[Event "Frankfurt-ch"]
[Site "Frankfurt"]
[Date "2005.06.13"]
[Round "7"]
[White "Junker, Christian"]
[Black "Kolko, Robert"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "1555"]
[BlackElo "1767"]
[PlyCount "206"]
[EventDate "2005.04.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nb6 5. Nf3 Bg4 6. Be2 e6 7. 0-0 Nc6 8. Be3 Be7 9. Nbd2 Bf6 10. Ne4 Be7 11. Rc1 0-0 12. h3 Bf5 13. Ng3 Bg6 14. a3 Bf6 15. Qd2 a6 16. Rfd1 Qe7 17. Bd3 Bxd3 18. Qxd3 Rad8 19. Qc2 Rd7 20. Ne4 h6 21. Nc5 Rdd8 22. Nxb7 Rb8 23. Nc5 a5 24. Qe4 Nd8 25. Qg4 Kh8 26. Qg3 Rg8 27. Bf4 Rc8 28. Na6 c6 29. Bd6 Qa7 30. Nc5 Nb7 31. Be5 Nxc5 32. dxc5 Nd7 33. b4 Nxe5 34. Nxe5 Qc7 35. Rd6 Qb7 36. Rcd1 Bxe5 37. Qxe5 axb4 38. Rd7 Qb8 39. R1d6 bxa3 40. Qa1 Qb2 41. Qxb2 axb2 42. Rd1 Rb8 43. Rb1 Rb4 44. Rd2 Rgb8 45. Rc2 g5 46. Kf1 Kg7 47. Ke2 Kf6 48. Kf3 Ke5 49. Ke3 Rb3+ 50. Kd2 Kd4 51. f3 Kxc5 52. Rc3 Kd4 53. Rc2 c5 54. Ke2 R8b4 55. Rd1+ Ke5 56. Rb1 Kf4 57. Kd2 Ke5 58. Ke2 f5 59. Kf2 Kf6 60. Rd2 h5 61. Ke2 Ke5 62. Kf2 Ra4 63. Re2+ Kf6 64. Rexb2 Rxb2+ 65. Rxb2 Rxc4 66. Ke3 Ke5 67. Rb8 Rc2 68. g4 fxg4 69. fxg4 hxg4 70. hxg4 Rc3+ 71. Kd2 Rg3 72. Rc8 Rxg4 73. Rxc5+ Kf6 74. Ke3 e5 75. Kf3 Rb4 76. Rc8 Ke6 77. Rg8 Kf6 78. Rf8+ Ke6 79. Rg8 Kf6 80. Rf8+ Ke7 81. Rf5 g4+ 82. Kg3 Ke6 83. Rg5 Kd5 84. Rf5 Re4 85. Rf8 Kd4 86. Rd8+ Ke3 87. Re8 Ke2 88. Re7 Ke1 89. Rg7 Rf4 90. Rxg4 Rf5 91. Re4+ Kd2 92. Ra4 Rf8 93. Re4 Re8 94. Kg4 Kd3 95. Kf5 Rf8+ 96. Kxe5 Re8+ 97. Kd5 Rxe4 98. Kc5 Rd4 99. Kc6 Kc4 100. Kc7 Rd5 101. Kc6 Kd4 102. Kc7 Kc5 103. Kb7 Rd6 0-1

[Event "Frankfurt-ch"]
[Site "Frankfurt"]
[Date "2005.06.06"]
[Round "6"]
[White "Kolko, Robert"]
[Black "Proestler, Rene"]
[Result "0-1"]
[ECO "D04"]
[WhiteElo "1767"]
[BlackElo "1615"]
[PlyCount "101"]
[EventDate "2005.04.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. e3 Bg4 4. Nbd2 e6 5. Bd3 Bd6 6. c3 c6 7. 0-0 Qc7 8. h3 h5 9. e4 dxe4 10. Nxe4 Nxe4 11. Bxe4 Nd7 12. Re1 Bxf3 13. Qxf3 Nf6 14. Bc2 0-0-0 15. Bg5 Be7 16. b4 a5 17. bxa5 Qxa5 18. Reb1 Qxg5 19. Rb3 Qd5 20. Qe2 Rd7 21. a4 Qa5 22. Rab1 g5 23. c4 g4 24. h4 Rc7 25. g3 Rd8 26. Qd3 Bc5 27. d5 cxd5 28. Rb5 Qa7 29. Qe2 dxc4 30. Kg2 c3 31. Bd3 Bxf2 32. Bc4 Qe3 33. Bxe6+ fxe6 34. Qc2 Qxg3+ 35. Kf1 Qg1+ 36. Ke2 Rd2+ 37. Qxd2 cxd2 38. Kxd2 Be3+ 39. Kd3 Qf2 40. R1b2 Rd7+ 41. Kc4 Qf4+ 42. Kb3 Bc1 43. Rc2+ Kb8 44. Rbc5 Qe3+ 45. R5c3 Rd3 46. Rxc1 Qxc1 47. Rxd3 Qb1+ 48. Kc4 Qc2+ 49. Kd4 e5+ 50. Ke3 Qc5+ 51. Ke2 0-1

[Event "Frankfurt-ch"]
[Site "Frankfurt"]
[Date "2005.05.30"]
[Round "5"]
[White "Bonilla Guzman, Jerson Andres"]
[Black "Kolko, Robert"]
[Result "1/2-1/2"]
[ECO "E61"]
[WhiteElo "1067"]
[BlackElo "1767"]
[PlyCount "50"]
[EventDate "2005.04.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. e3 g6 4. Nf3 Bg7 5. Nc3 0-0 6. Bd3 b6 7. 0-0 Bb7 8. d5 d6 9. e4 Nbd7 10. Re1 Ne8 11. Be3 a6 12. Qd2 e6 13. Bh6 e5 14. Bxg7 Kxg7 15. Ng5 h6 16. Nh3 Bc8 17. f4 exf4 18. Qxf4 Ne5 19. Re3 Bxh3 20. Rxh3 Qg5 21. Qxg5 hxg5 22. b3 Ra7 23. Re1 Re7 24. Bc2 Rh8 25. Rg3 f6 1/2-1/2

[Event "Frankfurt-ch"]
[Site "Frankfurt"]
[Date "2005.05.23"]
[Round "4"]
[White "Kolko, Robert"]
[Black "Gottlieb, Herbert"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "1767"]
[BlackElo "1579"]
[PlyCount "98"]
[EventDate "2005.04.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 e6 2. d4 b6 3. c4 Bb7 4. Nc3 Bb4 5. Bd3 f5 6. Qc2 Nf6 7. Bg5 fxe4 8. Be2 0-0 9. a3 Bxc3+ 10. Qxc3 h6 11. Bh4 d5 12. Nh3 Nbd7 13. f3 g5 14. Bg3 Rc8 15. c5 c6 16. Nf2 exf3 17. gxf3 Rf7 18. h4 Nh5 19. Bd6 gxh4 20. Rg1+ Rg7 21. 0-0-0 Ng3 22. Bd3 Qf6 23. Ng4 Rxg4 24. fxg4 bxc5 25. Qb3 Ba8 26. dxc5 e5 27. Kb1 e4 28. Bxg3 hxg3 29. Bc2 Rb8 30. Qa2 Nxc5 31. Rxg3 Qf2 32. Rgg1 Qf6 33. Rdf1 Qg7 34. a4 a5 35. Rg2 e3 36. Qa3 Rb4 37. Rfg1 Bb7 38. g5 h5 39. Bd1 Ba6 40. Qxe3 Bd3+ 41. Ka2 Bc4+ 42. Ka1 Ne4 43. g6 Qb7 44. Qh6 Qg7 45. Qxh5 Nf6 46. Qh4 Bf1 47. Qe1 Bxg2 48. Qe6+ Kf8 49. Rxg2 Rh4 1/2-1/2

[Event "Frankfurt-ch"]
[Site "Frankfurt"]
[Date "2005.05.09"]
[Round "3"]
[White "Schiffer, Steve"]
[Black "Kolko, Robert"]
[Result "1-0"]
[ECO "B15"]
[WhiteElo "2054"]
[BlackElo "1767"]
[PlyCount "57"]
[EventDate "2005.04.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Ng3 Qc7 6. Nf3 Bg4 7. Bd3 e6 8. h3 Bxf3 9. Qxf3 Nbd7 10. 0-0 Be7 11. Re1 0-0-0 12. Nf5 Bf8 13. Ne3 Nb6 14. c3 h6 15. a4 Nbd5 16. Nc2 Be7 17. Bd2 g5 18. g3 g4 19. hxg4 Rdg8 20. a5 Qd7 21. c4 Nc7 22. Bc3 Nce8 23. d5 cxd5 24. cxd5 Rxg4 25. dxe6 fxe6 26. Rxe6 Bc5 27. Bf5 Rxg3+ 28. Qxg3 Rg8 29. Rxe8+ 1-0

[Event "Frankfurt-ch"]
[Site "Frankfurt"]
[Date "2005.04.25"]
[Round "1"]
[White "Kolko, Robert"]
[Black "Reschke, Stefan"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "1767"]
[BlackElo "2285"]
[PlyCount "64"]
[EventDate "2005.04.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 e6 3. e4 h6 4. Bxf6 Qxf6 5. e5 Qd8 6. Bd3 d5 7. f4 c5 8. c3 Nc6 9. Bb5 Qb6 10. Bxc6+ bxc6 11. Qb3 cxd4 12. Qxb6 axb6 13. cxd4 g5 14. Ne2 Ba6 15. Nbc3 c5 16. Na4 Bxe2 17. Nxb6 Ra6 18. Nxd5 exd5 19. Kxe2 cxd4 20. Rhd1 Kd7 21. Rxd4 Ke6 22. g3 Bc5 23. Rd3 Rb8 24. b3 d4 25. Kf3 gxf4 26. gxf4 Kd5 27. a3 Rxa3 28. Rxa3 Bxa3 29. Kg4 Ke4 30. Rh3 d3 31. Rxh6 d2 32. Rd6 Bxd6 0-1

[Event "FRG-ch U25 op"]
[Site "Germany"]
[Date "1989.??.??"]
[Round "?"]
[White "Bennedik, Martin"]
[Black "Kolko, Robert"]
[Result "1/2-1/2"]
[ECO "B10"]
[PlyCount "49"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c6 2. d3 d5 3. Nd2 dxe4 4. dxe4 e5 5. Ngf3 Bg4 6. Bc4 Nd7 7. 0-0 Ngf6 8. Qe2 Qc7 9. Rd1 b5 10. Bb3 Bc5 11. h3 Bh5 12. c3 0-0 13. Nf1 Rfd8 14. Ng3 Bg6 15. Bc2 Nh5 16. Nxh5 Bxh5 17. Be3 Qb6 18. Bxc5 Qxc5 19. Rd2 Nb6 20. Rad1 Rxd2 21. Qxd2 h6 22. Qd6 Qxd6 23. Rxd6 Bxf3 24. gxf3 Rc8 25. Bb3 1/2-1/2

[Event "FRG-ch U25 op"]
[Site "Germany"]
[Date "1989.??.??"]
[Round "?"]
[White "Frank, Tena"]
[Black "Kolko, Robert"]
[Result "1/2-1/2"]
[ECO "B09"]
[PlyCount "84"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 d6 2. d4 g6 3. f4 Bg7 4. Nf3 Bg4 5. Be3 Nf6 6. Bd3 0-0 7. 0-0 Nbd7 8. h3 Bxf3 9. Qxf3 c6 10. Nc3 Qc7 11. e5 Ne8 12. Bc4 e6 13. Bb3 a6 14. Ne4 h6 15. Rad1 Rc8 16. c3 d5 17. Nd2 c5 18. c4 cxd4 19. Bxd4 dxc4 20. Nxc4 b5 21. Ne3 Qc6 22. Qxc6 Rxc6 23. Rc1 Rc7 24. Rfd1 Rb7 25. Bc3 b4 26. Be1 a5 27. Bf2 Nb6 28. Nc4 Nxc4 29. Rxc4 Kh7 30. Ba4 Rb8 31. Rc5 Ra8 32. Rd7 g5 33. Bc2+ Kh8 34. fxg5 hxg5 35. Be4 Rb8 36. Rxa5 f6 37. Raa7 f5 38. Bc6 Bxe5 39. Bc5 Nf6 40. Re7 Rfd8 41. Rxe6 Rd1+ 42. Kf2 Bxb2 1/2-1/2

[Event "FRG-ch U25 op"]
[Site "Germany"]
[Date "1989.??.??"]
[Round "?"]
[White "Kolko, Robert"]
[Black "Gunde, Thomas"]
[Result "1-0"]
[ECO "D51"]
[PlyCount "112"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 e6 5. e3 Nbd7 6. Qb3 Be7 7. Bd3 dxc4 8. Bxc4 Nd5 9. Bxe7 Qxe7 10. e4 Nxc3 11. bxc3 c5 12. Ne2 cxd4 13. cxd4 b6 14. Rc1 0-0 15. 0-0 Bb7 16. f3 Rfc8 17. a4 Nf6 18. Rfd1 Rc7 19. Nf4 Rc6 20. Rc2 Rac8 21. Rdc1 Qd6 22. Ne2 Qc7 23. Bd3 Rxc2 24. Rxc2 Qd7 25. Bb5 Qd8 26. Kf2 Nd7 27. g3 Nb8 28. Rxc8 Qxc8 29. Ke3 Nc6 30. Bxc6 Bxc6 31. Qc4 Qb7 32. Nc3 a6 33. Qb4 b5 34. a5 f5 35. Qb3 Qf7 36. Ne2 Kf8 37. Nf4 Ke7 38. Qb4+ Kf6 39. e5+ Kg5 40. h4+ Kh6 41. Qd6 Qd7 42. Qxe6+ Qxe6 43. Nxe6 b4 44. Nc5 g5 45. hxg5+ Kxg5 46. Ne6+ Kg6 47. Nf4+ Kf7 48. d5 Ba4 49. Kd4 Bd1 50. d6 Bxf3 51. e6+ Ke8 52. Kc4 Bc6 53. Kxb4 Bb5 54. Kc5 Kd8 55. Kb6 Kc8 56. Nd5 h5 1-0

[Event "FRG-ch U25 op"]
[Site "Germany"]
[Date "1989.??.??"]
[Round "?"]
[White "Kolko, Robert"]
[Black "Kiwitter, Jan"]
[Result "0-1"]
[ECO "A41"]
[PlyCount "62"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 g6 2. Nf3 Bg7 3. Bf4 d6 4. Nc3 Nd7 5. e4 e5 6. dxe5 dxe5 7. Be3 Ngf6 8. Bc4 0-0 9. 0-0 Qe7 10. Qc1 c6 11. Bd3 Rd8 12. Bh6 Nc5 13. Bxg7 Kxg7 14. Rd1 Bg4 15. Qe3 Nxd3 16. Rxd3 Rxd3 17. Qxd3 Rd8 18. Qe3 Bxf3 19. Qxf3 Qb4 20. Rb1 Rd2 21. a3 Qb6 22. Qe3 Qxe3 23. fxe3 Rxc2 24. h3 h5 25. Kf1 h4 26. Kg1 b5 27. Kf1 a5 28. Ne2 Nxe4 29. Ke1 Ng3 30. Nxg3 hxg3 31. Kf1 Rf2+ 0-1

[Event "FRG-ch U25 op"]
[Site "Germany"]
[Date "1989.??.??"]
[Round "?"]
[White "Kolko, Robert"]
[Black "Komljenovic, Luka"]
[Result "0-1"]
[ECO "A70"]
[PlyCount "120"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Bd3 Bg7 8. Be3 0-0 9. Nf3 a6 10. a4 Bg4 11. h3 Bxf3 12. Qxf3 Nbd7 13. 0-0 Re8 14. Qe2 Qc7 15. f3 Nh5 16. Qd2 Rab8 17. b3 f5 18. Rfe1 f4 19. Bf2 Qa5 20. Rec1 g5 21. Ra2 Ne5 22. Be2 Ng6 23. Nb1 Qb6 24. Bc4 Qd8 25. Nc3 Qa5 26. Ne2 Qxd2 27. Rxd2 b5 28. Bd3 Ne5 29. axb5 axb5 30. Rcc2 b4 31. Ra2 Nxd3 32. Rxd3 Ra8 33. Rdd2 Ra3 34. Nc1 Rea8 35. Kf1 Rxa2 36. Nxa2 Ra3 37. Nc1 Ra1 38. Rc2 Rb1 39. Ke2 Bb2 40. Nd3 Bc3 41. Nc1 Nf6 42. Kd3 Nd7 43. Kc4 Ne5+ 44. Kb5 Kf7 45. Ka4 Ra1+ 46. Kb5 Ra3 47. Kb6 Ke7 48. Kc7 Ra1 49. Na2 Rb1 50. Nxc3 bxc3 51. Rxc3 Rb2 52. Bxc5 dxc5 53. d6+ Ke6 54. Rxc5 Rxg2 55. b4 Nd7 56. Rd5 Rc2+ 57. Kd8 h6 58. b5 Rc3 59. b6 Nxb6 60. Rb5 Rc8# 0-1

[Event "FRG-ch U25 op"]
[Site "Germany"]
[Date "1989.??.??"]
[Round "?"]
[White "Kolko, Robert"]
[Black "Lerch, Burkhard"]
[Result "1-0"]
[ECO "A45"]
[PlyCount "118"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 c5 3. d5 Ne4 4. Bf4 Qb6 5. Qc1 g5 6. Bd2 Nxd2 7. Nxd2 Bg7 8. Rb1 d6 9. e4 e6 10. c4 exd5 11. cxd5 h6 12. Bd3 Nd7 13. Nc4 Qc7 14. a4 a6 15. a5 Ne5 16. Qd2 Nxc4 17. Bxc4 b5 18. axb6 Qxb6 19. Ne2 a5 20. 0-0 0-0 21. f4 gxf4 22. Rxf4 Qb4 23. Qd3 Bd7 24. b3 f5 25. exf5 Rae8 26. Ng3 Re1+ 27. Rxe1 Qxe1+ 28. Rf1 Bd4+ 29. Kh1 Qe5 30. Qf3 Qe3 31. Qxe3 Bxe3 32. Rf3 Bd4 33. Bd3 Re8 34. Ne4 Be5 35. g4 a4 36. bxa4 Bxa4 37. Rf1 Bb3 38. Nd2 Bxd5+ 39. Be4 Bf7 40. Bc6 Rc8 41. Bd7 Rc7 42. Ba4 c4 43. Bc2 d5 44. Nf3 Bf6 45. Rd1 Re7 46. Kg1 Re2 47. Ba4 Re3 48. Kf2 Re4 49. h3 d4 50. Bc6 Re3 51. Nxd4 Bxd4 52. Rxd4 Rxh3 53. Bf3 Rh2+ 54. Bg2 c3 55. Kg3 Rxg2+ 56. Kxg2 c2 57. Rd8+ Kg7 58. Rc8 Bb3 59. Kg3 Kf6 1-0

[Event "FRG-ch U25 op"]
[Site "Germany"]
[Date "1989.??.??"]
[Round "?"]
[White "Pirrung, Robert"]
[Black "Kolko, Robert"]
[Result "1/2-1/2"]
[ECO "A96"]
[PlyCount "54"]
[EventDate "1989.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 f5 2. c4 Nf6 3. Nc3 e6 4. g3 Be7 5. Nf3 0-0 6. Bg2 d6 7. 0-0 a5 8. Qc2 Nbd7 9. e4 fxe4 10. Nxe4 Nxe4 11. Qxe4 Nf6 12. Qe2 Ne8 13. Bh3 e5 14. Bxc8 Qxc8 15. dxe5 Qg4 16. Kg2 dxe5 17. Re1 Bf6 18. Nxe5 Qxe2 19. Rxe2 Bxe5 20. Rxe5 Nf6 21. Bf4 c6 22. Rae1 Rfe8 23. Bg5 Rxe5 24. Rxe5 Kf7 25. Re2 b5 26. cxb5 cxb5 27. a3 a4 1/2-1/2

