rxb5 52. Kc4 $19) 51. Rxa3 Kxf4 52. Ra8 g5 53.
      hxg5 hxg5 54. Rf8+ Kg4 (54... Kg3 55. Ra8 $19) 55. Rf7 (55. Re8 Kg3 $19) 55...
      Kg3 56. Rg7 g4 57. Kd3 (57. Rf7 Kg2 $19) 57... Kf3 58. Rf7+ Kg2 59. Rg7 (59.
      Kd4 g3 60. Rh7 Kf3 $19) 59... g3 60. Kd4 Kf2 61. Rf7+ Kg1 62. Rg7 (62. Rh7 Rg5
      63. Rxc7 g2 $19) 62... g2 63. Kd3 Kh2 64. Rh7+ Kg1 (64... Kg3 $5 65. Rg7+ Kf3
      66. Rg8 $19) 65. Rg7 Rh5 66. Ke2 (66. Rxc7 Kh2 67. Rg7 d5 $19) 66... Kh2 67.
      Kf2 Rf5+ (67... Rf5+ 68. Ke3 g1=Q+ 69. Rxg1 Kxg1 $19) 0-1
      
      [Event "corr SOK-87-08"]
      [Site "?"]
      [Date "1987.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Diener, Rudolf"]
      [Result "1-0"]
      [PlyCount "67"]
      [EventDate "1987.??.??"]
      
      1. b4 c6 2. c4 Qb6 3. Qb3 a5 4. b5 a4 5. Qc3 (5. Qc2 Nf6 $11) 5... Nf6 6. e3 e6
      (6... d6 7. d4 $11) 7. d4 Ne4 (7... d6 8. Nf3 $11) 8. Qc2 Bb4+ 9. Bd2 Nxd2 10.
      Nxd2 cxb5 (10... d6 11. Bd3 $11) 11. cxb5 $14 O-O 12. Ngf3 (12. Bd3 f5 $11)
      12... d5 13. Bd3 g6 (13... h6 14. Rc1 $11) 14. O-O (14. a3 Bd6 $11) 14... Bd7
      15. Rab1 Rc8 16. Qd1 Bd6 17. h4 (17. Qe2 Rc3 $11) 17... Rc3 18. Be2 (18. Qe2 f6
      $11) 18... Ra5 {b5 seems the pivot of the position} (18... Qa5 19. Ne5 $15) 19.
      h5 (19. e4 f6 $11) 19... Qc7 (19... gxh5 20. Ne5 $15) 20. hxg6 (20. e4 Rc2 21.
      Rc1 Rxc1 22. Qxc1 Qb6 $11) 20... hxg6 21. e4 Ba3 (21... Rc2 22. e5 Ba3 23. Ra1
      $15) 22. Ne5 Be8 (22... Bd6 23. b6 Qc8 24. Re1 $11) 23. exd5 $14 exd5 24. f4 (
      24. Re1 Nd7 $14) 24... Rc2 25. Bd3 {White prepares the advance f5} (25. Nc6
      $142 $1 Rxa2 26. Nxa5 Qxa5 27. Nf3 $14) 25... Rxa2 $17 26. f5 (26. Ndf3 Qc3 $17
      ) 26... Bb2 (26... Qb6 27. Ndf3 $17) 27. Qg4 Bxd4+ $4 (27... Nd7 28. fxg6 f5
      29. Rxf5 Ra1 $16) 28. Qxd4 $16 Rxd2 29. fxg6 fxg6 30. Qxd5+ Kg7 31. Qd4 Kg8 32.
      Bc4+ Kh7 (32... Kg7 33. Nd3+ Kh6 34. Rf8 Rxg2+ 35. Kxg2 Bc6+ 36. Kf1 Rxb5 37.
      Rh8+ Qh7 38. Qf4+ Rg5 39. Qf8+ Kh5 40. Rxh7+ Kg4 41. Qf4#) 33. Qxd2 (33. Qh4+
      $142 Kg7 34. Qf6+ Kh7 $18) 33... Qc5+ (33... Qxe5 34. Qxa5 Qd4+ 35. Rf2 Qxc4
      $18) 34. Rf2 (34. Rf2 Qxe5 35. Re1 Rxb5 36. Bxb5 $18) 1-0
      
      [Event "Berlin"]
      [Site "?"]
      [Date "2006.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Boettcher, Patrick"]
      [Result "1/2-1/2"]
      [WhiteElo "1975"]
      [BlackElo "2160"]
      [PlyCount "54"]
      [EventDate "2006.??.??"]
      
      1. b4 c6 2. e3 a5 3. b5 d5 4. Bb2 Nf6 5. c4 Bf5 6. Nf3 e6 7. Nc3 Nbd7 (7... Bd6
      8. d4 $11) 8. bxc6 (8. Rc1 Rc8 $11) 8... bxc6 9. Nd4 Bg6 10. cxd5 cxd5 11. Bb5
      Bd6 12. Qe2 (12. O-O O-O $11) 12... O-O 13. O-O (13. Rc1 Rc8 $11) 13... Ne4 (
      13... e5 14. Nc6 Qc7 15. Rac1 $11) 14. Nxe4 (14. f4 Nef6 $11) 14... dxe4 15.
      Rfc1 (15. f4 exf3 16. Nxf3 Rb8 $11) 15... Ne5 (15... Nc5 16. Rab1 $11) 16. Nc6
      Nf3+ (16... Nxc6 17. Bxc6 Rc8 18. Qc4 $11) 17. Qxf3 (17. gxf3 Qg5+ 18. Kh1 exf3
      19. Qf1 $11) 17... exf3 $11 18. Nxd8 Rfxd8 19. a4 (19. Bc6 Rab8 20. Bc3 Ba3 $15
      ) 19... fxg2 20. Kxg2 Bb4 (20... e5 21. d4 exd4 22. Bxd4 $11) 21. d4 Rac8 22.
      Rxc8 Rxc8 23. Rc1 Rc2 24. Rxc2 Bxc2 25. f3 Kf8 26. Kf2 Ke7 27. d5 (27. e4 g5
      $11) 27... g5 1/2-1/2
      
      [Event "Berliner Sommer"]
      [Site "?"]
      [Date "1994.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Hafner, Christian"]
      [Result "0-1"]
      [PlyCount "50"]
      [EventDate "1994.??.??"]
      
      1. b4 c6 2. Bb2 a5 3. bxa5 Qxa5 4. e3 Nf6 5. Nf3 d6 6. Be2 e5 7. O-O Be7 8. d3
      O-O 9. c4 e4 10. Nd4 {'N'} (10. Nfd2 exd3 11. Bxd3 d5 12. Nc3 dxc4 13. Nxc4 Qd8
      14. h3 Nbd7 15. Bc2 Nc5 16. Qxd8 Rxd8 17. Rfd1 Be6 18. Rxd8+ Rxd8 19. Ne5 Rd2
      20. Rc1 Nd5 21. Nf3 Nxc3 22. Nxd2 Ne2+ 23. Kf1 Nxc1 24. Bxc1 Bxa2 {
      Chirica,B-Enache,V (2130)/Centrocoop June op-A 1999 (42)}) 10... Nbd7 (10...
      exd3 11. Bxd3 (11. Qxd3 Na6 (11... Qb6 12. Qb3 (12. Qc2 Na6 13. Nc3 Bd7 14.
      Rfd1 Qa5 15. h3 g6 16. Rab1) (12. Qd2 Na6 13. Nc3 Nc5 14. Rab1 Bd7 15. Qc2 g6
      16. h3) 12... Nbd7 13. Nc3 Qa5 14. h3 Nc5 15. Qc2 Bd7 16. Rab1) (11... Qc7 12.
      h3 (12. Nc3 Nbd7 13. Qc2 Nc5 14. h3 Bd7 15. Bf3 g6 16. a4) (12. Qc2 Nbd7 13.
      Nc3 Nc5 14. h3 Bd7 15. Bf3 g6 16. a4) 12... Nbd7 13. Nc3 Nc5 14. Qc2 Bd7 15.
      Bf3 h6 16. Nce2) (11... Qd8 12. Qc2 (12. Nc3 Na6 13. h3 Bd7 14. Bf3 Nc5 15. Qc2
      Qb6 16. a4) (12. h3 Nbd7 13. Qc2 Nc5 14. Nc3 Bd7 15. Rab1 Qc7 16. e4) 12... Na6
      13. Nc3 Nc5 14. h3 Bd7 15. Rab1 Qc7 16. e4) 12. Nc3 (12. Nd2 Nc5 13. Qc2 Na4
      14. Rab1 Bd7 15. Bf3 g6 16. Ne4) (12. Qc3 Qxc3 13. Nxc3 Nc5 14. a4 Bd7 15. Rfb1
      Rfb8 16. Ra2) 12... Bd7 13. Qc2 Nc5 14. Bc1 Rfe8 15. Rb1 Qc7 16. h3) 11... Nbd7
      (11... Na6 12. Nc3 (12. Be2 Qg5 13. f4 Qh4 14. Nc3 Nc5 15. f5 Nfe4 16. Rf4) (
      12. Nd2 Nc5 13. N2b3 Qb4 14. a4 Nxa4 15. Ba3 Qb6 16. Qc2) 12... Nc5 13. Be2 Re8
      14. Qc2 Bg4 15. Nb3 Qc7 16. Rfd1) (11... Qc7 12. h3 (12. Nc3 Nbd7 13. h3 Nc5
      14. Be2 Bd7 15. Qc2 h6 16. Bf3) (12. f3 Nbd7 13. Nc3 Rd8 14. Qc2 Nc5 15. Be2
      Bd7 16. a4) 12... Nbd7 13. Nc3 Nc5 14. Be2 Bd7 15. Qc2 Ra6 16. a4) (11... Qd8
      12. Nc3 (12. h3 Nbd7 13. Be2 h6 14. Nc3 Nc5 15. Qc2 Bd7 16. Rfd1) (12. Be2 Nbd7
      13. Nc3 Qc7 14. h3 Nc5 15. Qc2 Bd7 16. a4) 12... Nbd7 13. h3 Nc5 14. Be2 Bd7
      15. Qc2 Qc7 16. a4) 12. Nc3 (12. Be2 Nc5 13. Nc3 Re8 14. Qc2 Bg4 15. Nf5 Bxf5
      16. Qxf5) (12. Nf5 Qd8 13. Nd2 Ne5 14. Qc2 g6 15. Nxe7+ Qxe7 16. Be2) 12... Nc5
      13. Be2 Ra6 14. Qc2 Rb6 15. Rab1 h6 16. Nb3) (10... Na6 11. dxe4 (11. Nd2 exd3
      12. Bxd3 Qc7 13. N2b3 Rd8 14. e4 Nc5 15. f3 h5 16. Re1) (11. Nc3 exd3 12. Qxd3
      (12. Bxd3 Nc5 13. Bc2 Ng4 14. Qe2 Ne5 15. Ne4 Nxe4 16. Bxe4) 12... Nc5 13. Qc2
      g6 14. h3 Bd7 15. Bf3 Rfe8 16. a4) 11... Nxe4 12. Qc2 (12. f3 Nf6 13. Nd2 Nc5
      14. N2b3 Qb4 15. Qc2 Na4 16. Bc1) 12... f5 13. f3 Nec5 14. Nc3 Bd7 15. a3 Bf6
      16. Rad1) 11. Nd2 (11. dxe4 Nxe4 (11... Nc5 12. Bc3 (12. Nc3 Nfxe4 13. Nxe4
      Nxe4 14. Qc2 f5 15. Bd3 Qa4 16. Rfd1) (12. Nd2 Nfxe4 13. Nxe4 Nxe4 14. Qc2 f5
      15. f3 Nc5 16. Nb3) 12... Qa4 13. f3 Qxd1 14. Rxd1 Bd7 15. Be1 Bd8 16. Nd2) 12.
      Qc2 (12. f3 Nef6 13. Nd2 Nc5 14. N2b3 Qb4 15. Qc2 Na4 16. Bc1) (12. Qc1 Qg5 13.
      Nc3 Ndc5 14. Nxe4 Nxe4 15. Qc2 Nc5 16. a4) 12... Ndc5 13. Nc3 Nf6 14. h3 g6 15.
      Rab1 Ne6 16. Ne4) (11. Nc3 exd3 (11... Nc5 12. Nxe4 (12. dxe4 Nfxe4 13. Nxe4
      Nxe4 14. Qc2 f5 15. Nb3 Qa4 16. f3) (12. Nb3 Qb4 13. d4 Na4 14. a3 Nxb2 15.
      axb4 Nxd1 16. Rfxd1) 12... Nfxe4 13. dxe4 Nxe4 14. Qc2 f5 15. Nb3 Qa4 16. f3)
      12. Qxd3 (12. Bxd3 Nc5 13. Be2 Ra6 14. Qc2 Rb6 15. Rab1 Bd7 16. Nb3) 12... Ne5
      13. Qc2 Qc5 14. a4 Bg4 15. Ba3 Qa5 16. f4) 11... exd3 12. Bxd3 Ne5 13. N2b3 (
      13. Nf5 Re8 14. Nb3 Qc7 15. Nxe7+ Qxe7 16. Qc2) 13... Qc7 (13... Qa6 14. a4
      Nxd3 15. Qxd3 d5 16. Nd2) 14. Qe2 (14. Be2 Bg4 15. f3 Bd7 16. e4) 14... Re8 (
      14... d5 15. cxd5 Nxd3 16. Qxd3) 15. Rfd1 (15. h3 d5 16. Rfd1) 15... d5 (15...
      Ra4 16. Nd2) 16. cxd5 Nxd5 17. Nf5 (17. Bf5 Bf8 $15) 17... Bf6 {'-/+'} 18. Nbd4
      (18. Rd2 g6 19. Ng3 Bg4 $15) 18... g6 19. Ng3 Bg4 20. Nf3 {'?'} (20. f3 $142 $5
      Nxd3 21. Qxd3 Rxe3 22. Qd2 $17) 20... Nf4 {'-+!'} 21. Qc2 $146 Bxf3 (21...
      Nexd3 $6 22. Bxf6 Nd5 23. Bd4 Bxf3 24. gxf3 $11) (21... Nfxd3 $6 22. Rxd3 Bxf3
      23. gxf3 $19) 22. gxf3 Nxf3+ (22... Nexd3 $6 23. Bxf6 Nd5 24. Bd4 $11) (22...
      Nfxd3 $6 23. Rxd3 Nxf3+ 24. Kh1 Bxb2 25. Qxb2 $19) 23. Kh1 Bxb2 24. Qxb2 Nxd3
      25. Rxd3 {'-+'} Ne5 $19 0-1
      
      [Event "Lichtenberger Sommer"]
      [Site "?"]
      [Date "2015.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Khorolskyi, Borys"]
      [Result "1-0"]
      [WhiteElo "1860"]
      [BlackElo "1935"]
      [PlyCount "65"]
      [EventDate "2015.??.??"]
      
      1. b4 c6 2. e3 Nf6 3. Bb2 d5 4. Nf3 Bg4 5. Be2 e6 6. a3 Nbd7 7. Nd4 (7. c4 Bd6
      8. d3 O-O 9. h3 Bxf3 10. Bxf3 Qe7 11. Nd2 e5 12. Rc1 e4 13. dxe4 Be5 14. Bxe5
      Nxe5 15. Qc2 dxc4 16. Nxc4 Nxc4 17. Qxc4 Rfe8 18. Rd1 a5 19. O-O axb4 20. axb4
      Nxe4 21. Rd4 Nf6 {
      Dominguez,J (2365)-Alonso,S (2440)/Pan-American Teams, Mendes BRA 2009/1-0 (32}
      ) 7... Bxe2 8. Qxe2 Be7 $146 (8... Bd6 9. O-O O-O (9... e5 10. Nf3 Rc8 11. d3
      Bb8 12. Nbd2 Qc7 13. g3 O-O 14. c4 Rfe8 15. Rac1 Qd6 16. c5 Qc7 17. Nh4 e4 18.
      dxe4 Nxe4 19. Nxe4 Rxe4 20. Nf5 f6 21. Nd6 Rce8 22. Nxe4 Rxe4 23. Qh5 Ne5 24.
      Qe8# {mate sunnyda-nyelo/kurnik 2013/1-0}) 10. d3 Qc7 11. h3 Rfe8 {
      1/2-1/2 Barczay,L-Navarovszky/ch H 1980}) (8... g6 9. b5 c5 10. Nf3 {
      1-0 sunnyda-tekly/kurnik 2012}) 9. O-O a5 10. b5 c5 11. Nf3 O-O 12. a4 c4 13.
      d4 cxd3 14. cxd3 Rc8 15. Nc3 Bb4 16. Na2 Be7 17. Rfc1 Qb6 18. d4 Ne4 19. Rc2
      Rc7 20. Rxc7 Qxc7 21. Rc1 Qb6 22. Nd2 Nd6 23. Qd1 Rc8 24. Rxc8+ Nxc8 25. Qc2
      Qd8 26. Qc3 Na7 27. f3 Bd6 28. e4 Qb6 (28... Nb6 $142 $5 29. Qxa5 Bxh2+ 30.
      Kxh2 Qh4+ 31. Kg1 Qe1+ 32. Kh2 Qh4+ 33. Kg1 Qe1+ 34. Kh2 Qh4+ $11) 29. Nb3 $16
      dxe4 30. Qxa5 exf3 31. gxf3 h6 32. Nc3 Qxd4+ $4 (32... Bf4 $142 $11) 33. Nxd4
      $18 (33. Nxd4 Nxb5 34. Ncxb5 $18) 1-0
      
      [Event "Berliner Sommer"]
      [Site "?"]
      [Date "1998.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Jaehnisch, Frank"]
      [Result "0-1"]
      [WhiteElo "2060"]
      [BlackElo "2275"]
      [PlyCount "62"]
      [EventDate "1998.??.??"]
      
      1. b4 c6 2. e3 d5 3. Bb2 Nf6 4. Nf3 Bg4 5. Be2 e6 6. a3 Bd6 7. Nd4 Bxe2 8. Qxe2
      Qc7 9. c4 dxc4 10. Qxc4 Nbd7 (10... Bxh2 $2 11. Nxe6 fxe6 12. Qxe6+ Kf8 13.
      Bxf6 $18) 11. Nf3 Ne5 (11... e5 12. d3 $11) 12. Nxe5 Bxe5 13. Nc3 (13. Bxe5
      Qxe5 14. Nc3 Qd6 $11) 13... O-O (13... Bxh2 14. g3 Bxg3 15. fxg3 Qxg3+ 16. Kd1
      $11) 14. f4 $11 Bd6 15. O-O b5 16. Qe2 (16. Qd4 e5 17. fxe5 Bxe5 $11) 16... a5
      $15 17. Qf3 (17. Rac1 Qd7 (17... axb4 $143 18. Nxb5 Qd7 19. Nxd6 Qxd6 20. Bxf6
      gxf6 21. axb4 $16) 18. Nb1 axb4 19. Bxf6 gxf6 20. axb4 f5 $15) 17... axb4 $17
      18. axb4 Rxa1 (18... Bxb4 $6 19. Nxb5 Qd7 20. Rxa8 Rxa8 21. Bxf6 gxf6 22. Nc3
      $11) 19. Rxa1 Bxb4 20. Ne4 (20. Qg3 Qd8 21. Ne4 Nh5 $15) 20... Nxe4 21. Qxe4
      Be7 (21... c5 22. Be5 Qe7 23. d3 $17) 22. Bd4 (22. Qf3 Qd7 23. d4 c5 $17) 22...
      c5 23. Bb2 Rd8 24. Be5 (24. Qc2 Qd6 25. d4 c4 $19) 24... Qb6 {Black plans b4} (
      24... Qd7 25. Rd1 $19) 25. Qc2 b4 26. Rb1 (26. h3 $5 $19) 26... Qb5 27. Kf2 Qd7
      (27... Bh4+ 28. g3 Be7 29. Ra1 $19) 28. Rd1 f6 29. Ba1 (29. Bb2 Qd5 $19) 29...
      Qd5 30. g4 (30. d4 c4 $19) 30... c4 31. Bd4 (31. Bb2 b3 32. Qc3 Qb5 $19) 31...
      e5 (31... e5 32. Bb6 Rc8 $19) 0-1
      
      [Event "Berlin Lichtenberger op 8th"]
      [Site "?"]
      [Date "2009.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Penne, Bo"]
      [Result "1/2-1/2"]
      [WhiteElo "1945"]
      [BlackElo "2000"]
      [PlyCount "41"]
      [EventDate "2009.??.??"]
      
      1. b4 d5 2. Bb2 Nf6 3. e3 c6 4. Nf3 Bg4 5. c4 dxc4 (5... Bxf3 6. Qxf3 e6 7. a3
      a5 8. b5 cxb5 9. cxb5 b6 10. Be2 Nbd7 11. O-O Bd6 12. d4 Ne4 13. Rd1 O-O 14.
      Nd2 f5 15. g3 Qg5 16. Rac1 Rac8 17. Qh5 Qxh5 18. Bxh5 g6 19. Bf3 Nxd2 20. Rxd2
      {barborski-gran1 (1645)/playok.com 2013/0-1 (38)}) 6. Bxc4 e6 7. a3 Nbd7 $146 (
      7... Be7 8. O-O O-O 9. Be2 Bxf3 10. Bxf3 Nbd7 11. Nc3 Nb6 12. Be2 Nbd5 13. d4
      Nxc3 14. Bxc3 Bd6 15. Qc2 Nd5 16. b5 Nxc3 17. Qxc3 cxb5 18. Bxb5 Rc8 19. Qd3
      Bb8 20. Ba4 b6 21. Bc2 g6 22. g3 {
      orangutanb4 (1920)-radecek9 (1745)/kurnik 2011/1-0 (59)}) (7... a5 8. bxa5 Qxa5
      9. O-O Nbd7 10. h3 Bh5 11. d4 Bd6 12. Nbd2 Rd8 13. Qc2 Bg6 14. e4 Bb8 15. Bd3
      O-O 16. Bc3 Qc7 17. Bb4 Rfe8 18. Nc4 {1-0 karoo54-80ol/kurnik 2012}) 8. d4 a5
      9. b5 Qb6 10. Nc3 cxb5 (10... Bd6 11. h3 Bh5 12. bxc6 bxc6 13. Rb1 $14) 11.
      Bxb5 Be7 (11... Bd6 12. h3 Bxf3 13. Qxf3 $16) 12. Qe2 (12. h3 $5 Bxf3 13. Qxf3
      $16 (13. gxf3 $143 O-O $14)) 12... O-O $14 13. O-O e5 14. Na4 Qd6 (14... Bxf3
      $5 15. gxf3 Qe6 $11) 15. dxe5 $16 Bxf3 16. Qxf3 Nxe5 17. Qg3 (17. Qxb7 $4 Rfb8
      18. Rad1 Qe6 $19) 17... Ng6 (17... Nc6 $5 $16) 18. Qxd6 $18 Bxd6 19. Bxf6 gxf6
      20. Rfd1 (20. Nb6 Ra7 $18) 20... Be5 (20... Rad8 21. Nb6 Ne5 22. Nd7 Nxd7 23.
      Rxd6 $16) 21. Rab1 1/2-1/2
      
      [Event "Lichtenberger Sommer"]
      [Site "?"]
      [Date "2015.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Roth, Josef"]
      [Result "0-1"]
      [WhiteElo "1860"]
      [BlackElo "2100"]
      [PlyCount "82"]
      [EventDate "2015.??.??"]
      
      1. b4 d5 2. Bb2 Qd6 3. a3 e5 4. Nf3 f6 5. e3 Bg4 6. Be2 Nd7 7. d4 e4 8. Nfd2
      Bxe2 9. Qxe2 f5 (9... c6 10. c4 Nh6 11. Nc3 Nf7 12. h4 Be7 13. Rc1 a6 14. O-O
      f5 15. f3 Nf6 16. fxe4 fxe4 17. Rf5 O-O 18. Rcf1 Rad8 19. Nd1 g6 20. R5f2 Nh6
      21. g4 Nfxg4 22. Rg2 Rxf1+ 23. Nxf1 Qe6 24. Nf2 {
      lenda77 (1710)-adamk112 (1905)/kurnik 2014/1-0 (52)}) 10. c4 c6 11. Nc3 Ngf6
      12. cxd5 $146 (12. Rc1 Nb6 13. c5 {1-0 Tilp,A-Gremin,W/corr DDR 1988}) 12...
      cxd5 13. Rc1 a6 14. f4 Be7 15. b5 O-O 16. a4 Rfc8 17. O-O Nb6 18. Ra1 Qe6 19.
      a5 Nc4 20. Nxc4 Rxc4 21. bxa6 bxa6 22. Na4 Rac8 23. Nc5 (23. Nb6 $142 $5 Rc2
      24. Qxa6 $11) 23... Bxc5 $17 24. dxc5 R4xc5 25. Bd4 Rc2 26. Qe1 Qc6 27. h3 Nd7
      28. Kh1 Qg6 29. Rf2 R2c4 30. Qd1 Nc5 31. Bxc5 R8xc5 32. Rd2 Qc6 33. Qe2 h6 34.
      Kh2 Qc7 35. Qh5 d4 (35... Rxa5 $6 36. Rxa5 Qxa5 37. Rb2 $11) 36. exd4 $4 (36.
      Qg6 $142 $17) 36... Qxf4+ $19 37. Kh1 Qxd2 38. Qe8+ (38. dxc5 Rxc5 39. h4 $19)
      38... Kh7 39. dxc5 Rc1+ 40. Rxc1 Qxc1+ 41. Kh2 Qxc5 (41... Qxc5 42. h4 Qxa5 $19
      ) 0-1
      
      [Event "Lichtenrader Autumn"]
      [Site "?"]
      [Date "2005.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Poppner, Dietmar"]
      [Result "1/2-1/2"]
      [WhiteElo "1945"]
      [BlackElo "2160"]
      [PlyCount "119"]
      [EventDate "2005.??.??"]
      
      1. b4 d5 2. Bb2 Qd6 3. a3 $11 e5 4. e3 Be6 5. Nf3 f6 6. d4 e4 7. Nfd2 c6 8. c4
      Nd7 9. Nc3 f5 10. cxd5 Bxd5 11. Nc4 Qe6 12. Nxd5 cxd5 13. Na5 (13. Ne5 a6 $14)
      13... b6 $11 14. Nb3 Bd6 (14... Ngf6 15. Ba6 $11) 15. Rc1 (15. Ba6 Ngf6 $11)
      15... Ne7 (15... Ngf6 16. Qd2 $11) 16. g3 (16. Qh5+ Ng6 $11) 16... O-O (16...
      a6 17. Bg2 $11) 17. Ba6 Rad8 18. Qd2 Nb8 (18... Ng6 19. h3 $11) 19. Be2 Rc8 20.
      O-O Rxc1 (20... Nd7 21. Rxc8 Rxc8 22. b5 $11) 21. Rxc1 g5 (21... Nd7 22. Rc2
      $11) 22. f4 $14 gxf4 (22... exf3 23. Bxf3 f4 24. gxf4 gxf4 25. Re1 $14) 23.
      gxf4 (23. exf4 a6 $14) 23... Rf7 $11 24. Kh1 Rg7 25. Rg1 Rxg1+ 26. Kxg1 Qg6+
      27. Kh1 Nd7 28. Qe1 (28. Bb5 Nf6 $11) 28... Nf6 (28... Kf7 29. Qd1 Nf6 30. Nd2
      $11) 29. Bc1 (29. h3 Nc6 $11) 29... Kf8 30. b5 (30. Bb5 Qh5 31. Nd2 Kg7 $11)
      30... Qh6 (30... Ke8 31. Bb2 $11) 31. a4 (31. Qg3 Ke8 $11) 31... Ng6 (31... Qh3
      32. Bf1 Qf3+ 33. Bg2 $11) 32. Na1 (32. a5 Ke8 $11) 32... Ng4 (32... Ke8 33. Nc2
      $11) 33. Qg1 (33. Qg3 Qh4 $11) 33... Qh4 34. Bxg4 (34. Bd2 $5 $11) 34... fxg4
      $15 35. Qg3 Qxg3 (35... Ke7 36. Nc2 $11) 36. hxg3 Ne7 (36... h5 37. Kg2 $15)
      37. Nc2 Nf5 38. Kg2 Ke8 39. Bd2 Kd7 (39... Kf7 40. Bb4 $15) 40. Kf2 (40. Bb4
      Bxb4 41. Nxb4 Nxe3+ 42. Kf2 Nd1+ 43. Ke2 Nc3+ 44. Kd2 Nb1+ 45. Kc2 Na3+ 46. Kb3
      Nc4 47. Nxd5 e3 $11) 40... h5 41. Be1 (41. Bb4 Bc7 $11) 41... Be7 42. Ke2 Kc8
      43. Kf1 Kb7 (43... Kd8 44. Kf2 $15) 44. Kf2 (44. Kg2 Kc7 $15) 44... a5 (44...
      h4 45. gxh4 Bxh4+ 46. Ke2 Bxe1 47. Kxe1 $15) 45. bxa6+ Kxa6 46. Bb4 b5 47.
      axb5+ Kxb5 48. Bxe7 Nxe7 49. Ne1 (49. Na3+ Kc6 $15) 49... Kc6 (49... Nf5 50.
      Ng2 $15) 50. Ng2 (50. Nc2 Nf5 $15) 50... Kd6 (50... Nf5 51. Ke1 $15) 51. Nh4 (
      51. Ne1 Ke6 $15) 51... Ke6 52. Ke2 Kf6 53. Kf2 Nc6 (53... Kf7 54. Ke2 $15) 54.
      Ng2 Nb4 55. Ke2 Nd3 (55... Nc2 56. Kd2 Na3 57. Ke2 $15) 56. Nh4 (56. Ne1 Nc1+
      57. Kd1 Na2 $11) 56... Nb2 $15 57. Ng2 Nc4 58. Nh4 Nd6 59. Kf2 Nc4 (59... Kg7
      60. f5 $15) 60. Ke2 $11 1/2-1/2
      
      [Event "10th Lichtenberger Sommer"]
      [Site "?"]
      [Date "2011.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Weber, Dirk"]
      [Result "0-1"]
      [WhiteElo "1930"]
      [BlackElo "2270"]
      [PlyCount "88"]
      [EventDate "2011.??.??"]
      
      1. b4 c6 2. e3 d5 3. Bb2 Bf5 4. Nf3 Nf6 5. c4 dxc4 6. Bxc4 e6 7. Qb3 b5 8. Be2
      a5 $146 9. bxa5 Qxa5 (9... Nbd7 10. Nd4 Be4 11. f3 $11) 10. O-O Be7 (10... Nbd7
      11. Bxf6 gxf6 12. Nd4 $14) 11. d4 (11. Nd4 Be4 12. Nc3 Bg6 $11) 11... O-O $11
      12. Rc1 Bxb1 (12... Rd8 13. Ne5 $11) 13. Raxb1 (13. Rcxb1 Nd5 $14) 13... Qxa2
      $11 14. Qxa2 (14. Qc2 Qd5 $11) 14... Rxa2 $15 15. Kf1 (15. Ne5 Ne4 16. Rc2 b4
      $15) 15... Nd5 (15... Rd8 16. Bd1 $17) 16. Ne5 $15 {
      Attacking the backward pawn on c6} Rxb2 17. Rxb2 Ba3 18. Rbc2 Bxc1 19. Rxc1 Ne7
      20. Ra1 f6 21. Nd3 Nd7 (21... Kf7 22. Bf3 $11) 22. Ra7 Rd8 23. Bf3 Kf8 24. Nb4
      (24. Rc7 e5 $11) 24... Nb8 25. Rc7 {Increases the pressure on the backward pawn
      } e5 26. dxe5 fxe5 27. Ke2 (27. Bxc6 $2 Rd1+ (27... Nbxc6 $6 28. Nxc6 Nxc6 29.
      Rxc6 $15) 28. Ke2 Rb1 (28... Nbxc6 29. Nxc6 Rc1 30. Rxe7 Rxc6 31. Rxe5 $16) (
      28... Nexc6 $2 29. Nxc6 Nxc6 30. Kxd1 $18 (30. Rxc6 $6 Rg1 $14)) 29. Bxb5 Rxb4
      $19) 27... Rd6 28. Nd3 (28. Rb7 Nd7 29. Bxc6 Nxc6 30. Nxc6 Rxc6 31. Rxd7 Rb6
      $11) 28... Rd7 $15 29. Rxd7 Nxd7 30. Bg4 Ke8 (30... Nf6 31. Nxe5 Nxg4 32. Nxg4
      $15) 31. Bxd7+ Kxd7 32. Nxe5+ Kd6 33. f4 (33. Nf7+ Kd5 $11) 33... c5 $15 34.
      Kd3 g6 (34... c4+ 35. Kd4 $15) 35. g4 (35. Nf7+ Kd7 $11) 35... Ke6 (35... Nc6
      36. Nxc6 Kxc6 37. h4 $15) 36. Ke4 (36. Nf3 c4+ 37. Kd4 Kd6 $11) 36... b4 37.
      Nd3 Kd6 38. f5 (38. Ne5 $5 $11) 38... Nd5 $17 39. fxg6 (39. Nb2 Nf6+ 40. Kf4
      gxf5 41. gxf5 Kd5 $17) 39... hxg6 40. Nb2 Nf6+ 41. Kf4 Kd5 42. h4 $2 (42. Nd3
      $142 $19) 42... c4 43. h5 (43. e4+ Kd4 44. Nxc4 Kxc4 $19) 43... c3 44. Nd3 b3
      0-1
      
      [Event "Berlin GER"]
      [Site "?"]
      [Date "2012.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Hesselbarth, Karlheinz"]
      [Result "1-0"]
      [WhiteElo "1935"]
      [BlackElo "1790"]
      [PlyCount "43"]
      [EventDate "2012.??.??"]
      
      1. b4 {A00: Irregular Openings} c6 2. e3 d5 3. Bb2 Nf6 4. c4 Bf5 5. Nf3 Nbd7 6.
      Nc3 (6. d4 g6 7. Nbd2 Bg7 8. Be2 Ne4 9. Nxe4 Bxe4 10. O-O O-O 11. Nd2 Bf5 12.
      f3 Nf6 13. Qb3 Qd6 14. Rae1 Qc7 15. g4 Be6 16. e4 dxc4 17. Bxc4 Bxc4 18. Nxc4
      Qf4 19. Bc1 Qc7 20. Ne5 Nd7 {barborski-hecio01/kurnik 2012/0-1}) 6... e6 7. b5
      $146 (7. Qb3 Be7 8. Be2 O-O 9. O-O Bg6 10. a4 b6 11. Nd4 Qc7 12. cxd5 exd5 13.
      Rac1 a6 14. Nxd5 Nxd5 15. Qxd5 Qxh2+ 16. Kxh2 cxd5 17. Rc7 Bd6+ 18. f4 Bxc7 19.
      Rf3 Nf6 20. Kg1 Bd6 21. d3 Rfe8 {
      Thome,V-Schindler,R/Baden-ch AT Waldshut 1991/0-1 (33)}) (7. c5 b6 8. d4 bxc5
      9. dxc5 Rb8 10. a3 a5 11. Qb3 Nxc5 12. Qd1 axb4 13. axb4 Rxb4 14. Ba3 Rb8 15.
      Bxc5 Bxc5 16. Bd3 Bb4 17. Qc2 Ne4 18. Bxe4 Bxe4 19. Qd2 Qf6 20. O-O Bxc3 21.
      Qc1 O-O {Hoehne,M-Kube,D/Berlin-ch U16 2004/0-1}) 7... Bd6 8. Nh4 Bg6 9. Nxg6
      hxg6 10. a4 Qe7 (10... Bxh2 $143 11. bxc6 bxc6 12. cxd5 cxd5 13. g3 $16) (10...
      Rxh2 $143 11. Rxh2 Bxh2 12. g3 $16) 11. h3 e5 (11... O-O 12. Be2 $11) 12. bxc6
      bxc6 13. cxd5 cxd5 14. Nb5 Bb8 $2 (14... O-O $142 15. Nxd6 Qxd6 $11) 15. Qc2
      Kd8 $2 (15... Nb6 $142 16. a5 Nc4 17. Bxc4 dxc4 18. Qxc4 Qe6 19. Qxe6+ fxe6 $18
      ) 16. Ba3 Qe6 17. Be2 (17. Rc1 Nb6 18. Nc7 Qc8 19. Nxa8 Qxc2 20. Rxc2 Nxa8 $18)
      17... Rh4 $2 (17... Nb6 $142 $16) 18. Rc1 $18 Nb6 (18... Rc4 19. Bxc4 dxc4 20.
      Qxc4 Qxc4 21. Rxc4 Nb6 $18) 19. Nc7 Bxc7 (19... Qd7 20. Nxa8 Nxa8 $18) 20.
      Qxc7+ Ke8 21. Rc6 (21. Bb5+ $142 Nfd7 22. Rc6 Rc4 23. Rxe6+ fxe6 $18) 21... Qd7
      22. Qxe5+ (22. Qxe5+ Kd8 23. Rd6 $18) 1-0
      
      [Event "Lichtenberger Sommer"]
      [Site "?"]
      [Date "2016.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Stark, Ingo"]
      [Result "0-1"]
      [WhiteElo "1870"]
      [BlackElo "2180"]
      [PlyCount "66"]
      [EventDate "2016.??.??"]
      
      1. b4 d5 2. Bb2 Bf5 3. Nf3 e6 4. e3 Nf6 5. c4 Nbd7 6. b5 Nc5 (6... Nb6 7. cxd5
      Nbxd5 8. a3 Be7 9. Be2 O-O 10. O-O Rc8 11. d3 Bg4 12. Nbd2 Nd7 13. Nc4 Bh5 14.
      g3 Bf6 15. d4 c6 16. Nd6 Rc7 17. e4 Nb8 18. a4 Qxd6 19. Ba3 Qd8 20. exd5 Be7
      21. dxe6 {
      Bulcourf,C (2260)-Franchi,G (2185)/Buenos Aires Intercoop 2002/1-0 (44)}) 7. d4
      Nce4 8. Nfd2 $146 (8. c5 Ng4 9. Qa4 Ngxf2 10. Rg1 b6 11. c6 Bd6 12. h3 Bg3 13.
      Ke2 Nd6 14. Qb3 Nc4 15. Ne1 Qg5 16. Na3 Bd3+ {
      0-1 hal1958-guigao/playchess.de 2003}) (8. Nc3 Bb4 9. Qb3 Bxc3+ 10. Bxc3 O-O
      11. Bb4 Re8 12. Be2 a5 13. bxa6 bxa6 14. O-O a5 15. Bc3 a4 16. Qa3 Nd7 17. cxd5
      exd5 18. Bd3 Qf6 19. Bxe4 Bxe4 20. Nd2 Bd3 21. Rfe1 Nb6 22. Bb4 Bc4 {
      emeryt85-oko1962/kurnik 2014/0-1}) 8... Bb4 9. f3 (9. Qa4 Nxd2 10. Nxd2 Bxd2+
      11. Kxd2 Ne4+ 12. Ke1 Qf6 13. b6+ c6 14. cxd5 exd5 $19) 9... Nxd2 10. Nxd2 dxc4
      (10... O-O 11. Qa4 Qe7 12. c5 Bxd2+ 13. Kxd2 $15) 11. Bxc4 Nd5 12. Bxd5 (12.
      Qe2 Qg5 13. f4 Qg6 $15) 12... exd5 $17 (12... Qxd5 $143 13. e4 Bxe4 14. fxe4
      Qxe4+ 15. Kf2 Qf5+ 16. Nf3 Qxb5 17. Qb3 $14) 13. O-O Qg5 (13... Bd3 14. Rf2 Qe7
      15. Qb3 Bxb5 16. Qxd5 $11) 14. Qe2 $15 O-O 15. a3 Bd6 16. e4 Bf4 (16... Rfe8
      17. Bc1 $15) 17. Bc3 Rfe8 18. Rae1 h5 (18... a6 19. bxa6 bxa6 20. Qf2 $15) 19.
      Qf2 (19. Qd3 $5 $11) 19... Bd7 $15 20. a4 a6 21. g3 (21. Nb3 b6 22. bxa6 Bxa4
      23. Qc2 $17) 21... h4 22. Qg2 $2 (22. Kg2 $142 $19) 22... hxg3 23. hxg3 Bxg3 (
      23... Be3+ $142 24. Rf2 axb5 $19) 24. exd5 $2 (24. Re2 axb5 25. Rb1 Rxa4 $19)
      24... f5 (24... Rxe1 $142 25. Rxe1 Bh3 (25... axb5 26. Ne4 Qh4 27. Qxg3 Qxg3+
      28. Nxg3 bxa4 29. Re7 $16) 26. Qxh3 Bxe1+ 27. Qg2 Qe3+ 28. Kf1 Re8 29. bxa6
      bxa6 $19) 25. f4 (25. Nb3 axb5 26. Nc5 Qh4 $19) 25... Bxf4 $19 26. Qxg5 Bxg5
      27. Nf3 Be3+ 28. Kg2 f4 29. Ne5 Bc8 (29... axb5 $6 30. Nxd7 bxa4 31. Nc5 $17)
      30. Rh1 (30. b6 cxb6 31. d6 Be6 $19) 30... Bf5 31. Kf3 axb5 32. Rh5 (32. Rxe3
      fxe3 33. axb5 Ra3 $19) 32... g6 33. Rh6 (33. Rg5 bxa4 34. Nxg6 Be4+ 35. Kg4
      Bxg6 36. Rxg6+ Kf7 $19) 33... Kg7 (33... Kg7 34. Reh1 g5 $19 (34... bxa4 $6 35.
      Rh7+ Kf6 36. Rf7+ Kg5 37. Rh2 $15)) 0-1
      
      [Event "Berlin Lichtenberger op"]
      [Site "?"]
      [Date "2007.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Hesselbarth, Karlheinz"]
      [Result "1/2-1/2"]
      [WhiteElo "1985"]
      [BlackElo "1905"]
      [PlyCount "52"]
      [EventDate "2007.??.??"]
      
      1. b4 d5 2. Bb2 Nf6 3. e3 Bf5 4. Nf3 e6 5. b5 c5 6. bxc6 Nxc6 7. Bb5 Be7 (7...
      a6 8. Be2 $15) 8. Nd4 $11 Qb6 9. Nc3 (9. Nxf5 $5 Qxb5 10. Bxf6 (10. Nxg7+ $143
      Kf8 11. Nxe6+ fxe6 $19) 10... gxf6 11. Nc3 $11) 9... Bg6 $15 10. Rb1 Rc8 (10...
      Qc7 11. O-O $11) 11. Qe2 O-O 12. Na4 (12. Bxc6 bxc6 13. Ba3 Qc7 14. Bxe7 Qxe7
      $15) 12... Qc7 13. Bd3 (13. Nxc6 bxc6 14. Bd3 Bh5 $15) 13... Nxd4 14. Bxd4 e5
      15. Bxg6 hxg6 16. Ba1 Qxc2 17. Qb5 Ne4 18. O-O (18. Rd1 $142 Bh4 19. g3 $19)
      18... Qxa2 $4 (18... Nxd2 $142 19. Rb2 Qc1 20. Rxd2 Qxd2 21. Bxe5 Qb4 22. Qxb4
      Bxb4 $19) 19. Nc3 Qxd2 (19... Nxc3 $142 20. Bxc3 Bd6 $17) 20. Nxe4 $11 dxe4 21.
      Qxb7 (21. Qxe5 $142 $5 Bf6 22. Qxe4 Bxa1 23. Rxa1 $11) 21... Bf6 $17 22. Qxa7
      Rc2 23. Qa4 Qd3 24. Rbd1 Qc4 25. Qxc4 Rxc4 26. Rd5 Re8 1/2-1/2
      
      [Event "9th Berlin Germany, Lichtenberger Somme"]
      [Site "?"]
      [Date "2010.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Schmidt, Juergen"]
      [Result "1/2-1/2"]
      [WhiteElo "1965"]
      [BlackElo "2015"]
      [PlyCount "71"]
      [EventDate "2010.??.??"]
      
      1. b4 d5 2. Bb2 Bf5 3. Nf3 Nf6 4. e3 e6 5. c4 Nbd7 6. Qb3 Be7 (6... c6 7. d4 (
      7. d3 Bd6 8. Nbd2 Qe7 9. a3 b5 10. Be2 a5 11. bxa5 Rxa5 12. O-O O-O 13. Rfe1
      bxc4 14. dxc4 Bg4 15. Nd4 Bxe2 16. Nxc6 Qe8 17. Nxa5 Bd3 18. Qxd3 Nc5 19. Qc2
      Nfe4 20. Nxe4 Nxe4 21. cxd5 exd5 {
      ferminkatcho (1825)-fadilii68 (1745)/kurnik 2012/1-0 (36)}) 7... Bd6 8. Nbd2
      O-O 9. Be2 Qe7 10. c5 Bc7 11. O-O Bg4 12. Qc2 e5 13. dxe5 Nxe5 14. Rae1 Bxf3
      15. Bxf3 a5 16. a3 axb4 17. axb4 Nxf3+ 18. Nxf3 Ne4 19. Bd4 f5 20. g3 Rae8 21.
      Rb1 {Teichmann,E (2290)-Moskalenko,V (2525)/Metz op 9th 1991/1/2-1/2 (42)}) 7.
      Be2 O-O 8. O-O a5 $146 (8... c5 9. cxd5 cxb4 10. dxe6 Bxe6 11. Qd1 Rc8 12. Nd4
      Qb6 13. Nxe6 Qxe6 14. d4 Rfd8 15. Bd3 Nb6 16. Nd2 Nfd5 17. Qf3 Qf6 18. Qh3 g6
      19. Rac1 Qg7 20. Ba1 Nc3 21. a3 a5 22. Qf3 Rc7 23. axb4 {
      Collas,D (2375)-Alcazar Jimenez,V (2245)/IX Open, Albacete ESP 2001/0-1 (40)})
      9. a3 (9. bxa5 Nc5 10. Qc3 dxc4 11. Qxc4 Rxa5 12. Bxf6 Bxf6 $15) 9... axb4 (
      9... dxc4 10. Bxc4 Nb6 11. Rc1 $15) 10. axb4 Rxa1 11. Bxa1 dxc4 12. Bxc4 Nb6 (
      12... c6 13. Nd4 $15) 13. Nd4 (13. d3 Nxc4 14. dxc4 Qd3 $15) 13... Bg6 $15 14.
      Be2 (14. d3 Qd6 15. Nb5 Qxb4 16. Qxb4 Bxb4 17. Bxf6 gxf6 18. Nxc7 Rc8 $19)
      14... Nfd5 {Attacks the isolani on b4} 15. b5 e5 (15... Bf6 16. Bb2 $15) 16.
      Nf3 $11 e4 17. Ne5 Bf5 18. Nc3 (18. d3 exd3 19. Bxd3 Bxd3 20. Qxd3 Bd6 $11)
      18... Bf6 19. Nxd5 Qxd5 20. Qxd5 Nxd5 21. f4 (21. Bc4 $142 Nb6 22. Bb3 $11)
      21... exf3 (21... Be7 22. g4 Bc8 23. Bc4 $15) 22. gxf3 (22. Bxf3 $142 $5 Be6
      23. Bxd5 Bxd5 24. Nd7 $16) 22... Bh3 (22... Ra8 23. Bd4 $11) 23. Rc1 Ra8 24.
      Bc4 Be6 (24... Nb6 25. Bxf7+ Kf8 26. Bb3 Rxa1 27. Rxa1 Bxe5 28. Ra7 $11) 25.
      Bd4 $14 Bd8 (25... Rd8 26. f4 $11) 26. Nd3 c6 27. bxc6 bxc6 28. e4 Nc7 (28...
      Ne7 29. Bxe6 fxe6 30. Be3 $14) 29. Bxe6 (29. Be3 $5 $16) 29... Nxe6 $14 30. Be3
      Rc8 (30... Ra3 31. Nc5 $16) 31. Rc4 f6 $2 (31... Be7 32. Ne5 Nd8 33. Ra4 $14)
      32. Kf2 (32. Nb4 $142 $5 $18) 32... Be7 $14 33. Nf4 Nxf4 34. Bxf4 Kf7 (34... g5
      35. Be3 $14) 35. d4 Ke6 36. d5+ 1/2-1/2
      
      [Event "Berlin GER"]
      [Site "?"]
      [Date "2012.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Bruedigam, Martin"]
      [Result "0-1"]
      [WhiteElo "1935"]
      [BlackElo "2290"]
      [PlyCount "76"]
      [EventDate "2012.??.??"]
      
      1. b4 {A00: Irregular Openings} Nf6 2. Bb2 d5 3. e3 Bf5 4. Nf3 Nbd7 5. c4 e6 6.
      a3 c6 7. Nc3 Bd6 8. Be2 (8. c5 Bc7 9. Be2 O-O 10. Nh4 Re8 11. Nxf5 exf5 12. O-O
      f4 13. exf4 Bxf4 14. g3 Bh6 15. Re1 g6 16. f4 Nf8 17. Bf3 Rxe1+ 18. Qxe1 Bg7
      19. Qc1 Ne6 20. Ne2 a5 21. Rb1 Qe7 22. Nd4 axb4 {
      Degterev,P (2275)-Leonard,M (2040)/WC-2012-S-00006 2009/1/2-1/2 (33)}) 8... O-O
      $146 (8... Ng4 9. Nd4 Qh4 10. Bxg4 Bxg4 11. Nf3 Bxf3 12. Qxf3 Qxc4 13. Qe2 Qh4
      14. g3 Qh3 15. Qf1 Qf5 16. Qg2 Ne5 17. Bc1 a5 18. b5 c5 19. O-O Nf3+ 20. Kh1 h5
      21. h3 g5 22. Ne2 e5 23. Nc3 {Tejler,A-Katzensteiner,E/corr SOK-88-20 1988/0-1}
      ) 9. d3 (9. cxd5 cxd5 (9... Nxd5 $2 10. e4 $18) 10. Rc1 Qe7 $11) 9... e5 (9...
      Qc7 10. c5 Be7 11. O-O $11) 10. cxd5 (10. e4 Be6 (10... dxe4 $2 11. dxe4 Nxe4
      12. Nxe4 Bxb4+ 13. axb4 Bxe4 14. O-O $18 (14. Nxe5 $6 Nxe5 15. Qxd8 Raxd8 16.
      Bxe5 Rfe8 $18)) 11. exd5 cxd5 $11) 10... cxd5 11. e4 Be6 (11... dxe4 $2 12.
      dxe4 Nxe4 13. Nxe4 Bxb4+ 14. axb4 Bxe4 15. O-O $18) 12. Ng5 a5 13. Nxe6 fxe6
      14. Qb3 (14. exd5 Nxd5 15. Nxd5 exd5 $11) 14... axb4 $15 15. axb4 Rxa1+ 16.
      Bxa1 Qb6 17. O-O Qxb4 18. Qa2 Qc5 19. exd5 exd5 20. Bf3 Nb6 21. Qa7 $2 (21. Qb3
      Qb4 22. Qxb4 Bxb4 $15) 21... Qc6 (21... Ra8 $142 $5 22. Qxb7 Rxa1 23. Rxa1 Qxc3
      $19) 22. Qa2 $17 Kh8 (22... Ra8 23. Qb2 $17) 23. Qb1 Bc5 24. Re1 Bd4 25. Nd1
      Bxa1 26. Qxa1 e4 27. dxe4 dxe4 28. Be2 Nbd5 29. Qb1 b6 30. h3 Qc5 31. Qb3 Ra8
      32. Qg3 h6 33. Bf1 $2 (33. Ne3 $5 $17) 33... Ra1 (33... Qb4 $142 34. f3 Ra3 $19
      ) 34. Kh1 $4 (34. Be2 $142 $19) 34... Nc3 $3 35. Qb8+ (35. Nxc3 Rxe1 {Pinning}
      (35... Rxe1 {Deflection})) (35. Qxc3 Qxc3 {Combination}) 35... Kh7 36. Qd8 Nxd1
      (36... Nfd5 $142 37. Qh4 Nxd1 38. Qxe4+ g6 $19) 37. Rxd1 Rxd1 38. Qxd1 Qxf2 0-1
      
      [Event "Berlin Lichtenberger op 7th"]
      [Site "?"]
      [Date "2008.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Reinacher, Detlev"]
      [Result "1-0"]
      [WhiteElo "1980"]
      [PlyCount "79"]
      [EventDate "2008.??.??"]
      
      1. b4 {A00: Irregular Openings} Nf6 2. Bb2 d5 3. e3 e6 4. a3 c6 5. Nf3 Nbd7 6.
      c4 Bd6 7. Nc3 b6 8. cxd5 $146 cxd5 9. Nb5 Bb8 (9... Be7 10. Rc1 O-O 11. Be2 $14
      ) 10. Rc1 $16 Bb7 11. Be2 (11. Qc2 O-O 12. Nc7 Bxc7 13. Qxc7 Qb8 $16) 11... a6
      (11... O-O 12. O-O $14) 12. Nbd4 Ba7 (12... a5 $5 $14) 13. Nc6 Bxc6 14. Rxc6
      O-O (14... Bb8 15. O-O $16) 15. Bxa6 Nb8 (15... Bb8 16. Be2 $18) 16. Rc8 Qd7 (
      16... Qe7 17. Rxf8+ Kxf8 18. Bb5 $18) 17. Rxf8+ (17. Ne5 Qe7 18. Rxf8+ Kxf8 $18
      ) 17... Kxf8 18. Bd3 h6 (18... Qb7 19. Bxf6 gxf6 20. Bb5 $18) 19. O-O Qe7 (
      19... Nc6 20. Qa1 Ne8 21. Bb5 $18) 20. Qc2 (20. Qa4 Nbd7 $18) 20... Nbd7 21.
      Rc1 e5 22. Bb5 e4 (22... Rd8 23. Bxd7 Nxd7 24. Qh7 $18) 23. Ne1 (23. Nh4 $142
      Kg8 24. Qc7 Qd8 $18) 23... Rd8 24. f4 exf3 (24... Bb8 25. Qc3 $18) 25. Nxf3 Bb8
      26. Qf5 (26. Bd4 Kg8 $18) 26... g6 (26... Qe4 27. Bd3 Qe8 28. g3 $18) 27. Qh3
      h5 28. Qh4 Ne5 29. Qg5 (29. Rc6 Nfg4 (29... Nxc6 $4 30. Bxf6 (30. Bxc6 $6 Rd6
      31. Bb5 Bc7 $14) (30. Qxf6 $6 Qxf6 31. Bxf6 Rc8 $11) 30... Qd6 31. Bxc6 $18)
      30. Qxe7+ Kxe7 31. Nxe5 Bxe5 32. Bxe5 Nxe5 33. Rxb6 Rc8 $18) 29... Nfg4 30.
      Qxe7+ Kxe7 31. Bd4 Nxf3+ (31... Bd6 $142 $18) 32. gxf3 Nxh2 33. Kg2 Rd6 (33...
      Bd6 $18) 34. Rc8 (34. Kxh2 $2 Rc6+ 35. Kg2 Rxc1 $19) 34... Rd8 35. Rxd8 Kxd8
      36. Bxb6+ (36. Bf6+ Kc7 37. Be5+ Kb7 38. Bxh2 Bxh2 39. Kxh2 g5 $18) 36... Ke7
      37. a4 g5 (37... h4 38. f4 Ng4 39. a5 $18) 38. a5 g4 (38... h4 39. f4 gxf4 40.
      exf4 $18) 39. fxg4 Nxg4 40. a6 1-0
      
      [Event "Lichtenberger Sommer"]
      [Site "?"]
      [Date "2016.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Baumgaertner, Andre"]
      [Result "1-0"]
      [WhiteElo "1870"]
      [BlackElo "1720"]
      [PlyCount "105"]
      [EventDate "2016.??.??"]
      
      1. b4 d5 2. Bb2 e6 3. Nf3 Nf6 4. a3 Be7 5. e3 O-O 6. c4 c6 7. Nc3 dxc4 (7... a5
      8. c5 Nfd7 9. d4 b6 10. Be2 e5 11. O-O exd4 12. exd4 Re8 13. Qc2 Bf6 14. Bd3 g6
      15. b5 Bb7 16. Nxd5 cxd5 17. c6 Nf8 18. cxb7 Ra7 19. Qc8 Qe7 20. Qg4 Rxb7 21.
      Ne5 Bxe5 22. dxe5 {
      Berezovsky,I (2405)-Nijboer,F (2550)/Bundesliga 2002/1-0 (80)}) 8. Bxc4 b5 (
      8... Nbd7 9. d4 Nb6 10. Bd3 Nbd5 11. O-O Bd7 12. Rc1 Rc8 13. Qb3 a6 14. Na4 h6
      15. Nc5 Bxc5 16. bxc5 Re8 17. Ne5 Qc7 18. a4 Red8 19. Rb1 Rb8 20. Ba3 Nh7 21.
      Nxd7 Qxd7 22. Bb4 Nxb4 23. Qxb4 {anonymouuus-chameleon85/kurnik 2014/1-0 (43)})
      9. Be2 Bb7 10. d4 $146 (10. O-O a5 11. Qb3 a4 12. Qc2 Nd5 13. Nxd5 exd5 14.
      Rac1 Bf6 15. Bxf6 Qxf6 16. d4 Nd7 17. g3 g6 18. Nh4 Qe6 19. Ng2 f5 20. Nf4 Qe7
      21. h4 Nf6 22. Bf3 Ne4 23. Bxe4 fxe4 24. Qc5 Qxc5 {
      ludice (1760)-kszz/kurnik 2011/1-0 (70)}) 10... Nbd7 (10... a5 11. bxa5 Qxa5
      12. O-O $11) 11. O-O Nd5 (11... a5 12. Qb3 $11) 12. Ne4 (12. Nxd5 exd5 13. Qc2
      a5 $14) 12... a5 $11 13. Nc5 Qc7 14. Qd2 Nxc5 15. bxc5 f5 16. Bd3 h6 (16...
      Rad8 17. Bc3 Nxc3 18. Qxc3 $14) 17. g3 (17. Ne5 Bf6 $14) 17... b4 (17... Bf6
      18. Rfb1 $11) 18. Kg2 (18. axb4 axb4 19. Bc4 Bf6 $14) 18... Ba6 (18... b3 $5
      $11) 19. Bxa6 $14 Rxa6 20. axb4 Nxb4 (20... a4 $5 $14) 21. Bc3 $16 Rb8 22. Rfb1
      (22. Bxb4 Rxb4 23. Qxb4 axb4 24. Rxa6 Qd8 25. Rxc6 g5 $18) 22... Qc8 (22... Nd5
      23. Rxb8+ Qxb8 24. Rxa5 Rxa5 25. Bxa5 $16) 23. Bxb4 $18 axb4 24. Rxa6 Qxa6 25.
      Rxb4 Rb5 26. Qb2 Qb7 (26... Bf6 27. Qb3 Rxb4 28. Qxb4 $16 (28. Qxe6+ Kh8 $17))
      27. Rxb5 Qxb5 $4 (27... cxb5 $142 28. Qa2 Kf7 $18) 28. Qa2 Kf7 (28... Bf6 29.
      Qxe6+ Kf8 30. Qxf5 $18) 29. Qa8 (29. Ne5+ $142 Kg8 30. Qxe6+ Kh7 31. Qxf5+ Kg8
      32. Qf7+ Kh7 33. Qxe7 $18) 29... Bf6 30. Qc8 Ke7 31. Qc7+ Ke8 32. Qd6 Kf7 (
      32... Qc4 33. Qxc6+ Kd8 34. Qd6+ Kc8 35. Qb6 $18) 33. Qd7+ Be7 (33... Kf8 34.
      Qxe6 Qb7 $18) 34. Ne5+ Kf6 (34... Kg8 35. Qxe6+ Kh7 36. Qxf5+ Kg8 37. Qe6+ Kh7
      38. Qxe7 h5 $18) 35. Nxc6 (35. Qe8 Qf1+ 36. Kxf1 Bxc5 37. Qf7+ Kg5 38. h4#)
      35... Bf8 (35... Bxc5 36. Ne5 Qxd7 37. Nxd7+ Ke7 38. Nxc5 $18 (38. dxc5 $6 Kxd7
      39. Kf3 g5 $16)) 36. Qe8 (36. Qd8+ $142 Kg6 37. Ne5+ Kh7 38. Qxf8 Qb7+ 39. c6
      Qb1 $18) 36... Bxc5 37. dxc5 Qxc5 (37... Qb7 38. e4 $1 Qxc6 39. Qxc6 f4 $18)
      38. Nd4 (38. f4 $142 Qc2+ 39. Kh3 Qxc6 40. Qxc6 $18) 38... Qd5+ (38... Qd6 39.
      f4 Qe7 40. Qc6 $18) 39. Nf3 g5 (39... Qd6 40. h4 Qe7 41. Qc6 $18) 40. Qh8+ Kg6
      41. Qg8+ (41. h4 Kf7 42. hxg5 hxg5 43. Qh5+ Ke7 44. Qxg5+ Kd6 45. Qd8+ Kc5 46.
      Qxd5+ Kxd5 $18) 41... Kf6 42. h3 Qe4 (42... Qb7 43. g4 $18) 43. Qh8+ (43. Qh7
      $142 $5 g4 44. hxg4 Qxg4 45. Qxh6+ Ke7 46. Qh4+ Qxh4 47. gxh4 Kf6 $18) 43...
      Kg6 44. Qd4 Qc6 (44... Qxd4 45. exd4 Kf7 46. Ne5+ Ke7 47. g4 $18) 45. e4 $1
      Qxe4 (45... Qxe4 46. Qxe4 {Combination}) (45... fxe4 46. Ne5+ {Double attack})
      46. Qxe4 fxe4 47. Nd4 (47. Nd2 Kf5 $18) 47... Kf6 48. Nc2 (48. Kf1 $5 h5 $18)
      48... h5 49. Kf1 Ke5 50. Ke2 h4 (50... Kd6 51. Ke3 Kd5 52. Nb4+ Ke5 53. g4 $18)
      51. gxh4 gxh4 52. Ke3 Kf5 (52... Kd5 53. Nb4+ Ke5 54. Nc6+ Kd6 55. Nd4 $18) 53.
      Ne1 1-0
      
      [Event "10th Lichtenberger Sommer"]
      [Site "?"]
      [Date "2011.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Schneider, Eckehard"]
      [Result "1-0"]
      [WhiteElo "1930"]
      [BlackElo "1730"]
      [PlyCount "101"]
      [EventDate "2011.??.??"]
      
      1. b4 Nf6 2. Bb2 e6 3. a3 d5 4. e3 c5 5. b5 a6 6. c4 dxc4 7. Bxc4 Bd7 8. a4
      axb5 9. axb5 Rxa1 10. Bxa1 Be7 $146 (10... Qa5 11. Bc3 Qb6 12. Bxf6 gxf6 13.
      Qb3 Bg7 14. Ne2 O-O 15. O-O e5 16. d4 exd4 17. exd4 Rd8 18. dxc5 Qxc5 19. Bxf7+
      Kh8 20. Bc4 Bf5 21. h3 Nd7 22. Rd1 Rc8 23. Be6 Bxe6 24. Qxe6 Ne5 25. Rc1 {
      ukres05-emeryt85 (1605)/kurnik 2011/1-0 (36)}) 11. Nf3 O-O 12. O-O Bc8 (12...
      Ne4 13. Nc3 Nd6 14. Be2 $11) 13. Nc3 (13. d4 b6 $14) 13... Nbd7 $11 14. Na4 b6
      15. Qb3 Bb7 16. Be2 Qc7 17. Rd1 Ra8 18. Nb2 (18. d4 cxd4 19. Rxd4 Bd5 $15)
      18... Ne4 (18... Ng4 $5 19. g3 Nge5 $17) 19. Nc4 Bf6 20. Bxf6 Nexf6 21. Qb2 Ra4
      22. Nce5 Bd5 23. Nxd7 Nxd7 24. Ra1 Qa7 25. Rxa4 Qxa4 26. h3 f6 27. g4 (27. d4
      $5 $11) 27... Qa8 $17 28. Ne1 Ne5 29. d4 Nc4 30. Qc1 Qa2 31. Bf3 (31. Bxc4 Bxc4
      32. dxc5 bxc5 $11) 31... Qb3 (31... cxd4 $142 $5 32. Bxd5 exd5 $17) 32. Bxd5
      exd5 33. dxc5 bxc5 34. Qa1 Qxb5 (34... h6 $142 $5 35. Qa8+ Kh7 36. Qxd5 Qxb5
      $11) 35. Qa8+ $16 Kf7 36. Qxd5+ Kf8 37. Nd3 Ke7 (37... Nd2 $5 $16) 38. Nxc5 $18
      (38. Qxc5+ $143 Qxc5 39. Nxc5 Kd6 $16) 38... g5 $4 (38... Ne5 $142 $18) 39.
      Qe6+ Kd8 40. Qxf6+ Kc7 41. Qxg5 (41. Ne6+ Kd7 42. Nxg5 Nd2 43. Qf7+ Kd6 44.
      Nxh7 Qf1+ 45. Kh2 Qc4 46. Qf8+ Kd7 $18) 41... Kc6 42. Ne6 Qb1+ 43. Kh2 Qe4 (
      43... Qf1 44. Qf6 $18) 44. Qc5+ Kd7 45. Qd4+ (45. Nf8+ $5 Ke8 46. Nxh7 Qf3 $18)
      45... Qxd4 46. Nxd4 (46. exd4 $6 Kxe6 47. Kg3 Nd6 $14) 46... Kd6 47. Kg3 Ke5
      48. h4 Ke4 49. Nf3 h6 (49... Kd5 50. Ng5 h6 51. Kf4 $18) 50. h5 Nd6 51. Nd4 1-0
      
      [Event "Berlin Lichtenberger op 7th"]
      [Site "?"]
      [Date "2008.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Mildenberger, Hans"]
      [Result "1/2-1/2"]
      [WhiteElo "1980"]
      [PlyCount "56"]
      [EventDate "2008.??.??"]
      
      1. b4 Nf6 2. Bb2 e6 3. a3 d5 4. e3 c5 5. b5 Be7 6. Nf3 O-O 7. c4 dxc4 (7...
      Nbd7 8. d4 b6 9. Nbd2 Bb7 10. a4 Qc7 11. Be2 Ne4 12. O-O f5 13. Nxe4 fxe4 14.
      Nd2 Bf6 15. Qc2 e5 16. cxd5 exd4 17. exd4 Bxd5 18. Nxe4 Bxe4 19. Qxe4 Rae8 20.
      Bc4+ Kh8 21. Qd3 cxd4 22. Bxd4 {
      vitorluiz (2350)-maaac (2370)/net-chess.com 2007/1-0 (56)}) 8. Bxc4 b6 $146 (
      8... Bd7 9. O-O a6 10. a4 axb5 11. axb5 Rxa1 12. Bxa1 Nd5 13. e4 Nb6 14. Ba2
      Bxb5 15. Re1 Na6 16. Nc3 Bc6 17. Ne5 Nb4 18. Qg4 Bf6 19. Nf3 Nxa2 20. e5 Bxf3
      21. Qxf3 Bg5 22. Nxa2 Qxd2 {0-1 varin123-odboju/playok.com 2012}) 9. O-O Bb7
      10. d3 Nbd7 11. e4 Qc7 12. Re1 Ng4 13. h3 Nge5 14. Qe2 Nxf3+ 15. Qxf3 (15. gxf3
      $143 Bf6 $17) 15... e5 (15... a6 16. bxa6 Bxa6 17. Bxa6 Rxa6 18. Nc3 $11) 16.
      Nc3 $14 Nf6 17. g4 g6 (17... Qd6 18. Qg3 $11) 18. Bc1 $14 Kg7 19. Bd2 a6 20. a4
      a5 21. Kg2 Rad8 22. Rad1 Rd7 23. Rg1 Qd6 24. Bc1 Qd4 25. Ne2 Qxc4 $4 (25... Qd6
      $142 $11) 26. Qxf6+ $4 (26. Bh6+ $142 $1 Kg8 27. dxc4 Rxd1 28. Bxf8 (28. Rxd1
      $6 Bxe4 29. Bxf8 Bxf3+ 30. Kxf3 Kxf8 $16) 28... Kxf8 29. Qe3 $18) 26... Bxf6
      27. dxc4 Rxd1 28. Rxd1 Bxe4+ 1/2-1/2
      
      [Event "Berlin op"]
      [Site "?"]
      [Date "2002.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Mayer, Herbert"]
      [Result "1/2-1/2"]
      [WhiteElo "1805"]
      [BlackElo "1740"]
      [PlyCount "82"]
      [EventDate "2002.??.??"]
      
      1. b4 e6 2. Bb2 Nf6 3. b5 a6 4. a4 d5 5. e3 c5 6. c4 Bd6 (6... Nbd7 7. Nf3 Be7
      8. Be2 O-O 9. O-O axb5 10. axb5 Rxa1 11. Bxa1 dxc4 12. Bxc4 b6 13. d3 Bb7 14.
      Nbd2 Qc7 15. e4 Ng4 16. Qe2 Bd6 17. g3 Nge5 18. Bb3 Rd8 19. Ne1 Be7 20. f4 Ng6
      21. Nef3 {Teichmann,E (2365)-Rujevic,M (2000) Australian Masters 1998 1/2 (31)}
      ) 7. Nf3 Nbd7 8. d3 b6 $146 (8... O-O 9. Nbd2 Re8 10. Be2 b6 11. O-O axb5 12.
      axb5 Bb7 13. Qc2 dxc4 14. Rxa8 Qxa8 15. dxc4 Be4 16. Nxe4 Nxe4 17. Ra1 Qb7 18.
      Nd2 Nef6 19. Bf3 Qc7 20. g3 Ne5 21. Bg2 Nfg4 22. Ra3 Rd8 23. f4 {
      Doctor? 3.0-Comet B25 -1 Cuba Libre Inc. 2004 [Fritz 6 (3s) ] 1-0 (33)}) (8...
      h6 9. Be2 $11) 9. Nbd2 Bb7 10. Be2 O-O 11. O-O (11. h3 dxc4 12. Nxc4 Ne8 $11)
      11... Re8 (11... Qc7 12. cxd5 Nxd5 13. bxa6 Rxa6 14. h4 $11) 12. Qc2 h6 13. h3
      Rc8 (13... Qe7 14. Bc3 $11) 14. Rfe1 a5 15. Rac1 Nh7 16. cxd5 exd5 17. Qb1 Ng5
      18. Nxg5 Qxg5 19. Nf3 Qe7 20. Qa1 Ne5 (20... f5 $5 $11) 21. Nxe5 $14 Bxe5 22.
      Bxe5 Qxe5 23. Qxe5 Rxe5 24. Bf3 Re7 25. d4 c4 26. Rc3 Rd8 27. g3 Bc8 28. Bg2 g5
      29. f3 f5 30. f4 (30. e4 fxe4 31. fxe4 dxe4 $11) 30... Kg7 31. Kf2 Kf6 32. Rg1
      Rde8 $4 (32... Ke6 $142 $15) 33. Bxd5 $18 Be6 34. Bf3 Rd8 35. Rcc1 (35. d5 Bxd5
      36. Rd1 Red7 37. Rxd5 Rxd5 38. Bxd5 Rxd5 39. Rxc4 gxf4 40. exf4 Ke7 $16) 35...
      Bf7 36. h4 g4 37. Bc6 Rc7 $2 (37... Re6 38. Rxc4 Rxe3 39. Kxe3 Bxc4 40. Kd2 $16
      ) 38. Rc3 (38. d5 Bxd5 39. Rgd1 Ke6 40. Rxc4 Bxc4 41. Rxd8 h5 $18) 38... Ke7 $2
      (38... Re7 39. Rgc1 $18) 39. Re1 (39. Rd1 Kd6 40. d5 Bg8 $18) 39... Kd6 $2 (
      39... Rcc8 $16) 40. Rec1 $4 (40. d5 $142 $18) 40... Bd5 $14 41. Bxd5 Kxd5
      1/2-1/2
      
      [Event "Berlin Lichtenberger op 8th"]
      [Site "?"]
      [Date "2009.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Schoenemann, Manfred"]
      [Result "1-0"]
      [WhiteElo "1945"]
      [BlackElo "1820"]
      [PlyCount "63"]
      [EventDate "2009.??.??"]
      
      1. b4 e6 2. Bb2 Nf6 3. b5 d5 4. e3 Be7 5. Nf3 O-O 6. c4 a6 7. a4 c5 8. Be2 Bd7
      $146 (8... dxc4 9. Bxc4 Bd7 10. O-O Ne4 11. Nc3 Nd6 12. Qb3 Nxc4 13. Qxc4 b6
      14. Ne4 Qe8 15. Nc3 Qc8 16. h4 Be8 17. Qg4 f5 18. Qg3 Bf6 19. Rfc1 Qb7 20. Ne5
      Nd7 21. Nc4 axb5 22. axb5 Rd8 23. Nd6 {
      Majdiuk,B-Fojcik,H/POL-ch (Women) 1978/1-0 (63)}) (8... axb5 9. axb5 Rxa1 10.
      Bxa1 Nbd7 (10... Qa5 11. Nc3 Bd7 12. O-O Rd8 13. Qb3 Be8 14. Bb2 Nbd7 15. Ra1
      Qc7 16. d4 cxd4 17. Nxd4 dxc4 18. Qxc4 Qe5 19. Na4 Qd5 20. Rc1 Ne5 21. Qxd5
      Nxd5 22. g3 Bf6 23. Nb3 h6 24. Nbc5 b6 25. Ne4 {
      carocan-killerdexter (1740)/kurnik 2012/1/2-1/2 (57)}) 11. O-O b6 (11... Qc7
      12. Nc3 Rd8 13. Na4 b6 14. Qc2 e5 15. cxd5 Nxd5 16. d4 Nb4 17. Qc3 Qa7 18. Qb3
      e4 19. Nd2 Nf6 20. Bc4 Bf8 21. Bc3 Bf5 22. Ra1 Qb7 23. Nf1 Nbd5 24. Bb2 h6 25.
      Rd1 Nb4 26. dxc5 {Nielsen,J-Flarup/Denmark 1973/0-1 (47)}) 12. d4 Bb7 13. Nbd2
      Qc7 14. Qc2 Bd6 15. h3 {1/2-1/2 Gadjily,R (2265)-Allahverdiev,A/Baku Cup 1995})
      (8... Nbd7 9. d4 axb5 10. axb5 Rxa1 11. Bxa1 dxc4 12. Bxc4 cxd4 13. Bxd4 Qa5+
      14. Nbd2 Nb6 15. Bd3 Bd7 16. O-O Bxb5 17. Bxb6 Qxb6 18. Qb3 Qa5 19. Qxb5 Qxb5
      20. Bxb5 Nd5 21. Rb1 Nc3 22. Rb3 Rc8 23. Bc4 {
      Tilp,A-Lehmann,T/corr DDR 1987/1-0}) 9. Nc3 dxc4 10. Bxc4 axb5 11. axb5 Rxa1
      12. Bxa1 h6 13. O-O b6 14. Qb3 Qc7 15. Re1 Rc8 16. Qc2 Bd6 17. h3 Be8 18. Ne4
      Nh7 19. Nxd6 Qxd6 20. Be5 Qe7 21. Qb2 f6 22. Bc3 Bf7 23. Qa2 Ng5 24. Nxg5 hxg5
      25. Ra1 Rc7 26. Qa8 Rb7 $2 (26... Qd8 $142 $16) 27. Bd3 $18 f5 28. Be5 Kh7 $2 (
      28... Rd7 29. Qxb8+ Rd8 30. Qxb6 Rxd3 $18) 29. Bxb8 Rd7 30. Ra7 g6 (30... Bh5
      31. Bc4 Be8 32. Rxd7 Qxd7 33. Qa7 Qxd2 34. Be5 $18) 31. Rxd7 Qxd7 32. Qa7 (32.
      Qa7 Qxa7 33. Bxa7 $18) 1-0
      
      [Event "7th Berlin-ch Seniors"]
      [Site "?"]
      [Date "2011.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Dombrowsky, Michael"]
      [Result "0-1"]
      [WhiteElo "1770"]
      [BlackElo "2000"]
      [PlyCount "88"]
      [EventDate "2011.??.??"]
      
      1. b4 d5 2. Bb2 e6 3. e3 Nf6 4. b5 Bd6 5. Nf3 Nbd7 6. c4 O-O 7. Nc3 c5 8. Be2
      dxc4 (8... Nb6 9. d3 Qc7 10. a4 a5 11. h3 Rd8 12. Qc2 dxc4 13. dxc4 e5 14. O-O
      Be6 15. Nd2 Qe7 16. e4 Bc7 17. Nd5 Rd7 {
      pcmvr (2840)-cyrilrussell (2275)/net-chess.com 2009}) 9. Bxc4 Nb6 (9... b6 10.
      d4 Qc7 11. Be2 cxd4 12. exd4 Bb7 13. Rc1 Rac8 14. g3 Ba8 15. O-O Qb7 16. Re1
      Ne4 17. Qd3 Ng5 18. Kg2 Nf6 19. Qe3 h6 20. h4 Ng4 21. Qd3 Nh7 22. d5 exd5 23.
      Nd4 Ne5 24. Qf5 {pierred (2845)-fluors/net-chess.com 2015/0-1 (70)}) 10. Be2
      Nbd5 $146 (10... e5 11. O-O Re8 12. Ng5 e4 13. d3 Qc7 14. h3 Bf5 15. dxe4 Nxe4
      16. Ngxe4 Bxe4 17. Nxe4 Rxe4 18. Qd3 Re6 19. Rfd1 Na4 20. Rab1 Nxb2 21. Rxb2
      Rd8 22. Kf1 Be7 23. Qb3 Rxd1+ 24. Qxd1 Qh2 25. Bf3 {
      Kleiser,G (2165)-Spiegel,W (2225)/Liechtenstein op 1995/1/2-1/2 (71)}) (10...
      e5 11. O-O $15) 11. O-O Qe7 12. Nxd5 (12. Rc1 Rd8 $11) 12... exd5 13. d4 (13.
      Qa4 $5 $11) 13... c4 $17 14. Ne5 Nd7 (14... Bf5 15. a4 $17) 15. Nxd7 (15. Bf3
      Nb6 16. a4 Be6 $11) 15... Bxd7 $17 16. a4 f5 (16... Rac8 17. Bc3 $17) 17. Bf3
      $15 Be6 18. Qc1 Rf6 (18... a6 19. Bc3 $15) 19. g3 Qf7 (19... a6 20. Qc2 $15)
      20. Ba3 $11 Bc7 21. Bb4 (21. Qc3 Re8 $11) 21... Rh6 22. Qa3 g5 {
      Black prepares the advance f4} 23. Kg2 $2 (23. Bd6 Rc8 $11) 23... Re8 (23... f4
      $5 24. exf4 Bh3+ 25. Kg1 Bxf1 26. Rxf1 gxf4 $17) 24. Bd6 Bd8 (24... Bxd6 25.
      Qxd6 g4 26. Bd1 $15) 25. Rh1 (25. Kh1 Qg6 26. Qc5 Bb6 $15) 25... Qd7 (25... f4
      26. exf4 Bh3+ 27. Kg1 $15) 26. h3 (26. Be5 $5 $15) 26... f4 $17 27. g4 Bf7 (
      27... fxe3 $5 28. fxe3 Bxg4 29. hxg4 Rxd6 $17) 28. Be5 $15 fxe3 29. fxe3 (29.
      Qxe3 a6 $15) 29... Be7 (29... Bf6 30. Bxf6 Rxf6 31. Rhf1 $17) 30. Qc3 Bd6 31.
      Bxd6 Rxd6 32. Rae1 Bg6 33. Rhf1 Bd3 34. Rf2 (34. Be2 Rxe3 35. Bxd3 Rxd3 $15)
      34... Rde6 (34... Rf6 35. Qb4 Ref8 36. Qd2 $19) 35. Qc1 (35. Qa5 b6 (35... Rxe3
      $143 36. Rxe3 Rxe3 37. b6 axb6 38. Qxd5+ Qxd5 39. Bxd5+ Kg7 40. Rf7+ (40. Bxb7
      $4 c3 $19) 40... Kh8 41. Kf2 (41. Bxb7 $2 c3 $19) 41... Rxh3 42. Rf8+ Kg7 43.
      Rf7+ Kg6 44. Rxb7 $11) 36. Qd2 Rf6 $17) 35... h6 (35... a6 36. Qb2 $17) 36. Ra2
      (36. Qa3 Qd6 37. Qc3 Rxe3 38. Rxe3 Rxe3 $17) 36... Rf6 37. Rf2 Ref8 38. Qd1
      R8f7 (38... h5 39. Kg1 $19 (39. gxh5 $4 Rxf3 40. Rxf3 Be4 $19)) 39. Qd2 (39.
      Rg1 h5 $1 40. Rgf1 hxg4 41. Bxg4 Bxf1+ 42. Rxf1 Rxf1 43. Qxf1 Rxf1 44. Bxd7 c3
      45. Kxf1 c2 46. Be6+ Kf8 47. Bxd5 c1=Q+ 48. Kf2 Qc2+ 49. Ke1 Qxa4 50. Bxb7 Qxb5
      $19) 39... Kf8 (39... h5 40. e4 dxe4 41. Qxg5+ Kf8 42. Qxh5 Rxf3 43. Qh8+ Ke7
      44. Qe5+ Qe6 45. Rxf3 exf3+ 46. Kf2 Qxe5 47. Rxe5+ (47. dxe5 $4 c3 $19) 47...
      Kd6 48. Rc5 $19) 40. Qb4+ Ke8 (40... Qe7 $142 41. Qxe7+ Kxe7 $19) 41. a5 $4 (
      41. b6 Rxf3 $1 42. Rxf3 $19) 41... Rxf3 $1 42. Rxf3 Be4 43. Ref1 (43. b6 axb6
      44. Ra1 Rxf3 45. axb6 Rxe3+ 46. Kf2 Qf7+ 47. Kxe3 Qf4+ 48. Ke2 Bf3+ 49. Kf1
      Bxg4+ 50. Kg2 Qf3+ 51. Kg1 Qe3+ 52. Kg2 Bf3+ 53. Kf1 Qe2+ 54. Kg1 Qg2#) 43...
      Rxf3 (43... Bxf3+ $6 44. Rxf3 Rxf3 45. Kxf3 $15) 44. Rxf3 Qf7 (44... Qf7 45.
      Qd2 Qxf3+ 46. Kg1 c3 47. Qh2 Qd1+ 48. Kf2 Qd2+ 49. Kf1 Bd3+ 50. Qe2 Qxe2+ 51.
      Kg1 c2 52. e4 c1=Q#) (44... Bxf3+ 45. Kxf3 Qf7+ 46. Kg2 $11) 0-1
      
      [Event "Lichtenrader Autumn, Berlin GER"]
      [Site "?"]
      [Date "2005.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Haemmerlein, Thomas"]
      [Result "0-1"]
      [WhiteElo "1945"]
      [BlackElo "2205"]
      [PlyCount "78"]
      [EventDate "2005.??.??"]
      
      1. b4 Nf6 2. Bb2 e6 3. b5 c5 4. c4 d5 5. e3 Bd6 6. Nf3 O-O 7. Be2 Qe7 8. Nc3
      Nbd7 9. d3 b6 10. O-O Bb7 11. cxd5 $146 exd5 12. d4 (12. a4 Rfe8 $11 (12... Ne5
      13. d4 (13. g3 Qd7 14. Nxe5 Bxe5 15. d4 cxd4 16. exd4 Bd6 17. Qd3 Ne4 18. Bf3)
      (13. Re1 Rfe8 14. Qd2 c4 15. Nd4 g6 16. h3 Rac8 17. Rac1 cxd3 18. Bxd3) (13.
      Qd2 Rfe8 14. Rfe1 c4 15. d4 Ne4 16. Nxe4 Nxf3+ 17. Bxf3 dxe4 18. Be2) (13. h3
      Rfe8 14. a5 bxa5 15. Rxa5 Nxf3+ 16. Bxf3 d4 17. exd4 Bxf3 18. Qxf3) 13... Nxf3+
      14. Bxf3 c4 15. Qe2 a5 16. bxa6 Rxa6 17. Nb5 Rfa8 18. Qc2) (12... h6 13. a5 (
      13. g3 Qe6 14. a5 bxa5 15. Rxa5 Qh3 16. Re1 Nb6 17. Bf1 Qg4 18. Bg2) (13. d4
      Rfc8 14. dxc5 Nxc5 15. Rc1 Qd7 16. Nd4 Rc7 17. g3 Re8 18. Nc6) 13... bxa5 14.
      Rxa5 Ne5 15. Ra4 Rfe8 16. d4 Nxf3+ 17. Bxf3 c4 18. Qc2) (12... d4 13. exd4 cxd4
      14. Ne4 Nxe4 15. dxe4 Bxe4 16. Nxd4 Rfe8 17. Nc6 Qe6 18. Bc4) 13. g3 (13. a5 d4
      14. exd4 bxa5 15. g3 Qd8 16. Qd2 cxd4 17. Nxd4 Ne5 18. Nf5) 13... Ne5 14. a5
      bxa5 15. Rxa5 d4 16. exd4 cxd4 17. Nxd4 Qd7 18. Ra4) (12. g3 Rfe8 (12... h6 13.
      a4 (13. Qc2 Rfe8 14. d4 a6 15. a4 c4 16. Nh4 g6 17. bxa6 Rxa6 18. Nb5) (13. d4
      Rfe8 14. Qc2 Qe6 15. Rab1 c4 16. Nh4 g6 17. Rfe1 Ne4 18. Nxe4) 13... Qe6 14. a5
      bxa5 15. Rxa5 Ne5 16. Nxe5 Bxe5 17. Bf3 Rfe8 18. Ra4) (12... Qe6 13. Ng5 (13.
      a4 Rfe8 14. d4 Qh3 15. dxc5 bxc5 16. Ng5 Qf5 17. h4 h6 18. Bd3) 13... Qe8 14.
      d4 c4 15. Nh3 Qe6 16. Nf4 Qf5 17. Bf3 Rfe8 18. a4) (12... g6 13. a4 (13. Qa4
      Kg7 14. Rfe1 a5 15. Qc2 Rfe8 16. Na4 Kg8 17. Rac1 Rac8 18. Qd2) (13. Qd2 Rad8
      14. Rac1 Rfe8 15. Rfe1 Ne5 16. Na4 Nxf3+ 17. Bxf3 Qe6 18. Qd1) (13. Re1 Rfd8
      14. Qc2 Re8 15. Rad1 a6 16. Ra1 a5 17. Qa4 Kg7 18. Rac1) (13. Qb3 Rfc8 14. Qc2
      Ne5 15. Rfe1 c4 16. d4 Nxf3+ 17. Bxf3 a6 18. Na4) 13... Rfe8 14. a5 bxa5 15.
      Rxa5 Bc7 16. Ra4 Ne5 17. Ba3 Bb6 18. d4) 13. Qd2 (13. Re1 h6 14. Bf1 a6 15. Bg2
      Rec8 16. bxa6 Bxa6 17. a4 c4 18. e4) (13. Qc2 Ne5 14. d4 Nxf3+ 15. Bxf3 cxd4
      16. exd4 Qe6 17. Rac1 Rac8 18. Qa4) (13. d4 c4 14. Nd2 h6 15. Qc2 Nf8 16. Rfe1
      Ne6 17. Nf3 Ng5 18. Nxg5) (13. Qb3 h6 14. Qc2 Ne5 15. d4 Nc4 16. Nh4 Qe6 17.
      Nf5 Bf8 18. dxc5) 13... h6 14. d4 c4 15. Nh4 g6 16. a4 a5 17. bxa6 Rxa6 18. Qc2
      ) (12. Qd2 Rfe8 (12... h6 13. a4 (13. Rfe1 Rfe8 14. a4 d4 15. exd4 cxd4 16. Na2
      Nh5 17. Bd1 Qf6 18. Bxd4) (13. g3 Rfe8 14. Qc2 Ne5 15. d4 Nc4 16. Nh4 Nxb2 17.
      Nf5 Qd7 18. Nxd6) (13. h3 Rfe8 14. Rfc1 Qe6 15. Re1 Rac8 16. Rac1 Re7 17. d4 c4
      18. Qc2) (13. Rfc1 Rfe8 14. h3 Qe6 15. Re1 Rac8 16. Rac1 Re7 17. d4 c4 18. Qc2)
      13... d4 14. exd4 cxd4 15. Ne4 Bb4 16. Qf4 Nxe4 17. dxe4 Bc3 18. Ba3) (12...
      Rae8 13. g3 (13. d4 Ne4 14. Qc2 Ndf6 15. Nxe4 Nxe4 16. dxc5 bxc5 17. g3 Qd7 18.
      Rad1) (13. h3 d4 14. exd4 cxd4 15. Ne4 Bb4 16. Qc2 Nxe4 17. dxe4 Nc5 18. Nxd4)
      13... h6 14. Qd1 Qe6 15. d4 c4 16. Qc2 Qh3 17. Nh4 Ng4 18. Bxg4) (12... Rad8
      13. g3 (13. h3 Rfe8 14. Rae1 h6 15. Nh4 Qe6 16. Nf3 Rc8 17. Bd1 Ne5 18. Nxe5) (
      13. Rfe1 Rfe8 14. g3 h6 15. Qc2 Qe6 16. d4 c4 17. Nh4 g6 18. Rad1) (13. Rfc1 h6
      14. a4 d4 15. exd4 cxd4 16. Ne4 Nxe4 17. dxe4 Nc5 18. Nxd4) (13. Rac1 h6 14. h3
      Rfe8 15. d4 Ne4 16. Qc2 Ndf6 17. Qa4 Ra8 18. Nxe4) 13... h6 14. a4 Ne5 15. Rfe1
      d4 16. exd4 cxd4 17. Nxd4 Qd7 18. Ne4) 13. g3 (13. h3 h6 14. Rfc1 Qe6 15. d4 a6
      16. dxc5 bxc5 17. a4 Ne5 18. Nxe5) (13. Rfd1 h6 14. h3 Qe6 15. Re1 Ne5 16. Na4
      Qd7 17. Rab1 Nxf3+ 18. Bxf3) (13. Rfc1 h6 14. h3 Qe6 15. d4 c4 16. a4 a6 17.
      bxa6 Rxa6 18. Ba3) (13. Rab1 d4 14. exd4 cxd4 15. Ne4 Bxe4 16. dxe4 Nxe4 17.
      Qxd4 Ndf6 18. Rbe1) 13... h6 14. Qc2 Ne5 15. Na4 Qd7 16. Bxe5 Bxe5 17. Nxe5
      Rxe5 18. d4) (12. h3 h6 (12... Qe6 13. d4 (13. Qc2 d4 14. exd4 cxd4 15. Ne4
      Rac8 16. Qa4 Nxe4 17. dxe4 Qxe4 18. Qxd4) (13. a4 h6 14. a5 Ne5 15. a6 Bc8 16.
      Ra4 Bd7 17. d4 Nxf3+ 18. Bxf3) (13. Ng5 Qf5 14. f4 Qg6 15. h4 Qh6 16. Qe1 Rfe8
      17. Qf2 d4 18. exd4) 13... a6 14. Qc2 h6 15. dxc5 bxc5 16. a4 d4 17. exd4 cxd4
      18. Nb1) (12... Ne5 13. d4 (13. Na4 Rfe8 14. Bxe5 Bxe5 15. Nxe5 Qxe5 16. Bf3
      Qc7 17. Qd2 a6 18. bxa6) (13. Qd2 Nxf3+ 14. Bxf3 Qe5 15. g3 Qe6 16. Bg2 Rfe8
      17. a4 Qd7 18. Ne2) (13. Re1 Rfe8 14. Na4 Ned7 15. Qc2 h6 16. d4 c4 17. Nc3 Ne4
      18. Nxe4) (13. Qc2 Nxf3+ 14. Bxf3 Qe5 15. g3 Qe6 16. Kg2 Rfe8 17. Ne2 a6 18.
      bxa6) 13... Nxf3+ 14. Bxf3 c4 15. Qc2 h6 16. a4 a5 17. bxa6 Rxa6 18. Nb5) (
      12... Rfe8 13. Qd2 (13. Qa4 a6 14. bxa6 Rxa6 15. Qd1 Ra5 16. Re1 h6 17. a4 Bc6
      18. Nb5) (13. Rc1 h6 14. Qc2 a6 15. bxa6 Bxa6 16. a4 Qe6 17. Ra1 d4 18. exd4) (
      13. d4 c4 14. Nd2 a6 15. Bf3 Bb4 16. bxa6 Rxa6 17. Qc2 Nf8 18. a3) (13. a4 d4
      14. exd4 cxd4 15. Ne4 Nxe4 16. dxe4 Rad8 17. Qxd4 Nf6 18. e5) 13... h6 14. a4
      Ne5 15. Rfe1 Qd7 16. Nxe5 Rxe5 17. Bf3 Rf5 18. Ne2) 13. d4 (13. a4 Ne5 14. a5
      bxa5 15. Rxa5 Nxf3+ 16. Bxf3 Bh2+ 17. Kh1 Bc7 18. Ra4) (13. Re1 Rfe8 14. Qc1
      Ne5 15. d4 Nxf3+ 16. Bxf3 c4 17. Qc2 a5 18. Rec1) 13... Rfe8 14. Qc2 c4 15. a4
      Ne4 16. Nxe4 Qxe4 17. Qxe4 Rxe4 18. a5) 12... Rad8 (12... c4 13. Qc2 $11 (13.
      Nd2 a6 14. Bf3 Rfc8 15. Qc2 axb5 16. Nxb5 Bb4 17. Bc3 Bxc3 18. Nxc3) (13. g3 a6
      14. Qc2 Ne4 15. a4 axb5 16. Nxb5 Bb4 17. Bc3 Bxc3 18. Nxc3) (13. a4 a5 14. Qc2
      Rac8 15. Nd2 Rfe8 16. h3 Nf8 17. Nf3 Ng6 18. Ra2) (13. h3 a6 14. Nd2 h6 15. Bf3
      Rfc8 16. Qc2 Bb4 17. a3 Bxc3 18. bxa6) 13... a6 14. a4 axb5 15. Nxb5 Bb4 16.
      Bc3 Ne4 17. Bxb4 Qxb4 18. Rfb1) (12... h6 13. Qc2 (13. g3 c4 14. Nh4 g6 15. Qc2
      Rfc8 16. Nf3 Ne4 17. Rfd1 a6 18. a4) (13. a4 c4 14. Qc2 a6 15. Nd2 Rfc8 16. Bf3
      Bb4 17. Qf5 Qe6 18. Qc2) (13. dxc5 bxc5 14. h3 Qe6 15. Qc2 Ne5 16. Rfe1 Rfe8
      17. Na4 Nc4 18. Bxf6) (13. h3 c4 14. Qc2 a6 15. a4 a5 16. Nh4 g6 17. Nf3 Rfe8
      18. Nd2) 13... a6 14. g3 c4 15. Nh4 g6 16. bxa6 Rxa6 17. Nb5 Bb8 18. a4) 13.
      Bd3 (13. Qa4 Ra8 14. Qd1 c4 15. Qc2 a6 16. a4 axb5 17. Nxb5 Bb4 18. Bc3) (13.
      dxc5 bxc5 14. Qa4 Ra8 15. h3 h6 16. Rfd1 Qe6 17. Qc2 Rfe8 18. Rab1) 13... Ne4 (
      13... c4 14. Be2 a6 15. bxa6 Bxa6 16. a4 h6 17. Qc2 Bb7 18. Nh4) 14. Bxe4 (14.
      Qa4 $5 $11 Ra8 15. dxc5 bxc5 16. Rad1 f5 17. Qc2 Ndf6 18. Be2) (14. h3 f5 15.
      Qa4 Ra8 16. dxc5 Ndxc5 17. Qd1 Rad8 18. Rc1) 14... dxe4 $17 15. Nd2 Qh4 (15...
      cxd4 16. exd4 Bf4 17. Ne2 Bb8 18. Ng3) 16. f4 $2 (16. g3 $142 Qe7 (16... Qh3
      17. d5 Ne5 18. f3) 17. Qa4 $15 (17. Ba3 Rfe8 18. Nc4) 17... cxd4 18. exd4)
      16... exf3 $19 17. Nxf3 Bxf3 18. Rxf3 Bxh2+ 19. Kf1 Bg3 20. Ke2 (20. Ne2 Qh1+
      21. Ng1 Bh2 $19) 20... cxd4 (20... Ne5 $5 21. Ne4 Nxf3 22. Kxf3 $19) 21. Qxd4
      Ne5 $4 (21... Qh2 $142 22. Ne4 Ne5 23. Rxg3 Rxd4 24. Bxd4 Qh4 $19) 22. Qxh4 $17
      Bxh4 23. Rh3 Be7 24. Ne4 Rd5 25. a4 f5 26. Nd2 Rfd8 27. Bd4 f4 $1 28. Nb3 (28.
      exf4 Rxd4 {Double attack} (28... Rxd4 {Deflection}) (28... Rxd4 {Decoy})) 28...
      fxe3 29. Rxe3 Ng6 30. Re4 Bg5 31. g3 Ne7 (31... Bf6 32. Bxf6 gxf6 33. Rc1 $17)
      32. g4 $15 Ng6 33. Rf1 h6 34. Rf3 Rc8 35. Kf1 (35. Kd3 Nh4 36. Rf2 Bf6 $15)
      35... Nh4 (35... Rc4 36. Rc3 Rxa4 37. Rc7 $19) 36. Rf2 (36. Rc3 Rxc3 37. Bxc3
      Rd3 $17) 36... Rd7 (36... Rc4 37. Re8+ Kh7 38. Re4 $19) 37. Rfe2 Nf3 (37... Rc4
      $142 38. Bf2 Rd1+ 39. Be1 Rc3 $17) 38. Bb2 $2 (38. Kg2 $142 Rf8 39. Kg3 $17)
      38... Rd3 $19 39. Nd4 Nd2+ (39... Nd2+ 40. Rxd2 Rxd2 $19 (40... Bxd2 $6 41. Ke2
      Rxd4 42. Bxd4 $15)) 0-1
      
      [Event "Berlin Lichtenberger op 7th"]
      [Site "?"]
      [Date "2008.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Mohr, Horst"]
      [Result "0-1"]
      [WhiteElo "1980"]
      [PlyCount "56"]
      [EventDate "2008.??.??"]
      
      1. b4 e6 2. Bb2 Nf6 3. b5 d5 4. e3 Be7 5. Nf3 O-O 6. c4 c6 7. Nc3 a6 8. a4 Bd7
      (8... axb5 9. axb5 Rxa1 10. Bxa1 Qa5 11. Qa4 Qxa4 12. Nxa4 dxc4 13. Bxc4 cxb5
      14. Bxb5 Bd7 15. Bxd7 Nbxd7 16. O-O b5 17. Nb2 Ra8 18. Nd4 Nc5 19. Nd3 Nxd3 20.
      Nxb5 Ra2 21. Rd1 Ne4 22. Nc3 Nexf2 23. Nxa2 {
      Hasler,U (1990)-Barkwell,M (2120)/corr ICCF World Cup XII P074 2000/0-1 (38)})
      9. d4 $146 (9. Ne5 axb5 10. Nxd7 Qxd7 11. cxb5 c5 12. Ba3 b6 13. d4 cxd4 14.
      Bxe7 Qxe7 15. Qxd4 Nbd7 16. Be2 e5 17. Nxd5 Nxd5 18. Qxd5 Rfd8 19. O-O Kh8 20.
      Bf3 Rac8 21. Rac1 Nc5 22. Qa2 e4 23. Bh5 g6 {
      ariank-ccarreno/kurnik 2011/1/2-1/2 (78)}) (9. Be2 dxc4 10. Bxc4 (10. bxa6 Nxa6
      11. Bxc4 Qc7 12. O-O Ra7 13. Qc2 Nb4 14. Qb3 Nbd5 15. Nxd5 exd5 16. Be2 Rfa8
      17. Be5 Qc8 18. Rfc1 Ne4 19. Bd4 c5 20. Bb5 Bxb5 21. axb5 Rxa1 22. Bxa1 c4 23.
      Qb1 Ra3 24. Qb2 f6 {Lehr,T-Weidmann,J/Koblenz 1999}) 10... cxb5 11. axb5 Qc7
      12. Qb3 Rc8 13. Be2 b6 14. bxa6 Nc6 15. O-O Na5 16. Qa2 Bc6 17. d4 Ne4 18. Nxe4
      Bxe4 19. Ne5 Qd6 20. Ba3 Qd8 21. Bxe7 Qxe7 22. f3 Bd5 23. Qb2 f6 {
      brother-rockybaluboa/6645771 kurnik 2012/1-0 (32)}) (9. cxd5 Nxd5 10. bxa6 Nxa6
      11. Be2 Bf6 12. Nxd5 exd5 13. d4 Qa5+ 14. Qd2 Qxd2+ 15. Kxd2 Be7 16. Bc3 Rfb8
      17. Ne5 Be8 18. Rhb1 f6 19. Nd3 Nc7 20. Bb4 Kf7 21. f3 Ne6 22. f4 g6 23. h4 h6
      {Zylla,J-Haugwitz/BS-MK Kreisliga 1993/1/2-1/2 (50)}) 9... axb5 10. axb5 Rxa1
      11. Qxa1 dxc4 12. Bxc4 Qb6 13. Ne5 cxb5 14. Nxd7 Nbxd7 15. Bxb5 Rc8 16. O-O (
      16. Qa4 $142 $11) 16... Rxc3 $1 $17 17. Bxd7 (17. Bxc3 Qxb5 {Remove defender})
      17... Rb3 $19 18. Qa8+ Bf8 19. Bxe6 Rxb2 20. Bh3 Qa6 21. Qc8 Ra2 22. g3 b5 23.
      Qf5 b4 24. e4 g6 25. Qf3 Ra3 26. Qd1 (26. Qf4 $19) 26... Nxe4 27. Bg2 Nc3 28.
      Qg4 (28. Qd2 $19) 28... b3 0-1
      
      [Event "6th Berlin-ch Seniors"]
      [Site "?"]
      [Date "2010.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Alder, Bodo"]
      [Result "0-1"]
      [WhiteElo "1725"]
      [BlackElo "2005"]
      [PlyCount "40"]
      [EventDate "2010.??.??"]
      
      1. b4 Nf6 2. Bb2 e6 3. b5 d5 4. e3 Be7 5. Nf3 O-O 6. c4 c6 7. a4 Nbd7 8. Nc3
      Bd6 $146 (8... cxb5 9. axb5 dxc4 10. Bxc4 b6 11. Be2 Bb7 12. O-O Nc5 13. Nd4 e5
      14. Bf3 Bxf3 15. Nxf3 e4 16. Nd4 Nd3 17. Qc2 Rc8 18. Qb1 Nd5 19. Nxe4 Nxb2 20.
      Qxb2 Bf6 21. Nxf6+ Qxf6 22. Qb3 Rcd8 23. Rxa7 {
      chybol3-ivogavrilov/kurnik 2013/0-1 (39)}) (8... e5 9. Be2 e4 10. Nd4 c5 11.
      Nf5 Nb6 12. Nxe7+ Qxe7 13. cxd5 Nbxd5 14. Bc4 Nb4 15. O-O b6 16. Ba3 Bg4 17.
      Qc2 Nxc2 18. Ra2 Nb4 19. Bxb4 cxb4 20. Nd5 Nxd5 21. Bxd5 Be6 22. Bxe4 Bxa2 23.
      Bxa8 {hen4daleko-awn/kurnik 2014/0-1}) (8... e5 9. cxd5 cxd5 10. Rc1 $11) 9.
      Be2 Re8 (9... dxc4 10. O-O $11) 10. O-O e5 11. bxc6 bxc6 12. cxd5 cxd5 13. Nb5
      Bb8 14. Ba3 e4 (14... a6 15. Nd6 Bxd6 16. Bxd6 $15) 15. Nh4 (15. Nfd4 Ne5 $11)
      15... Ne5 16. d4 (16. Rc1 Nc4 17. Bxc4 dxc4 18. Rxc4 a6 $15) 16... exd3 $17 17.
      Bxd3 Nfg4 18. Nf3 $4 (18. g3 $142 $17) 18... Nxf3+ 19. Qxf3 Bxh2+ 20. Kh1 Qh4 (
      20... Qh4 21. Qh3 Nxf2+ 22. Kxh2 Bxh3 (22... Qxh3+ $6 23. gxh3 Nxd3 24. Nc7
      Bxh3 25. Rfb1 $17) 23. Rxf2 Qxf2 $19) 0-1
      
      [Event "2rd Berlin Germany, Lichtenberger Somme"]
      [Site "?"]
      [Date "2013.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Baranowsky, Peter"]
      [Result "0-1"]
      [WhiteElo "1910"]
      [BlackElo "1965"]
      [PlyCount "68"]
      [EventDate "2013.??.??"]
      
      1. b4 Nf6 2. Bb2 e6 3. b5 d5 4. e3 Be7 5. Nf3 O-O 6. c4 c6 7. a4 Bd6 $146 (7...
      Ne4 8. Nc3 Bf6 (8... f5 9. Qc2 Nd7 10. h3 Bb4 11. Nxe4 fxe4 12. Nh2 Qe7 13. Be2
      Nf6 14. O-O e5 15. f3 Bd7 16. f4 exf4 17. Rxf4 Bd6 18. Rff1 Bc7 19. Rf2 Qd6 20.
      g4 Qg3+ 21. Rg2 Qxh3 22. cxd5 Nxd5 23. Qxe4 {
      zabazaba (1650)-interpetude (1810)/gameknot.com 2013/0-1 (44)}) 9. Qc2 cxb5 10.
      axb5 Nxc3 11. Bxc3 Bxc3 12. dxc3 Nd7 13. cxd5 exd5 14. Bd3 Nf6 15. Nd4 Re8 16.
      O-O h6 17. Rfb1 Qb6 18. Rb4 Bd7 19. Rba4 Ne4 20. R4a3 Nc5 21. Be2 Ne4 22. Qa2 {
      Trokenheim,M-Schulz,H/TT-12 2004/1/2-1/2 (63)}) (7... h6 8. Nc3 Bd7 9. Be2 dxc4
      10. Bxc4 cxb5 11. axb5 b6 12. O-O Bc8 13. Nd4 Bb7 14. Bxe6 fxe6 15. Nxe6 Qd3
      16. Nxf8 Bxf8 17. Qb3+ Kh8 18. Rfd1 Qg6 19. g3 Bf3 20. Re1 Qh5 21. Ne2 Bxe2 22.
      Rxe2 {elsh1403-jaro6519/kurnik 2011/0-1}) (7... Nbd7 8. d4 $15) 8. Be2 (8. d4
      b6 $11) 8... Nbd7 (8... dxc4 9. Na3 $11) 9. d4 dxc4 10. Nbd2 (10. Bxc4 cxb5 11.
      axb5 Nb6 $11) 10... Bb4 (10... cxb5 11. axb5 Nb6 12. Nxc4 Nxc4 13. Bxc4 Bb4+
      14. Kf1 $11) 11. Bxc4 $11 Nb6 12. Bd3 cxb5 13. axb5 a5 (13... Nbd5 14. O-O $14)
      14. bxa6 bxa6 15. O-O Bb7 16. Qe2 (16. Ba3 Nbd5 $11) 16... a5 17. Rfc1 Qe7 18.
      Nb3 (18. Ne5 a4 $11) 18... a4 (18... Rfc8 19. Rxc8+ Nxc8 20. Rc1 $11) 19. Nc5
      a3 (19... Rfc8 20. Nxb7 Qxb7 21. Rcb1 $11) 20. Bc3 $14 Bxf3 21. gxf3 (21. Qxf3
      Nbd5 22. Bxb4 Nxb4 $11) 21... Nfd5 (21... Nbd5 22. Bxb4 Nxb4 23. f4 $11) 22.
      Bxb4 $11 Nxb4 23. Be4 Ra7 (23... N6d5 24. f4 $11) 24. f4 f5 25. Bg2 N6d5 26.
      Qc4 (26. Qd2 Rb8 $14) 26... Rb8 27. Rcb1 Qd6 (27... a2 28. Rxa2 Rxa2 29. Bxd5
      exd5 30. Qxa2 Nxa2 31. Rxb8+ Kf7 32. Rb7 $16) 28. Rb3 (28. Nxe6 a2 29. Rb2 Kf7
      30. Bxd5 Nxd5 31. Rxb8 Qxb8 32. Qxd5 Qb1+ 33. Kg2 Qxa1 34. Ng5+ Ke8 35. Qg8+
      Kd7 36. Qxg7+ Kc8 37. Qxa7 Qb1 $16) 28... a2 $14 29. Qc1 (29. Nxe6 Nb6 30. Qxb4
      Qxe6 $16) 29... Kf7 (29... Nc7 30. Qb2 Nca6 31. Ra3 $16) 30. Qb2 (30. Qd2 Qc7
      $14) 30... Qb6 31. Bf1 Qd6 (31... Qa5 32. Bc4 $14) 32. Bc4 $16 Qb6 33. Nd3 $4 (
      33. Qe2 $142 $16) 33... Nxd3 $19 34. Bxd3 (34. Qd2 Qxb3 35. Bxb3 Rxb3 36. Rxa2
      Rb1+ 37. Kg2 Rxa2 38. Qxa2 $19) 34... Qxb3 (34... Qxb3 35. Qe2 Ra3 $19) 0-1
      
      [Event "2rd Berlin Germany, Lichtenberger Somme"]
      [Site "?"]
      [Date "2013.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Jiranek, Benno"]
      [Result "1/2-1/2"]
      [WhiteElo "1910"]
      [PlyCount "70"]
      [EventDate "2013.??.??"]
      
      1. b4 Nf6 2. Bb2 d5 3. e3 e5 4. a3 Bd6 5. c4 dxc4 6. Bxc4 a6 (6... e4 7. d3 O-O
      8. Nd2 exd3 9. Bxd3 a5 10. bxa5 Rxa5 11. Ngf3 Bxh2 12. Qc2 Rd5 13. Bxf6 Qxf6
      14. Bxh7+ Kh8 15. Rxh2 Rxd2 16. Bg8+ {
      1-0 Luzuriaga,N (2440)-Sofia,G (2035)/Liape ch-1 zone-A gr-07 email 2002}) 7.
      Nf3 (7. Qc2 O-O 8. Nf3 Nc6 9. Ng5 h6 10. h4 Qe7 11. Nc3 Nd8 12. Nd5 {
      1-0 combijack (1795)-arnepetersen (1690)/gameknot.com 2012}) 7... Bg4 $146 (
      7... Qe7 8. O-O O-O 9. d4 exd4 10. Qxd4 Nc6 11. Qh4 Nd7 12. Qh5 Nf6 13. Qg5 Be6
      14. Bd3 h6 15. Qh4 Nd5 16. Nbd2 Qxh4 17. Nxh4 Be5 18. Rab1 Bxb2 19. Rxb2 Rad8
      20. Ne4 Nxe3 21. fxe3 Rxd3 22. Nc5 {
      Nemes,Z (2150)-Leviczki,T/Debrecen Kinizsi Cup 4th 1997/1/2-1/2 (60)}) (7... b5
      8. Bb3 e4 9. Nd4 $11) 8. Qb3 (8. h3 $5 Bxf3 9. Qxf3 $11 (9. gxf3 $143 O-O $15))
      8... Qe7 $15 9. Ng5 Be6 (9... O-O $142 $15) 10. Nxe6 $16 fxe6 11. Bxe6 Nbd7 12.
      Nc3 c6 (12... a5 13. O-O $16) 13. Ne2 (13. d3 a5 14. O-O Rd8 $16) 13... Rf8 (
      13... e4 14. O-O $16) 14. Ng3 g6 15. O-O (15. d3 Nd5 16. Bxd5 cxd5 17. Qxd5
      Bxb4+ 18. Ke2 Bc5 $16) 15... b6 (15... e4 16. Rad1 $16) 16. Rac1 (16. d3 c5 $18
      ) 16... c5 17. Bxd7+ (17. Bc3 cxb4 18. axb4 h5 $18) 17... Nxd7 18. Ne4 Rc8 (
      18... Rd8 19. d4 cxb4 20. Rc6 $18) 19. Qd5 (19. Qd3 Bb8 $18) 19... Bc7 (19...
      Bb8 20. Qa8 $18) 20. bxc5 bxc5 21. Nxc5 e4 $2 (21... Nxc5 22. Rxc5 Rd8 23. Qc6+
      Rd7 24. Rfc1 $18) 22. Qxd7+ (22. Ne6 Bxh2+ 23. Kxh2 Rxc1 24. Bxc1 $18 (24. Rxc1
      $6 Qh4+ 25. Kg1 Qxf2+ 26. Kh2 Qh4+ 27. Kg1 Qf2+ 28. Kh1 Qh4+ 29. Kg1 Qf2+ $11))
      22... Qxd7 23. Nxd7 Kxd7 24. Rc4 $4 (24. f3 $142 exf3 25. Rxf3 Rxf3 26. gxf3
      $18) 24... Bxh2+ $17 25. Kxh2 Rxc4 26. Bc3 Rfc8 (26... Ra4 27. Kg3 $17) 27. Kg3
      Ra4 28. Rh1 (28. f3 exf3 29. Rxf3 Rxa3 30. Rf7+ Ke6 31. Rxh7 Rc6 $15) 28... h5
      (28... Rxa3 $6 29. Rxh7+ Ke6 30. Rg7 $11) 29. Rb1 Rxa3 30. Rb7+ Ke8 (30... Ke6
      31. Rg7 $17) 31. Rb4 Kd7 (31... a5 32. Rxe4+ Kd7 33. Rd4+ Ke6 34. Re4+ Kd6 35.
      Rd4+ Kc5 36. Kh4 $15) 32. Rxe4 (32. Rb7+ Ke6 33. Rg7 $17) 32... Rc6 (32... a5
      33. Rd4+ Ke6 34. Rf4 $17) 33. Re5 (33. Rd4+ Ke8 $15) 33... Ra4 (33... Re6 34.
      Rc5 $15) 34. f4 Rb6 35. Rd5+ Kc6 1/2-1/2
      
      [Event "Lichtenberger Sommer"]
      [Site "?"]
      [Date "2015.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Janse, Alexander"]
      [Result "0-1"]
      [WhiteElo "1860"]
      [BlackElo "1880"]
      [PlyCount "105"]
      [EventDate "2015.??.??"]
      
      1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. Nc3 Ba5 5. e3 d6 6. Bxf6 (6. Bg3 Nbd7 7.
      Bd3 Bxc3 8. dxc3 O-O 9. Nf3 Qe8 10. Nd4 Nc5 11. O-O Nfe4 12. Qh5 Bd7 13. c4 f5
      14. Qxe8 Raxe8 15. Rfe1 g6 16. Nb3 Na4 17. Bf4 g5 18. Bxe4 Rxe4 19. Bxg5 Rxc4
      20. Nd4 f4 {Winiger,A (2340)-Taulien,H (2350)/RSX5D - X-Mas 2005/1/2-1/2 (38)})
      6... Qxf6 7. Nge2 $146 (7. Ne4 Qe7 8. Bd3 Nc6 (8... Nd7 9. Nf3 O-O 10. O-O g6
      11. Rb1 f5 12. Bc4+ Kg7 13. Ng3 c6 14. Be2 Bc7 15. c4 Ne5 16. d4 Nxf3+ 17. Bxf3
      Kg8 18. Ne2 Bb6 19. g3 Rd8 20. a4 c5 21. Nf4 cxd4 22. Bd5+ Kg7 23. exd4 {
      mikleol (2225)-libelle_3 (1895)/gameknot.com 2015/1-0 (43)}) 9. Ne2 O-O 10. O-O
      Ne5 11. Rb1 Nxd3 12. cxd3 d5 13. N4g3 c6 14. Qc2 g6 15. h3 Rb8 16. Qa4 Bb6 17.
      f4 Qd6 18. f5 Bd7 19. Qh4 Bd8 20. f6 b5 21. d4 Re8 {
      urdukan (2320)-didaktikm123 (2120)/gameknot.com 2015/1-0 (34)}) 7... O-O 8. Rb1
      c6 9. g3 Nd7 10. Bg2 Ne5 11. O-O Qh6 12. f3 Nc4 13. Qc1 Re8 14. f4 d5 15. e4
      dxe4 16. Bxe4 Bg4 17. Bf3 Bxf3 18. Rxf3 Qh5 19. Kg2 Rad8 20. d3 Nd6 21. Rb3 (
      21. Qf1 $142 $5 $19) 21... b5 22. Re3 $6 (22. Qa3 Bb6 23. h3 $19) 22... b4 23.
      Ne4 Nxe4 (23... Bb6 $142 24. f5 a5 $19) 24. dxe4 Bb6 25. Rf3 $4 (25. Rxb4 $142
      Bxe3 26. Qxe3 $19) 25... Rxe4 26. Ng1 (26. Rbe3 Rxe3 27. Rxe3 Qd5+ 28. Kh3 Bxe3
      29. Qxe3 Qxa2 30. Nd4 $19) 26... Bxg1 27. Kxg1 Rde8 (27... Re2 $142 28. Rf2
      Rde8 $19) 28. Rbe3 Qc5 29. Kf2 Kf8 30. Qd2 Rxe3 31. Rxe3 Qxe3+ 32. Qxe3 Rxe3
      33. Kxe3 Ke7 34. Kd4 Kd6 35. Kc4 a5 36. Kd4 c5+ 37. Kc4 Kc6 38. g4 (38. c3 f5
      $19) 38... g6 39. g5 a4 40. h3 Kd6 (40... Kb6 $142 $19) 41. Kb5 $15 a3 42. Kc4
      Kc6 43. c3 $4 (43. h4 $142 $15) 43... bxc3 $19 44. Kxc3 Kd5 45. Kb3 (45. Kd3
      c4+ 46. Ke3 Ke6 $19) 45... Kd4 46. Kxa3 (46. Kc2 Ke3 47. h4 Kxf4 48. Kb3 $19)
      46... Kc3 47. Ka4 c4 48. Kb5 Kd3 49. a4 c3 50. a5 c2 51. a6 c1=Q 52. a7 Qc8 53.
      Kb6 0-1
      
      [Event "2rd Berlin Germany, Lichtenberger Somme"]
      [Site "?"]
      [Date "2013.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Kuehnemund, Lutz"]
      [Result "1/2-1/2"]
      [WhiteElo "1910"]
      [BlackElo "2040"]
      [PlyCount "31"]
      [EventDate "2013.??.??"]
      
      1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. Nc3 Nc6 5. Bxf6 Qxf6 6. Nd5 Qd6 7. Nxb4
      Qxb4 8. c3 Qe7 (8... Qa5 9. e3 O-O 10. Qc2 Re8 11. Rb1 b6 12. Rb5 Qa3 13. Nf3
      d5 14. Rxd5 Be6 15. Rh5 g6 16. Bb5 gxh5 17. Bxc6 Qxa2 18. Qxa2 Bxa2 19. d3 Be6
      20. Kd2 a5 21. Ra1 Reb8 22. Bxa8 Rxa8 23. c4 {
      zoltanln (2735)-cgits (2780)/net-chess.com 2007/1-0 (71)}) 9. e3 O-O (9... d5
      10. Nf3 Bg4 11. Bb5 O-O 12. Bxc6 bxc6 13. h3 Bh5 {
      0-1 libelle_3 (1865)-phildo (1920)/gameknot.com 2015}) 10. Nf3 d6 11. d4 $146 (
      11. Be2 Bf5 12. O-O Rfe8 13. Qb3 Rab8 14. d4 a6 15. a4 Qf6 16. Rfe1 h6 17. c4
      a5 18. Qb5 Nb4 19. Qxa5 Nc2 20. Qxc7 Nxe1 21. Nxe1 Qd8 22. Qxd8 Rexd8 23. Bf3
      b6 24. a5 bxa5 25. Rxa5 Rb1 {Mentz,B-Wiemers,H/Muenster 1987/1/2-1/2}) (11. Qc2
      Bg4 12. Be2 Bh5 13. d4 Bg6 14. Bd3 Nd8 15. Bxg6 hxg6 16. O-O f5 17. g3 Ne6 18.
      c4 b6 19. a4 a5 20. Rab1 Ng5 21. Nh4 Kf7 22. Kg2 Ne4 23. f3 Nf6 24. Rbe1 Qd7
      25. e4 f4 {lendzior (1740)-scacchis (1740)/kurnik 2013/1-0 (38)}) 11... Bf5 12.
      Bd3 Bxd3 13. Qxd3 Rfe8 (13... Rfd8 14. Rb1 Rab8 15. O-O $11) 14. O-O Qe4 15.
      Qxe4 Rxe4 16. Nd2 1/2-1/2
      
      [Event "6th Berlin-ch Seniors"]
      [Site "?"]
      [Date "2010.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Glatthor, Thomas"]
      [Result "1/2-1/2"]
      [WhiteElo "1725"]
      [BlackElo "1960"]
      [PlyCount "56"]
      [EventDate "2010.??.??"]
      
      1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. Nc3 Nc6 5. Bxf6 Qxf6 6. Nd5 Qe5 7. Nxb4
      Nxb4 8. Rb1 a5 9. e3 $146 (9. a3 Nc6 10. Nf3 Qe7 11. Qc1 O-O (11... b6 12. e3
      Ne5 13. Nxe5 Qxe5 14. d4 Qg5 15. Rb5 Qg6 16. Bd3 Qc6 17. c4 d6 18. Qc2 Bb7 19.
      f3 Qd7 20. Be4 Rb8 21. Bxb7 Rxb7 22. Qe4+ Qe7 23. Qc6+ Kd8 24. Qxb7 Qxe3+ 25.
      Kf1 Qd3+ 26. Kf2 {
      Sipila,V (2345)-Saemundsson,B (1920)/MP Reykjavik Open 2011/1-0}) 12. e3 d5 13.
      Qb2 b6 14. Bb5 Qd6 15. O-O f6 16. c4 Be6 17. d4 Ne7 18. cxd5 Bxd5 19. Nd2 f5
      20. Rfc1 Kh8 21. Qc3 Rfc8 22. Nc4 Qg6 23. g3 Qe6 {
      Baruch,D (2015)-Perkins,M (2130)/redhotpawn.com 2012/1-0 (49)}) (9. Nf3 Qe4 (
      9... Qe7 10. e3 d5 11. c3 Nc6 12. Rb5 Qa3 13. Qc2 Ne7 14. Bd3 c6 15. Rb6 h6 16.
      O-O O-O 17. Rfb1 Qd6 18. c4 dxc4 19. Bxc4 Nd5 20. Bxd5 Qxd5 21. e4 Qh5 22. d4
      Rd8 23. Qc3 Qg6 24. Re1 {Hirtreiter,M-Kordonowski/BdF 1988 (35)}) 10. Rb2 O-O
      11. Qb1 b6 12. c3 Qxb1+ 13. Rxb1 Nc2+ 14. Kd1 Na3 15. Rb3 Nc4 16. Nd4 Bb7 17.
      f3 a4 18. Rb1 Na3 19. Rb2 {1-0 marekt-emmasdad/ChessWorld.net 2015}) 9... Qe4
      10. Rb2 d5 (10... O-O 11. d4 $11) 11. a3 Nc6 12. Nf3 (12. d4 O-O $11) 12... Qg6
      (12... Qe7 13. Qa1 $11) 13. Bd3 (13. d4 O-O $11) 13... Qxg2 (13... Qd6 14. Rb3
      $11) 14. Rg1 $14 Qh3 15. Rxg7 Bg4 $2 (15... Qe6 16. Rg3 $14 (16. Bxh7 $4 Qf6
      17. d4 Qxg7 $19) (16. Rxh7 Rxh7 17. Bxh7 Qf6 $15)) 16. Be2 $4 (16. Ng1 $142
      Bxd1 17. Nxh3 $18) 16... O-O-O (16... Nd8 17. d4 $14) 17. Ng1 (17. Rxf7 $6 Qg2
      18. Bf1 Qh1 $15) 17... Bxe2 18. Nxh3 (18. Nxe2 $143 Ne5 19. Ng3 Qxh2 $17) (18.
      Qxe2 $6 Qxh2 19. Qb5 Qh5 20. Qxb7+ Kd7 $11) 18... Bxd1 19. Kxd1 d4 (19... Rdg8
      20. Rxf7 Ne5 21. Rf5 $16) 20. Rb5 f6 21. Rf5 Rhf8 (21... Ne5 22. Ke2 $16) 22.
      Rxh7 dxe3 23. fxe3 Ne5 (23... Rh8 $5 24. Rxh8 Rxh8 $16) 24. Nf4 $18 Rd6 (24...
      Rh8 25. Rxh8 Rxh8 26. h3 $18) 25. Ke2 b6 (25... Re8 26. d3 $18) 26. d3 Rd7 (
      26... Re8 27. h4 $18) 27. Rh6 Rd6 28. Rh7 Rd7 1/2-1/2
      
      [Event "Lichtenberger Sommer"]
      [Site "?"]
      [Date "2016.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Moeller, Dirk"]
      [Result "1-0"]
      [WhiteElo "1870"]
      [PlyCount "93"]
      [EventDate "2016.??.??"]
      
      1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. Nc3 Nc6 5. Bxf6 Qxf6 6. Nd5 Qe5 7. Nxb4
      Nxb4 8. Rb1 Qe7 (8... a5 9. a3 Nc6 10. Nf3 Qe7 11. Qc1 b6 (11... O-O 12. e3 d5
      13. Qb2 b6 14. Bb5 Qd6 15. O-O f6 16. c4 Be6 17. d4 Ne7 18. cxd5 Bxd5 19. Nd2
      f5 20. Rfc1 Kh8 21. Qc3 Rfc8 22. Nc4 Qg6 23. g3 Qe6 24. Ne5 Rd8 25. Bd3 Rdc8
      26. Rb5 {Baruch,D (2015)-Perkins,M (2130)/redhotpawn.com 2012/1-0 (49)}) 12. e3
      Ne5 13. Nxe5 Qxe5 14. d4 Qg5 15. Rb5 Qg6 16. Bd3 Qc6 17. c4 d6 18. Qc2 Bb7 19.
      f3 Qd7 20. Be4 Rb8 21. Bxb7 Rxb7 22. Qe4+ Qe7 23. Qc6+ {
      Sipila,V (2345)-Saemundsson,B (1920)/MP Reykjavik Open 2011/1-0}) 9. e3 d5 10.
      c3 Nc6 11. Nf3 $146 (11. Qb3 Bf5 12. Rb2 O-O 13. Nf3 Rad8 14. Bb5 Rd6 15. O-O
      Be4 16. Ne1 Qh4 17. f3 Rh6 18. Bxc6 Qxh2+ 19. Kf2 bxc6 20. d3 Bf5 21. e4 Qh4+
      22. Kg1 Qh2+ 23. Kf2 Be6 24. c4 Qe5 25. cxd5 cxd5 {
      Barbarickiy,Y-Savitskiy,S/-a Agaea. eia 2008/1/2-1/2 (66)}) (11. Qc2 d4 12.
      cxd4 Nxd4 13. Qa4+ Nc6 14. Nf3 O-O 15. Bc4 a6 16. O-O Na7 17. Bd3 Rd8 18. Qc2
      h6 19. Rfc1 Nc6 20. Be4 Rd6 21. d4 a5 22. a3 Ra6 23. Nd2 Rb6 24. Rxb6 cxb6 25.
      d5 Na7 {Dessing,B-Van der Raad,M/Groningen 2003/1-0 (37)}) (11. d4 Rb8 $11)
      11... a6 12. Bd3 (12. d4 Rb8 $11) 12... b5 (12... O-O 13. Qc2 f5 14. O-O $11)
      13. O-O (13. a4 bxa4 14. Qxa4 Bd7 $14) 13... Bg4 $11 14. Be2 O-O 15. d4 Rad8 (
      15... Bf5 16. Rb2 $11) 16. a4 $14 Bxf3 (16... Na7 17. axb5 Bxf3 18. Bxf3 Nxb5
      19. Ra1 $14) 17. Bxf3 b4 (17... Na7 $142 $5 $14) 18. c4 $1 $16 Qd6 (18... dxc4
      19. Bxc6 {Pinning} (19. Bxc6 {Deflection})) 19. Bxd5 Ne7 20. Bf3 a5 21. Qc2 {
      White intends c5} f5 22. c5 Qf6 (22... Qe6 $142 $5 $16) 23. Qc4+ $18 Kh8 (23...
      Rf7 $18) 24. Rfd1 (24. Qb5 $142 $5 f4 25. Qxa5 fxe3 26. fxe3 $18 (26. Rxb4 e2
      27. Bxe2 Nc6 $15)) 24... c6 (24... f4 25. e4 $16) 25. Rd2 (25. Qa6 Ra8 26. Qb7
      $16) 25... Ng6 (25... Rfe8 26. Qa6 Ra8 27. Qb7 $16) 26. Rbd1 (26. Qa6 $142 $5
      $18) 26... Nh4 $16 27. Be2 (27. Qe2 Rfe8 $16) 27... Rd5 $2 (27... f4 $142 28.
      exf4 Qxf4 $14) 28. g3 $18 Ng6 (28... f4 29. exf4 (29. gxh4 $6 fxe3 30. fxe3
      Qg6+ 31. Kh1 Qe4+ 32. Kg1 Qxe3+ 33. Kh1 Qe4+ 34. Kg1 Qg6+ 35. Kh1 Qe4+ 36. Kg1
      Qg6+ 37. Kh1 Qe4+ $11) 29... Nf5 30. Bf3 $18) 29. Bf1 (29. Qa6 Rb8 $18) 29...
      Qg5 $2 {Black prepares the advance f4} (29... Rdd8 $142 $16) 30. Bg2 $18 f4 (
      30... Rdd8 31. Qa6 $18) 31. Bxd5 (31. exf4 $142 $5 Qd8 $18) 31... cxd5 (31...
      fxe3 32. fxe3 cxd5 33. Qd3 $18) 32. Qe2 (32. Qd3 fxg3 33. hxg3 Nh4 $18) 32...
      f3 (32... fxg3 33. hxg3 Nh4 34. Rc2 Nf3+ 35. Kg2 $11) 33. Qf1 (33. Qb5 Qd8 $18)
      33... Qg4 34. Kh1 Rf5 (34... Ne7 35. Qb5 $18) 35. h3 (35. c6 Rf6 36. Rc1 Qc8
      $18) 35... Rh5 36. Kh2 Qd7 37. Rc1 Qc7 $2 (37... Ne7 38. Re1 $18) 38. c6 (38.
      Qa6 $142 Nf8 39. c6 $18) 38... Nh4 (38... Qc8 39. c7 Ne7 40. Rdc2 $18) 39. Rc5
      (39. Qa6 $142 h6 40. Qb7 Qxb7 41. cxb7 Ng6 $18) 39... Ng2 (39... Ng6 $18) 40.
      Qa6 h6 41. Qb7 (41. Qxa5 Qc8 42. h4 Nf4 $17) 41... Qd6 42. Qd7 (42. c7 $142 $5
      Qxc7 43. Rxc7 Rg5 $18) 42... Qg6 43. c7 Nh4 44. c8=Q+ Kh7 45. Qde8 (45. Qdd8
      Qf5 46. Qg8+ Kg6 47. Qce8+ Kf6 48. Qef7+ Kg5 49. Qfxg7+ Qg6 50. Rxd5+ Nf5 51.
      Qxg6#) 45... Qb1 46. Qg8+ Kg6 47. Qce6+ (47. Qce6+ Kg5 48. Qd8#) 1-0
      
      [Event "10th Lichtenberger Sommer"]
      [Site "?"]
      [Date "2011.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Frey, Matthias"]
      [Result "1/2-1/2"]
      [WhiteElo "1930"]
      [BlackElo "1945"]
      [PlyCount "54"]
      [EventDate "2011.??.??"]
      
      1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. Nc3 c6 5. a3 Be7 (5... Ba5 6. Bd6 Bc7 7.
      Bxc7 Qxc7 8. e3 d5 9. Nf3 O-O 10. Bd3 Nbd7 11. O-O Nc5 12. h3 Nce4 13. Qb1 Nxc3
      14. dxc3 Be6 15. Ng5 Rfe8 16. Qb3 Rad8 17. Rfd1 h6 {
      lasker (2250)-joraldo (1885)/chesshere.com 2008}) 6. e3 O-O 7. Nf3 d5 8. Be2
      $146 (8. Bd3 Nbd7 9. Bg3 Re8 (9... Nc5 10. O-O Nxd3 11. cxd3 Bg4 12. h3 Bh5 13.
      a4 Re8 14. Rc1 b6 15. Bf4 Ba3 16. Rc2 Qd7 17. d4 Qf5 18. Ra2 Be7 19. Rb2 Rac8
      20. Re1 Qe6 21. Qe2 Ne4 22. g4 Bg6 23. Ne5 Ba3 24. Rb3 {
      gtate (2620)-zoltanln/net-chess.com 2007/0-1 (53)}) 10. O-O Nc5 11. Be2 Nce4
      12. Nxe4 Nxe4 13. Be5 Bf6 14. Bxf6 Qxf6 15. Qe1 c5 16. d4 Bg4 17. c3 Rac8 18.
      Rb1 b6 19. Rc1 Qd6 20. a4 Bd7 21. Bb5 a5 22. Rb1 Re6 {
      Boehnke,H (2095)-Barth,G (2200)/remoteschach.de 2005 (31)}) 8... Nbd7 9. O-O
      Nxe5 10. Nxe5 Bxa3 (10... Bd6 $5 11. f4 Qe7 $17) 11. Nxc6 $11 bxc6 12. Rxa3 Qe7
      13. Qa1 Bf5 14. d3 Rfb8 15. Rb1 Rxb1+ 16. Nxb1 Rb8 17. Nd2 Rb7 18. Nf3 Bg4 19.
      h3 Bh5 20. Ra5 Qc7 21. Ra6 Bxf3 22. gxf3 Nd7 23. Qd4 h5 (23... Rb6 24. Rxb6
      Nxb6 25. c4 $15) 24. f4 $11 Nf6 25. Bf3 Rb6 26. Rxb6 axb6 (26... Qxb6 27. Qxb6
      axb6 28. e4 $11) 27. Qa4 (27. Qe5 $5 Qc8 28. Kg2 $14) 27... c5 1/2-1/2
      
      [Event "Lichtenberger Sommer"]
      [Site "?"]
      [Date "2016.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Andresen, Klaus"]
      [Result "1-0"]
      [WhiteElo "1870"]
      [PlyCount "37"]
      [EventDate "2016.??.??"]
      
      1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. Nc3 O-O 5. Bxf6 Qxf6 6. Nd5 Bxd2+ 7. Kxd2
      Qxf2 8. Nf3 (8. Kc1 Nc6 9. Nf3 Qc5 10. e4 Nb4 11. a3 Nxd5 12. Qxd5 Qe3+ 13. Kb2
      c6 14. Qd6 Qxe4 15. Bd3 Qd5 16. Bxh7+ Kxh7 17. Qxf8 d6 18. Rae1 Qb5+ 19. Kc1
      Qc5 20. Re4 Bf5 21. Ng5+ Kg6 22. Qxf7+ Kxg5 {
      almanzor1 (2330)-marinscrofan (1810)/gameknot.com 2014/1-0}) 8... Re8 9. Kc1
      Re6 $2 $146 (9... Qc5 10. Qd3 h6 11. e4 Na6 12. Qc3 Rxe4 13. Qxc5 Nxc5 14. Nxc7
      Rb8 15. Kd2 d6 16. Nb5 Bg4 17. Bd3 Bxf3 18. gxf3 Re5 19. Rab1 {
      1-0 Welti,M-Mothes,R/corr SOK-96-118 1997}) (9... Qc5 10. Qd3 Qa5 $18) 10. Qd4
      $18 Qxd4 11. Nxd4 Rd6 (11... Na6 12. Nxe6 dxe6 13. Ne7+ Kf8 14. Nxc8 Rxc8 15.
      e3 $18) 12. Nf5 Rxd5 13. Ne7+ Kf8 14. Nxd5 (14. Nxc8 Nc6 15. Rb1 Nd8 $17) 14...
      Na6 15. e4 c6 16. Bxa6 bxa6 (16... cxd5 17. Bd3 $18) 17. Nc3 (17. Ne3 Rb8 $18)
      17... d6 18. Rb1 Be6 (18... Ke7 19. Ne2 $18) 19. Rd1 1-0
      
      [Event "Berlin Chemie op"]
      [Site "?"]
      [Date "2001.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Fruebing, Stefan"]
      [Result "1-0"]
      [WhiteElo "2040"]
      [PlyCount "129"]
      [EventDate "2001.??.??"]
      
      1. b4 {A00: Irregular Openings} e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. e3 O-O 5. a3 Ba5
      (5... Re8 6. axb4 Rxe5 7. d4 Re8 8. Nf3 Nc6 9. b5 Ne7 10. Bd3 Ned5 11. O-O d6
      12. c4 Nb4 13. Nc3 Nxd3 14. Qxd3 Bg4 15. Nd2 a6 16. bxa6 bxa6 17. Rfb1 c5 18.
      h3 Bh5 19. f4 Nd7 20. g4 {Pleschke,H (1700)-Jensen,J (1700) corr 1999 1/2}) 6.
      Nf3 Re8 $146 (6... Nc6 7. Bb2 d5 8. Be2 Bf5 9. O-O Qe7 10. c4 Rad8 11. d4 Rfe8
      12. Qb3 Bc8 13. Nc3 Bxc3 14. Bxc3 Ne4 15. cxd5 Nxc3 16. Qxc3 Rxd5 17. Rfc1 Qd6
      18. Rab1 Ra5 19. Rb3 Rh5 20. Ne5 Rh6 21. Bf3 {
      Yffeler,H-Bondick,K corr 1994 1-0 (31)} Nxe5 22. dxe5 Qxe5 23. Qxe5 Rxe5 24.
      Rxc7 Re8 25. Rbc3 Bf5 26. Bd5 Be6 27. Bxb7 Rd8 28. Bf3 Rb8 29. Rc1 a6 30. Be2
      Bd5 31. Rc8+ {1-0 (31) Yffeler, H-Bondick,K corr 1994}) 7. Be2 d5 {
      Black has an active position} 8. O-O c5 9. c4 Nc6 10. Bxf6 Qxf6 11. cxd5 Qxa1
      12. dxc6 Qf6 {Black threatens to win material: Qf6xc6} (12... bxc6 {Inferior is
      } 13. Qa4 Rb8 14. Nc3 (14. Qxa5 $143 Rxb1 15. h3 Rxf1+ 16. Bxf1 Bf5 $15) 14...
      Bxc3 15. Rxa1 Bxa1 16. h4 $14) 13. Qa4 Bc7 14. Nc3 bxc6 15. Nd5 Qd6 16. Nxc7
      Qxc7 17. Rc1 Qb6 18. Qc2 Rb8 19. Ng5 g6 {Covers h5} 20. Bc4 {
      White threatens to win material: Bc4xf7. The bishop is not easily driven from}
      Re7 21. f4 (21. Qd3 $142 $5 $15 {must be considered}) 21... Qb2 $17 22. Qc3 (
      22. Be2 Be6 $17) 22... Qxc3 (22... Bf5 23. Nf3 $19) 23. Rxc3 $17 Rb2 24. Nf3
      Be6 (24... Bf5 $142 $5 $17) 25. Bxe6 $15 Rxe6 26. Rxc5 Rb5 {
      Black threatens to win material: Rb5xc5} 27. Rc3 c5 28. Kf2 f6 {
      Consolidates e5+g5} 29. g4 Kf7 30. g5 {This push gains space} f5 31. h4 Rd6 32.
      a4 {White threatens to win material: a4xb5} Rb4 {
      Black threatens to win material: Rb4xa4} 33. Rxc5 Rxa4 34. h5 {
      Trying to unravel the pawn chain} Ra2 {
      d2 becomes a target[%cal Ra2d2,Rd6d2,Gf3d2]} 35. Rc7+ Kg8 (35... Ke8 $142 $5
      $11 {should be examined more closely}) 36. h6 $16 Rd8 37. Ke2 (37. Kg3 Rf8 38.
      Rg7+ Kh8 39. d3 $18) 37... a5 38. Rg7+ Kh8 39. Ra7 a4 40. Nd4 a3 {
      Is this a dangerous pawn?} 41. Kd3 Kg8 42. Ra6 Kf7 43. Kc3 (43. Ra7+ Kg8 $11)
      43... Rc8+ 44. Nc6 $2 (44. Kd3 Rc7 $11) 44... Ra1 $4 {forfeits the advantage} (
      44... Rb2 $142 {Black would have gained the upper hand} 45. Kd3 a2 46. Ne5+ Ke7
      $19) 45. Kd3 $15 Kf8 46. Ke2 Kf7 47. Ne5+ {The white knight is well posted.} (
      47. Kd3 $142 $11) 47... Kg8 $4 {gives the opponent new chances} (47... Ke8 $142
      $15 {would hold out}) 48. Ra7 $18 a2 49. Rg7+ Kf8 50. Nd7+ Ke8 51. Nf6+ Kf8 52.
      Nxh7+ Ke8 53. Nf6+ Kf8 54. Ra7 (54. Rg8+ {seems even better} Kf7 55. Rxc8 Rh1
      $18) 54... Re1+ $2 (54... Rh1 $142 55. Rxa2 Rd8 $16) 55. Kxe1 Rc1+ 56. Ke2 a1=Q
      57. Rxa1 Rxa1 58. Nd7+ Kg8 59. Ne5 Kh7 60. Nc4 (60. d4 Ra2+ 61. Kf3 Ra1 $18)
      60... Ra4 (60... Rb1 61. Kd3 $18) 61. Kd3 Ra6 $6 {
      Black seems to have resigned himself to defeat.} (61... Ra8 62. Kd4 Kg8 63. Kd5
      Rd8+ 64. Ke6 $18) 62. Kd4 Re6 $4 {terrible, but the game is lost in any case} (
      62... Ra8 $142 $18) 63. Kd5 Re4 64. d4 Re8 65. Ne5 1-0
      
      [Event "Lichtenberger Sommer, Berlin GER"]
      [Site "?"]
      [Date "2006.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Tchetchelnitski, Boris"]
      [Result "0-1"]
      [WhiteElo "1975"]
      [BlackElo "2200"]
      [PlyCount "66"]
      [EventDate "2006.??.??"]
      
      1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. a3 Be7 5. Nf3 d5 6. e3 O-O 7. Be2 c5 8. c4
      $146 Nc6 (8... Nbd7 9. Bg3 (9. Bb2 dxc4 (9... Nb6 10. cxd5 (10. Ne5 Nxc4 11.
      Nxc4 dxc4 12. Bxc4 Be6 13. Bxe6 fxe6 14. Nc3) 10... Nbxd5 11. Nc3 Nxc3 12. Bxc3
      Ne4 13. O-O Nxc3 14. dxc3) (9... g6 10. cxd5 (10. Nc3 dxc4 11. Bxc4 Nb6 12. Be2
      Bf5 13. O-O c4 14. a4) 10... Nxd5 11. Nc3 N7f6 12. Qb3 Qb6 13. Qxb6 axb6 14.
      Nxd5) 10. O-O (10. Nc3 Qa5 11. Bxc4 Nb6 12. Be2 c4 13. O-O Bd7 14. d4) 10...
      Nb6 11. Nc3 Be6 12. Qc2 Qd6 13. a4 g6 14. Nb5) (9. O-O Nxe5 (9... Ne4 10. Bb2 (
      10. Bg3 Nb6 11. cxd5 Nxd5 12. Be5 Bf6 13. d3 Nd6 14. d4) 10... dxc4 11. Nc3 Nd6
      12. d4 cxd3 13. Bxd3 c4 14. Bc2) (9... dxc4 10. Nc3 (10. Bxc4 Nxe5 11. Nxe5 Qc7
      12. f4 Bd6 13. Nf3 Bf5 14. Nc3) 10... Nb6 11. Qc2 Bd6 12. Bxf6 gxf6 13. a4 a5
      14. Nb5) 10. Nxe5 d4 11. Re1 Re8 12. Bd3 Qc7 13. Nf3 Bg4 14. h3) (9. Bxf6 Bxf6
      (9... Nxf6 10. O-O (10. Qc2 d4 11. O-O Re8 12. a4 g6 13. Na3 a6 14. Bd3) 10...
      d4 11. Qc2 Re8 12. a4 g6 13. Bd3 Bg4 14. Na3) 10. Nc3 (10. d4 dxc4 11. Bxc4 Nb6
      12. Be2 Bg4 13. O-O Bxf3 14. Bxf3) 10... Nb6 11. cxd5 Nxd5 12. Rc1 Nxc3 13.
      dxc3 Qa5 14. Qb3) 9... Ne4 (9... dxc4 10. Bxc4 (10. Nc3 Nb6 11. Qc2 g6 12. Ne5
      Bf5 13. Qb2 Nh5 14. Nxc4) 10... Nb6 11. Be2 Nfd5 12. e4 Bf6 13. e5 Be7 14. O-O)
      (9... Nb6 10. cxd5 (10. O-O Nxc4 11. Nc3 Be6 12. Ng5 Nd6 13. Nxe6 fxe6 14. Qc2)
      10... Nfxd5 11. e4 Bf6 12. e5 Be7 13. O-O Bf5 14. Nc3) 10. Nc3 (10. Qc2 Nb6 11.
      Nc3 Nxc3 12. dxc3 Nxc4 13. O-O Nd6 14. Rfd1) 10... Nb6 11. cxd5 Nxc3 12. dxc3
      Nxd5 13. Qb3 Be6 14. O-O-O) (8... d4 9. exd4 (9. Bd3 Nc6 (9... Bg4 10. h3 (10.
      O-O Nc6 11. Bf4 Nh5 12. Be4 Nxf4 13. exf4 Qc7 14. Re1) 10... Bxf3 11. Qxf3 dxe3
      12. Qxe3 Re8 13. O-O Nc6 14. Bc3) (9... Re8 10. O-O (10. Bg3 Nc6 11. O-O Nh5
      12. exd4 Nxg3 13. hxg3 cxd4 14. Re1) 10... Nc6 11. Bf4 Nh5 12. Ne5 Nxf4 13.
      exf4 Qd6 14. Re1) 10. O-O (10. Bg3 dxe3 11. dxe3 Qa5+ 12. Qd2 Nb4 13. O-O Rd8
      14. Ne5) 10... Nxe5 11. Nxe5 Bd6 12. exd4 cxd4 13. Re1 Re8 14. f4) (9. Qb3 Nc6
      (9... Re8 10. O-O (10. Bf4 Nh5 11. Be5 Nc6 12. O-O f6 13. Bg3 Nxg3 14. hxg3)
      10... Nc6 11. Re1 Nxe5 12. Nxe5 Bd6 13. Nf3 h6 14. g3) (9... Ng4 10. O-O (10.
      Bxb8 Rxb8 11. h3 Nf6 12. O-O Qd6 13. exd4 cxd4 14. Bd3) 10... Nxe5 11. Nxe5 Nc6
      12. Nxc6 bxc6 13. Bf3 Qd6 14. exd4) 10. O-O (10. exd4 cxd4 11. O-O Re8 12. Bg3
      Ne4 13. Re1 Nxg3 14. hxg3) 10... Nxe5 11. Nxe5 Re8 12. Re1 Bd6 13. Nf3 h6 14.
      g3) (9. Qa4 Nc6 (9... d3 10. Bd1 (10. Bf1 Nc6 11. Nc3 Ng4 12. Bg3 Bf6 13. h3
      Nh6 14. Rc1) 10... Nc6 11. O-O Ne4 12. Bb2 Bf6 13. Ra2 Be6 14. Nc3) (9... Re8
      10. exd4 (10. Qb5 Nc6 11. O-O Nxe5 12. Nxe5 Bd6 13. Nf3 Qc7 14. Re1) 10... Nc6
      11. Nc3 cxd4 12. Nd5 d3 13. Bxd3 Bd6 14. Nxf6+) 10. O-O (10. exd4 cxd4 11. Qb3
      Re8 12. O-O Bc5 13. Bxf6 Qxf6 14. Bd3) 10... Re8 11. Bf4 Bd6 12. Bxd6 Qxd6 13.
      Qc2 g6 14. Bd3) 9... Nc6 (9... cxd4 10. Bxd4 (10. Nxd4 Re8 11. Nc3 Bc5 12. Bxf6
      Qxf6 13. Nf3 Nc6 14. O-O) 10... Nc6 11. Be3 Ne4 12. Nc3 Nxc3 13. dxc3 Qa5 14.
      Qb3) (9... Bf5 10. d5 (10. Nh4 Bd7 11. d5 Nxd5 12. cxd5 Bxh4 13. O-O Re8 14.
      Bg3) 10... Nbd7 11. Bg3 Ne4 12. Nc3 Bf6 13. O-O Nxg3 14. hxg3) 10. d5 (10. Qb3
      cxd4 11. O-O Re8 12. Bg3 Ne4 13. Re1 Nxg3 14. hxg3) 10... Nxe5 11. Nxe5 Qc7 12.
      Nf3 Ne4 13. Nc3 Bf5 14. O-O) (8... Ng4 9. Bg3 (9. Nc3 Nxe5 (9... Nc6 10. Bf4 (
      10. Bg3 d4 11. Nd5 dxe3 12. fxe3 Bd6 13. Bh4 f6 14. h3) 10... dxc4 11. h3 Nf6
      12. Bxc4 Na5 13. Be2 Nd5 14. Nxd5) (9... dxc4 10. Bf4 (10. Bg3 Nc6 11. h3 Nf6
      12. Bxc4 a6 13. Qc2 b5 14. Be2) 10... Nc6 11. h3 Nf6 12. Bxc4 a6 13. a4 Na5 14.
      Be2) 10. Nxe5 d4 11. Nd5 Nc6 12. Nxe7+ Qxe7 13. Nxc6 bxc6 14. O-O) (9. Bf4 d4 (
      9... Nc6 10. cxd5 (10. Nc3 dxc4 11. h3 Nf6 12. Bxc4 a6 13. Ne5 Nxe5 14. Bxe5)
      10... Qxd5 11. Nc3 Qf5 12. O-O Be6 13. Qb1 Qxb1 14. Raxb1) (9... dxc4 10. h3 (
      10. Nc3 Nc6 11. h3 Nf6 12. Bxc4 Na5 13. Be2 Nd5 14. Nxd5) 10... Nf6 11. Bxc4
      Nbd7 12. Nc3 Nb6 13. Be2 Nfd5 14. Be5) 10. h3 (10. exd4 cxd4 11. h3 Nf6 12. Bd3
      Re8 13. O-O Bd6 14. Bxd6) 10... Nf6 11. Qc2 Nc6 12. O-O Bd6 13. Bxd6 Qxd6 14.
      exd4) (9. Bb2 Qb6 (9... Nc6 10. h3 (10. cxd5 Qxd5 11. Nc3 Qf5 12. Qb3 Be6 13.
      Qxb7 Rab8 14. Qxc6) 10... Nf6 11. cxd5 Nxd5 12. Nc3 Be6 13. Qc2 Rc8 14. O-O) (
      9... dxc4 10. h3 (10. Bxc4 Qb6 11. Qc1 Be6 12. Bxe6 Qxe6 13. h3 Nf6 14. Qc2)
      10... Nf6 11. Bxc4 Nc6 12. Nc3 Na5 13. Be2 Be6 14. O-O) 10. Qc1 (10. Bc3 dxc4
      11. Bxc4 Nc6 12. h3 Nf6 13. O-O Bf5 14. d3) 10... dxc4 11. Bxc4 Be6 12. Bxe6
      fxe6 13. h3 Nf6 14. Bxf6) 9... d4 (9... dxc4 10. h3 (10. Nc3 Nc6 11. h3 Nf6 12.
      Bxc4 Na5 13. Be2 Be6 14. O-O) 10... Nh6 11. Bxc4 Nf5 12. Nc3 Nd7 13. Bf4 Nb6
      14. Be2) (9... Bf6 10. Nc3 d4 11. Nd5 dxe3 12. Nxf6+ Nxf6 13. dxe3 Nc6 14. O-O)
      10. Nxd4 (10. h3 Nh6 11. Qc2 Nc6 12. O-O Nf5 13. Bf4 Bf6 14. Ra2) 10... cxd4
      11. Bxg4 Nc6 12. O-O Qb6 13. Bxc8 Rfxc8 14. Ra2) (8... Be6 9. Qc2 (9. cxd5 Nxd5
      (9... Bxd5 10. Nc3 (10. O-O Nc6 11. Bg3 Ne4 12. Nc3 Bf6 13. Rc1 Bxc3 14. dxc3)
      10... Nc6 11. Bxf6 Bxf6 12. Rb1 Rb8 13. Qc2 g6 14. Nxd5) (9... Qxd5 10. Nc3 (
      10. O-O Nc6 11. Nc3 Qd7 12. Qc2 Rad8 13. Rab1 Bf5 14. e4) 10... Qd7 11. O-O Nc6
      12. Qc2 h6 13. h3 Rfd8 14. Rad1) 10. Nc3 (10. O-O Nc6 11. Nc3 Nxe5 12. Nxe5 Bf6
      13. f4 Bxe5 14. fxe5) 10... Nd7 11. Nxd5 Bxd5 12. Bc3 Nf6 13. d3 Bd6 14. O-O) (
      9. Nc3 dxc4 (9... Nc6 10. Bxf6 (10. cxd5 Nxd5 11. Qc2 Nxe5 12. Nxe5 f6 13. Nf3
      Nxc3 14. dxc3) 10... Bxf6 11. cxd5 Bxd5 12. Rb1 Bxc3 13. dxc3 b6 14. Qc2) (9...
      Nbd7 10. cxd5 (10. Nxd5 Bxd5 11. cxd5 Nxe5 12. Nxe5 Qxd5 13. f4 Bd6 14. Bf3)
      10... Nxd5 11. Nxd5 Bxd5 12. Bc3 Nf6 13. d3 Ng4 14. Rc1) 10. Ng5 (10. Rb1 Qd7
      11. Qa4 Qxa4 12. Nxa4 b6 13. Rc1 b5 14. Nc3) 10... Bf5 11. Bxc4 Nc6 12. Nf3 a6
      13. O-O b5 14. Be2) (9. O-O Nc6 (9... dxc4 10. Qc2 (10. a4 Nc6 11. Na3 Ne4 12.
      Nxc4 Bxc4 13. Bxc4 Nxe5 14. Nxe5) 10... Nc6 11. Bxc4 Nxe5 12. Nxe5 Bd6 13. f4
      Bxe5 14. fxe5) (9... Nbd7 10. cxd5 (10. Qc2 Nxe5 11. Nxe5 Bd6 12. f4 d4 13. Qb2
      Qc7 14. exd4) 10... Nxd5 11. Bb2 N7f6 12. Qc2 g6 13. Nc3 Nxc3 14. Qxc3) 10. Qc2
      (10. cxd5 Nxd5 11. Nc3 Nxe5 12. Nxe5 Bf6 13. f4 Bxe5 14. fxe5) 10... d4 11.
      exd4 cxd4 12. Re1 Re8 13. Bg3 Nh5 14. Be5) 9... dxc4 (9... Nc6 10. cxd5 (10.
      O-O d4 11. exd4 cxd4 12. Re1 Re8 13. Bg3 Nh5 14. Be5) 10... Nxd5 11. Nc3 Nxe5
      12. Nxe5 f6 13. Bg4 Bxg4 14. Nxg4) (9... Nbd7 10. cxd5 (10. Bb2 dxc4 11. Ng5
      Qb6 12. Nxe6 fxe6 13. Bxc4 Qc6 14. O-O) 10... Nxd5 11. Bb2 c4 12. O-O Rc8 13.
      Nc3 Bf6 14. Ne4) 10. O-O (10. Bxc4 Nc6 11. O-O Nxe5 12. Nxe5 Bd6 13. f4 Bxe5
      14. fxe5) 10... Nc6 11. Bxc4 Nxe5 12. Nxe5 Bd6 13. f4 Bxe5 14. fxe5) 9. Bb2 (9.
      O-O Nxe5 (9... d4 10. Qb3 (10. exd4 cxd4 11. Bd3 Nxe5 12. Nxe5 Bd6 13. Re1 Re8
      14. f4) 10... Nxe5 11. Nxe5 Re8 12. Nf3 Bd6 13. Re1 Re7 14. h3) (9... Bf5 10.
      cxd5 (10. d4 Ne4 11. cxd5 Qxd5 12. Nbd2 Nxe5 13. dxe5 Nxd2 14. Qxd2) 10... Qxd5
      11. Nc3 Qe6 12. Bf4 h6 13. d4 cxd4 14. exd4) 10. Nxe5 d4 $15 11. Qb3 Re8 12.
      Re1 Bd6 13. Nf3 b6 14. exd4) (9. Nc3 Nxe5 (9... d4 10. exd4 (10. Bxf6 Bxf6 11.
      Nd5 Bf5 12. Rb1 Bxb1 13. Qxb1 Qd6 14. O-O) 10... cxd4 11. Bxf6 Bxf6 12. Nd5 d3
      13. Bxd3 Re8+ 14. Kf1) 10. Nxe5 d4 11. Na4 Bd6 12. exd4 cxd4 13. f4 Re8 14. O-O
      ) (9. Bxf6 Bxf6 10. Nc3 (10. cxd5 Bxa1 11. dxc6 bxc6 12. Qc2 Rb8 13. O-O Qa5
      14. Nc3) 10... d4 11. Nd5 Bf5 12. Rb1 Bxb1 13. Qxb1 Qd6 14. O-O) (9. Qc2 Re8 (
      9... d4 10. Bg3 (10. exd4 cxd4 11. Bg3 Nh5 12. O-O Nxg3 13. hxg3 Re8 14. Re1)
      10... g6 11. O-O Nh5 12. exd4 Nxd4 13. Nxd4 Qxd4 14. Nc3) (9... Ng4 10. Bf4 (
      10. Bg3 Bf6 11. cxd5 Bxa1 12. dxc6 bxc6 13. O-O Be6 14. Nc3) 10... Bf6 11. cxd5
      Ne7 12. Nc3 Nxd5 13. Nxd5 Qxd5 14. Rc1) 10. Bg3 (10. Bb2 d4 11. O-O Bd6 12. Bd3
      h6 13. exd4 cxd4 14. Nxd4) 10... g6 11. cxd5 Bf5 12. Qb2 Nxd5 13. Nc3 Bf6 14.
      Bh4) 9... Qb6 (9... dxc4 10. Bxc4 (10. Qc2 b5 11. Nc3 Qb6 12. O-O g6 13. Ng5
      Bf5 14. Nce4) 10... Bf5 (10... Na5 11. Ba2 Bf5 12. Nc3 Qb6 13. Bb1 Bd7 14. Qc2)
      11. O-O $15 (11. Nc3 Na5 12. Be2 Qb6 13. Na4 Qb3 14. Bxf6) 11... Na5 12. Be2
      Qb6 13. Be5 Nb3 14. Ra2) (9... d4 10. Qc2 (10. Qb3 Bf5 11. O-O Qd6 12. Re1 Na5
      13. Qa4 Qb6 14. Qb5) 10... h6 11. O-O Re8 12. Qd3 Bg4 13. exd4 cxd4 14. h3) 10.
      Nc3 (10. Bxf6 Bxf6 11. Nc3 dxc4 12. Bxc4 Qd8 $15 (12... Qa5 13. Qb3 Rb8 14. Bd5
      ) 13. Rb1 Bf5 14. Rb5) 10... dxc4 (10... Qxb2 $143 11. Na4 Qxa1 12. Qxa1 dxc4 (
      12... Bd7 13. Ne5 Be6 14. cxd5) 13. Bxc4 $14 (13. Ne5 Be6 14. Bxc4) 13... Bf5
      14. Qb2) 11. Bxc4 Na5 (11... Qxb2 $143 12. Na4 Qxa1 13. Qxa1 $14 Bd6 14. Nc3)
      12. Na4 Qd8 (12... Qc6 13. Bf1 Be6 14. Ne5) 13. Ba2 Bf5 (13... c4 14. Nd4 $15)
      14. d4 (14. Rc1 b6 $15) 14... c4 15. O-O Rc8 16. Rc1 Bd6 (16... b5 17. Nc3 $15)
      17. Re1 (17. Ne5 Qe8 18. Bc3 Nb3 19. Nxc4 Bxh2+ (19... Rxc4 $143 20. Bxb3 Bg4
      21. Qc2 $16) 20. Kxh2 Nxc1 21. Qxc1 Qxa4 $19) 17... Re8 18. Ne5 (18. Nc3 $5 $15
      ) 18... b5 $17 19. Nc3 Bxe5 20. dxe5 Qxd1 (20... Rxe5 21. Qf3 $17) 21. Rcxd1
      Rxe5 22. f3 (22. e4 Nxe4 (22... Bxe4 $143 23. f3 $16) 23. Nd5 Ree8 $17) 22...
      Bd3 (22... Bc2 23. Rd2 Bd3 24. e4 $17) 23. Ne4 (23. e4 $5 Ne8 24. Nd5 $15)
      23... Rxe4 $19 24. fxe4 (24. Bxf6 Ree8 (24... gxf6 $6 25. fxe4 Bxe4 26. Rd7 $15
      ) 25. Bc3 Nc6 $19) 24... Nxe4 25. Bd4 Nc6 (25... a6 26. Bb1 Bxb1 27. Rxb1 $19)
      26. Ba1 (26. Bb1 Bxb1 27. Rxb1 a6 $19) 26... a5 (26... b4 27. axb4 Nxb4 28. Bb1
      $19) 27. Bb1 (27. Rc1 Kf8 $19) 27... Bxb1 28. Rxb1 b4 29. axb4 axb4 30. Bd4 (
      30. Red1 c3 31. Rd7 Kf8 $19) 30... f5 31. Rec1 c3 (31... Nxd4 $6 32. exd4 Nc3
      33. Rxc3 bxc3 34. Kf2 $19) 32. Ra1 (32. Rc2 $19) 32... Nxd4 33. exd4 b3 0-1
      
      [Event "Berlin"]
      [Site "?"]
      [Date "2006.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Offermann, Fernando"]
      [Result "0-1"]
      [WhiteElo "1810"]
      [BlackElo "1985"]
      [PlyCount "52"]
      [EventDate "2006.??.??"]
      
      1. b4 e5 $15 2. Bb2 Bxb4 3. Bxe5 Nf6 4. a3 Ba5 5. Nf3 O-O 6. e3 d5 7. Be2 c5 8.
      O-O Nc6 9. Bb2 d4 10. a4 (10. Qc1 Re8 $15) 10... Bc7 (10... Qb6 11. Qc1 $15)
      11. Na3 $11 a6 12. Re1 Rb8 (12... Re8 13. Rb1 $15) 13. exd4 (13. Bc4 Re8 $11)
      13... cxd4 14. Nc4 Qd5 15. Bd3 (15. a5 $5 $11) 15... Bg4 $15 16. Ba3 (16. h3
      Bxf3 17. Qxf3 Qxf3 18. gxf3 Rfe8 $15) 16... Rfe8 (16... b5 17. axb5 axb5 18.
      Bxf8 bxc4 19. Bxc4 Qxc4 20. Be7 Nxe7 21. Rxe7 $19) 17. Rxe8+ Rxe8 18. Rb1 $2 (
      18. h3 Bh5 19. g4 Nxg4 20. hxg4 Bxg4 21. Be2 Bxf3 22. Bxf3 Qxc4 23. Qb1 $19)
      18... b5 $19 19. axb5 axb5 20. Rxb5 (20. Ne3 dxe3 21. dxe3 $19) 20... Qxb5 21.
      Nd6 Qh5 22. Nxe8 Nxe8 (22... Bxh2+ $142 $5 23. Kf1 Nxe8 24. Qe1 $19) 23. h3 Bd7
      (23... Bxf3 24. Qxf3 Qxf3 25. gxf3 $19) 24. Be2 (24. Qe2 Qa5 25. Bb2 Qa2 $19)
      24... Qd5 25. Bb2 Bb6 26. Qf1 Nd6 (26... Nd6 27. Qa1 Nb4 $19) 0-1
      
      [Event "LiraH Autumn"]
      [Site "?"]
      [Date "2008.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Behrmann, Joachim"]
      [Result "0-1"]
      [WhiteElo "1960"]
      [BlackElo "2200"]
      [PlyCount "46"]
      [EventDate "2008.??.??"]
      
      1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. Nf3 O-O 5. a3 Ba5 6. e3 d5 7. Be2 c5 8. O-O
      Nc6 9. Bg3 Ne4 10. d3 (10. Bh4 $5 Qb6 11. d3 $15) 10... Nxg3 $17 11. hxg3 Be6
      12. Nbd2 b6 13. c4 Bc3 14. Rb1 dxc4 15. Nxc4 Bf6 16. Qc2 Qd7 17. Rfd1 g6 18.
      Rd2 (18. Nfd2 Bg7 $15) 18... Rfc8 19. Rdd1 Rab8 20. Qa4 (20. Nfd2 $142 $5 $15)
      20... Nd4 $19 21. Qxd7 Nxe2+ (21... Bxd7 $2 22. exd4 cxd4 23. Re1 $18) 22. Kf1
      Nxg3+ $1 (22... Bxd7 $6 23. Kxe2 Bg4 24. e4 $15) 23. fxg3 Bxd7 0-1
      
      [Event "9th Berlin Germany, Lichtenberger Somme"]
      [Site "?"]
      [Date "2010.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Solhjou, Mohammed Hassan"]
      [Result "0-1"]
      [WhiteElo "1965"]
      [BlackElo "1960"]
      [PlyCount "46"]
      [EventDate "2010.??.??"]
      
      1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. Nf3 Nc6 5. Bb2 O-O 6. a3 Ba5 7. e3 Re8 8.
      Be2 d5 9. O-O Bg4 10. d3 $146 (10. d4 Ne4 11. Nbd2 Nxd2 12. Nxd2 Bxe2 13. Qxe2
      Bb6 14. c4 Nxd4 15. Qd3 dxc4 16. Qxc4 Ne6 17. Rfd1 Qg5 18. Nf3 Qh5 19. Ne5 Rad8
      20. g3 Rxd1+ {0-1 mihai740609-tigrus1st/kurnik 2014}) 10... Qe7 11. Nbd2 Rad8
      12. h3 Bc8 13. Nb3 Bb6 14. d4 Nb8 (14... Bf5 15. Bb5 $11) 15. a4 c6 (15... a5
      16. Qe1 $11) 16. Ba3 Qe6 17. Rc1 (17. a5 Bc7 $11) 17... Ne4 18. c4 Qh6 (18...
      Qg6 19. Nh4 Qf6 20. Nf3 $11) 19. Ne5 (19. cxd5 Rxd5 20. Bc4 Rdd8 $11) 19...
      dxc4 20. Nxc4 Bc7 21. Bf3 (21. Qc2 $5 $15) 21... Bxh3 $17 22. gxh3 $4 (22. Bxe4
      Bh2+ $1 23. Kxh2 Bg4+ 24. Kg1 Bxd1 25. Bxh7+ Kxh7 26. Rfxd1 $19) 22... Qxh3 $19
      23. Nd6 (23. Ne5 Bxe5 24. dxe5 Rxd1 25. Rcxd1 Qxf3 26. Nd4 Qg4+ 27. Kh2 Qh4+
      28. Kg2 Rxe5 29. Ne2 $19) 23... Rxd6 (23... Rxd6 24. Bg4 Rg6 25. f4 Qxe3+ 26.
      Kh1 Rh6+ 27. Bh5 Qh3+ 28. Kg1 Qg3+ 29. Kh1 Nf2+ 30. Rxf2 Re1+ 31. Rf1 Rxf1+ 32.
      Qxf1 Rxh5+ 33. Qh3 Rxh3#) 0-1
      
      [Event "Berlin Lichtenberger op 8th"]
      [Site "?"]
      [Date "2009.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Plump, Detlef"]
      [Result "0-1"]
      [WhiteElo "1945"]
      [BlackElo "2255"]
      [PlyCount "116"]
      [EventDate "2009.??.??"]
      
      1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. Nf3 O-O 5. e3 d5 6. a3 Ba5 7. c4 c5 8. cxd5
      Nxd5 9. Qc2 Nc6 10. Bb2 Qe7 (10... Qd6 11. Nc3 Nxc3 12. Bxc3 Bxc3 13. dxc3 Bg4
      14. Ng5 Qh6 15. h4 Rad8 16. Qe4 Bh5 17. Bb5 Na5 18. g4 a6 19. gxh5 axb5 20. Qb1
      c4 21. Qxb5 Nb3 22. Rb1 Qf6 23. Ne4 Qf3 24. Ng3 Rd5 25. Qxc4 {
      Pierred (2155)-Proximo (2605)/Rated game, 5m + 0s 2005/0-1}) (10... Bg4 11. Be2
      Qe7 12. O-O Rad8 13. h3 Bh5 14. Nc3 Nxc3 15. Bxc3 Bg6 16. Qb2 Bxc3 17. Qxc3 Be4
      18. Rfd1 g6 19. d3 Bd5 20. Rac1 b6 21. d4 Nxd4 22. Nxd4 cxd4 23. Rxd4 Be6 24.
      Rxd8 Rxd8 25. Qb2 {
      Nemec,Z (2030)-Korzh,L (1985)/RB-2010-0-00104 2011/1/2-1/2 (31)}) 11. Nc3 $146
      (11. Bd3 h6 12. O-O Bg4 13. Be2 Rad8 14. h3 Bh5 15. Nc3 Nxc3 16. Bxc3 Bxc3 17.
      Qxc3 Rd7 18. d3 Rfd8 19. Rfd1 b6 20. Rd2 Qe6 21. Rad1 Rd6 22. d4 Qf6 23. Qc1
      Bxf3 24. Bxf3 cxd4 25. Bxc6 Rxc6 {
      Buczinski,H-Dziedzina,M/IECG 2010/1/2-1/2 (32)}) (11. Be2 g6 12. O-O Bf5 13.
      Bd3 Bxd3 14. Qxd3 Rfd8 (14... Rad8 15. Qc2 b5 16. d3 Nxe3 17. fxe3 Qxe3+ 18.
      Kh1 Qxd3 19. Qc1 Nd4 20. Nxd4 cxd4 21. a4 b4 22. Qd1 Qxd1 23. Rxd1 d3 24. Nd2
      Rfe8 25. Rab1 Rd5 26. Bc1 Re2 27. Nf3 Ra2 28. Be3 Rxa4 29. Bxa7 {
      Rook,D (2270)-Salzmann,S (2145)/CP-2008-Q-00012 2010/1-0 (100)}) 15. Qc2 Rac8
      16. d3 Bc7 17. Nbd2 b5 18. Rac1 Ne5 19. Nxe5 Bxe5 20. Bxe5 Qxe5 21. Ne4 c4 22.
      d4 Qe7 23. Qb1 a6 24. Nc5 Qd6 25. Qb2 Qc6 {
      Degterev,P (2225)-Fages,J (2140)/SM-2010-0-00110 2010/1/2-1/2 (80)}) 11... Nxc3
      12. Bxc3 Bxc3 13. Qxc3 Bg4 14. Be2 Rac8 15. Rb1 b6 16. h3 Bh5 17. Rb2 Rfd8 18.
      O-O Rd6 19. Rd1 Rcd8 20. d3 h6 21. Rbd2 Bg6 22. d4 cxd4 23. Nxd4 Nxd4 24. Rxd4
      $2 (24. exd4 $142 $5 Re6 25. Bg4 Re1+ 26. Rxe1 Qxe1+ 27. Kh2 $11) 24... Rxd4
      $17 25. Rxd4 Rxd4 26. Qxd4 Qxa3 27. Kh2 Qa2 28. Qd1 a5 29. h4 Qc2 30. Qf1 h5
      31. g4 hxg4 32. Bxg4 Be4 33. Kg3 Qc7+ 34. f4 Qc2 35. Bf3 Qc6 36. Bxe4 Qxe4 37.
      Qc1 a4 38. Kf2 b5 39. Qc8+ Kh7 40. Qd7 Qc4 41. Qf5+ Kg8 42. h5 b4 43. h6 gxh6
      44. Qg4+ Kh8 45. Qh4 Qc2+ 46. Kf3 Qc6+ 47. Kf2 Kh7 48. Qe7 Qc4 49. Qd7 b3 50.
      Qf5+ Kg8 51. Qf6 (51. Qg4+ Kf8 52. Qh4 Qc2+ 53. Kf3 b2 54. Qxh6+ Kg8 55. Qg5+
      Qg6 56. Qd8+ Kh7 57. Qh4+ Kg7 $19) 51... Qc2+ 52. Kf3 Qg6 (52... b2 $142 53.
      Qd8+ Kg7 54. Qd4+ Kg6 55. Qb6+ Kh7 $19) 53. Qe5 Qe6 54. Qb8+ Kh7 55. Qb4 Qc6+
      56. Kg3 (56. e4 $19) 56... Qe6 (56... Qc2 $142 57. Qxa4 Qg6+ 58. Kf2 b2 $19)
      57. Kf2 $4 (57. Kf3 Qh3+ 58. Kf2 $19) 57... Qf5 $19 58. Qxa4 (58. Kf3 $19)
      58... b2 (58... b2 59. Qd1 b1=Q 60. Qxb1 Qxb1 $19) 0-1
      
      [Event "7th Berlin-ch Seniors"]
      [Site "?"]
      [Date "2011.??.??"]
      [Round "?"]
      [White "Pfueller, Volker"]
      [Black "Koerner, Helmut"]
      [Result "0-1"]
      [WhiteElo "1605"]
      [BlackElo "1770"]
      [PlyCount "100"]
      [EventDate "2011.??.??"]
      
      1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. c4 O-O 5. Nf3 Re8 6. e3 Nc6 7. Bb2 d5 8.
      cxd5 Nxd5 9. Be2 Qe7 10. O-O Bf5 11. a3 Bd6 12. d3 $146 (12. Qb3 Qe6 13. d4 a6
      14. Re1 Na5 15. Qa4 b6 16. Nbd2 c6 17. Qd1 Qh6 18. Bf1 Nf6 19. Bc3 Nb7 20. Nc4
      Bc7 21. Nce5 Nd6 22. Bd3 Bxd3 23. Nxd3 Nfe4 24. Qc2 Nc4 25. Red1 Rac8 26. Bb4
      b5 {marekt-GermanPaul/ChessWorld.net 2004/0-1 (41)}) (12. d4 Qe6 13. Nbd2 Rad8
      14. Rc1 Qg6 15. Nc4 Bh3 16. Ne1 Bf5 17. Qb3 Be4 18. f3 Bf5 19. e4 Bf4 20. Rc2
      Qh6 21. g3 Be3+ 22. Kh1 Nxd4 23. Bxd4 Bxd4 24. Ng2 Bg6 25. Qxb7 c5 26. Qxa7 f5
      {Hansen,M (2290)-Markus,R (2440)/CiF 2009/0-1 (55)}) (12. Nc3 Nxc3 13. Bxc3
      Bxa3 14. Qb3 Bb4 15. d4 (15. Bb5 Bxc3 16. Qxc3 Qd6 17. Bxc6 Qxc6 18. Qxc6 bxc6
      19. Ra6 Bd3 20. Rfa1 Bxa6 21. Rxa6 Reb8 22. h3 Rb6 23. Ra4 a5 24. d4 Rb4 25.
      Ra2 a4 26. Ne5 Ra6 27. Nd3 Rb1+ 28. Kh2 a3 29. Kg3 Rd1 {
      mr5reasons1 (1710)-ineedaname (1640)/GK tournament 2012/0-1 (33)}) 15... Be6
      16. Qb2 a5 17. Bb5 Bd5 18. Bxc6 Bxc6 19. Ne5 Bd5 20. Rab1 c5 21. dxc5 Bxc3 {
      0-1 cristero (2490)-flyingtiger/m1380239636 net-chess.com 2013}) 12... Nxe3 (
      12... a5 13. d4 $15) 13. fxe3 $11 Qxe3+ 14. Rf2 Bc5 15. d4 Rad8 16. Qd2 Qe6 (
      16... Nxd4 $142 17. Nxd4 Qe5 $15) 17. Bb5 $16 (17. dxc5 $143 Rxd2 18. Nbxd2 Qd5
      $11) 17... Re7 (17... Be4 18. Ng5 Qb3 19. Qc1 Nxd4 20. Qxc5 (20. Bxe8 $4 Ne2+
      21. Kh1 Qd1+ 22. Rf1 Ng3+ 23. hxg3 Qh5+ 24. Nh3 Qxh3#) 20... Nxb5 21. Nc3 Nxc3
      22. Qxc3 (22. Bxc3 $143 Rd5 23. Qe3 Rxg5 24. Qxg5 Qxc3 $17) 22... Qxc3 23. Bxc3
      $11) 18. Bxc6 (18. dxc5 $6 Rxd2 19. Nbxd2 Qd5 $11) 18... bxc6 (18... Qxc6 19.
      Qa5 Bxb1 20. Rxb1 $16) 19. Qc3 $18 (19. dxc5 $6 Rxd2 20. Nbxd2 Qd5 $11) 19...
      Bb6 20. Kf1 $4 (20. a4 a5 $18) 20... Qg6 $4 (20... Bxd4 21. Nxd4 Bd3+ 22. Re2
      Qe3 $19 (22... Bxe2+ $6 23. Kg1 Qc4 24. Nd2 Qxc3 25. Bxc3 $17)) 21. Nbd2 $16
      Bc8 (21... Bg4 22. h3 Bxf3 23. Nxf3 $18 (23. Qxf3 $6 Bxd4 24. Bxd4 Rxd4 $16))
      22. Nc4 $18 Rde8 (22... f6 23. a4 Re4 24. a5 Bxd4 25. Qb3 $18 (25. Nxd4 $6
      Rexd4 26. Kg1 Qd3 $14)) 23. Nce5 (23. Nfe5 Qe6 $18) 23... Qh5 24. Nxc6 (24. Kg1
      f6 25. Nxc6 Re3 $18) 24... Re3 $16 25. Qd2 $4 (25. Qc4 $142 Be6 26. Qc1 $16)
      25... Qb5+ $19 26. Kg1 Qxc6 27. Ne5 (27. a4 a5 $19) 27... Qe4 28. Raf1 $2 (28.
      Nc4 Re1+ 29. Rxe1 Qxe1+ 30. Rf1 Qxd2 31. Nxd2 $19) 28... Ba6 29. Rc1 f6 (29...
      Rxe5 30. dxe5 Qh4 31. Rc2 $19) 30. Nf3 Re2 (30... c5 $142 $5 31. Bc3 $19) 31.
      Rxe2 Qxe2 (31... Bxe2 $6 32. Re1 $15) 32. Qc3 $2 (32. Re1 Qxd2 33. Rxe8+ Kf7
      34. Nxd2 Kxe8 $19) 32... Qb5 (32... Re3 33. Qc2 $19) 33. Re1 (33. Qb4 Qxb4 34.
      axb4 Re2 $19) 33... Rxe1+ (33... Kf7 $142 $5 34. Rc1 $19) 34. Qxe1 Qe2 (34...
      Ba5 35. Qe6+ Kf8 36. h3 $19) 35. Qxe2 Bxe2 36. Nd2 Kf7 37. Kf2 Bb5 38. Ke3 Ke6
      39. g3 h5 40. Nf3 (40. Ke4 Bc6+ 41. Kd3 Kd5 $19) 40... Kd5 41. Nh4 Ke6 (41...
      c5 42. Nf5 Bd7 43. Nxg7 cxd4+ 44. Kf4 Bc7+ 45. Kf3 Bg4+ 46. Kf2 $19) 42. Ke4 $4
      (42. Nf3 a5 43. Ne1 $19) 42... Bc6+ $19 43. Kd3 $2 (43. Ke3 Kf7 $19) 43... Be8
      (43... g5 $142 44. Ng6 Kf7 $19) 44. Ke4 c6 45. Ng2 (45. h3 g6 $19) 45... g5 46.
      h4 (46. Ne1 Bg6+ 47. Ke3 Kd5 $19) 46... Bg6+ 47. Kf3 a5 (47... Bd8 48. Bc3 $19)
      48. Ne3 Bd3 49. d5+ $4 (49. Bc3 $19) 49... cxd5 50. Bxf6 (50. Kf2 $19) 50...
      Be4+ (50... Be4+ 51. Ke2 Kxf6 $19) (50... Kxf6 $6 51. Nxd5+ Ke5 52. Nxb6 gxh4
      53. gxh4 $11) 0-1
      
      [Event "Berlin Lichtenberger op"]
      [Site "?"]
      [Date "2007.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Prix, Siegfried"]
      [Result "1-0"]
      [WhiteElo "1985"]
      [BlackElo "1760"]
      [PlyCount "125"]
      [EventDate "2007.??.??"]
      
      1. b4 e5 2. Bb2 d6 3. e3 f5 4. d4 Nd7 5. d5 Ngf6 6. Nh3 Nb6 7. c4 Bd7 8. Nc3 a5
      9. a3 axb4 10. axb4 Rxa1 11. Qxa1 Be7 12. Be2 O-O 13. f4 c6 14. Qd1 e4 15. O-O
      cxd5 16. cxd5 Qc7 17. Qb3 Rc8 18. Rc1 Nc4 (18... Qd8 19. Ra1 $11) 19. Nd1 (19.
      Nxe4 $142 Nxe4 20. Rxc4 $16 (20. Bxc4 $2 Bb5 $19)) 19... b5 $15 20. Bd4 Nxd5
      21. Nb2 Ndb6 (21... Be6 $5 22. Nxc4 Nf6 $15) 22. Bxb6 $11 Qxb6 23. Nxc4 Be6 (
      23... bxc4 $142 24. Bxc4+ Kh8 $15) 24. Kf2 $4 (24. Nxb6 Rxc1+ 25. Qd1 Rxd1+ 26.
      Bxd1 $11) 24... bxc4 (24... Bxc4 $6 25. Bxc4+ Kh8 26. Rc2 bxc4 27. Rxc4 $15)
      25. Bxc4 Rxc4 (25... Kh8 $142 $5 26. Qa2 d5 (26... Qxb4 $2 27. Bxe6 Rf8 28. Rc7
      $18) 27. Bxd5 Rxc1 28. Bxe6 Rc3 $19) 26. Rxc4 $15 Kf7 (26... Qb5 $5 27. Rc8+
      Kf7 28. Rf8+ Kxf8 29. Qxe6 h6 $11) 27. Qc2 (27. Qc3 Bxc4 28. Qxc4+ Kg6 29. Qe6+
      Bf6 $16) 27... d5 $2 {Exerts pressure on the isolated pawn} (27... Kg6 28. Rc7
      Bh4+ 29. g3 $14) 28. Rc6 (28. Rc7 Qxb4 29. Ng5+ Kf6 30. Ra7 $18 (30. Nxh7+ $6
      Kg6 31. Rc6 Kxh7 32. Rxe6 d4 $16)) 28... Qxb4 $11 29. Ng5+ Bxg5 30. fxg5 d4 31.
      exd4 Qxd4+ 32. Ke2 (32. Kf1 Bd5 33. Rc5 Kg6 $15) 32... f4 (32... Qg1 $142 $5
      33. g6+ hxg6 34. Rc7+ Kg8 $19) 33. Rc7+ $11 Kg6 34. h3 (34. Qc6 Qb2+ 35. Kf1
      Qb1+ 36. Ke2 Qa2+ 37. Kd1 $15) 34... Kxg5 $17 35. Rc5+ Bf5 36. Kf1 g6 37. Rc4
      Qa1+ 38. Qc1 Qa6 (38... Qxc1+ 39. Rxc1 Kh4 40. Kf2 $19) 39. Kg1 Qb6+ 40. Kh1 (
      40. Rc5 $142 Kh5 41. g4+ fxg3 42. Kg2 $17) 40... e3 $4 (40... Qf2 $142 $19) 41.
      h4+ $11 Kh6 42. Rxf4 Qb1 43. Qxb1 Bxb1 44. Rf3 e2 45. Re3 Kh5 46. g3 (46. Rxe2
      Kxh4 47. Kg1 Kg3 $16) 46... Kg4 (46... Bd3 47. Kg2 $14) 47. Kg2 $16 (47. Rxe2
      $143 Kxg3 48. Rg2+ Kxh4 49. Rh2+ Kg4 50. Rxh7 g5 $11) 47... g5 (47... Bd3 $5
      $16) 48. hxg5 $18 (48. Rxe2 $6 gxh4 49. Re1 Bf5 $11) 48... Kxg5 49. Rxe2 Kg4
      50. Rb2 Be4+ 51. Kf2 Bg6 52. Rb4+ Kg5 53. Kf3 Kf5 (53... h5 54. Rb5+ Bf5 55.
      Rd5 $18) 54. Rb5+ Kf6 55. Kf4 Bd3 56. Rb6+ Kg7 57. Kg5 Kf7 (57... Bc4 58. Rb7+
      Bf7 59. g4 $18) 58. g4 Bg6 (58... Be4 59. Kh6 $18) 59. Kh6 Be4 60. g5 Bd3 (
      60... Ke7 61. Rb4 Bf5 62. Rb7+ Ke6 63. Rxh7 $18) 61. Rb7+ Kg8 62. Rg7+ Kh8 63.
      Rd7 (63. Rd7 Bc4 64. Rxh7+ Kg8 65. g6 $18) 1-0
      
      [Event "Berlin GER"]
      [Site "?"]
      [Date "2012.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Korb, Viktor"]
      [Result "0-1"]
      [WhiteElo "1935"]
      [BlackElo "1625"]
      [PlyCount "72"]
      [EventDate "2012.??.??"]
      
      1. b4 {A00: Irregular Openings} e5 2. Bb2 d6 3. e3 f5 4. d4 e4 5. Nh3 (5. d5
      Nf6 6. c4 Be7 7. Ne2 O-O 8. Nd4 Qe8 9. Nc3 Qg6 10. g3 Nh5 11. Be2 Nf6 12. a4 f4
      13. exf4 Bh3 14. Rg1 Ng4 15. Qc2 Nxh2 16. Nxe4 Bf5 17. Bd3 Na6 18. Bc3 Bf6 19.
      Nxf5 Nf3+ {karoo54 (1610)-smaxmm/kurnik 2012/1-0 (31)}) 5... d5 $146 (5... Nf6
      6. d5 Be7 (6... c6 7. Nc3 Be7 8. Be2 a5 9. b5 c5 10. O-O Nbd7 11. Ng5 Ne5 12.
      Ne6 Bxe6 13. dxe6 Qc8 14. Nd5 Qd8 15. c4 O-O 16. a3 Nxd5 17. Qxd5 Qc7 18. Rad1
      Rad8 19. Rd2 Bf6 20. e7+ {
      1-0 market (2185)-BOMBARDERO (1990)/GameColony.com 2002}) 7. Bxf6 Bxf6 8. c3
      O-O 9. Nf4 Bh4 10. Be2 Qf6 11. O-O b6 12. b5 a6 13. Nd2 Qxc3 14. Rc1 Qf6 15.
      Rxc7 axb5 16. Bxb5 Rxa2 17. Nc4 Na6 18. Ne6 Nxc7 19. Nxf8 Nxb5 20. Ne6 {
      PoPer-snake20/Live Game Caissa's Web 2004/0-1}) 6. a3 Nf6 7. c4 c6 (7... a5 8.
      b5 $14) 8. Nc3 $16 Be6 9. cxd5 cxd5 10. Nf4 (10. Be2 $5 $16) 10... Bf7 $14 11.
      Bb5+ Nbd7 12. Qb3 (12. O-O Bd6 $14) 12... a6 $11 13. Be2 Nb6 14. O-O Bd6 15.
      Nh3 h6 16. a4 (16. Rac1 O-O $11) 16... Rc8 17. Rac1 (17. Rfc1 O-O $11) 17...
      O-O 18. Nb1 (18. Rfe1 $5 $15) 18... Nc4 $17 19. Bc3 Qc7 20. g3 b5 21. axb5 axb5
      22. Na3 Qb8 23. Nxc4 dxc4 24. Qb2 Nd5 25. Nf4 g5 26. Nxd5 Bxd5 27. Ra1 f4 28.
      exf4 (28. Bg4 Rc7 $15) 28... gxf4 $17 29. Bg4 (29. Bd1 Qb7 30. Bh5 Rc7 $19)
      29... Rc7 30. Qe2 (30. Ra6 $142 $5 Rf6 31. Bh3 $19) 30... Rg7 $19 31. f3 $2 (
      31. Ra6 $19) 31... e3 32. Kh1 (32. h3 $19) 32... Rxg4 33. gxf4 (33. Qg2 fxg3
      34. h3 Rh4 $19) 33... Bxf4 (33... Qb7 $142 34. h3 Rg3 35. Ra7 Qxa7 36. Be1
      Rxh3+ 37. Kg2 $19) 34. Rg1 Rxg1+ 35. Rxg1+ Bg5 36. Rg3 Qf4 (36... Qf4 37. Kg1
      Bxf3 38. Rxf3 Qxf3 39. Qxf3 Rxf3 $19) 0-1
      
      [Event "Berlin Lichtenberger op 7th"]
      [Site "?"]
      [Date "2008.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Boeck, Ruediger"]
      [Result "1-0"]
      [WhiteElo "1980"]
      [BlackElo "1605"]
      [PlyCount "61"]
      [EventDate "2008.??.??"]
      
      1. b4 e5 2. Bb2 d6 3. e3 Nf6 4. c4 Bf5 5. Nf3 Nbd7 6. Nc3 g6 7. d4 Bg7 8. Be2
      O-O 9. O-O exd4 $146 (9... e4 10. Nd2 h5 11. f3 Re8 12. fxe4 Nxe4 13. Ndxe4
      Bxe4 14. Nxe4 Rxe4 15. Bf3 Rxe3 16. Bxb7 Rb8 17. Qd2 Qe7 18. Rae1 Bh6 19. Bc6
      Re8 20. Bc3 Rxe1 21. Qxe1 Qxe1 22. Bxe1 Re7 23. Bf2 Nb6 24. c5 {
      Blankenberg,B (1960)-Kleine,J/DESC 2000/1-0 (41)}) (9... a5 $5 10. b5 c5 $11)
      10. Nxd4 $14 Be6 11. Nxe6 fxe6 12. Qd2 Qe7 13. Bf3 (13. f4 Nb6 14. e4 Nfd7 $14)
      13... c6 (13... Ne5 14. Be2 (14. Bxb7 $143 Rab8 15. Ba6 Rxb4 $17) 14... Ned7
      15. Rfd1 $16) 14. b5 (14. e4 Nb6 15. Be2 d5 16. exd5 exd5 $11) 14... Ne5 $11
      15. Be2 c5 (15... d5 $5 16. bxc6 Nxc4 17. Nxd5 exd5 (17... Nxd2 $2 18. Nxe7+
      Kf7 19. Rfd1 $18) (17... Nxd5 $143 18. Bxc4 bxc6 19. Bxg7 Kxg7 20. e4 $14) 18.
      Bxf6 Nxd2 19. Bxe7 Rfe8 20. cxb7 Rab8 $11) 16. a4 Rfd8 17. f4 Ned7 (17... Nf7
      18. e4 Nd7 $16) 18. Bf3 (18. Rfd1 $142 $18) 18... Nb6 $11 19. Qe2 d5 20. cxd5
      exd5 $2 (20... Nfxd5 21. Nxd5 Nxd5 22. Bxg7 Kxg7 23. Qc4 $11) 21. Rad1 (21. a5
      $142 Nc4 22. Nxd5 Nxd5 23. Qxc4 Qxe3+ 24. Kh1 Bxb2 25. Bxd5+ Kh8 26. Rad1 $14)
      21... Nc4 $4 (21... Ne4 $142 22. Nxe4 dxe4 $11) 22. Nxd5 $18 Nxd5 23. Bxd5+ (
      23. Qxc4 $6 Qxe3+ 24. Kh1 Bxb2 25. Bxd5+ Kh8 $16) 23... Rxd5 24. Qxc4 (24. Rxd5
      Nxb2 25. Rd2 Rd8 $15) 24... Qxe3+ (24... Bxb2 25. Rxd5 (25. Qxd5+ $143 Kg7 $18)
      25... Qxe3+ 26. Kh1 $18) 25. Kh1 Bxb2 26. Rxd5 Kh8 27. Rxc5 Rf8 28. Rc8 Qe7 (
      28... Bg7 29. Rxf8+ Bxf8 30. Qf7 $18) 29. Rc7 Qa3 (29... Qd8 30. Rxb7 Bf6 31.
      Rxa7 $18) 30. Rxb7 Bd4 (30... Qc3 31. Qxc3+ Bxc3 32. Rxa7 Bd4 $18) 31. Qc7 (31.
      Qc7 Rf7 32. Qxf7 Qe7 33. Rxe7 Be5 34. Qxh7# {mate}) (31. Qxd4+ Rf6 32. Qxf6+
      Kg8 33. Qg7# {mate}) 1-0
      
      [Event "Berlin GER"]
      [Site "?"]
      [Date "2012.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Jeremic, Nemanja"]
      [Result "0-1"]
      [WhiteElo "1935"]
      [PlyCount "90"]
      [EventDate "2012.??.??"]
      
      1. b4 {A00: Irregular Openings} e5 2. Bb2 d6 3. e3 Nf6 4. c4 g6 5. d4 exd4 6.
      exd4 Bg7 7. Nf3 O-O 8. Be2 Bg4 (8... d5 9. c5 Ne4 10. O-O b6 11. Nc3 bxc5 12.
      bxc5 Nc6 13. Qa4 Rb8 14. Rab1 Bf5 15. Nd1 Ng5 16. Rc1 Re8 17. Ne3 Rxb2 18. Nxg5
      Rxe2 19. Qxc6 R8xe3 20. Nxf7 Qe8 21. Qxd5 Be6 22. Qb7 Bxf7 23. fxe3 {
      Efimov,I (2490)-De la Villa Garcia,J (2460)/Open Saint Vincent ITA 1999 (42)})
      9. O-O d5 $146 (9... Nc6 10. b5 Ne7 11. d5 Nf5 12. Nd4 Bxe2 13. Nxe2 Qd7 14.
      Nd2 Rfe8 15. Ng3 Re7 16. Nf3 Rae8 17. Re1 Nxg3 18. hxg3 Rxe1+ 19. Nxe1 Qe7 20.
      Bxf6 Bxf6 21. Rb1 Qe2 22. Qa4 Bd4 23. Nf3 Bxf2+ 24. Kh1 {
      bluepiramid2 (1620)-chessisok/6370901 kurnik 2011/0-1 (43)}) (9... Re8 10. Nc3
      Nc6 11. b5 Ne7 12. h3 Bf5 13. Re1 c6 14. a4 a6 15. Qb3 Qd7 16. Bf1 h6 17. Rad1
      g5 18. Ne5 Qc8 19. Nd3 Ng6 20. Rxe8+ Nxe8 21. Nb4 a5 22. Nc2 Nh4 23. Ne1 Nf6
      24. Ne2 {Barcza,G-Opocensky,K/Leipzig Inter 1st 1965/1-0 (47)}) 10. h3 Bxf3 11.
      Bxf3 (11. gxf3 $2 Nh5 12. Qd2 Qh4 $19) 11... c6 (11... Nc6 12. b5 Na5 13. Na3
      $11) 12. Nd2 Nbd7 13. Qb3 dxc4 14. Nxc4 Nb6 15. Ne5 Nfd5 (15... a6 16. Rfe1 $16
      ) 16. a4 (16. b5 cxb5 17. Qxb5 Qd6 $16) 16... Nd7 (16... Bxe5 17. dxe5 Qh4 18.
      a5 $16) 17. Nd3 (17. b5 Re8 18. Rfe1 Rc8 $16) 17... N7f6 18. Rac1 Qd6 (18...
      Re8 $5 $14) 19. b5 $16 cxb5 20. axb5 Rac8 $2 (20... Rfe8 $142 $18) 21. Ba3 Qd7
      (21... Qe6 22. Bxf8 Rxc1 23. Rxc1 (23. Nxc1 $6 Bxf8 24. Nd3 Nc7 25. Qxe6 Nxe6
      $18) 23... Bxf8 24. Re1 $18) 22. Bxf8 Rxf8 23. Ne5 (23. Nc5 $142 $5 Qd6 24.
      Nxb7 Qd7 $18) 23... Qd6 24. Rfd1 Nf4 25. Bxb7 $4 (25. Qa2 $142 Nd7 26. Qxa7
      Nxe5 27. dxe5 $18) 25... Ne2+ $14 {Exerts pressure on the isolated pawn} 26.
      Kf1 Nxc1 27. Rxc1 Qxd4 28. Nf3 Qb6 29. Ba6 (29. Bc6 $5 $11) 29... Ne4 $15 30.
      Qe3 $4 (30. Rc2 $142 $15) 30... Ng3+ $3 $19 31. Ke1 (31. fxg3 Qxe3 {Deflection}
      ) 31... Qa5+ 32. Nd2 Nf5 (32... Bh6 $142 33. Qxh6 Re8+ 34. Qe3 Rxe3+ 35. fxe3
      Kg7 $19) 33. Qe2 $4 (33. Qd3 $142 $17) 33... Bh6 $19 34. Rd1 $2 (34. Rc8 Rxc8
      35. Bxc8 $19) 34... Rd8 35. g4 Nd4 36. Qe4 (36. Qd3 Qb4 $19) 36... Nxb5 (36...
      Nb3 $142 37. Kf1 Nxd2+ 38. Rxd2 Rxd2 39. Qe8+ Bf8 40. Qe5 $19) 37. Kf1 (37.
      Bxb5 Qxb5 38. Qc2 Re8+ 39. Ne4 Qb4+ 40. Kf1 Rxe4 41. Rb1 Qc4+ 42. Qxc4 Rxc4 43.
      Rb8+ Kg7 44. Rb5 $19) 37... Nc3 (37... Rxd2 $6 38. Rxd2 Qxa6 39. Rd8+ Bf8 40.
      Qc4 $19) 38. Qc4 (38. Qb7 Nxd1 39. Ne4 Qb6 $19) 38... Nxd1 39. Ne4 Qb6 (39...
      Qe5 $142 40. Bb7 Qh2 41. Bd5 Qxh3+ 42. Ke2 Qxg4+ 43. f3 $19) 40. Qe2 (40. Qb5
      Qxb5+ 41. Bxb5 Bd2 $19) 40... Rd7 (40... Qb1 41. Qe1 Ne3+ 42. fxe3 Qxe4 43. Kf2
      $19) 41. g5 (41. Kg2 Re7 42. Qxd1 Rxe4 $19) 41... Bg7 42. Nf6+ (42. Kg2 Qd4 43.
      Qc2 Nc3 44. Qxc3 Qxc3 45. Nxc3 Bxc3 $19) 42... Bxf6 43. Qe8+ (43. gxf6 Qxf6 44.
      Kg1 $19) 43... Kg7 44. gxf6+ Kxf6 (44... Qxf6 $142 45. Qe1 Qxa6+ 46. Kg2 $19)
      45. Qxd7 (45. Qe2 $19) 45... Qxf2# 0-1
      
      [Event "Lichtenberger Sommer"]
      [Site "?"]
      [Date "2016.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Woelfert, Juergen"]
      [Result "1/2-1/2"]
      [WhiteElo "1870"]
      [BlackElo "1830"]
      [PlyCount "162"]
      [EventDate "2016.??.??"]
      
      1. b4 e5 2. Bb2 d6 3. e3 Nf6 4. c4 b6 5. Nf3 Nbd7 6. Be2 Be7 (6... Bb7 7. O-O
      g6 8. d3 Bg7 9. Qb3 O-O 10. Nbd2 a5 11. a3 Kh8 12. Bc3 axb4 13. axb4 Ng8 14.
      Qb2 f5 15. Ne1 Qe7 16. Bf3 Rxa1 17. Qxa1 Ra8 18. Qb2 Bxf3 19. Ndxf3 Bf6 20. Nc2
      e4 21. dxe4 {Franco Rincon,D (1725)-Prieto Gonzalez,C/ 27th Torneo San Viator
      - Memorial Pepe 2016/1-0 (56)}) 7. O-O O-O 8. d4 exd4 9. Nxd4 $146 (9. Bxd4 c5
      10. bxc5 Nxc5 11. Nbd2 Nfe4 12. Nxe4 Nxe4 13. Bd3 d5 14. cxd5 Qxd5 15. Qc2 Bc5
      16. Bxe4 {1-0 Valpa-Nylson/playchess.de 2002}) 9... Bb7 10. Bf3 d5 (10... Bxf3
      11. Nxf3 Re8 12. a3 $11) 11. a3 (11. Nf5 Bxb4 12. a3 Bc5 $11) 11... Ne5 $11 12.
      cxd5 (12. Nd2 Ne4 13. Bxe4 dxe4 $11) 12... Nxf3+ 13. Nxf3 Nxd5 (13... Qxd5 14.
      Qxd5 Nxd5 15. e4 $15) 14. Nbd2 Bf6 (14... c5 15. bxc5 Bxc5 16. Ne4 $11) 15.
      Bxf6 Qxf6 16. Qc2 Rac8 (16... a5 17. b5 $11) 17. Rac1 Rfe8 18. Qb1 (18. Rfd1 a6
      $11) 18... b5 (18... c5 $5 $15) 19. Ne4 $14 Qg6 (19... Qb6 20. Nc5 $14) 20. Nc5
      Qxb1 21. Rxb1 Nc3 $2 (21... Rb8 $14) 22. Rb2 $4 (22. Nxb7 $142 Nxb1 23. Rxb1
      $18) 22... Bxf3 $11 23. gxf3 Rcd8 (23... Nd5 24. Rc1 $11) 24. Rc2 Nd5 25. Rfc1
      (25. Na6 Re7 $14) 25... f5 (25... Rd6 $142 $5 $11) 26. Na6 $16 Nb6 (26... Kf8
      $142 $5 $16) 27. Nxc7 $18 Re7 28. Nxb5 Rd3 (28... f4 $142 29. e4 Kf8 $18) 29.
      Nxa7 $4 (29. Rc7 $142 Rdd7 30. Rxd7 Rxd7 31. Nd4 $18) 29... Rxa7 $17 30. Rc3 (
      30. Rc5 g6 $17 (30... Raxa3 $143 31. Rxf5 Rab3 32. Rb5 $11) (30... Rdxa3 $143
      31. Rxf5 g6 32. Rb5 $11)) 30... Rxa3 31. Rc6 (31. Rxa3 Rxa3 32. b5 Rb3 $19)
      31... Nd7 (31... Nd5 32. e4 Nf4 33. Rc8+ Kf7 34. R8c7+ Kg6 35. exf5+ Kh6 36.
      Kh1 $19) 32. Rc7 Rab3 33. Rb7 h6 (33... Kf7 34. Kg2 $17) 34. Rcc7 Rb1+ 35. Kg2
      Rbd1 36. f4 Kf8 37. b5 Ke7 38. b6 $2 (38. Rb8 Rd6 $17) 38... Kd8 (38... Rd6 39.
      f3 $19) 39. Rc6 (39. Ra7 $142 Nxb6 40. Rxg7 $15) 39... Rd6 $19 40. Rc2 (40.
      Rbc7 Rxc6 41. Rxc6 Ke7 $19) 40... Rxb6 41. Ra7 (41. Rxb6 Nxb6 42. Rc6 Nc8 $19)
      41... Ke7 42. Kf3 g5 43. fxg5 hxg5 44. Ra5 (44. Kg2 Ke6 $19) 44... Ke6 45. Kg2
      Rd5 (45... Nf6 46. Ra4 $19) 46. Ra8 Nf6 47. Ra3 (47. Rh8 Rb4 $19) 47... Ne4 48.
      Raa2 g4 (48... Rbd6 49. f3 Nf6 50. Re2 $19) 49. f3 (49. h3 gxh3+ 50. Kxh3 Rbd6
      $19) 49... gxf3+ 50. Kxf3 Rd1 (50... Rb1 51. h4 $19) 51. Ra3 (51. h4 Rh1 52.
      Rh2 Rf1+ 53. Ke2 Rbb1 $19) 51... Rd2 52. Raa2 Rxc2 53. Rxc2 Rd6 (53... Rb1 54.
      Ra2 $19) 54. Ke2 (54. h4 Rd1 55. Rh2 Rf1+ 56. Ke2 Ng3+ 57. Kd3 Rf3 $19) 54...
      Ke5 55. Rb2 (55. Kf3 Rh6 $19) 55... Rh6 (55... Nc3+ 56. Kf3 Rh6 57. Kg3 $19)
      56. Kd3 (56. Rb5+ Ke6 57. Kf3 $19) 56... Rd6+ 57. Ke2 Nc3+ 58. Kf3 Rd1 (58...
      Rh6 59. Kg3 $19) 59. Rc2 (59. Rb8 Ne4 $19) 59... Nd5 (59... Rd3 60. Kf2 $19)
      60. Re2 (60. Rc8 Rf1+ 61. Ke2 $19) 60... Nc3 61. Rc2 Rd3 62. Kf2 Ke4 63. h4
      Rxe3 64. h5 Rh3 (64... Kf4 $142 $19) 65. Kg2 Re3 66. Kf2 Nd1+ 67. Kg2 Kd3 (
      67... Kf4 $142 $5 68. Rc4+ Kg5 69. Rd4 $19) 68. Rc7 f4 69. h6 (69. Kf1 Rf3+ 70.
      Kg1 Rg3+ 71. Kf1 Ne3+ 72. Kf2 Ng4+ 73. Kf1 f3 74. Rd7+ Ke4 75. Re7+ Kd4 76.
      Rd7+ Ke5 $19) 69... Re2+ (69... f3+ $142 70. Kf1 f2 71. Rd7+ Kc2 72. Rxd1 Kxd1
      73. Kxf2 $19) 70. Kh3 (70. Kh1 Nf2+ 71. Kg2 Ke3 72. Re7+ Ne4+ 73. Kh3 Re1 $19)
      70... Nf2+ (70... f3 $5 71. Rd7+ Kc2 72. Rf7 $19) 71. Kh4 Re8 72. h7 Ke3 (72...
      Rh8 $142 $19) 73. Re7+ Rxe7 74. h8=Q Re4 (74... f3 $5 $19) 75. Qh6 $17 Nd3 76.
      Qg5 Ne1 (76... Ke2 77. Qd5 Re5 78. Qa2+ Ke3 79. Qa7+ Rc5 80. Qe7+ Kd2 81. Kg4
      $15) 77. Qc5+ (77. Kg4 $5 $11) 77... Ke2 $15 78. Qd5 Ke3 79. Qc5+ Rd4 (79...
      Kf3 $5 $15) 80. Qe5+ $11 Re4 81. Qc5+ Rd4 1/2-1/2
      
      [Event "7th Berlin-ch Seniors"]
      [Site "?"]
      [Date "2011.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Modrow, Reinert"]
      [Result "1/2-1/2"]
      [WhiteElo "1770"]
      [PlyCount "46"]
      [EventDate "2011.??.??"]
      
      1. b4 d6 2. Bb2 e5 3. e3 Nf6 4. c4 Be6 5. d4 exd4 6. exd4 d5 7. c5 g6 (7... c6
      8. Bd3 Be7 9. Nf3 Na6 10. Bxa6 bxa6 11. Qd3 Qc8 12. Nbd2 O-O 13. O-O Bf5 14.
      Qc3 Ne4 15. Nxe4 Bxe4 16. Ne5 f6 17. Nd3 Qf5 18. Rad1 Rab8 19. f3 Bxd3 20. Rxd3
      Qd7 21. Re3 Bd8 22. Rfe1 {kaasparov-hanter2/kurnik 2014/1-0 (55)}) 8. Nf3 Bg7
      9. Bd3 $146 (9. Be2 O-O 10. O-O Nbd7 11. Nbd2 c6 12. Nb3 Qc7 13. Qc2 Rfe8 14.
      Rfe1 Re7 15. Bd3 Rae8 16. Re2 Bg4 17. Rxe7 Rxe7 18. Re1 Rxe1+ 19. Nxe1 Nf8 20.
      h3 Bc8 21. Nf3 Ne6 22. Nc1 Nd7 23. Ne2 a5 {
      Nielsen,J-Pedersen,E/Nakskov 1969/1/2-1/2 (49)}) 9... O-O 10. O-O c6 (10... Re8
      11. Re1 $11) 11. Nbd2 (11. Re1 Re8 $11) 11... Qc7 (11... Nh5 12. Re1 $11) 12.
      a4 {White plans b5} a6 (12... Nh5 13. Re1 $11) 13. b5 (13. Re1 Nbd7 $14) 13...
      axb5 14. axb5 Rxa1 15. Qxa1 cxb5 16. Bxb5 Bd7 17. Bd3 Nc6 18. Bc3 Rb8 19. Rb1
      Nh5 20. Qa2 Nf6 (20... Nf4 21. Bf1 $14) 21. Nb3 (21. Qb2 $5 $14) 21... Ne4 $11
      22. Bxe4 dxe4 23. Ng5 Bf5 1/2-1/2
      
      [Event "Berliner Sommer"]
      [Site "?"]
      [Date "1998.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Hickl, Joerg"]
      [Result "0-1"]
      [WhiteElo "2060"]
      [BlackElo "2540"]
      [PlyCount "50"]
      [EventDate "1998.??.??"]
      
      1. b4 e5 2. Bb2 d6 3. e3 Be7 4. c4 Nf6 5. Nf3 O-O 6. Be2 Re8 7. O-O Bf8 (7...
      e4 8. Nd4 $11 (8. Ne1 d5 (8... Nc6 9. a3 (9. b5 Ne5 10. f3 a6 11. fxe4 $11 {
      0.00/8}) (9. Nc2 Ne5 10. d4 exd3 11. Bxd3 $15 {-0.47/10}) 9... Be6 10. f3 a5
      11. b5 $11 {0.16/9}) (8... c5 9. Nc2 (9. b5 d5 10. f3 d4 11. exd4 $11 {-0.06/9}
      ) (9. bxc5 dxc5 10. f3 Bd6 11. fxe4 $11 {-0.22/8}) 9... cxb4 10. Nxb4 Nc6 11.
      Nd5 $11 {0.06/9}) 9. a3 (9. c5 a5 10. a3 b6 11. cxb6 $15 {-0.41/8}) (9. Qb3 Be6
      10. d3 Nc6 11. a3 $15 {-0.41/7}) 9... a5 10. b5 Nbd7 11. cxd5 $11 {0.00/8})
      8... d5 (8... c5 9. Nc2 (9. bxc5 dxc5 10. Nb3 Bd6 11. f3 $15 {-0.28/8}) 9...
      cxb4 10. Nxb4 Nc6 11. Nd5 $11 {0.06/9}) (8... Bd7 9. f3 (9. a3 c5 10. Nb3 Nc6
      11. b5 $11 {0.03/9}) (9. d3 c5 10. Nc2 cxb4 11. Nxb4 $11 {0.03/8}) 9... c5 10.
      Nc2 Be6 11. fxe4 $11 {0.22/8}) 9. Nc3 (9. a3 a5 10. c5 b6 11. Bb5 $11 {-0.12/8}
      ) (9. c5 a5 10. a3 b6 11. Bb5 $11 {-0.12/8}) 9... Bxb4 10. Nxd5 Bd6 11. f3 $11
      {0.00/8}) (7... c5 8. bxc5 e4 9. Ne1 (9. Ng5 h6 10. cxd6 Bxd6 11. Nh3 $15 {
      -0.28/8}) (9. cxd6 exf3 10. dxe7 Qb6 11. Bxf3 $17 {-0.78/10}) 9... dxc5 10. f3
      Bd6 11. fxe4 $11 {-0.22/8}) (7... c6 8. d3 (8. d4 e4 (8... Nbd7 9. Nc3 (9. dxe5
      ) (9. Qb3) 9... Qb6 10. a3 a5 11. b5 $14 {0.28/8}) (8... a5 9. b5 (9. dxe5 dxe5
      10. b5 e4 11. Nd4 $11 {-0.12/8}) (9. Qa4) 9... e4 10. Nfd2 cxb5 11. cxb5 $11 {
      0.16/11}) 9. Nfd2 (9. Ne1 d5 10. c5 b6 11. Nc3 $15 {-0.28/10}) 9... d5 10. a3
      a5 11. bxa5 $11 {-0.06/9}) (8. a3 a5 (8... e4 9. Nd4 (9. Ne1 d5 10. cxd5 Nxd5
      11. Nc3 $11 {-0.12/8}) 9... c5 10. Nb3 cxb4 11. axb4 $11 {0.06/9}) (8... Bg4 9.
      Nc3 (9. h3) (9. Ng5) 9... Nbd7 10. d4 e4 11. Nd2 $11 {0.16/10}) 9. Nc3 (9. d4
      e4 10. Nfd2 axb4 11. axb4 $11 {-0.25/10}) (9. d3 axb4 10. axb4 Rxa1 11. Bxa1
      $11 {-0.09/8}) 9... axb4 10. axb4 Rxa1 11. Qxa1 $11 {-0.06/8}) 8... Bg4 (8...
      Qb6 9. Bc3 (9. a3 Bg4 10. Nc3 Nbd7 11. h3 $11 {0.03/9}) (9. Qd2 Bf5 10. a4 a5
      11. b5 $11 {-0.09/9}) 9... Be6 10. a4 Qc7 11. Nbd2 $11 {0.06/9}) (8... Bf5 9.
      Nc3 (9. e4 Bg4 10. h3 Bh5 11. Nc3 $11 {-0.06/8}) (9. a3) 9... d5 10. Nxe5 Bxb4
      11. Qb3 $11 {0.16/8}) 9. Nc3 (9. a4 Nbd7 10. h3 Be6 11. d4 $11 {-0.12/8}) (9.
      a3 Qb6 10. Nc3 Nbd7 11. h3 $11 {0.03/9}) 9... Qb6 10. a3 Nbd7 11. h3 $11 {
      0.03/9}) 8. d4 (8. d3 a6 $11 (8... Be7 9. Nc3 (9. a3 a5 10. Nc3 Qd7 11. b5 $11
      {0.13/9}) (9. Nbd2 a5 10. a3 Bd7 11. b5 $11 {0.16/10}) 9... a5 10. b5 Nbd7 11.
      d4 $11 {0.25/9}) (8... a5 9. a3 (9. b5 a4 10. a3 Nbd7 11. d4 $11 {0.19/10}) (9.
      Qa4 Nbd7 10. a3 Be7 11. Nbd2 $11 {0.19/8}) 9... Be7 10. b5 c6 11. Nc3 $11 {
      0.22/9}) (8... Nbd7 9. Nbd2 (9. a3 a5 10. b5 c6 11. Nc3 $11 {0.19/9}) (9. Nc3
      d5 10. c5 Be7 11. d4 $11 {0.09/9}) 9... Qe7 10. a3 a5 11. Qc2 $11 {0.22/9}) 9.
      a3 (9. Nc3 Nc6 10. a3 d5 11. d4 $11 {0.19/8}) (9. Nbd2 Nc6 10. a3 Qe7 11. d4
      $11 {0.16/9}) 9... Nc6 10. Nc3 d5 11. d4 $11 {0.19/8}) (8. a3 Be7 (8... e4 9.
      Nd4 (9. Ne1 d5 10. f3 a5 11. b5 $11 {0.22/7}) 9... a5 10. d3 c5 11. Nc2 $14 {
      0.28/8}) (8... a5 9. b5 (9. d4 e4 10. Nfd2 axb4 11. axb4 $11 {-0.03/11}) (9.
      Qa4 Nbd7 10. d4 e4 11. Nfd2 $11 {0.03/10}) 9... Qe7 10. Nc3 Qd7 11. d4 $14 {
      0.31/10}) 9. d4 (9. Nc3 a5 10. d4 axb4 11. axb4 $11 {0.09/9}) (9. d3 a5 10. b5
      Bg4 11. Ng5 $11 {0.13/9}) 9... exd4 10. Nxd4 a5 11. Nd2 $11 {0.22/9}) 8... e4 (
      8... exd4 9. Nxd4 (9. exd4 d5 10. c5 b6 11. Ne5 $11 {0.03/8}) (9. Bxd4 Nc6 10.
      Bc3 Ne4 11. b5 $11 {0.06/10}) 9... c5 (9... g6 10. a3 (10. h3 $14 Bg7 11. a3
      $14 {0.31/9}) 10... Bg7 11. Nc3 $14 {0.44/10}) 10. Nc2 Nc6 11. a3 $11 {0.22/8})
      (8... Nbd7 9. dxe5 (9. Nc3 a5 10. a3 e4 11. Nd2 $11 {0.19/9}) (9. a3 e4 10.
      Nfd2 d5 11. Nc3 $14 {0.28/10}) 9... dxe5 10. c5 a5 11. a3 $14 {0.28/9}) (8...
      Qe7 9. Nc3 (9. a3 exd4 10. Nxd4 a5 11. Nc3 $14 {0.28/10}) (9. d5 a5 10. a3 axb4
      11. axb4 $11 {0.13/11}) 9... a5 10. b5 Bf5 11. Rc1 $14 {0.31/8}) 9. Nfd2 (9.
      Ne1 d5 10. c5 b6 11. Qc2 $11 {0.00/9}) 9... c6 (9... a5 10. b5 $11 Bf5 11. Nc3
      $14 {0.38/10}) (9... d5 10. a3 a5 11. b5 $11 {0.16/9}) 10. Nc3 $14 d5 (10...
      Na6 11. b5 cxb5 12. Nxb5 $14) 11. Qb3 (11. a3 Be6 $14) 11... Be6 12. cxd5 (12.
      b5 Nbd7 $14) 12... cxd5 13. b5 (13. Na4 Nbd7 $14) 13... Nbd7 $11 14. Rfc1 (14.
      Ba3 Rc8 $11) 14... Bd6 (14... Qa5 15. Qd1 $11) 15. Nf1 (15. Ba3 Nb6 $11) 15...
      h5 (15... Rc8 16. Nd2 $11) 16. a4 (16. h3 Rc8 $11) 16... Nf8 (16... Nb6 17. Ba3
      $15) 17. Ba3 Bc7 (17... Ng6 18. a5 $11) 18. Qd1 (18. Rc2 Rc8 $11) 18... h4 (
      18... Bg4 $142 $11) 19. f4 (19. h3 $142 $11) 19... exf3 $17 20. Bxf3 (20. gxf3
      Ng6 $17) 20... h3 21. Qe2 (21. Ra2 Rc8 $19) 21... N8h7 $19 22. Qf2 (22. Ng3 Rc8
      $19) 22... Ng5 23. Ng3 Rc8 24. Nce2 $4 (24. Bc5 $19) 24... hxg2 25. Bxg2 (25.
      Qxg2 Bh3 26. Qf2 Ng4 27. Bxg4 Bxg4 $19) 25... Ng4 (25... Ng4 26. Qe1 Nxe3 $19)
      0-1
      
      [Event "Berlin op"]
      [Site "?"]
      [Date "2002.??.??"]
      [Round "2"]
      [White "Koerner, Helmut"]
      [Black "Krug, Peter"]
      [Result "0-1"]
      [WhiteElo "1805"]
      [BlackElo "2195"]
      [PlyCount "54"]
      [EventDate "2002.??.??"]
      
      1. b4 {A00: Irregular Openings} e5 2. Bb2 e4 3. c4 Nf6 4. a3 a5 5. b5 Be7 (5...
      Bc5 6. e3 O-O 7. Nc3 Re8 8. Nge2 d6 9. Ng3 Nbd7 10. Qc2 Qe7 11. Be2 c6 12. f3
      exf3 13. gxf3 Ne5 14. Nce4 Nxe4 15. Qxe4 Qd8 16. Qc2 Qh4 17. O-O-O Ng6 18. bxc6
      bxc6 19. Ne4 Bf5 20. Qc3 {
      Lapshun,Y (2475)-Papp,G (2425) FSGM August, Budapest HUN 2007 0-1 (46)}) (5...
      c6 6. e3 Bc5 7. d4 Be7 8. Nc3 O-O 9. d5 cxd5 10. Nxd5 Nxd5 11. Qxd5 Bf6 12. Bd4
      Re8 13. Ne2 d6 14. Rd1 Qc7 15. Bxf6 gxf6 16. Nc3 Be6 17. Qxd6 Qxd6 18. Rxd6 Nd7
      19. Nxe4 f5 20. Rxd7 {pierre-elixir internet 2010 1-0}) 6. Nc3 O-O 7. Qc2 $146
      (7. e3 d5 (7... c6 8. d3 d5 9. cxd5 cxd5 10. dxe4 dxe4 11. Nge2 Bf5 12. Ng3 Bg6
      13. Nce2 a4 14. Nf4 Qa5+ 15. Qd2 Qxd2+ 16. Kxd2 Rd8+ 17. Ke1 Nbd7 18. h4 h5 19.
      Nxg6 fxg6 20. Bc4+ Kh7 21. Ke2 Nc5 22. Rad1 {
      Bonetti,S-Marko,M (2225) corr MDK Malbork 2007 1/2 (33)}) 8. cxd5 Bf5 9. d3
      Nbd7 10. Nge2 Nc5 11. Ng3 Bg6 12. dxe4 Nfxe4 13. Be2 Bf6 14. Rc1 Re8 15. Ngxe4
      Bxe4 16. Nxe4 Nxe4 17. Bxf6 Nxf6 18. O-O Qd6 19. a4 Rad8 20. Bf3 Rd7 21. Qd2
      Qb6 {Pleschke,H-Luzuriaga,N 1. B4 Thementurnier 2000 (48)}) 7... d5 8. cxd5 Bf5
      9. e3 Nbd7 10. d4 {White is behind in development.} Nb6 {
      Will d5 fall?. Black threatens to win material: Nb6xd5. The knight blocks b5}
      11. Nge2 Bd6 {The black bishop is safe in front of d5} 12. Ng3 {
      e4 seems the pivot of the position. White threatens to win material: Ng3xf5}
      Bg6 13. Qb3 (13. Bc1 Nbxd5 14. Nge2 Nxc3 15. Nxc3 Qe7 $11) 13... Re8 (13...
      Nbxd5 14. Bc4 Bxg3 15. hxg3 $14) 14. Be2 (14. Bc4 a4 15. Qa2 Bxg3 16. fxg3 Qd6
      $11) 14... h5 (14... Nfxd5 15. Rc1 $11) 15. a4 (15. Nf1 $5 $14 {
      should be investigated more closely}) 15... h4 {
      Black threatens to win material: h4xg3} 16. Nf1 Nfxd5 17. Nxd5 Nxd5 {
      The knight feels good on d5} 18. Nd2 (18. Ba3 Bxa3 19. Rxa3 c5 20. bxc6 bxc6
      $11) 18... Qg5 19. g3 {Secures f4} c6 (19... Bb4 20. Ba3 $11) 20. Ba3 Bb4 21.
      Bxb4 axb4 (21... Nxb4 22. Rb1 $11) 22. bxc6 bxc6 {
      White has a new passed pawn: a4. Black has a new passed pawn: b4} 23. Nc4 Nc3 {
      White cannot castle queen side} 24. Qxb4 (24. Bf1 $5 {is worth consideration}
      hxg3 25. hxg3 $11 (25. fxg3 $2 c5 $19)) 24... Nxe2 $15 25. Kxe2 {
      White loses the right to castle} Bh5+ 26. Kd2 Red8 {
      Black threatens to win material: Rd8xd4} 27. Rhg1 $4 (27. gxh4 $142 {
      would bring relief} Qf5 28. Kc1 $15) 27... Rxd4+ (27... Rxd4+ 28. Kc2 c5 $19)
      0-1
      
      [Event "Berlin"]
      [Site "?"]
      [Date "2006.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Koenig, Peter"]
      [Result "1/2-1/2"]
      [WhiteElo "1810"]
      [BlackElo "1970"]
      [PlyCount "105"]
      [EventDate "2006.??.??"]
      
      1. b4 e5 2. Bb2 f6 3. e4 Nh6 4. Bc4 (4. a3 a5 $11) 4... c6 (4... Bxb4 5. Qh5+
      Kf8 6. c3 $15) 5. Nc3 (5. a3 d5 6. exd5 cxd5 $11) 5... g6 (5... Bxb4 $142 $5 6.
      Qh5+ Ke7 $15) 6. a3 (6. b5 Nf7 $14) 6... Bg7 (6... b5 7. Bb3 $14) 7. Nf3 Nf7 (
      7... f5 8. d3 $14) 8. Bxf7+ (8. O-O f5 $14) 8... Kxf7 $14 9. d4 d6 (9... d5 10.
      O-O Re8 11. Qd3 $14) 10. dxe5 (10. O-O Rf8 $14) 10... dxe5 $11 11. O-O (11. Qe2
      Be6 $14) 11... Be6 (11... Qxd1 12. Rfxd1 Bg4 13. Rd3 $11) 12. Qe2 Nd7 (12...
      Qe7 13. Rfd1 $11) 13. Rfd1 Qc7 14. Nd2 b5 (14... Rhd8 15. Nc4 $11) 15. Nb3 Rhd8
      16. Bc1 Bf8 17. Be3 Be7 (17... Kg7 18. Qf3 $11) 18. f3 (18. Qf3 Kg8 $14) 18...
      a6 (18... Kg7 19. Qf2 $11) 19. Rac1 (19. Qf2 Kg8 $14) 19... Nb6 20. Na5 (20.
      Nc5 Bxc5 21. Bxc5 a5 $11) 20... c5 (20... Rxd1+ 21. Rxd1 c5 22. Qf2 cxb4 23.
      Nxb5 axb5 24. Bxb6 $15) 21. Qf2 (21. Rxd8 Rxd8 22. Qf2 Rc8 $11) 21... cxb4 $15
      {Black is in command} 22. Nxb5 (22. Bxb6 $2 Qxc3 23. axb4 Bxb4 $19) 22... axb5
      23. Bxb6 Qc3 24. axb4 Bxb4 {Opening the a-file gets Black a lot of play} 25.
      Nb7 Rxd1+ (25... Rdb8 $142 26. Nd6+ Ke7 27. Nxb5 Qc6 $19) 26. Rxd1 $15 Ra2 (
      26... Bc8 27. Nd8+ Kg7 $17) 27. Nd8+ $14 Ke7 28. Nxe6 (28. Qh4 Bc5+ 29. Kh1 $18
      ) 28... Kxe6 $15 29. f4 (29. Qg3 Qxc2 30. Qh3+ f5 31. exf5+ Kf6 $11 (31... gxf5
      $4 32. Qh6+ Ke7 33. Qxh7+ Ke6 34. Qg8+ Kf6 35. Bd8+ Be7 36. Rd6#)) 29... Ra1 {
      The mate threat is Rxd1} 30. f5+ Ke7 31. Qe2 (31. Rxa1 $5 Qxa1+ 32. Qf1 $17)
      31... Bc5+ $17 32. Bxc5+ Qxc5+ 33. Kf1 Rxd1+ 34. Qxd1 Qc4+ (34... gxf5 35. exf5
      Qc4+ 36. Kf2 Qf4+ 37. Qf3 Qh4+ 38. Ke2 Qxh2 39. Qg4 $17) 35. Qe2 Qxe2+ 36. Kxe2
      gxf5 37. exf5 Kd6 38. g4 h6 (38... Kd5 39. Ke3 b4 40. h4 $11) 39. Ke3 (39. Kd3
      Kd5 $15) 39... Kd5 (39... b4 40. Ke4 $11) 40. h4 (40. c3 Kc4 $11) 40... b4 41.
      Kf3 e4+ 42. Kf4 (42. Ke2 $142 $11) 42... Kd4 $19 43. g5 hxg5+ 44. hxg5 fxg5+
      45. Kxg5 e3 46. f6 e2 47. f7 e1=Q 48. f8=Q Qd2+ (48... Qe5+ 49. Kh6 Qe6+ 50.
      Kg5 $19) 49. Kg4 (49. Kh4 $142 Qh2+ 50. Kg5 Qe5+ 51. Kh6 Qe6+ 52. Kh5 $19)
      49... Kc3 (49... Qe2+ $142 50. Kg5 Kc3 $19) 50. Qc5+ Kb2 51. Qc4 Qc3 52. Qe4
      Qg7+ 53. Kh5 (53. Kf3 Qf6+ 54. Kg4 Qd6 $15) 1/2-1/2
      
      [Event "corr SOK-87-08"]
      [Site "?"]
      [Date "1987.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Stabenow, Juergen"]
      [Result "1-0"]
      [PlyCount "21"]
      [EventDate "1987.??.??"]
      
      1. b4 e5 2. Bb2 f6 3. b5 d5 4. e3 Bd6 5. c4 Ne7 6. Nf3 Bg4 7. Be2 dxc4 8. Qc2
      c6 (8... Qd7 9. Qxc4 (9. Bxc4 a6 (9... Bxf3 10. gxf3 a6 11. Qb3 axb5 12. Bxb5
      c6 13. Bc4 $15 {-0.28/10}) 10. Nc3 (10. bxa6 Nxa6 11. Nc3 Bxf3 12. gxf3 Qh3 13.
      Ke2 $15 {-0.44/7}) 10... axb5 11. Nxb5 Nbc6 12. d4 Bxf3 13. gxf3 $15 {-0.37/8})
      9... Bf5 10. Nc3 (10. d4 e4 11. Nfd2 Be6 12. Qa4 f5 13. Nb3 $11 {0.09/8}) (10.
      O-O a6 11. Nc3 axb5 12. Nxb5 Nbc6 13. d4 $11 {0.13/8}) 10... Be6 11. Qe4 c5 12.
      O-O f5 13. Qc2 $11 {0.19/9}) (8... Nd7 9. Qxc4 Bf5 10. e4 Bg6 11. Qc2 Nd5 12.
      d3 Nf4 13. O-O $15 {-0.31/9}) 9. a4 (9. Qxc4 Bf5 $11 (9... Qc8 10. Nc3 (10. d4
      e4 11. Nfd2 Bxe2 12. Qxe2 f5 13. Ba3 $11 {0.03/9}) 10... Be6 11. Qa4 Nd5 12.
      Ne4 Be7 13. d4 $11 {0.06/7}) 10. e4 Bg6 11. O-O a6 12. a4 axb5 13. axb5 $11 {
      -0.06/10}) 9... Nd7 (9... cxb5 10. axb5 Nd7 11. Qxc4 Bf5 12. Nc3 Nb6 13. Qb3
      $17 {-0.72/9}) (9... Nd5 10. h3 (10. Bxc4 Nb4 11. Qb3 e4 12. Nd4 Nd7 13. Bf7+
      $15 {-0.34/7}) 10... Be6 11. Bxc4 Nb4 12. Qc3 Qd7 13. O-O $15 {-0.28/8}) 10.
      Qxc4 Nc5 $4 (10... Bf5 $142 $15 11. O-O cxb5 12. axb5 Nb6 13. Qb3 $11 {-0.19/8}
      ) 11. Qxg4 $18 1-0
      
      [Event "?"]
      [Site "?"]
      [Date "1989.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Schiedeck"]
      [Result "1-0"]
      [PlyCount "71"]
      [EventDate "1989.??.??"]
      
      1. b4 d5 2. Bb2 f6 3. e3 e5 4. b5 Be6 5. Nf3 Bc5 6. d4 exd4 (6... Bb4+ 7. Bc3
      Bxc3+ 8. Nxc3 $11) 7. Nxd4 Bf7 (7... Qd7 8. Nxe6 Qxe6 9. c4 $14) 8. Nd2 Ne7 (
      8... Nd7 9. Bd3 $14) 9. c4 (9. Bd3 a6 $14) 9... O-O 10. Qg4 Qd7 11. Qg3 a6 12.
      a4 dxc4 13. Bxc4 axb5 (13... Bxc4 14. Nxc4 Bxd4 15. exd4 axb5 16. axb5 Rxa1+
      17. Bxa1 Qxb5 18. Qd3 $17) 14. Nxb5 (14. Bxb5 Bd6 15. Ne4 Bxg3 16. Bxd7 Bxf2+
      17. Kxf2 Nxd7 $17) 14... Na6 (14... Bxc4 15. Nxc4 Bb4+ 16. Ke2 $15) 15. Bxf7+ (
      15. Bxf6 $5 Nf5 16. Qg4 $14) 15... Rxf7 $11 16. Ne4 Bb4+ {
      Black gets strong initiative} 17. Ke2 (17. Bc3 Nf5 18. Qf3 Bxc3+ 19. Nexc3 Nc5
      $11) 17... Nf5 18. Qf3 c6 19. Rhd1 Qe6 20. Nd4 Nxd4+ 21. Rxd4 Qb3 22. Rb1 $4 (
      22. Bc1 c5 23. Nd2 Qc3 24. Rxb4 Nxb4 $19 (24... Qxa1 $6 25. Rxb7 Rd8 26. Bb2
      Qxa4 27. Bc3 $19) (24... cxb4 $6 25. Rb1 $19) (24... Qxb4 $6 25. e4 $19)) 22...
      Qxa4 (22... Qc2+ $142 23. Nd2 Bxd2 $19) 23. Kf1 $15 c5 24. Rd6 c4 25. Nxf6+ $2
      (25. Nc3 $5 Qc2 26. Qd1 Qxd1+ 27. Rdxd1 $17) 25... gxf6 (25... Rxf6 26. Bxf6
      Bxd6 27. Qd5+ Kh8 28. Qxd6 $17) 26. Rxf6 (26. Qg4+ Kf8 27. Qxc4 b5 $19) 26...
      Rxf6 (26... Qa2 27. Qg4+ Kf8 28. Rxf7+ Kxf7 29. Qf5+ Ke7 30. Qxh7+ Kd6 31. Qg6+
      Kc5 $11) 27. Qxf6 $17 {Do you see the mate threat?} c3 28. Bxc3 (28. Qe6+ Kf8
      29. Qf5+ Ke8 30. Qe4+ Kd8 31. Bxc3 Qb5+ 32. Kg1 Rc8 33. Qd4+ Qd7 34. Qf6+ Qe7
      35. Qh8+ Qf8 36. Qd4+ Ke8 37. Bxb4 Qxb4 38. Qh8+ Qf8 39. Qe5+ Qe7 40. Qh8+ Kd7
      41. Rd1+ Kc7 $11) 28... Bxc3 29. Qxc3 b5 30. Qf6 Qc4+ 31. Kg1 Nc7 32. h4 (32.
      Qg5+ Kf8 $17) 32... Rf8 (32... Qe4 33. Qg5+ Kf8 34. Rc1 $17) 33. Qg5+ $17 Kf7
      34. Rd1 Ne6 $4 (34... Qc6 $142 $17) 35. Rd7+ Ke8 36. Qe7# 1-0
      
      [Event "corr SOK-87-08"]
      [Site "?"]
      [Date "1988.??.??"]
      [Round "?"]
      [White "Diener, Rudolf"]
      [Black "Koerner, Helmut"]
      [Result "1-0"]
      [PlyCount "53"]
      [EventDate "1988.??.??"]
      
      1. b4 e5 2. Bb2 f6 3. e4 Bxb4 4. Bc4 Nc6 5. a3 Ba5 6. Bxg8 Rxg8 7. Qh5+ Kf8 8.
      Qxh7 d5 9. Ne2 dxe4 10. Qxe4 Be6 11. Nbc3 Qd7 12. O-O-O (12. f4 Ke8 $11) 12...
      Qe7 (12... Ke8 13. f4 $15) 13. g4 (13. Nd5 $5 Qc5 14. Ndf4 $11) 13... Rd8 14.
      Rhg1 Bb6 15. Rg2 Bc5 {Exerts pressure on the isolated pawn} 16. a4 Ba3 (16...
      Ke8 $5 $17) 17. f4 $15 Bxb2+ 18. Kxb2 Na5 (18... Rh8 $5 $11) 19. d3 $14 c6 20.
      fxe5 b5 (20... Ke8 $5 $16) 21. exf6 gxf6 22. Nf4 Bd5 23. Qxe7+ Kxe7 24. Nfxd5+
      cxd5 25. Re1+ Kf7 26. Nxb5 Rb8 27. Kc3 (27. Kc3 Nc6 28. Nd6+ Kf8 29. h4 $18)
      1-0
      
      [Event "?"]
      [Site "?"]
      [Date "1997.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Voss"]
      [Result "0-1"]
      [PlyCount "60"]
      [EventDate "1997.??.??"]
      
      1. b4 e5 2. Bb2 f6 3. e4 Bxb4 4. Bc4 Nc6 5. f4 Qe7 6. f5 g6 7. c3 Ba5 8. Qb3
      Nh6 9. fxg6 hxg6 10. Na3 Ng4 11. Nf3 (11. Nh3 Bb6 $17 (11... f5 12. Bd5 (12.
      exf5 gxf5 13. Bd5 Rxh3 14. Bxc6 Rh8 15. Bd5 c6 $19 {-2.06/9}) 12... Qh4+ 13.
      Kd1 Nf6 14. exf5 gxf5 15. Bf3 e4 $19 {-1.53/9}) 12. Bb5 (12. Rb1 Na5 (12... d6
      13. Bb5 f5 14. Qa4 Bd7 15. exf5 gxf5 $19 {-1.50/8}) (12... f5 13. exf5 gxf5 14.
      Bd5 Qh4+ 15. Kd1 Na5 $19 {-1.66/9}) (12... Qh7 13. Kd1 d6 14. Be6 Qh5 15. Kc1
      Ne3 $19 {-1.88/8}) (12... Nh6 13. d3 d6 14. Nf2 Bxf2+ 15. Kxf2 Ng4+ $19 {
      -1.50/9}) 13. Qb4 d6 14. Be2 f5 15. Kd1 Nc6 $19 {-1.97/7}) (12. Bd5 Na5 13. Qc2
      c6 14. Bb3 f5 15. Ke2 d6 $19 {-2.03/8}) (12. Rc1 Na5 (12... d6 13. Bb5 f5 14.
      exf5 Qh4+ 15. Kd1 Bxf5 $19 {-1.56/8}) (12... f5 13. exf5 gxf5 14. Bb5 Qh4+ 15.
      Kd1 Nf6 $19 {-1.56/8}) 13. Qb4 d6 14. Be2 f5 15. exf5 Bxf5 $19 {-1.81/7}) (12.
      Bc1 f5 (12... d6 13. d3 Na5 14. Qc2 Qh7 15. Kd1 Qh5 $19 {-1.84/8}) 13. exf5
      gxf5 14. Bd5 e4 15. Nc4 Rxh3 $19 {-2.59/8}) 12... a6 (12... Qh7 13. O-O-O Qh4
      14. Rdf1 a6 15. Ba4 Bf2 $17 {-1.31/8}) (12... Na5 13. Qb4 c6 14. Qxe7+ Kxe7 15.
      Be2 d6 $19 {-1.44/10}) (12... f5 13. exf5 Qh4+ 14. Kd1 gxf5 15. Nc4 Bf2 $17 {
      -1.25/8}) (12... Bc5 13. Nc2 f5 14. exf5 gxf5 15. O-O-O a6 $17 {-1.25/8}) (
      12... Rb8 13. Nc4 Bc5 14. Ba3 a6 15. Bxc6 dxc6 $17 {-1.31/8}) 13. Be2 f5 14.
      O-O-O Na5 15. Qc2 d6 $19 {-1.63/8}) (11. Be2 f5 12. exf5 (12. h4 Bb6 (12... d6
      13. Bxg4 fxg4 14. g3 Bb6 15. Nc4 Be6 $19 {-1.50/9}) 13. Bxg4 fxg4 14. Ne2 d6
      15. g3 g5 $19 {-1.94/9}) 12... gxf5 13. Nh3 d6 14. Bb5 Qh4+ 15. Kd1 Bb6 $19 {
      -1.53/8}) 11... Bb6 (11... d6 12. h3 (12. Nc2 Bb6 13. Bb5 Bd7 14. Rf1 f5 15.
      exf5 gxf5 $19 {-1.69/8}) (12. Bc1 Bb6 (12... a6 13. h3 f5 14. d3 Bb6 15. Bg5
      Qd7 $17 {-1.28/8}) 13. d3 Na5 14. Qc2 Bf2+ 15. Ke2 c6 $19 {-1.59/9}) 12... f5
      13. Bd5 Bb6 14. Nc4 Nf2 15. Nxb6 Nd3+ $17 {-1.25/7}) (11... f5 12. Bd5 (12.
      exf5 gxf5 (12... e4 13. Nd4 Nxd4 14. cxd4 e3 15. Bc3 exd2+ $19 {-1.59/7}) 13.
      Nc2 Bb6 14. Ba3 Qg7 15. h4 Nf2 $19 {-2.22/8}) (12. Qc2 Bb6 (12... d6 13. Bb5
      Bb6 14. Nc4 Bc5 15. Na5 Bd7 $17 {-0.94/7}) 13. Bd5 Nf6 14. d3 Nxd5 15. exd5 Na5
      $17 {-1.34/9}) 12... Bb6 (12... Qc5 13. Rf1 Nxh2 14. Nxh2 Rxh2 15. Nc4 Qe7 $15
      {-0.31/7}) 13. Nc4 Bf2+ 14. Ke2 Bc5 15. Ba3 Bxa3 $17 {-1.00/7}) 12. Rf1 $2 (12.
      Qc2 $142 $5 $17 d6 (12... Bc5 13. Nb5 d6 14. h3 a6 15. Na3 f5 $19 {-1.53/8}) (
      12... f5 13. Bd5 d6 14. Nc4 Bf2+ 15. Ke2 Bc5 $17 {-1.28/7}) (12... a6 13. h3 f5
      14. Rf1 Nf6 15. Ng5 Rf8 $17 {-1.25/8}) 13. h3 f5 14. Rf1 Nf6 15. exf5 gxf5 $19
      {-1.56/9}) 12... Nxh2 $19 13. Nxh2 Rxh2 14. O-O-O (14. g3 d6 15. Bb5 Qf7 $19)
      14... d6 (14... Rxg2 15. Rh1 Qg7 16. d4 $19) 15. d4 (15. Rh1 Rxh1 (15... Rxg2
      16. Rh8+ Kd7 17. Rdh1 Rg1+ 18. Rxg1 Bxg1 19. Qd1 $14) 16. Rxh1 Qg7 $19) 15...
      Bg4 16. Rd2 O-O-O 17. Rdf2 Rf8 18. Be2 (18. Bb5 exd4 19. Bxc6 bxc6 20. cxd4
      Qxe4 $19) 18... Bxe2 19. Rxe2 exd4 20. cxd4 Bxd4 21. Qg3 Bxb2+ (21... Qe5 22.
      Qg4+ f5 23. Qxg6 Qc5+ 24. Rc2 Bxb2+ 25. Kxb2 Qb4+ 26. Ka1 Qxa3 27. Qg7 $19) 22.
      Rxb2 Qe5 23. Qxg6 Qc3+ (23... f5 $5 24. Rd2 Ne7 25. Qg5 $19) 24. Nc2 Ne5 25.
      Qf5+ Kb8 26. Rb3 Qc4 (26... Qa5 27. Ra3 Qb5 28. Rb3 $19) 27. Kb1 Rh5 $1 (27...
      Rxg2 $6 28. Ne3 Rg5 29. Nxc4 Rxf5 30. Rxf5 Nxc4 31. Kc1 $17) 28. Qxh5 (28. Qf4
      Rh4 $1 29. Qxh4 Qxf1+ 30. Qe1 Qxg2 $19) 28... Qxf1+ 29. Kb2 Nd3+ 30. Ka3 (30.
      Kc3 Nc5 31. Qf3 Qxf3+ 32. gxf3 Nxb3 33. axb3 $19) 30... Qc1+ (30... Qc1+ 31.
      Ka4 Qxc2 $19) 0-1
      
      [Event "corr"]
      [Site "?"]
      [Date "1985.??.??"]
      [Round "?"]
      [White "Grund, Karl"]
      [Black "Koerner, Helmut"]
      [Result "0-1"]
      [PlyCount "72"]
      [EventDate "1985.??.??"]
      
      1. b4 e5 2. Bb2 f6 3. e4 Bxb4 $15 4. Bc4 Qe7 5. Ne2 Nh6 6. O-O Nf7 7. c3 Ba5 (
      7... Bc5 8. d4 Bb6 9. a4 $15) 8. d4 (8. Ba3 Nd6 $11) 8... Bb6 $15 9. Ng3 d6 10.
      a4 a5 11. Qb3 O-O 12. Kh1 Kh8 13. Nd2 Ng5 (13... Nc6 $5 14. d5 Nb8 $15) 14. f4
      $11 exf4 15. Rxf4 Be6 16. d5 (16. h4 $142 $5 Bxc4 17. Nxc4 $14) 16... Bc8 17.
      Nf5 Bxf5 18. Rxf5 (18. exf5 $5 Na6 19. Rff1 $15) 18... Nxe4 $17 19. Nxe4 Qxe4
      20. Raf1 Nd7 21. R5f4 Qg6 22. Qd1 Ne5 23. Be2 Be3 24. Rh4 (24. Rf5 Rab8 $17)
      24... Bg5 25. Rh3 Qf7 26. c4 Rae8 27. Bxe5 Rxe5 28. Bd3 g6 (28... h6 $5 $19)
      29. Qb1 $17 Kg7 30. Qxb7 Be3 31. Qb5 Bb6 32. Qb1 Rfe8 33. Rhf3 Re3 34. Qa1 Rxf3
      35. Rxf3 Re5 36. Qf1 $4 (36. Rf1 $142 $17) 36... Qe7 $19 (36... Qe7 37. c5 Bxc5
      $19) 0-1
      
      [Event "corr"]
      [Site "?"]
      [Date "1985.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Breitenstein"]
      [Result "1-0"]
      [PlyCount "21"]
      [EventDate "1985.??.??"]
      
      1. b4 e5 2. Bb2 f6 3. e4 Bxb4 4. Bc4 Ne7 5. Qh5+ g6 6. Qh4 g5 7. Qh6 Ng6 8. h4
      Qe7 9. hxg5 $14 fxg5 $4 (9... d6 $142 $14 10. Nf3 (10. gxf6 Qxf6 11. Nf3 (11.
      Ne2 Rf8 12. f3 Nd7 13. c3 Ba5 14. d3 $11 {0.25/8}) 11... Bc5 12. Nc3 c6 13. Qh5
      Nd7 14. Rb1 $14 {0.31/9}) (10. Qh5 Nd7 (10... fxg5 11. Nf3 Be6 12. Bxe6 Qxe6
      13. Nxg5 Qc4 14. Bc3 $14 {0.56/8}) 11. a3 (11. Nf3 Kd8 12. a3 Bc5 13. g3 Nb6
      14. Be2 $11 {-0.06/8}) 11... Bc5 12. Nf3 Kd8 13. Qh6 c6 14. Nc3 $11 {0.09/7}) (
      10. Nh3 Nd7 (10... Nc6 11. gxf6 (11. Nc3 Bxc3 12. Bxc3 Be6 13. Bxe6 Qxe6 14.
      gxf6 $14 {0.41/9}) 11... Qxf6 12. Ng5 Rf8 13. f3 Qf4 14. Nxh7 $16 {0.81/9}) (
      10... f5 11. a3 (11. Nc3 c6 12. Bd3 Rf8 13. a3 Bc5 14. exf5 $11 {0.09/9}) (11.
      Bd3 f4 12. a3 Bc5 13. Nc3 c6 14. Qh5 $11 {0.06/9}) (11. Qh5 Rf8 12. a3 Ba5 13.
      Nc3 c6 14. Bd3 $11 {0.19/8}) 11... Ba5 12. Nc3 c6 13. Bd3 f4 14. Ne2 $11 {
      0.22/9}) (10... c6 11. gxf6 Qxf6 12. Ng5 Rf8 13. f3 Qf4 14. Nxh7 $18 {1.44/9})
      (10... Rf8 11. Nc3 c6 12. a3 Bc5 13. Na4 Nd7 14. Nxc5 $11 {-0.06/7}) 11. a3 Bc5
      12. gxf6 Nxf6 13. Nc3 Rf8 14. f3 $11 {-0.25/8}) (10. a3 Bc5 11. Nf3 Nd7 12. Nc3
      Nb6 13. Bb3 f5 14. a4 $14 {0.31/8}) 10... Nd7 (10... f5 11. a3 (11. Nh4 Nxh4
      12. Qxh4 Rf8 13. exf5 Bxf5 14. Bb5+ $14 {0.28/9}) 11... fxe4 12. Nh4 Nxh4 13.
      Rxh4 Bc5 14. Nc3 $14 {0.69/8}) 11. a3 (11. Nc3 Nb6 12. Nd5 Nxd5 13. exd5 a6 14.
      gxf6 $11 {0.16/8}) 11... Bc5 12. Nc3 Nb6 13. Bb3 f5 14. d3 $14 {0.34/7}) (9...
      Qc5 10. Qxg6+ (10. Bb3 Qc6 11. f3 fxg5 12. Qxg5 Be7 13. Qg3 Qf6 14. Nc3 $14 {
      0.50/9}) 10... hxg6 11. Rxh8+ Ke7 12. Bb3 Na6 13. c3 Qc6 14. Bd5 $16 {1.09/7})
      10. Qxg6+ $3 $18 hxg6 11. Rxh8+ (11. Rxh8+ Qf8 12. Bxe5 $18) 1-0
      
      [Event "Berlin"]
      [Site "?"]
      [Date "2006.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Baumeister, Wolfgang"]
      [Result "1-0"]
      [WhiteElo "1810"]
      [PlyCount "107"]
      [EventDate "2006.??.??"]
      
      1. b4 e6 2. Bb2 Qh4 3. a3 f5 4. Nf3 Qh6 5. c4 Nf6 6. d4 b6 (6... Be7 7. Bc1 Qg6
      8. g3 $11) 7. Nc3 Be7 (7... Bb7 8. Bc1 Qg6 9. Bf4 $14) 8. d5 (8. Nb5 Na6 $14)
      8... Ba6 (8... O-O 9. Nb5 Na6 10. d6 cxd6 11. Nxd6 Bxd6 12. Qxd6 $11) 9. e3 $16
      Bb7 10. dxe6 (10. Nb5 Na6 $16) 10... dxe6 $14 11. Nb5 Bd8 (11... Na6 12. Qa4
      O-O 13. Nbd4 $14) 12. Be5 Na6 13. Bf4 Qh5 14. Be2 (14. Nbd4 $5 O-O 15. c5 $16)
      14... O-O $14 15. Ne5 Qe8 16. O-O Be7 17. Qc2 (17. Qb3 Ne4 18. Rad1 g5 $16)
      17... Be4 (17... c5 18. Qb2 $14) 18. Qb3 (18. Qa4 Bb7 $16) 18... c5 $14 19. Nd3
      (19. f3 Bc6 $14) 19... Bxd3 (19... Qg6 20. Ne1 $11) 20. Bxd3 $14 cxb4 (20...
      Qc8 21. Be5 $11) 21. axb4 $16 Nxb4 22. Nc7 (22. Rxa7 $2 Rxa7 23. Nxa7 Qd7 (
      23... Nxd3 $6 24. Qxd3 Bc5 25. Nb5 $11) 24. Bxf5 exf5 (24... Qxa7 $6 25. Bxe6+
      Kh8 26. Be5 $17) 25. c5+ Nfd5 26. cxb6 Kh8 $19) 22... Qc6 23. Nxa8 Nxd3 (23...
      Rxa8 24. Be2 $16) 24. Qxd3 (24. Rxa7 $5 Nxf4 25. exf4 $16) 24... Rxa8 $14 25.
      Qb3 (25. Rfd1 a5 $14) 25... Ne4 26. Rfd1 Bf6 27. Rac1 (27. Ra3 e5 28. Bg3 Qe6
      $14 (28... Nxg3 $143 29. hxg3 Kf8 30. Ra6 $16)) 27... g5 $11 28. Bg3 h5 (28...
      a5 29. Qa3 $11) 29. f3 $14 Nc5 (29... Nxg3 30. hxg3 Be5 31. f4 $14) 30. Qb5 Qb7
      (30... Qxb5 31. cxb5 e5 32. Rd5 $16) 31. Bd6 $16 a6 (31... Qc8 32. Rd2 $16) 32.
      Qb4 Nd7 (32... Qc6 33. Rb1 $16) 33. c5 (33. Be7 Kf7 34. Bxf6 Nxf6 $18) 33...
      Qc6 $16 34. cxb6 (34. Qb3 Kf7 35. cxb6 Qxb6 $18) 34... Qxb6 {
      White gets strong play along the open c-file} 35. Qxb6 (35. Qe1 $5 h4 $16)
      35... Nxb6 36. Rc6 Nd5 37. Bc5 Kf7 38. Rb1 (38. e4 fxe4 39. fxe4 Nf4 $18) 38...
      Be7 39. Rb7 Kf6 40. Bd4+ Kf7 41. e4 fxe4 (41... Nf4 42. Bc5 Ng6 43. exf5 exf5
      44. Rxg6 Kxg6 45. Bxe7 $18) 42. fxe4 Nf4 43. Be3 e5 (43... a5 44. Rcc7 Re8 45.
      g3 $18) 44. Rcc7 (44. Bc5 Re8 $18) 44... Ng6 (44... Re8 45. Rc5 Kf6 46. Rb6+
      Ne6 47. Bxg5+ Kxg5 48. Rxe5+ Kf4 49. Rbxe6 Bc5+ 50. Kf1 Rxe6 51. Rxe6 a5 52.
      g3+ Ke3 $18) 45. Bxg5 Re8 46. Ra7 (46. Rc6 a5 $18) 46... Kf8 47. Bxe7+ Rxe7 48.
      Rxe7 Nxe7 49. Rxa6 Kg7 50. Kf2 h4 (50... Ng6 $18) 51. Kf3 Ng6 (51... h3 52.
      gxh3 Kf7 $18) 52. Rxg6+ Kxg6 53. Kg4 h3 54. Kxh3 (54. Kxh3 Kg5 55. Kg3 $18) 1-0
      
      [Event "9th Berlin Germany, Lichtenberger Somme"]
      [Site "?"]
      [Date "2010.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Hoeckendorf, Hartmut"]
      [Result "0-1"]
      [WhiteElo "1755"]
      [BlackElo "2185"]
      [PlyCount "86"]
      [EventDate "2010.??.??"]
      
      1. b4 f5 2. Bb2 Nf6 3. Nf3 e6 4. b5 b6 5. e3 Bb7 6. c4 Be7 (6... Bd6 7. Nc3 O-O
      8. Be2 a6 9. a4 Qe7 10. O-O Bb4 11. Na2 Ba3 12. Bxa3 Qxa3 13. Nd4 Qd6 14. Bf3
      axb5 15. Bxb7 {1-0 Bendig,F (2365)-Seiler,W (2340)/remoteschach.de 2008}) 7.
      Nc3 (7. d4 O-O 8. Bd3 a6 9. a4 axb5 10. axb5 Rxa1 11. Bxa1 c6 12. Nbd2 cxb5 13.
      cxb5 d6 14. O-O Nbd7 15. Qb3 Bd5 16. Bc4 Qa8 17. Bb2 Qb7 18. Bxd5 Nxd5 19. Rc1
      Kh8 20. Ba3 N7f6 21. Ng5 Qd7 {
      marvis (1680)-rocky124 (1855)/playok.com 2013/0-1 (47)}) 7... O-O 8. Be2 $146 (
      8. d4 Qe8 9. Be2 d6 10. O-O Qg6 11. d5 exd5 12. Nxd5 Nxd5 13. cxd5 Bf6 14. Qc2
      Bxd5 15. Bxf6 Qxf6 16. Qxc7 Rc8 17. Qxc8+ Kf7 18. Qc7+ Kg6 19. Rfd1 Be4 20.
      Rxd6 {1-0 elsh1403-golman9/kurnik 2011}) 8... Ne4 9. d3 Nxc3 10. Bxc3 Bf6 11.
      d4 d6 12. a4 (12. O-O c5 $11) 12... a5 (12... c5 13. O-O $11) 13. Qc2 (13. O-O
      Qe7 $11) 13... Nd7 14. O-O-O (14. O-O $5 $11) 14... c6 15. Kb1 (15. bxc6 Bxc6
      16. Kd2 Rc8 $15) 15... cxb5 $17 16. cxb5 Rc8 17. Qb2 (17. Rc1 Bd5 $17) 17...
      Be4+ 18. Ka1 Qe7 (18... Rc7 19. Rc1 $17) 19. Rc1 e5 (19... Rc7 20. Qa3 $17) 20.
      Rhd1 $15 exd4 21. exd4 (21. Bxd4 Nc5 22. Bxf6 Rxf6 $15) 21... Bd5 (21... d5 22.
      Re1 $17) 22. Ne1 (22. Re1 Qf7 $15) 22... Bg5 (22... Qf7 23. Bd3 $17) 23. Bd2
      Bf6 24. Bc3 Qf7 25. Rd3 (25. Bd3 Rfe8 $17) 25... g6 (25... Bc4 26. Rg3 $17) 26.
      f4 (26. Nf3 Rfe8 $17) 26... Rfe8 27. Bf3 Bc4 28. Rd2 Re3 (28... Bb3 $142 29.
      Bc6 Bd5 30. Bxd5 Qxd5 $17) 29. Bd1 $4 (29. Nc2 Re7 30. Qa3 Bd5 $17) 29... Bd5 (
      29... Rxe1 $142 30. g3 Re3 $19) 30. Rd3 (30. Nf3 Bxf3 31. gxf3 d5 $17) 30...
      Rxd3 (30... Qe6 31. Rxe3 Qxe3 32. Nf3 $17) 31. Nxd3 $17 Nf8 32. Qd2 (32. Qa3
      Qe6 $17 (32... Bxg2 33. Qxd6 Bd5 34. Qxb6 $15)) 32... Ne6 33. Bb2 Rxc1+ (33...
      Rc7 34. Qf2 $17) 34. Qxc1 (34. Nxc1 $5 Qc7 35. h4 $17) 34... Nxd4 35. Qe3 Qg7 (
      35... Qe6 $5 36. Qxe6+ Bxe6 37. h3 $19) 36. Qe8+ $17 Qf8 37. Qe3 Bb3 (37... Ne6
      38. Qxb6 Bxb2+ 39. Kxb2 Qf6+ 40. Kc2 $15) 38. Bxd4 (38. Qxd4 $142 $5 Bxd1 39.
      Qxf6 Qxf6 40. Bxf6 Bxa4 41. Bd4 Bxb5 42. Nb2 $14) 38... Bxd1 $15 39. Nb2 Bc2 (
      39... Bxd4 40. Qxd4 Bb3 41. Qxb6 $17) 40. Qe6+ (40. Bxf6 $5 Qxf6 41. Qxb6 $11)
      40... Kg7 $15 41. Bxb6 $4 (41. Bxf6+ $142 Qxf6 42. Qc4 $17) 41... d5 $19 42.
      Ka2 Qb4 43. Qd7+ Kh6 (43... Kh6 44. Qxh7+ Kxh7 45. Bd4 Qb3+ 46. Ka1 Qa3#) 0-1
      
      [Event "6th Berlin-ch Seniors"]
      [Site "?"]
      [Date "2010.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Weigelt, Reinhard"]
      [Result "1-0"]
      [WhiteElo "1725"]
      [BlackElo "1850"]
      [PlyCount "101"]
      [EventDate "2010.??.??"]
      
      1. b4 Nf6 2. Bb2 Nd5 3. a3 Nb6 4. e3 (4. c3 d5 5. d3 Bf5 6. Nf3 e6 7. Nd4 Bg6
      8. g3 e5 9. Nf3 e4 10. Nd4 exd3 11. e3 Be4 12. f3 Bg6 13. Bxd3 Nc4 14. Ra2 Nxb2
      15. Rxb2 Bd6 16. Bxg6 hxg6 17. O-O Qg5 18. Qe2 Bxg3 {
      paschalina-groslolo/kurnik 2014/1-0 (52)}) 4... d6 5. c4 e5 (5... d5 6. c5 N6d7
      7. Nf3 e5 8. Nxe5 Nxe5 9. Bxe5 f6 10. Bb2 Nc6 11. g3 d4 12. exd4 Nxd4 13. Bxd4
      Qxd4 14. Nc3 Bg4 15. Be2 Bxe2 16. Qxe2+ Be7 17. O-O O-O 18. Qxe7 Rfe8 19. Qxc7
      Qxd2 20. Nb5 {Fournier,F (2090)-NN/jeu.europe-echecs.com 2013/1-0}) 6. Qc2 $146
      (6. h3 Bf5 7. Nc3 Nc6 8. e4 Bg6 9. h4 h6 10. h5 Bh7 11. g4 Be7 12. Bg2 O-O 13.
      Nge2 Bg5 14. O-O Nxc4 15. Bc1 a5 16. b5 Nd4 17. d3 Bxc1 18. Qxc1 Nxe2+ 19. Nxe2
      Nb6 20. a4 Rc8 {cogit-johnboy/kurnik 2012/1-0 (67)}) 6... N8d7 (6... Nc6 7. Nf3
      $11) 7. d4 exd4 8. exd4 (8. Bxd4 f6 $11) 8... Nf6 (8... Qe7+ 9. Kd1 $11) 9. Bd3
      Bg4 (9... c6 10. Nd2 $14) 10. Ne2 Bxe2 (10... Be7 11. d5 $14) 11. Bxe2 Be7 (
      11... c6 12. O-O $14) 12. Nd2 (12. d5 O-O $16) 12... O-O 13. O-O d5 14. c5 Nc8
      (14... Nbd7 15. Qf5 $14) 15. a4 (15. Rfe1 c6 $16) 15... c6 (15... Re8 16. Rae1
      $16) 16. Nf3 Ne4 (16... Re8 17. Ne5 $16) 17. Bd3 f5 18. Ne5 g6 19. f3 Ng5 20.
      b5 Qc7 21. Rfe1 Bf6 22. Qf2 (22. Re2 Ne6 $16) 22... Ne7 23. Bc1 Ne6 24. f4 Ng7
      (24... Rfe8 25. Bb2 $16) 25. Bd2 Ne8 (25... Ne6 26. Bc3 $16) 26. Qe2 (26. Re3
      Bg7 $16) 26... Ng7 27. Qf2 Nh5 (27... Ne8 28. Re2 Bg7 $16) 28. h3 (28. Re2 Ng7
      $16) 28... Bg7 29. Reb1 (29. a5 Nf6 $16) 29... Nf6 $14 30. b6 (30. Qe3 Ne4 $14)
      30... axb6 31. Rxb6 Nc8 32. Rb3 Ne4 33. Qe1 (33. Qe3 Ra7 $14) 33... Bxe5 (33...
      Ra7 $5 $14) 34. fxe5 $16 (34. dxe5 $143 Nxc5 35. Rba3 Re8 $15) 34... Nxd2 35.
      Qxd2 Rf7 36. a5 Kg7 37. h4 Qd8 38. Qe1 Rc7 39. Bc2 Re7 40. h5 $1 Kf7 $2 (40...
      gxh5 41. Rg3+ {Double attack} (41. Bxf5 {Deflection})) 41. Qh4 $18 Qg8 (41...
      Qf8 42. hxg6+ hxg6 43. Qf6+ Ke8 44. Qxg6+ Kd8 45. Bxf5 $18) 42. Qf6+ Ke8 43.
      Rxb7 $3 Re6 (43... Rxb7 44. Qxc6+ {Double attack} (44. Qxc6+ {Deflection}) (44.
      Qxc6+ {Decoy})) 44. Qg5 (44. Rg7 Rxf6 45. Rxg8+ Rf8 46. Rxf8+ Kxf8 $18) 44...
      Ne7 (44... Re7 45. Ba4 Re6 $18) 45. a6 Kf7 (45... h6 46. Qf4 g5 47. Qf2 $18)
      46. Rab1 (46. Rxe7+ Kf8 47. Rb7 h6 48. Qxh6+ Ke8 $18) 46... h6 (46... Re8 $18)
      47. hxg6+ Qxg6 48. Qxg6+ (48. Qxf5+ $142 $1 Qxf5 49. Bxf5 Rxa6 $18) 48... Rxg6
      (48... Kxg6 49. a7 Kg5 $18) 49. Bxf5 Rg5 (49... Rgg8 50. a7 Rgf8 51. Bg4 $18)
      50. Rf1 Kf8 (50... Rxf5 51. Rxf5+ Ke8 $18) 51. Be6+ (51. Be6+ Kg7 52. Rxe7+ Kg6
      53. Rf6+ Kh5 54. Rh7 $18) 1-0
      
      [Event "Lichtenberger Sommer"]
      [Site "?"]
      [Date "2015.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Wahner, Eberhard"]
      [Result "1-0"]
      [WhiteElo "1860"]
      [PlyCount "73"]
      [EventDate "2015.??.??"]
      
      1. b4 Nf6 2. Bb2 g6 3. e3 Bg7 4. c4 d6 5. Nf3 O-O 6. Nc3 e5 7. d4 exd4 8. Nxd4
      b6 9. Be2 Bb7 10. Bf3 Bxf3 11. Qxf3 Nbd7 12. Nc6 Qe8 13. Nb5 $146 (13. O-O Ne5
      14. Nxe5 dxe5 15. Rad1 Rd8 16. Qb7 Rxd1 17. Rxd1 Qb8 18. Qc6 a6 19. Nd5 Nxd5
      20. Rxd5 Rd8 21. e4 Rxd5 22. exd5 e4 23. Bxg7 Kxg7 24. g3 a5 25. a3 axb4 26.
      axb4 Qa7 27. d6 cxd6 {lllllll21-bojnice (1835)/kurnik 2013/1-0 (45)}) 13... Rc8
      $2 (13... Ne5 $5 14. Bxe5 dxe5 15. Nxc7 e4 16. Nxe8 exf3 17. Ne7+ Kh8 18. Nxg7
      fxg2 $16) 14. Nbxa7 Ne5 $4 (14... Ra8 $142 15. Nb5 Ne5 16. Bxe5 dxe5 17. Nxc7
      e4 18. Nxe8 exf3 19. Nxg7 fxg2 $16) 15. Bxe5 dxe5 16. Nxc8 e4 (16... Qe6 17.
      N8e7+ Kh8 18. O-O $18) 17. N8e7+ (17. Qd1 $142 $18) 17... Kh8 18. Qe2 (18. Qg3
      $142 Ng8 19. Qxc7 Bxa1 20. Nd5 $18) 18... Nd5 $4 (18... Ng8 19. Nd4 Qxe7 $18)
      19. Nxd5 Bxa1 20. O-O Bg7 (20... Qxc6 21. Rxa1 Kg7 22. a4 $18) 21. b5 f5 (21...
      Be5 22. c5 $1 bxc5 23. Qc4 $18) 22. Rd1 (22. Nxc7 Qd7 23. Nd5 Qb7 $18) 22...
      Qf7 23. Qd2 (23. a4 Ra8 24. Qc2 Bf8 $18) 23... g5 24. g3 h5 25. Qb4 h4 26. Qd2
      Qh5 (26... Kh7 27. Qe2 Kh6 28. c5 $18) 27. Re1 (27. Nxc7 $142 Rf6 $18) 27... f4
      (27... h3 28. Qe2 Qf7 $18) 28. exf4 gxf4 29. Nxf4 Qg4 (29... Qg5 30. Rxe4 Bf6
      31. Qd7 $18) 30. Qe3 (30. Rxe4 Bf6 31. Ne6 Qg6 $18) 30... Bh6 (30... Re8 31.
      Nd5 hxg3 32. hxg3 $18) 31. Kh1 (31. Ne5 Bxf4 32. Qxe4 Qf5 33. Ng6+ Kg7 34. Nxf8
      Qxe4 35. Rxe4 Bd6 36. Ne6+ Kf6 37. gxh4 Kf5 $18) 31... h3 (31... Bxf4 32. Qxe4
      Qg5 $18) 32. Qd4+ Kg8 (32... Kh7 33. Qxe4+ Qf5 34. Qe2 $18) 33. Qxe4 (33. Ne7+
      $142 Kf7 34. Qxe4 $18) 33... Bxf4 34. gxf4 (34. Ne7+ $142 Kg7 35. Rg1 $18)
      34... Rxf4 (34... Qg2+ 35. Qxg2+ hxg2+ 36. Kxg2 Rxf4 37. Re8+ Kg7 $18) 35. Qd5+
      Kh7 36. Rg1 (36. Re7+ $142 Kh6 37. Re6+ Kg7 38. Qe5+ Kg8 39. Rg6+ Qxg6 40. Ne7+
      Kh7 41. Nxg6 Rxf2 42. Qxc7+ Kh6 43. Qxb6 Rf1+ 44. Qg1 $18) 36... Rxf2 (36...
      Qf3+ 37. Qxf3 Rxf3 $18) 37. Rxg4 (37. Rxg4 Rf1+ 38. Rg1 Rxg1+ 39. Kxg1 Kg6 40.
      Qe6+ Kg5 41. Ne7 Kf4 42. Kf2 Kg5 43. Kg3 c6 44. Qg6#) 1-0
      
      [Event "Berliner Sommer"]
      [Site "?"]
      [Date "1995.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Otte, Marco"]
      [Result "1/2-1/2"]
      [WhiteElo "1845"]
      [BlackElo "2065"]
      [PlyCount "151"]
      [EventDate "1995.??.??"]
      
      1. b4 d5 2. Bb2 Nf6 3. e3 g6 4. Nf3 Bg7 5. c4 c6 6. Qb3 O-O (6... Bg4 7. Ne5
      Bf5 8. Be2 $11) 7. cxd5 (7. Bxf6 Bxf6 8. d4 a5 $11) 7... cxd5 8. Be2 Na6 (8...
      a5 9. O-O $11) 9. O-O b6 (9... Bg4 10. Bxa6 Bxf3 11. Bxb7 $11) 10. Nc3 (10. Be5
      Nb8 $14) 10... Nc7 11. Rfc1 (11. Rac1 Bg4 $14) 11... Bb7 (11... Bg4 12. Rc2 $14
      ) 12. a4 (12. Rc2 Bc8 $14) 12... Nfe8 (12... Qd6 13. Na2 Rac8 14. Be5 $16) 13.
      Nb5 (13. d4 Nf6 $16) 13... Ne6 (13... Bxb2 14. Qxb2 Nxb5 15. axb5 $14) 14. Bxg7
      $16 N8xg7 15. Ne5 (15. d4 $5 $16) 15... a6 $14 16. Nd4 (16. Na3 d4 $14) 16...
      Nxd4 $11 17. exd4 Qd6 18. a5 Ne6 19. Qb2 (19. Qe3 Rac8 $11) 19... Rfb8 (19...
      Nf4 20. Bf1 $11) 20. Nd3 (20. Bg4 bxa5 21. Bxe6 Qxe6 22. Rxa5 Rc8 $14) 20...
      Bc6 21. axb6 {The passed pawn on b6 will quickly become a dangerous weapon} (
      21. Bf3 Bb5 22. Ne5 f6 $15) 21... Bb5 (21... Rxb6 22. Bg4 Nf4 23. Nxf4 Qxf4 $15
      ) 22. Bf1 (22. b7 Ra7 23. Rc8+ Kg7 24. Rxb8 Qxb8 25. Qc3 Rxb7 26. Bg4 Bxd3 27.
      Qxd3 $17) 22... Bxd3 (22... Rxb6 23. Nc5 $17) 23. Bxd3 Rxb6 24. Ra4 Rab8 {
      The pressure on the isolated pawn grows} (24... Qf4 $17) 25. Qa1 {
      Increasing the pressure on the isolated pawn on a6} (25. Rb1 $5 $15) 25... Qf4
      (25... Rxb4 26. Rxa6 Qf4 27. Ra8 $17) 26. Bxa6 Rxb4 27. Rc8+ (27. Rxb4 Rxb4 28.
      Rc8+ Kg7 $19) 27... Kg7 (27... Rxc8 28. Rxb4 Rc2 29. Rb2 Qxd4 30. Rb8+ Kg7 31.
      Qf1 $19) 28. Rxb8 (28. Rxb4 Rxb4 29. Qe1 Rb2 $19) 28... Rxb8 29. Qc3 (29. d3
      Qd2 30. Ra2 Qc3 $19) 29... Rb1+ 30. Bf1 Rd1 (30... Qe4 $5 31. Ra1 Rxa1 32. Qxa1
      Nxd4 33. f3 $19) 31. Qe3 $17 Rxd2 32. g3 Qh6 (32... Qxe3 $142 33. fxe3 Ng5 $17)
      33. Qe5+ $14 Kg8 34. Ra8+ Nf8 35. Qxd5 Qg7 36. Qe5 (36. Qd8 Rxd4 37. Qxe7 Rd1
      $14) 36... Qxe5 (36... e6 37. Qc5 $11) 37. dxe5 $14 Rd5 (37... g5 38. h3 $14)
      38. f4 Rd2 (38... Kg7 39. Ra7 Rd7 40. Rxd7 Nxd7 41. Kf2 $14) 39. Re8 (39. Ra7
      Rd7 40. Rxd7 Nxd7 $14) 39... e6 40. Ra8 Kg7 41. Bb5 (41. Bg2 g5 $11) 41... g5
      42. Ra4 gxf4 43. gxf4 (43. Rxf4 $143 Ng6 44. Rg4 Kh6 $17) 43... Ng6 44. Bc6 h5
      45. Bf3 Kh6 (45... h4 46. Bg2 $11) 46. h3 (46. Rc4 Nh4 47. Be4 Kg7 $11) 46...
      Rd3 $15 47. Bg2 Nh4 48. Bf1 Rd2 (48... Rf3 49. Bg2 Rg3 50. Ra2 Nxg2 51. Rxg2
      $17) 49. Ra3 (49. Bb5 $142 $5 $11) 49... Rd4 $17 50. Re3 (50. Ra8 $142 $5 $17)
      50... Rxf4 $19 51. Bg2 (51. Bd3 Rf3 52. Re4 Rxh3 $19) 51... Nxg2 (51... Ng6 $5
      52. Re2 $19) 52. Kxg2 Kg5 53. Rg3+ (53. Kh1 Rf5 54. Re1 Kf4 $19) 53... Kf5 54.
      Re3 (54. Rb3 Kxe5 55. Rb5+ Kd4 56. Rxh5 e5 $19) 54... h4 55. Re2 (55. Kg1 Re4
      56. Rf3+ Kg6 57. Rf6+ Kg7 $19) 55... Kg6 (55... Re4 $5 56. Rf2+ Kg6 57. Rf6+
      Kg7 58. Kg1 $19) 56. Re3 Kg7 (56... f6 57. exf6 Kxf6 58. Ra3 $19) 57. Re2 Kf8 (
      57... f6 58. Re3 $19) 58. Re3 $17 Ke7 59. Re2 (59. Ra3 Kd7 $17) 59... Kd7 (
      59... f6 60. exf6+ Kxf6 61. Ra2 $19) 60. Rd2+ (60. Rc2 Rf5 61. Rc4 Rxe5 62.
      Rxh4 Rf5 $17) 60... Kc6 61. Rd8 Kc5 62. Rh8 Kd4 63. Rh5 Ke4 64. Kg1 (64. Kh2
      $142 $19) 64... Kf3 65. Kh2 Ra4 66. Rh7 (66. Rg5 Ra2+ 67. Kg1 $19) 66... Rf4 $4
      (66... Ra2+ 67. Kg1 Kg3 68. Kf1 Rf2+ 69. Ke1 $19) 67. Rh5 Rf5 (67... Rd4 68.
      Rg5 Rd2+ 69. Kg1 $19) 68. Rxh4 (68. Rh7 Ke3 $19) 68... Rxe5 69. Rb4 Re2+ (69...
      f5 70. Rb3+ Re3 71. Rb1 $19) 70. Kh1 (70. Kg1 Re1+ 71. Kh2 f5 $19) 70... Kg3 (
      70... f5 $142 $5 71. Kg1 $19) 71. Rb3+ Kh4 72. Kg1 e5 (72... f5 $5 73. Kf1 Ra2
      74. Rf3 $19) 73. Rf3 $17 e4 (73... Rd2 74. Rxf7 Kxh3 75. Rg7 $17) 74. Rxf7 Kxh3
      (74... Rd2 75. Kf1 Kg3 76. h4 $17) 75. Rg7 (75. Kf1 $5 Rc2 76. Rf4 $15) 75...
      Rb2 (75... Rc2 76. Kf1 Kh4 77. Re7 $17) 76. Kf1 1/2-1/2
      
      [Event "7th Berlin-ch Seniors"]
      [Site "?"]
      [Date "2011.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Hartmann, Hans"]
      [Result "1/2-1/2"]
      [WhiteElo "1770"]
      [PlyCount "86"]
      [EventDate "2011.??.??"]
      
      1. b4 Nf6 2. Bb2 g6 3. Nf3 d5 4. e3 Bg7 5. c4 c6 6. cxd5 cxd5 7. Be2 O-O 8. O-O
      (8. d3 Nc6 9. a3 b5 10. Nbd2 Bg4 11. Rc1 Qd6 12. O-O Rfc8 13. Nb3 a6 14. Qd2 h5
      15. h3 Bxf3 16. Bxf3 e5 17. Rc5 Ne7 18. Rxc8+ Rxc8 19. Rc1 Rxc1+ 20. Qxc1 Nd7
      21. Qc2 Kf8 22. Be2 {
      1/2-1/2 Cruz,C (2495)-Gonzalez de la Torre,S (2435)/Elgoibar ESP 2012}) 8... a6
      (8... Re8 9. Nc3 Nc6 10. b5 Na5 11. Rc1 Bf5 12. d3 a6 13. h3 Qd6 14. Ba1 Rec8
      15. Qd2 Bd7 16. Rb1 e6 17. bxa6 Rxa6 18. Rfc1 Rb6 19. Bd1 Rxb1 20. Rxb1 Ne8 21.
      Ne2 Bxa1 22. Qxa5 Bf6 23. Rxb7 {
      forsetinn (2435)-marekt (2180)/gameknot.com 2015/1/2-1/2 (73)}) 9. a4 Nc6 $146
      (9... Bd7 10. Nc3 e6 11. d4 Nc6 12. b5 axb5 13. Nxb5 Na5 14. Ne5 Bc6 15. Qc2
      Nd7 16. Nxd7 Qxd7 17. Rfc1 Rfc8 18. Qd1 h6 19. Bc3 Nc4 20. Bxc4 dxc4 21. Rcb1
      Be4 22. Rb2 Bd3 23. Qf3 Rc6 24. h3 {
      emeryt85-torsen1 (1625)/kurnik 2014/1-0 (35)}) (9... Bg4 10. b5 $11) 10. b5
      axb5 (10... Na5 11. Na3 $11) 11. axb5 Rxa1 12. Bxa1 Nb8 13. Qb3 b6 14. Rc1 Bb7
      (14... Nbd7 15. Ne5 Nc5 16. Qb4 $14) 15. Bd4 (15. Be5 Nbd7 $14) 15... Nfd7 (
      15... Nbd7 16. Qa3 $14) 16. Bxg7 $16 Kxg7 17. Qc3+ (17. Qa2 e6 $16) 17... Kg8 (
      17... Nf6 18. Qc7 Qc8 19. d4 $16) 18. d4 Nf6 19. Qb4 Nbd7 20. Nbd2 (20. Nc3 Ne4
      $16) 20... Re8 21. Ne5 (21. Bd3 Qb8 $16) 21... Nxe5 $14 22. dxe5 Nd7 23. f4 (
      23. Qd4 Qb8 $14) 23... Nc5 24. Nf3 (24. Nb3 Nxb3 25. Qxb3 Qd7 $14) 24... Qa8
      25. Qb2 Qa4 26. Nd4 (26. Bd1 Qe4 27. Rc3 Nd3 $14) 26... Ra8 $11 27. h4 e6 28.
      g4 Kg7 29. h5 Qa3 30. Qxa3 Rxa3 31. Kf2 Ne4+ 32. Kf3 Nc5 33. hxg6 hxg6 34. f5 (
      34. g5 Kf8 $14) 34... g5 (34... Kg8 $142 $5 $11) 35. fxe6 $16 fxe6 36. Rh1 (36.
      Rxc5 $5 bxc5 37. Nxe6+ Kg6 38. Nxc5 $16) 36... Ra8 (36... Bc8 37. Rh5 Ne4 38.
      Bd1 $11) 37. Kg2 (37. Rh5 Kg6 $14) 37... Rh8 38. Rxh8 Kxh8 39. Bd1 (39. Nf3 Kg7
      $14) 39... Kg7 $11 40. Bc2 Kf7 41. Kf2 Nd7 (41... Kg7 $5 $11) 42. Nf3 $14 Ke7 (
      42... Kg8 43. Kg3 Bc8 44. e4 $14) 43. Kg3 (43. Ke2 $142 $5 $16) 43... Ba8
      1/2-1/2
      
      [Event "Berlin Chemie op"]
      [Site "?"]
      [Date "2001.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Thielsch, Norman"]
      [Result "0-1"]
      [WhiteElo "2040"]
      [BlackElo "2320"]
      [PlyCount "76"]
      [EventDate "2001.??.??"]
      
      1. b4 {D94: Gr nfeld: 4 Nf3 Bg7 5 e3} Nf6 2. Bb2 g6 3. e3 Bg7 4. c4 O-O 5. Nf3
      c6 6. d4 d5 7. Nc3 Bg4 8. cxd5 $146 (8. Qb3 Bxf3 9. gxf3 dxc4 (9... e6 10. f4
      Nbd7 11. Be2 dxc4 12. Qxc4 Nd5 13. Qb3 Nxc3 14. Bxc3 Qh4 15. Bf3 Nf6 16. Ke2
      Nd5 17. Bd2 Rfd8 18. Rac1 a6 19. Rhg1 Rd7 20. Rg4 Qd8 21. Rg3 Ne7 22. Be4 Nf5
      23. Bxf5 exf5 24. Kf1 {
      Spraggett,K (2520)-Zugic,I (2405) ch-CAN, Brantford CAN 1999 0-1 (53)}) 10.
      Bxc4 Nbd7 11. Be2 e5 12. dxe5 Nxe5 13. Rd1 Qc7 14. b5 Rad8 15. O-O Qc8 16. Na4
      Qf5 17. Bxe5 Qxe5 18. bxc6 bxc6 19. Qc4 Nd5 20. f4 Qe6 21. Bf3 Qh3 22. Bg2 Qg4
      {Stryjecki,M (2415)-Vlassow,V (2325) Cracovia A Krakow 2005 1/2 (34)}) (8. Be2
      Nbd7 9. O-O dxc4 10. Bxc4 e5 11. dxe5 Bxf3 12. gxf3 Nxe5 13. Be2 Qc8 14. f4 Rd8
      15. Qc2 Qh3 16. fxe5 Ng4 17. Bxg4 Qxg4+ 18. Kh1 Qf3+ 19. Kg1 Qg4+ 20. Kh1 Qf3+
      {1/2 (20) Karjakin,S (2730)-Van Wely,L (2675) Aerosvit Foros UKR 2008}) (8. Bd3
      Nbd7 9. Ne2 a5 10. b5 c5 11. Ne5 Nxe5 12. dxe5 Nd7 13. f3 dxc4 14. Bxc4 Bxe5
      15. Rb1 Bxb2 16. Rxb2 Ne5 17. Rd2 Qb6 18. Bd5 Be6 19. Nf4 c4 20. Ke2 c3 21. Rd4
      Qxb5+ 22. Kf2 Bxd5 {Bugajski, R-Jasnikowski,Z Poland 1982 0-1 (40)}) 8... Nxd5
      9. Nxd5 Qxd5 10. Be2 a5 11. Bc3 axb4 12. Bxb4 Rxa2 13. Rxa2 Qxa2 14. Bxe7 Re8 {
      Black threatens to win material: Re8xe7} 15. Bd6 Qd5 16. Bxb8 Rxb8 {
      Black has the pair of bishops} 17. O-O {White castles and improves king safety}
      b5 {Black has a new backward pawn: c6} 18. h3 {
      White threatens to win material: h3xg4} Be6 19. Nd2 c5 20. Bf3 (20. dxc5 $5 {
      has some apparent merit} Qxc5 21. Qb1 $15) 20... Qa2 $17 {
      Black prepares c4[%cal Yc5c4]} 21. Ne4 Bb3 {
      Black threatens to win material: Bb3xd1} (21... cxd4 22. exd4 Bc4 23. Re1 $17)
      22. Qd2 (22. Qc1 cxd4 23. Qc7 Rf8 24. exd4 Qb2 $15) 22... c4 (22... cxd4 $142
      23. exd4 Qxd2 24. Nxd2 Ba2 $17) 23. Qxa2 $11 Bxa2 24. Ra1 Bb3 25. Nc5 {
      An ideal square for the white knight.} Bc2 26. Rc1 Bf5 27. g4 {
      White threatens to win material: g4xf5} Bc8 28. Bd5 Bf8 29. e4 Bxc5 30. dxc5
      Be6 31. f4 Rd8 32. Bb7 (32. Bc6 $142 $5 {should be investigated more closely}
      Rc8 33. Bxb5 Rxc5 34. Ba4 $11) 32... b4 $17 33. f5 $2 (33. Bd5 $142 c3 34. Bxe6
      fxe6 35. Kf2 $17) 33... b3 $19 34. fxe6 (34. c6 b2 35. Rf1 $19) 34... b2 35.
      Rf1 c3 (35... fxe6 36. Bc6 c3 $19) 36. Bd5 $4 (36. e7 $142 {was possible} Re8
      37. Bc6 Rxe7 38. Ba4 $11) 36... c2 $19 37. e7 Rb8 38. Bxf7+ Kg7 (38... Kg7 39.
      e8=Q Rxe8 40. Bxe8 c1=Q $19) 0-1
      
      [Event "2rd Berlin Germany, Lichtenberger Somme"]
      [Site "?"]
      [Date "2013.??.??"]
      [Round "?"]
      [White "Koerner, Helmut"]
      [Black "Becker, Ja"]
      [Result "0-1"]
      [WhiteElo "1910"]
      [BlackElo "2035"]
      [PlyCount "110"]
      [EventDate "2013.??.??"]
      
      1. b4 Nf6 2. Bb2 g6 3. e3 Bg7 4. Nf3 O-O 5. c4 d6 6. d4 Nbd7 7. Nc3 c6 (7... a5
      8. a3 e5 9. b5 exd4 10. Nxd4 Nc5 11. Be2 Be6 12. Nxe6 fxe6 13. Bf3 Nfd7 14. Qc2
      Ne5 15. Be2 Qh4 16. g3 Qh3 17. Bf1 Nf3+ 18. Kd1 Qg4 19. Qe2 Ne4 20. Kc2 Nxc3
      21. Bxc3 Bxc3 22. Kxc3 {
      eddieteijeiro (2325)-waldokitty (2160)/net-chess.com 2010/0-1 (42)}) 8. Be2 (8.
      Qc2 a5 9. a3 Qc7 10. Bd3 e5 11. O-O Re8 12. c5 d5 13. dxe5 Nxe5 14. Nxe5 Qxe5
      15. Nb5 Qb8 16. Nd6 Rd8 17. Be5 Nd7 18. Bg3 Be5 19. f4 Bg7 20. Rae1 f5 21. Bh4
      Rf8 22. Be7 Nf6 {neriet (1635)-pavka66/kurnik 2013/1-0 (67)}) 8... Re8 $146 (
      8... Kh8 9. O-O Ng8 10. Qb3 e6 11. Rac1 d5 12. cxd5 cxd5 13. Rc2 Ngf6 14. Rfc1
      Ne8 15. Nb5 a6 16. Nc7 Rb8 17. b5 Bf6 18. Ba3 Be7 19. Bxe7 Qxe7 20. Nxd5 Qd8
      21. Nc7 Nxc7 22. Rxc7 Nf6 23. bxa6 {
      Hillebrand,C-Krumsdorf,J/Troisdorf op 2000/1-0 (42)}) (8... Qc7 9. O-O e5 10.
      dxe5 dxe5 11. e4 Rd8 12. Qc2 Nf8 13. Rfd1 Bg4 14. h3 Bxf3 15. Bxf3 Ne6 16. Ne2
      h5 17. g3 Nd7 18. c5 b6 19. cxb6 axb6 20. a4 c5 21. Qc4 Nd4 22. Nxd4 exd4 23.
      Bxd4 {
      Dickson,I (1910)-Oliver,G (2145)/Australian Open, Tuggeranong AUS 2007/0-1}) 9.
      O-O e5 10. dxe5 dxe5 (10... Nxe5 11. Nxe5 dxe5 12. e4 $11) 11. e4 $14 Qe7 12.
      Qb3 {White prepares b5} Nh5 13. Rfe1 Nf4 14. Bf1 (14. Rad1 Qe6 15. Rd2 a5 $11)
      14... Nf8 (14... a5 15. a3 $11) 15. Ne2 $14 Nh5 16. b5 (16. Rad1 Bg4 $14) 16...
      Bg4 (16... cxb5 17. cxb5 Be6 18. Qe3 $14) 17. a4 (17. h3 Bxf3 18. Qxf3 Red8 $14
      ) 17... Qf6 $11 18. Red1 Nf4 (18... Bxf3 $142 19. Qxf3 Qxf3 20. gxf3 Rad8 $11)
      19. Rd2 (19. Nxf4 $142 $5 Qxf4 20. Bc1 $16) 19... Nh3+ $15 20. gxh3 Bxf3 (20...
      Qxf3 $2 21. Rd3 Qxe4 22. Ng3 $18) 21. Ng3 Ne6 22. Ra3 (22. Qe3 Qf4 23. Rd3 $15)
      22... Bh5 (22... Qg5 23. Bc1 Bxe4 $17) 23. Nxh5 $4 (23. Qe3 $142 $11) 23...
      Qg5+ $19 24. Qg3 Qxd2 (24... Qxh5 $6 25. Qg4 $11) 25. Nxg7 Nxg7 (25... Qxb2 $6
      26. Nxe8 Rxe8 27. bxc6 bxc6 28. Rb3 $17) (25... Kxg7 $6 26. Qxe5+ (26. Bxe5+
      $143 Kg8 $17) 26... Kh6 27. Rg3 $11) 26. Bxe5 Nh5 27. Qc3 Qxc3 (27... Qg5+ 28.
      Bg3 Rxe4 29. Bg2 $19) 28. Bxc3 (28. Rxc3 $4 Rxe5 29. f3 f5 $19) 28... Rxe4 29.
      bxc6 (29. Bd2 Nf6 $19) 29... bxc6 30. Rb3 Nf4 (30... Rae8 31. Rb7 R4e7 32. Rxe7
      Rxe7 33. Kg2 $19) 31. Ba5 (31. Bd2 Rd8 32. f3 Ne2+ 33. Kf2 Re5 $19 (33... Rxd2
      $6 34. Rb8+ Kg7 35. fxe4 Nc3+ 36. Ke3 $17)) 31... Ne2+ 32. Kg2 Nd4 (32... Rae8
      33. Bd2 $19) 33. Rb7 c5 (33... Ne6 34. Bd2 $19) 34. Bd2 (34. Rd7 Re6 $19) 34...
      Kf8 (34... a6 35. Bd3 Ree8 36. a5 $19) 35. Be3 (35. Rc7 Ne6 36. Rb7 Ke8 $19)
      35... Re7 36. Rb2 Kg7 37. Kg1 Rd8 38. Rb1 (38. Bg2 Red7 $19) 38... Rd6 39. Bg2
      Rb6 40. Rd1 Rb4 41. Bd5 Rxa4 42. Kg2 (42. Bxd4+ cxd4 43. Rxd4 a5 $19) 42... Ne6
      (42... Nb3 43. Rb1 Ra3 44. Re1 $19) 43. Rb1 (43. Bxe6 fxe6 44. Bxc5 Rc7 45.
      Bd4+ Kf8 $19) 43... Rc7 (43... a6 44. h4 $19) 44. Bd2 Kf6 45. Rb8 (45. h4 h5
      $19) 45... Kf5 46. Kg3 (46. Rb3 a5 $19) 46... Ra3+ 47. f3 Ke5 48. Bc1 Ra2 49.
      Be3 (49. h4 Rd7 $19) 49... Re2 50. Bc1 Kd4 (50... Re7 51. Ba3 Nf4 52. Bb2+ Kf5
      53. Be4+ R7xe4 54. fxe4+ Kxe4 55. Re8+ Kd3 56. Be5 Nh5+ 57. Kf3 Re3+ 58. Kf2
      $19) 51. Bb2+ (51. Rb3 a5 $19) 51... Kd3 52. Be4+ (52. Rb3+ Kc2 53. Rb8 f5 $19)
      52... Kxc4 53. Be5 f5 54. Bxc7 fxe4 55. Bd6 (55. Rb7 Re3 56. Rxa7 Rxf3+ 57. Kg2
      Rf7 $19) 55... Rd2 0-1
      
      
      
      
      
      
      
      
      
      
      

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    Play 1.b4 at Chessworld.net!

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      Available lines:
    • 1.b4 (4 players, 1 day/move)
    • 1.b4 e5 2.Bb2 Bb4 3.Be5 Nf6 (4 players, 3 days/move)
    • 1.b4 e5 2.Bb2 Bb4 3.f4 ef4 4.Bg7 Qh4 5.g3 fg3 6.Bg2 gh2 7.Kf1 hg1Q 8.Kg1 (Kucharkowski-Meybohm gambit, 6 players, 10 days move)
    • 1.b4 e5 2.Bb2 f6 3.e4 Bb4 4.Bc4 (Sokolski gambit, 4 players, 3 days/move)
    • 1.c4 Nf6 2.b4 (English orangutan, 4 players, 3 days/move)
    • 1.e4 c5 2.b4 (Sicilian: Wing gambit, 4 players, 10 days/move)
    • 1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4 (French: Wing gambit, 4 players, 3 days/move)

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