g.mueller: here find you a lot info about

Chess Programming Part I: Getting Started
http://www.gamedev.net/reference/pr...

<rest via first link>

Chess Programming Part II: Data Structures
http://www.gamedev.net/reference/ar...

Chess Programming Part III: Move Generation
http://www.gamedev.net/reference/ar...

Chess Programming Part IV: Basic Search
http://www.gamedev.net/reference/ar...

Chess Programming Part V: Advanced Search
http://www.gamedev.net/reference/ar...

Ceri: Hi, all.

For future games, unless we know that we are playing a chess engine and nothing else, we have to play the opponent, not any machine.

For those of you who like to see how chess engines evaluate positions, you might care to run your engines over the following:

White has a completely won game by move 39 but I am far from certain that engines can indentify the winning ideas.

Of course, there is a new version of Rybka in the offing, so the bar might be raised further soon.

[White "Ceri"] [Black "Crapov"]
[Result "1-0"]

1. Nf3 d5 2. c4 c6 3. d4 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 9. dxe5 Nxe5 10. Bf4 Rd8 11. Qc1 Bd6 12. Nxd6+ Qxd6 13. Bg2 O-O 14. O-O Rfe8 15. Qe3 Qd4 16. a5 Qxe3 17. Bxe3 a6 18. Bg5 Nc4 19. Ra4 Be6 20. Rb4 Nd6 21. e3 h6 22. Bxf6 gxf6 23. Rc1 Kg7 24. Na4 Nb5 25. Nc5 Re7 26. h4 f5 27. Bf3 Kg6 28. Kf1 Bc8 29. Be2 Kf6 30. Ke1 Rd5 31. Bf3 Rd8 32. Rd1 Rxd1+ 33. Kxd1 Re5 34. Nd3 Re7 35. Rf4 Rd7 36. Kc2 Rd8 37. Nc5 Ke7 38. Be2 Nc7 39. Bc4 Ne6 40. Bxe6 fxe6 41. Rd4 Rd5 42. b4 e5 43. Rd3 e4 44. Rd4 Rd6 45. Kc3 Rg6 46. Rd1 Rg8 47. Kc4 h5 48. Rd2 Rf8 49. Na4 Rf7 50. Nc3 Rf6 51. Ne2 Rd6 52. Rxd6 Kxd6 53. g4 Be6+ 54. Kd4 hxg4 55. h5 Bf7 56. h6 Bg8 57. Nf4 Bh7 58. Nh5 Ke7 59. Ke5 1-0

Cheers,

1. Nf3 d5 2. c4 c6 3. d4 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 9. dxe5 Nxe5 10. Bf4 Rd8 11. Qc1 Bd6 12. Nxd6+ Qxd6 13. Bg2 O-O 14. O-O Rfe8 15. Qe3 Qd4 16. a5 Qxe3 17. Bxe3 a6 18. Bg5 Nc4 19. Ra4 Be6 20. Rb4 Nd6 21. e3 h6 22. Bxf6 gxf6 23. Rc1 Kg7 24. Na4 Nb5 25. Nc5 Re7 26. h4 f5 27. Bf3 Kg6 28. Kf1 Bc8 29. Be2 Kf6 30. Ke1 Rd5 31. Bf3 Rd8 32. Rd1 Rxd1+ 33. Kxd1 Re5 34. Nd3 Re7 35. Rf4 Rd7 36. Kc2 Rd8 37. Nc5 Ke7 38. Be2 Nc7 <39. Bc4> Ne6 40. Bxe6 fxe6 41. Rd4 Rd5 42. b4 e5 43. Rd3 e4 44. Rd4 Rd6 45. Kc3 Rg6 46. Rd1 Rg8 47. Kc4 h5 48. Rd2 Rf8 49. Na4 Rf7 50. Nc3 Rf6 51. Ne2 Rd6 52. Rxd6 Kxd6 53. g4 Be6+ 54. Kd4 hxg4 55. h5 Bf7 56. h6 Bg8 57. Nf4 Bh7 58. Nh5 Ke7 59. Ke5

Ceri, Blitz:10080'+259200"

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Analysis by Fruit 2.3.1 (23-ply):

1. (0.49): 39...Ne6 40.Bxe6 fxe6 41.Rd4 Rd5 42.Rxd5 cxd5 43.Kc3 Kd6 44.b4 Ke5 45.Kd3 Kd6 46.Kd4 e5+ 47.Kd3 e4+ 48.Kd4 Kc6 49.Kc3 Kb5 50.Kb3 Kc6 51.Kc2 Kb5 52.Kc3 h5 53.Kb3

2. (0.78): 39...Rg8 40.Kd3 Rg4 41.Rd4 Rg7 42.e4 fxe4+ 43.Rxe4+ Kd8 44.Re5 f6 45.Re3 Re7 46.Rxe7 Kxe7 47.f3 Ne8 48.g4 Nd6 49.Bb3 Bd7 50.Kd4 Be8 51.Bc2 Bd7 52.Nxd7 Kxd7

3. (0.80): 39...Rd6 40.Bd3 Nd5 41.Rd4 Nc7 42.Rc4 Rd8 43.b3 Nd5 44.Kd2 Nc7 45.Rf4 Kf6 46.b4 Nb5 47.Kc2 Nd6 48.Rd4 Be6 49.Rxd6 Rxd6 50.Nxb7 Bb3+ 51.Kc3 Rd7 52.Bxa6

4. (0.81): 39...Ne8 40.Bd3 Rd5 41.b4 Nc7 42.Kb2 Ne8 43.Kc1 Nc7 44.Kd2 Ne8 45.Kd1 Nc7 46.Ke1 Re5 47.Bc4 Ne6 48.Nd3 Re4 49.Bxe6 Rxe6 50.Rd4 Rd6 51.Rxd6 Kxd6

5. (0.82): 39...Nb5 40.Bxb5 cxb5 41.b4 Rd6 42.Nb3 Be6 43.Nd4 Rd5 44.Kc3 Re5 45.Kd2 Rd5 46.Kc2 Re5 47.Kd3 Bc4+ 48.Kd2 Be6 49.Nxe6 fxe6 50.Rd4 Rd5 51.Rxd5 exd5 52.Kc3 Kd6 53.Kd4

6. (0.86): 39...Kf6 40.e4 Nb5 41.Bd3 h5 42.Kd2 Ke5 43.exf5 Rd5 44.b4 Rd8 45.Kc2 Nd6 46.f6 Rg8 47.Be2 Bg4 48.Bxg4 Rxg4 49.Nd3+ Ke6 50.Kd2 Ne4+ 51.Rxe4+ Rxe4 52.Nc5+ Ke5 53.Nxe4 Kxe4 54.Kc3 Ke5

1. Nf3 d5 2. c4 c6 3. d4 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 9. dxe5 Nxe5 10. Bf4 Rd8 11. Qc1 Bd6 12. Nxd6+ Qxd6 13. Bg2 O-O 14. O-O Rfe8 15. Qe3 Qd4 16. a5 Qxe3 17. Bxe3 a6 18. Bg5 Nc4 19. Ra4 Be6 20. Rb4 Nd6 21. e3 h6 22. Bxf6 gxf6 23. Rc1 Kg7 24. Na4 Nb5 25. Nc5 Re7 26. h4 f5 27. Bf3 Kg6 28. Kf1 Bc8 29. Be2 Kf6 30. Ke1 Rd5 31. Bf3 Rd8 32. Rd1 Rxd1+ 33. Kxd1 Re5 34. Nd3 Re7 35. Rf4 Rd7 36. Kc2 Rd8 37. Nc5 Ke7 38. Be2 Nc7 <39. Bc4> Ne6 40. Bxe6 fxe6 41. Rd4 <<Rd5>> 42. b4 e5 43. Rd3 e4 44. Rd4 Rd6 45. Kc3 Rg6 46. Rd1 Rg8 47. Kc4 h5 48. Rd2 Rf8 49. Na4 Rf7 50. Nc3 Rf6 51. Ne2 Rd6 52. Rxd6 Kxd6 53. g4 Be6+ 54. Kd4 hxg4 55. h5 Bf7 56. h6 Bg8 57. Nf4 Bh7 58. Nh5 Ke7 59. Ke5

Ceri, Blitz:10080'+259200"

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Analysis by Fruit 2.3.1 (33-ply):

1. (0.91): 42.Rxd5 cxd5 43.f4 Kd6 44.Nd3 d4 45.Ne5 dxe3 46.Kd3 Kc5 47.g4 fxg4 48.Nxg4 e5 49.Nxe5 e2 50.Kxe2 Kd5 51.Ke3 Bh3 52.Nf7 h5 53.Ng5 Bg2 54.Nf3 Ke6 55.Kf2 Bh1 56.Nd4+ Kf6 57.Ne2 Be4

2. (0.37): 42.b4 e5 43.Rd3 e4 44.Rd2 Rxd2+ 45.Kxd2 Kd6 46.Kc3 Kd5 47.Kb3 h5 48.Na4 Be6 49.Kc3 Ke5 50.Kc2 Kd6 51.Kb2 Bc8 52.Nc5 Kd5 53.Kb3 Ke5 54.Ka4 Kf6 55.Ka3 Ke7 56.Kb3 Kf7 57.Kc3 Ke7

3. (0.36): 42.Na4 e5 43.Rxd5 cxd5 44.b4 Kd6 45.Nc5 Ke7 46.Kd2 Kd6 47.Kd3 Kc6 48.Nb3 Kc7 49.Kc3 Kd6 50.f4 e4 51.Kd2 Kc6 52.Nd4+ Kd6 53.Kc2 Be6 54.Nb3 Kc6 55.Nc5 Bc8 56.Kc3 h5 57.Nb3 Kd6

4. (0.24): 42.Rc4 e5 43.Rc3 Kd6 44.b4 e4 45.Ra3 h5 46.Ra1 Kc7 47.Kc3 Rd8 48.Rc1 Rd6 49.Rf1 Rd8 50.Rh1 Rd6 51.Rc1 Rd5 52.Re1 Rd8 53.Re2 Re8 54.Rc2 Be6 55.Rd2 Bd5 56.Rd1 Rd8 57.Rd4 Rg8

5. (0.00): 42.Nb3 Rb5 43.Rc4 Kd6 44.Rd4+ Ke7

6. (-1.00): 42.Nd3 Rxa5 43.b4 Rb5 44.f4 a5 45.Kc3 Bd7 46.bxa5 Rxa5 47.Ne5 Be8 48.Kb2 c5 49.Rc4 h5 50.e4 b6 51.exf5 exf5 52.Rc3 Bb5 53.Re3 Kf6 54.Kc2 Ra8 55.Kb2 Ra4 56.Rb3 Ra5 57.Kc3 Kg7

The World - Gert Jan Timmerman, Chessgames Challenge 2007

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Analysis by Fruit 2.3.1 (36-ply):

1. (10.26): 60.Ke3 c3 61.Rb5+ Kc4 62.Rxh5 Nf4 63.Rg5 c2 64.Kd2 Kb3 65.Rg3+ Kb2 66.Rc3 Nh5 67.Rxc2+ Ka3 68.Rc5 Nf6 69.Rxa5 Ne4+ 70.Kc2 Nd6 71.Rd5 Nc4 72.Rd3+ Kxa4 73.Rd4 Kb5 74.Rxc4 Kxc4 75.h5 Kd5

2. (10.21): 60.Rb1 c3 61.Rh1 Kb4 62.Rxh3 c2 63.Rh1 Kxa4 64.Ke3 Kb3 65.Kd3 a4 66.Rc1 a3 67.Rxc2 a2 68.Rxa2 Kxa2 69.Ke4 Ka3 70.Kf5 Kb3 71.Kg5 Kc4 72.Kxh5 Kd5 73.Kg6 Ke5 74.h5 Ke6 75.h6 Ke7

3. (10.21): 60.Rb2 Kd4 61.Rh2 Ng1+ 62.Kf2 c3 63.Rh1 Nh3+ 64.Rxh3 c2 65.Rh1 Kd3 66.Kf3 Kd2 67.Kf4 c1Q 68.Rxc1 Kxc1 69.Kg5 Kb2 70.Kxh5 Kb3 71.Kg5 Kxa4 72.h5 Kb3 73.h6 a4 74.h7 Kb4 75.h8Q Kb3

4. (10.21): 60.Rf8 c3 61.Ke3 Kb4 62.Rf3 c2 63.Kd2 Ng1 64.Re3 Kxa4 65.Kxc2 Kb4 66.Kd2 a4 67.Rg3 Ne2 68.Kxe2 a3 69.Ke3 Kc4 70.Rg1 Kb4 71.Rc1 a2 72.Ra1 Kb3 73.Kf4 Ka3 74.Kg5 Kb2 75.Rxa2+ Kxa2

5. (9.93): 60.Kg3 Ng1 61.Re8 c3 62.Re1 Kd4 63.Rxg1 Ke3 64.Rg2 Ke4 65.Rf2 Ke3 66.Ra2 Kd3 67.Kf4 c2 68.Ra1 Kc3 69.Rh1 Kb2 70.Kg5 c1Q+ 71.Rxc1 Kxc1 72.Kxh5 Kb2 73.Kg5 Kb3 74.h5 Kxa4 75.h6 Kb5

6. (9.38): 60.Rh8 c3 61.Ke3 Kb4 62.Rxh5 Nf4 63.Rf5 Ng2+ 64.Ke2 Ka3 65.h5 Kb2 66.Rb5+ Kc1 67.Kf3 Ne1+ 68.Ke4 c2 69.h6 Kd1 70.Rd5+ Ke2 71.Rc5 Kd2 72.Rc7 Nd3 73.h7 c1Q 74.Rxc1 Nxc1 75.h8Q Kc2

7. (6.86): 60.Rb5+ Kd4 61.Rxh5 c3 62.Rh7 c2 63.Rc7 Kd3 64.Kg4 Nf2+ 65.Kf4 Nh3+ 66.Kf5 Ng1 67.Rxc2 Kxc2 68.h5 Ne2 69.h6 Nd4+ 70.Kf6 Kb3 71.h7 Kxa4 72.h8Q Kb4 73.Qh4 Kc5 74.Qg5+ Kb4 75.Qd2+ Kc4

The World - Gert Jan Timmerman, Chessgames Challenge 2007

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Analysis by Fruit 2.3.1 (34-ply):

1. (10.48): 60.Ke3 Kc6 61.Rb5 Ne1 62.Rxh5 c3 63.Rh7 Kd6 64.h5 Nc2+ 65.Kd3 Nb4+ 66.Kxc3 Nd5+ 67.Kd4 Nf6 68.Rh6 Ke7 69.Rxf6 Kxf6 70.Kc4 Kg5 71.Kb5 Kxh5 72.Kxa5 Kg5 73.Kb5 Kg6 74.Kc6 Kf6 75.Kd6 Kg6

2. (5.24): 60.Rb5+ Kd4 61.Ke2 c3 62.Kd1 Kc4 63.Rxa5 Kb3 64.Rb5+ Kxa4 65.Rxh5 Kb3 66.Rb5+ Kc4 67.Rb8 Nf4 68.Kc2 Kc5 69.Rf8 Ne6 70.Rc8+ Kb4 71.h5 Nd4+ 72.Kd3 Nf5 73.Rc4+ Kb5 74.Rf4 Ne7 75.h6 Kc5

3. (5.17): 60.Ke2 Kd4 61.Ra8 Nc5 62.Rxa5 c3 63.Kd1 Kc4 64.Ra8 Kb3 65.a5 c2+ 66.Kd2 Ne4+ 67.Kc1 Nc5 68.Rc8 Kb4 69.Kxc2 Na6 70.Rh8 Kxa5 71.Rxh5+ Kb4 72.Rh8 Kc5 73.h5 Nb4+ 74.Kc1 Kd6 75.Kd2 Kd5

The World - Gert Jan Timmerman, Chessgames Challenge 2007

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Analysis by Fruit 2.3.1 (34-ply):

1. (10.34): 60.Rb5+ Kd4 61.Rxh5 c3 62.Ke2 Nh2 63.Kd1 Nf3 64.Rf5 Ne5 65.Rxe5 Kxe5 66.Kc2 Kd4 67.h5 Ke5 68.Kxc3 Kf6 69.Kc4 Kg5 70.Kb5 Kxh5 71.Kxa5 Kg6 72.Kb5 Kf7 73.a5 Ke6 74.Kb6 Kd5 75.a6 Kd6

2. (6.46): 60.Rh8 Nf6 61.Rh6 Ne8 62.Rxh5+ Kb4 63.Rg5 c3 64.Ke2 Kb3 65.Kd1 Nf6 66.Rxa5 Ne4 67.Rb5+ Kxa4 68.Rf5 Ka3 69.h5 Ng3 70.Ra5+ Kb3 71.Rb5+ Kc4 72.h6 Kxb5 73.h7 Nf5 74.h8Q Ne3+ 75.Ke2 Nd5

3. (6.45): 60.Ke2 Kd4 61.Rb5 Nf6 62.Rxa5 Nd5 63.Ra7 Nf4+ 64.Kd1 Kc5 65.Rf7 Ng2 66.a5 Kb5 67.Rf5+ Ka6 68.Rxh5 Kb7 69.Kd2 Ka6 70.Kc3 Nxh4 71.Rxh4 Kxa5 72.Rg4 Kb6 73.Rxc4 Kb7 74.Kb4 Kb6 75.Rc5 Ka6

4. (5.26): 60.Rb2 Ne5+ 61.Ke2 Kc6 62.Rb5 Ng6 63.Rxa5 Nxh4 64.Rxh5 Ng2 65.Kd2 Kb7 66.Rf5 Nh4 67.Rf7+ Kc8 68.Kc3 Ng6 69.a5 Ne5 70.Rh7 Kb8 71.Kd4 Nc6+ 72.Kc5 Nxa5 73.Kb6 Kc8 74.Kxa5 c3 75.Kb6 Kd8

5. (5.17): 60.Rb7 c3 61.Rb5+ Kc4 62.Ke2 Nf6 63.Kd1 Ng4 64.Rxa5 Ne3+ 65.Kc1 Nd5 66.Rb5 Nf4 67.Kd1 Kd3 68.Rc5 Kd4 69.Rf5 Nd3 70.a5 Kc4 71.Rxh5 Nf2+ 72.Kc2 Nd3 73.Rh6 Nb4+ 74.Kc1 Nd3+ 75.Kd1 Kc5

6. (5.16): 60.Rb1 c3 61.Rb5+ Kc4 62.Ke2 Nf6 63.Kd1 Ng4 64.Rxa5 Kb3 65.Kc1 Nf2 66.Rd5 Kxa4 67.Kc2 Kb4 68.Rxh5 Kc4 69.Rg5 Ne4 70.Rg4 Kd5 71.h5 Nf6 72.h6 Ke6 73.Rg7 Kf5 74.Kxc3 Ne4+ 75.Kc2 Kf6

The World - Gert Jan Timmerman, Chessgames Challenge 2007

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Analysis by Fruit 2.3.1 (32-ply):

1. (10.21): 60.Rb5+ Kd6 61.Rxh5 c3 62.Rh6+ Ke7 63.h5 Kf7 64.Rh7+ Kf6 65.Ra7 c2 66.Rc7 Nb2 67.Rxc2 Nd3 68.Ke3 Nb4 69.Rg2 Kf5 70.h6 Nd5+ 71.Kd4 Nf6 72.Rf2+ Kg6 73.Rxf6+ Kxf6 74.Kc5 Kg6 75.Kb5 Kxh6

2. (9.73): 60.Rh8 Nc3 61.Rxh5+ Kb4 62.Rg5 Na2 63.Ke3 c3 64.Rg1 c2 65.Kd2 Kb3 66.h5 Kb2 67.h6 c1Q+ 68.Rxc1 Nxc1 69.h7 Nb3+ 70.Kd1 Nd4 71.h8Q Kc3 72.Qe5 Kd3 73.Qxa5 Ke4 74.Qc3 Kd5 75.a5 Nb5

3. (5.76): 60.Rc8+ Kb4 61.Rh8 c3 62.Ke2 c2 63.Kd2 Kb3 64.Rxh5 Nc3 65.Rh8 Ne4+ 66.Kc1 Ng3 67.Rb8+ Kxa4 68.Kxc2 Nh5 69.Rh8 Nf4 70.Rg8 Kb5 71.h5 Nxh5 72.Rg5+ Kb4 73.Rxh5 a4 74.Rh4+ Kb5 75.Rd4 Kc5

4. (5.67): 60.Ra8 Kb4 61.Rh8 c3 62.Ke2 c2 63.Kd2 Kxa4 64.Rxh5 Kb4 65.Rh8 Ne3 66.h5 Ng4 67.Rg8 Nh6 68.Rg6 Nf5 69.h6 Nxh6 70.Rxh6 a4 71.Kxc2 Kc5 72.Ra6 a3 73.Rxa3 Kb5 74.Kc3 Kb6 75.Kc4 Kc6

5. (5.67): 60.Rd8 Nb2 61.Rh8 Kd4 62.Rxh5 c3 63.Ke2 Nxa4 64.Rxa5 Nb6 65.Kd1 Nd5 66.h5 Nf6 67.h6 Ke4 68.Ra7 Kf4 69.h7 Nxh7 70.Rxh7 Ke3 71.Kc2 Kd4 72.Rh5 Ke3 73.Kxc3 Kf3 74.Kd4 Kg4 75.Ra5 Kf4

6. (5.62): 60.Rf8 Nb2 61.Rf5+ Kd4 62.Rxh5 Nd3 63.Rh8 c3 64.Rd8+ Kc4 65.Ke3 Ne5 66.Rc8+ Kb3 67.h5 Nf7 68.Rc5 Kb4 69.Rc7 Nh6 70.Kd3 Kxa4 71.Kxc3 Kb5 72.Rg7 Ka4 73.Rd7 Ka3 74.Rd6 Ng4 75.h6 Nf2

RandomVisitor: For the curious, analysis of the position if GMT had played 36...Kf6:

click for larger view

After 652 hours of analysis (27 days)

37.Rf1 h5 38.h3 Rb6 39.Kg2 h4 40.f5 g5 41.Rfd1 Ke7 42.Kf1 Kd6 43.Ke2 Na2 (0.64) Depth: 36 141:22:25 235170637kN, tb=800556

37.Rf1 h5 38.h3 Rb6 39.Kg2 h4 40.f5 g5 41.Kg1 Ra6 42.Rc3 Ra7 43.Kg2 Rb7 (0.64) Depth: 37 337:44:57 553232671kN, tb=4685411

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 <g4> 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <20...g4>

Prof. Robert I Reynolds - Gert Jan Timmerman, WC15 Final ICCF 1997

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Analysis by Fruit 2.3.1 (19-ply):

1. (-3.32): 21.Ne5 Bxd4 22.Nxd4 Qxe5+ 23.Ne2 gxh3 24.gxh3 Rg8 25.Rg1 h4 26.g4 d4 27.Be4 Nd7 28.Rf1 Nf6 29.Bg6+ Kd8 30.0-0-0 c5 31.Kb1 Bd7 32.Ka1 Kc7

2. (-3.73): 21.hxg4 hxg4 22.Rxh8 Qxh8 23.Ne5 Bxd4 24.Nxc7+ Ke7 25.Nxg4 Ra5 26.Qb3 Bc5 27.0-0-0 Qg7 28.Be2 Bd7 29.Rd3 Kd8 30.Nxd5 exd5 31.Qxc3 Qxc3+ 32.Rxc3 Bd4 33.Rf3 Ne6

3. (-3.77): 21.Nh4 Bd7 22.Rf1 Qg7 23.0-0-0 Bxb5 24.Bxb5+ c6 25.Bd3 Bxd4 26.Ng6 Qh6+ 27.Kb1 Rg8 28.Nxf8 Rxf8 29.Rxf8+ Kxf8 30.Qb3 Ra7 31.Rf1+ Ke8 32.Qb4 Bf6 33.Rf4 b5

4. (-3.77): 21.Nh2 Bd7 22.Rf1 Qg7 23.0-0-0 Bxb5 24.Bxb5+ c6 25.Be2 gxh3 26.gxh3 Bxd4 27.Kb1 Be5 28.Nf3 Bxg3 29.Nd4 e5 30.Nf5 Qg5 31.Nxg3 Qxg3

5. (-4.01): 21.Ng1 c6 22.Nd6+ Kd7 23.Nxc8 Bxd4 24.0-0-0 Kxc8 25.Rf1 Qg7 26.Ne2 Be3+ 27.Kd1 gxh3 28.gxh3 Ra3 29.Rf3 Qe5 30.Nxc3 Bg5 31.Nb1 Ra5 32.Nc3

6. (-4.68): 21.Rf1 gxf3 22.Rxf3 Qe7 23.Rd1 Kd8 24.Be2 c6 25.Nxc3 Qg7 26.Qd2 Nd7 27.Qf4 e5 28.dxe5 Nxe5 29.Qf6+ Qxf6 30.Rxf6 Bd7 31.Rxd5 cxd5 32.Rxb6 d4 33.Nd5 Rxa2 34.Rxb7

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 <Qxf6> 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <19...Qxf6>

Prof. Robert I Reynolds - Gert Jan Timmerman, WC15 Final ICCF 1997

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Analysis by Fruit 2.3.1 (19-ply):

1. (-2.10): 20.0-0-0 g4 21.hxg4 hxg4 22.Rxh8 Qxh8 23.Ne5 Qg7 24.Qxc3 Kd8 25.Bd3 Nd7 26.Ng6 Rxa2 27.Nf4 Nf8 28.Kb1 Rf2 29.Re1 Bd7 30.Re5 Kc8

2. (-2.81): 20.a4 g4 21.hxg4 hxg4 22.Rxh8 Qxh8 23.Ne5 Qg7 24.0-0-0 Nd7 25.Qg6+ Qxg6 26.Nxg6 Rxa4 27.Kc2 Kf7 28.Nf4 Nf6 29.Kb3 Ra8 30.Nxc3 c5 31.dxc5 Bxc5

3. (-2.84): 20.Qd3 g4 21.hxg4 hxg4 22.Rxh8 Qxh8 23.Ne5 Qg7 24.Kd1 Nd7 25.Qxc3 Nxe5 26.dxe5 Qf8 27.Be2 Qf2 28.Qe1 Qf5 29.Qc3 Kd8 30.Bd3 Qf2 31.Be2 Qg1+ 32.Qe1

4. (-2.90): 20.Be2 g4 21.Ne5 Nd7 22.Rf1 Qg7 23.Ng6 Rh6 24.Bd3 Kd8 25.a4 c6 26.Nd6 Bxd4 27.Nf7+ Kc7 28.Nxh6 Qxh6 29.Kd1 Qg5 30.Rf7 gxh3

5. (-2.91): 20.Rd1 Bd7 21.a4 Bc6 22.Be2 Bxb5 23.Bxb5+ c6 24.Bxc6+ bxc6 25.0-0 Nd7 26.Qxc3 Rxa4 27.Kh2 c5 28.Nxg5 Qxg5 29.dxc5 Qe5 30.Qxe5 Nxe5 31.cxb6 Rh7 32.Rf4

6. (-2.92): 20.Qf2 e5 21.Nxc3 Be6 22.Rb1 e4 23.Rxb6 cxb6 24.Bb5+ Bd7 25.Qe2 Rc8 26.Bxd7+ Nxd7 27.Qe3 Rxc3 28.Qxc3 exf3 29.0-0 0-0 30.gxf3 h4 31.gxh4 gxh4 32.Rf2 Qg5+ 33.Rg2

7. (-2.94): 20.Kd1 g4 21.hxg4 hxg4 22.Rxh8 Qxh8 23.Ne5 Qf6 24.Bd3 Kd8 25.Qxc3 Nd7 26.Be2 Nxe5 27.dxe5 Qf2 28.Qc1 Qg1+ 29.Kc2 Qxc1+ 30.Kxc1 Bf2 31.Bxg4 Bxg3 32.Kd2 Bxe5

8. (-3.22): 20.h4 g4 21.Ng5 c6 22.0-0-0 cxb5 23.Bxb5+ Bd7 24.Bxd7+ Nxd7 25.Nxe6 Qh6+ 26.Kb1 Nf6 27.Qb3 Rc8 28.Rc1 Rc6 29.Rhe1 Qg6+ 30.Rc2 Ne4 31.Nf4 Qf5 32.Qxd5 Qxd5 33.Nxd5

9. (-3.26): 20.Rc1 Bd7 21.Qb3 g4 22.hxg4 hxg4 23.Rxh8 Qxh8 24.Ne5 Ke7 25.Nxc3 Bxd4 26.Nxg4 Qh5 27.Be2 Qh1+ 28.Bf1 Ng6 29.Kd2 Rf8 30.Ne2 Bg7 31.Qb4+ Ke8

10. (-3.37): 20.a3 c6 21.Nd6+ Kd7 22.Qb3 Bxd4 23.Ne4 Qf5 24.Nxc3 Bc5 25.a4 Ng6 26.0-0-0 Ne5 27.Bd3 Nxd3+ 28.Rxd3 Kc7 29.Qc2 Bd7 30.Nb5+ Kb6 31.Nbd4

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 <bxc3> 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <18...bxc3>

Prof. Robert I Reynolds - Gert Jan Timmerman, WC15 Final ICCF 1997

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Analysis by Fruit 2.3.1 (22-ply):

1. (-1.62): 19.Kd1 Rg8 20.exf6 Qxf6 21.Qxc3 Kd8 22.a4 Ba5 23.Qe3 Qe7 24.Be2 c6 25.Nc3 Nd7 26.g4 hxg4 27.hxg4 e5 28.dxe5 Bb6 29.Nd4 Bxd4 30.Qxd4 Nxe5 31.Qb6+ Qc7 32.Qxc7+ Kxc7 33.Rh7+ Bd7

2. (-1.69): 19.0-0-0 Bd7 20.Nxc3 f5 21.Kb1 Ng6 22.h4 gxh4 23.gxh4 Qe7 24.Bb5 c6 25.Bd3 Qb4+ 26.Ka1 Ra3 27.Ne2 c5 28.Rb1 Qa5 29.dxc5 Qxc5 30.Rhc1 Qf2 31.Nc3 Qxc2 32.Rxc2

3. (-1.69): 19.Bd3 f5 20.Kd1 Ng6 21.Qxc3 Bd7 22.a4 Ba5 23.Qc1 h4 24.Nxg5 hxg3 25.Qe3 Rh5 26.Nf3 Kf7 27.Rf1 Bb6 28.Nc3 Kg7 29.Rc1 Bxa4+ 30.Nxa4 Rxa4

4. (-2.01): 19.a4 Rg8 20.g4 hxg4 21.hxg4 fxe5 22.Nxe5 Qf6 23.0-0-0 Bxd4 24.Nxc7+ Kd8 25.Rxd4 Qxe5 26.Nb5 Bd7 27.Qe2 Ng6 28.Qxe5 Nxe5 29.Nxc3 Rf8 30.Be2 Kc7 31.Rh5 Rf2 32.Rxg5

5. (-2.05): 19.exf6 Qxf6 20.0-0-0 g4 21.hxg4 hxg4 22.Rxh8 Qxh8 23.Ne5 Qg7 24.Qxc3 Kd8 25.Bd3 Nd7 26.Ng6 Rxa2 27.Nf4 Nf8 28.Kb1 Rf2 29.Re1 c6 30.Qb4 Bd7 31.Qd6 Kc8

6. (-2.09): 19.Be2 Bd7 20.Kd1 Bxb5 21.Bxb5+ c6 22.Bd3 Qe7 23.Qxc3 fxe5 24.dxe5 Nd7 25.Qd2 0-0 26.Rb1 Ra3 27.Rb3 Rxb3 28.axb3 Nc5 29.Bg6 Ra8 30.Qc3 Ne4 31.Bxe4 dxe4

7. (-2.14): 19.Rb1 fxe5 20.dxe5 Ba5 21.Kd1 Qe7 22.Nxc3 Bxc3 23.Qxc3 Rxa2 24.Be2 c6 25.Ra1 Rxa1+ 26.Qxa1 Nd7 27.Qc1 c5 28.Qe3 0-0 29.g4 h4 30.Rf1 d4 31.Qe4 Kg7 32.Bc4

8. (-2.20): 19.Rd1 Bd7 20.Nxc3 fxe5 21.Nxe5 Qf6 22.Nb5 Kd8 23.Rd2 Be8 24.Qb2 Qe7 25.Nc3 Nd7 26.Nf3 Qd6 27.Bd3 Qxg3+ 28.Kd1 Rf8 29.Re1 Rxf3 30.gxf3 Qxf3+ 31.Kc1 Qxh3 32.Qb4

9. (-2.31): 19.Rc1 Bd7 20.Kd1 Rg8 21.Qxc3 g4 22.hxg4 hxg4 23.Nd2 Bxb5 24.Bxb5+ c6 25.Bd3 fxe5 26.dxe5 Qg5 27.Qb2 Ba5 28.Rc2 Rg7 29.Qa3 Qxe5 30.Nb3 b6 31.Nxa5 Rxa5

10. (-2.42): 19.Qd3 fxe5 20.Nxe5 Qf6 21.Nxc3 Nd7 22.Nf3 c5 23.0-0-0 0-0 24.Qd2 Nb8 25.Bb5 Nc6 26.Bxc6 bxc6 27.Rhf1 Ba6 28.Rfe1 cxd4 29.Nxd4 Bxd4 30.Qxd4 Qe7 31.Rd2 Rab8 32.Rb2

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 <axb4> 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <17...axb4>

Prof. Robert I Reynolds - Gert Jan Timmerman, WC15 Final ICCF 1997

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Analysis by Fruit 2.3.1 (21-ply):

1. (-1.72): 18.Nb5 bxc3 19.Bd3 f5 20.Kf1 Bd7 21.Qxc3 Bxb5 22.Bxb5+ c6 23.Bd3 Nd7 24.a4 c5 25.Bb5 cxd4 26.Qb4 Ba5 27.Qd6 Qe7 28.Nxg5 Qxd6 29.exd6

2. (-2.39): 18.Nb1 bxc3 19.Nxc3 fxe5 20.dxe5 Qe7 21.Rb1 Kd8 22.Be2 Nd7 23.Qg6 Ra3 24.Rb3 Rxb3 25.axb3 Ba5 26.Kd2 d4 27.Nxd4 Nxe5 28.Qe4 Qc5 29.Qe3 Kd7 30.Rf1

3. (-3.59): 18.Rb1 Rxa3 19.Rxb4 f5 20.Qb2 Ra8 21.Bb5+ Bd7 22.h4 gxh4 23.gxh4 Ng6 24.Ng5 Qe7 25.g3 f4 26.gxf4 Bxb5 27.Rxb5 0-0 28.Qc2 Nxf4 29.0-0 Qd7 30.a4

4. (-3.63): 18.Nc4 dxc4 19.cxb4 fxe5 20.dxe5 Bd7 21.Bxc4 Qe7 22.Qc3 Ba4 23.Bb3 Bxb3 24.Qxb3 0-0-0 25.Rc1 Kb8 26.a4 Ng6 27.a5 Bd4 28.Rc4 Bxe5 29.0-0 Rhf8

5. (-3.84): 18.Qb3 Rxa3 19.Qxb4 Qe7 20.Qb2 f5 21.Bb5+ Bd7 22.Bxd7+ Nxd7 23.0-0 g4 24.Nh4 Rg8 25.Kh2 Kd8 26.Rf4 Kc8 27.Rb1 Kb8 28.Qd2 c6 29.Rff1 gxh3 30.gxh3

6. (-3.84): 18.Qb2 Rxa3 19.Qxb4 Qe7 20.Qb2 f5 21.Bb5+ Bd7 22.Bxd7+ Nxd7 23.0-0 g4 24.Nh4 Rg8 25.Kh2 Kd8 26.Rf4 Kc8 27.Rb1 Kb8 28.Rff1 c6 29.Qd2 gxh3 30.gxh3

7. (-3.84): 18.Qb1 Rxa3 19.Qxb4 Qe7 20.Qb2 f5 21.Bb5+ Bd7 22.Bxd7+ Nxd7 23.0-0 g4 24.Nh4 Rg8 25.Kh2 Kd8 26.Rf4 Kc8 27.Rb1 Kb8 28.Rff1 c6 29.Qd2 gxh3 30.gxh3

8. (-3.97): 18.0-0-0 Rxa3 19.cxb4 fxe5 20.Nxe5 Qd6 21.Qb2 Rxg3 22.Rd3 Rxd3 23.Bxd3 Nd7 24.Ng6 Rh7 25.Re1 Rf7 26.Kb1 c6 27.h4 Kd8 28.hxg5 Qg3 29.Rd1 Qxg5

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 <a5> 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <16...a5>

Prof. Robert I Reynolds - Gert Jan Timmerman, WC15 Final ICCF 1997

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Analysis by Fruit 2.3.1 (22-ply):

1. (-0.75): 17.exd5 exd5 18.Qa4+ Bd7 19.b5 Qe7+ 20.Kf2 0-0-0 21.Nc2 h4 22.gxh4 gxh4 23.Ne3 Qd6 24.Qb3 Rh5 25.Bd3 Qg3+ 26.Kg1 Rg5 27.Ng4 Rg7 28.Rf1 Ng6 29.Bxg6 Rxg6 30.Re1 Bxg4 31.hxg4 Rxg4

2. (-0.85): 17.bxa5 Bxa5 18.exd5 exd5 19.Kf2 c6 20.Qb3 Qd6 21.Nc2 Kf7 22.c4 Ne6 23.cxd5 cxd5 24.Ne3 Nc7 25.Kg1 Kg7 26.Bb5 Bb4 27.Rb1 Nxb5 28.Qxb4 Bd7 29.Qxd6 Nxd6 30.Nxd5 Rxa2

3. (-1.03): 17.Qa4+ Bd7 18.b5 dxe4 19.Nd2 f5 20.Nac4 Ng6 21.Be2 h4 22.Qd1 0-0 23.0-0 hxg3 24.Nxb6 cxb6 25.Qe1 Nf4 26.Bc4 Qc7 27.Qe3 Kg7 28.Rae1 Rh8 29.Qxg3

4. (-1.66): 17.b5 Qd6 18.Nb1 Qxg3+ 19.Kd1 Rg8 20.exd5 exd5 21.Bd3 Be6 22.Qe2 0-0-0 23.Nbd2 Re8 24.Nf1 Qd6 25.Ne3 Ng6 26.Bxg6 Rxg6 27.Qd3 Rg7 28.Nf5 Bxf5 29.Qxf5+ Kb8 30.Re1

5. (-1.71): 17.e5 axb4 18.Nb5 bxc3 19.Bd3 f5 20.Kf1 Bd7 21.Qxc3 Bxb5 22.Bxb5+ c6 23.Bd3 Nd7 24.Qb2 c5 25.Kg1 cxd4 26.Kh2 Rh6 27.Bb5 h4 28.Qb4 hxg3+ 29.Kxg3

6. (-1.73): 17.Qb3 axb4 18.Qxb4 dxe4 19.Nd2 Ba5 20.Qb3 Qd6 21.0-0-0 Qxg3 22.Nac4 f5 23.Nxa5 Rxa5 24.Nc4 Rd5 25.h4 gxh4 26.Ne5 Nd7 27.Bc4 Nxe5 28.Bxd5 Nd3+ 29.Rxd3 exd3 30.Bxb7 Bxb7 31.Qxb7

7. (-1.73): 17.Qb2 dxe4 18.Nd2 axb4 19.Qxb4 Ba5 20.Qb3 Qd6 21.0-0-0 Qxg3 22.Nac4 f5 23.Nxa5 Rxa5 24.Nc4 Rd5 25.h4 gxh4 26.Ne5 Nd7 27.Bc4 Nxe5 28.Bxd5 Nd3+ 29.Rxd3 exd3 30.Bxb7 Bxb7 31.Qxb7

8. (-1.83): 17.Nb1 axb4 18.exd5 exd5 19.cxb4 Qe7+ 20.Kd1 g4 21.hxg4 Bxg4 22.Nc3 Qxb4 23.Qe2+ Ne6 24.Nxd5 Qa4+ 25.Kc1 Bxd4 26.Qb5+ Kf7 27.Qxa4 Rxa4 28.Rb1 Rd8 29.Nxd4 Rxd5 30.Nf3 Nc5 31.Rb2 Re4

9. (-1.85): 17.Qb1 axb4 18.Qxb4 dxe4 19.Nd2 Ba5 20.Qb3 Qd6 21.0-0-0 Qxg3 22.Nac4 f5 23.Nxa5 Rxa5 24.Nc4 Ra6 25.Kb1 Nd7 26.h4 g4 27.Qb4 Qf2 28.Na5 Ra8 29.Bc4

10. (-1.86): 17.Nb5 dxe4 18.Nd2 c6 19.Nxe4 cxb5 20.Bxb5+ Kf7 21.0-0 f5 22.bxa5 Rxa5 23.Rab1 Kg7 24.Nd2 e5 25.Nc4 exd4 26.Kh1 Ra8 27.Nxb6 Qxb6 28.Bd7 Qa7 29.Bxc8 Rxc8 30.Rxf5

Engine wise Prof Robert I Reynolds plays very suboptimal.

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 <Nf8> 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <15...Nf8>

Prof. Robert I Reynolds - Gert Jan Timmerman, WC15 Final ICCF 1997

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Analysis by Fruit 2.3.1 (21-ply):

1. (-0.52): 16.0-0-0 a5 17.b5 Qd6 18.Kb2 c5 19.c4 cxd4 20.exd4 Qb4+ 21.Qb3 Qxb3+ 22.axb3 Bc7 23.b6 Bxg3 24.Nb5 Bd7 25.cxd5 Ke7 26.dxe6 Nxe6 27.Bc4 Nf4 28.h4 Nxg2 29.hxg5

2. (-0.56): 16.Qf2 Qe7 17.Nc2 Bd7 18.Be2 0-0-0 19.0-0 Ng6 20.Rac1 f5 21.c4 Kb8 22.cxd5 exd5 23.Bd3 Rh7 24.Nd2 Rf8 25.Kh1 a5 26.Qf3 axb4 27.Qxd5

3. (-0.72): 16.Kf2 Qe7 17.Nb1 c6 18.c4 Qxb4 19.a3 Qe7 20.Bd3 Bc7 21.Nc3 Qd6 22.Ne2 Nd7 23.Qb3 dxc4 24.Qxc4 0-0 25.Qc2 Rd8 26.Bg6 Qd5 27.Bxh5

4. (-0.73): 16.Bd3 a5 17.Qa4+ c6 18.b5 c5 19.h4 cxd4 20.cxd4 e5 21.hxg5 e4 22.Bxe4 dxe4 23.Nd2 f5 24.Nac4 Be6 25.Rc1 Ng6 26.Kf2 h4 27.gxh4 Rxh4 28.Rxh4 Nxh4 29.Nxb6 Qxb6

5. (-0.77): 16.Nb1 Qd6 17.Qf2 c6 18.Bd3 Bc7 19.Nbd2 Qxg3 20.c4 Rg8 21.Rc1 Bd7 22.Ke2 Qxf2+ 23.Kxf2 Kf7 24.cxd5 exd5 25.Nb3 Ne6 26.Na5 Rab8 27.g4 Bxa5 28.bxa5

6. (-0.80): 16.c4 Qd6 17.Kf2 Qxb4 18.Qb3 Ba5 19.Nc2 Qc3 20.Bd3 dxc4 21.Bxc4 Kf7 22.Qxc3 Bxc3 23.Rab1 Ng6 24.Rb3 Ba5 25.e4 Rd8 26.Ne3 b5 27.Bd3 Bb7

7. (-0.86): 16.Rb1 c6 17.e4 Bc7 18.e5 Rg8 19.Qf2 Nd7 20.exf6 Qxf6 21.Bd3 g4 22.Nd2 gxh3 23.Rxh3 Qe7 24.Kf1 Nf6 25.Re1 a5 26.Nc2 e5 27.Bf5 Bxf5 28.Qxf5 axb4 29.Nxb4

8. (-0.90): 16.Rc1 a5 17.b5 Qd6 18.Qb2 Rg8 19.Kf2 g4 20.hxg4 Rxg4 21.Ke1 Re4 22.Kd1 Qxg3 23.Rh3 Qg7 24.Nd2 Rg4 25.c4 h4 26.Ke1 Bd7 27.cxd5 exd5

9. (-0.92): 16.e4 a5 17.exd5 exd5 18.Qa4+ Bd7 19.b5 Qe7+ 20.Kf2 0-0-0 21.Nc2 h4 22.gxh4 gxh4 23.Ne3 Qd6 24.Re1 Rg8 25.Ke2 Re8 26.Kd1 Ng6 27.Bd3 Kb8 28.Kc1 Nf4

10. (-0.95): 16.Qb2 Qd6 17.c4 Qxg3+ 18.Qf2 Qxf2+ 19.Kxf2 c6 20.Nb1 Ng6 21.Bd3 Kf7 22.Nc3 Bc7 23.Rac1 Ne7 24.g3 dxc4 25.Bxc4 Nf5 26.Ne4 h4 27.g4 Ng3 28.Nxg3 hxg3+ 29.Kg2

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 <Nxg3> 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <14...Nxg3>

Prof. Robert I Reynolds - Gert Jan Timmerman, Blitz:10080'+259200"

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Analysis by Fruit 2.3.1 (23-ply):

1. (-0.46): 15.Qg6+ Kf8 16.fxg3 Qe8 17.Qxe8+ Kxe8 18.c4 c6 19.Kf2 Kf7 20.Bd3 Bc7 21.h4 g4 22.Nd2 b5 23.cxd5 cxd5 24.Nb3 Nb6 25.Rac1 Nc4 26.Rc3 Bd7 27.Nc5 Bc6 28.Nxc4 dxc4

2. (-0.81): 15.fxg3 Qe7 16.0-0-0 a5 17.Qa4 c6 18.Bd3 Bc7 19.g4 b5 20.Qb3 axb4 21.cxb4 Bd6 22.Nc2 Qg7 23.gxh5 Rxh5 24.Kb1 Kf8 25.Ka1 Bb7 26.Rdf1 Kg8 27.e4 Ra4 28.exd5 exd5

3. (-3.03): 15.Nxg5 fxg5 16.Qg6+ Kf8 17.fxg3 Qf6 18.Qd3 a5 19.Be2 Kg7 20.Nc2 axb4 21.cxb4 e5 22.a4 c6 23.g4 e4 24.Qb3 hxg4 25.Bxg4 Rf8 26.0-0-0 Bc7 27.Rhf1 Qxf1 28.Rxf1 Rxf1+ 29.Kb2 Rf2

4. (-3.60): 15.Rg1 Nxf1 16.Qg6+ Kf8 17.Rxf1 Qe7 18.Nc2 Nb8 19.e4 Qg7 20.Qxg7+ Kxg7 21.h4 dxe4 22.Nd2 gxh4 23.Nxe4 Nc6 24.Ne3 Bd7 25.Nc4 Ba7 26.0-0-0 b5 27.Ne3 Bb6 28.Rh1

5. -(-3.62): 15.Rh2 Nxf1 16.Kxf1 Qe7 17.e4 dxe4 18.Qxe4 a5 19.Nc4 axb4 20.cxb4 c6 21.a3 Bc7 22.Rh1 Nb6 23.Nxb6 Bxb6 24.Ke2 Rg8 25.g4 Qf7 26.Rhc1 Bd7 27.Kf1 hxg4 28.hxg4

6. (-3.92): 15.Ne5 fxe5 16.Qg6+ Kf8 17.fxg3 Qf6 18.Qd3 Kg7 19.Be2 c6 20.g4 a5 21.b5 hxg4 22.Bxg4 Qe7 23.Nc2 Nf6 24.Be2 c5 25.dxe5 Nd7 26.0-0 Nxe5 27.Qd2 Bd7

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 <h5> 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <13...h5>

Prof. Robert I Reynolds - Gert Jan Timmerman, Blitz:10080'+259200"

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Analysis by Fruit 2.3.1 (23-ply):

1. (-0.47): 14.h3 Qe7 15.Nc4 Nxg3 16.Nxb6 Nxb6 17.fxg3 Bd7 18.Bd3 e5 19.Bg6+ Kd8 20.0-0 a5 21.bxa5 Rxa5 22.Nd2 Ra3 23.e4 Kc8 24.Rab1 Kb8 25.Rf2 Ra4 26.Nf3 dxe4 27.Bxe4

2. (-0.49): 14.h4 g4 15.Nd2 Nxg3 16.Qg6+ Kf8 17.fxg3 Qe7 18.Nc2 c6 19.Kf2 Qg7 20.Qxg7+ Kxg7 21.Be2 f5 22.Ne1 a5 23.Nd3 axb4 24.cxb4 Ra3 25.Nb3 Nf6 26.Nbc5 Ne4+ 27.Nxe4 fxe4 28.Nf4 Rf8

3. (-0.85): 14.Bd3 h4 15.Bxh4 gxh4 16.Bxe4 dxe4 17.Qxe4 Nf8 18.Nc4 Ba7 19.Nfd2 h3 20.Rg1 hxg2 21.Qxg2 Rh7 22.Ne4 f5 23.Ng5 Rg7 24.0-0-0 Qd5 25.Qxd5 exd5 26.Ne5 Bd7 27.Ngf3 Ne6 28.Rxg7 Nxg7

4. (-1.45): 14.0-0-0 a5 15.bxa5 Rxa5 16.Nc4 h4 17.Nxa5 Bxa5 18.Bb5 hxg3 19.hxg3 Rg8 20.c4 Qe7 21.Rd3 c6 22.cxd5 exd5 23.Rb3 g4 24.Nh4 Kd8 25.Nf5 Qe6 26.f3 Qxf5 27.fxe4 Qxe4 28.Qxe4 dxe4

5. (-1.56): 14.Nc4 h4 15.Nxb6 Nxb6 16.Be5 fxe5 17.Nxe5 h3 18.g3 Qf6 19.Bd3 Nd6 20.f4 Bd7 21.a4 0-0-0 22.0-0 Kb8 23.Qb3 Nbc8 24.b5 a5 25.Kh1 Ne7 26.fxg5 Qxg5

6. (-1.84): 14.c4 h4 15.Bxh4 gxh4 16.c5 Ba7 17.Bd3 f5 18.c6 Ndf6 19.cxb7 Bxb7 20.Ne5 Rg8 21.0-0 Bb6 22.Rac1 h3 23.Bxe4 Nxe4 24.g3 a5 25.Qe2 Nf6 26.Qb5+ Nd7 27.Nc6 Bxc6 28.Qxc6

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 <f6> 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <12...f6>

1: Prof. Robert I Reynolds - Gert Jan Timmerman, Blitz:10080'+259200"

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Analysis by Fruit 2.3.1 (21-ply):

1. (-0.41): 13.Bg3 h5 14.h3 Qe7 15.Nc4 Nxg3 16.Nxb6 Nxb6 17.fxg3 Bd7 18.Bd3 0-0-0 19.0-0 e5 20.e4 dxe4 21.Bxe4 Bb5 22.Rf2 Kb8 23.Re1 Nc4 24.dxe5 fxe5

2. (-1.35): 13.Bd3 fxe5 14.Bxe4 dxe4 15.Qxe4 exd4 16.Qxe6+ Qe7 17.Qxe7+ Kxe7 18.exd4 g4 19.Nd2 Nf6 20.0-0 Be6 21.Nac4 Nd5 22.Nxb6 cxb6 23.Rac1 Rac8 24.Ne4 Bf5 25.Rfe1 Kd7 26.Ng3 Bd3

3. (-1.67): 13.Nc4 fxe5 14.Nfxe5 Nxe5 15.Nxe5 Qf6 16.Bd3 Nd6 17.0-0 Bd7 18.c4 dxc4 19.Bxc4 0-0-0 20.Rac1 Rhg8 21.f4 Qe7 22.Qb3 gxf4 23.Rxf4 Nxc4 24.Nxc4 Ba7 25.Ne5 Bb5 26.Kh1

4. (-2.28): 13.Be2 fxe5 14.Nxe5 Nxe5 15.dxe5 g4 16.Nc4 Rf8 17.Nxb6 cxb6 18.0-0 Qg5 19.Bd3 Qxe5 20.Bxe4 dxe4 21.Qd1 h5 22.Qd4 Qxd4 23.cxd4 Bd7 24.Rfc1 a5 25.Rc7 axb4 26.Rxb7

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 <g5> 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <11...g5>

1: Prof. Robert I Reynolds - Gert Jan Timmerman

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Analysis by Fruit 2.3.1 (23-ply):

1. (-0.31): 12.Bg3 h5 13.Bd3 h4 14.Be5 f6 15.Bxe4 dxe4 16.Qxe4 fxe5 17.Qg6+ Kf8 18.Nc4 Qf6 19.Ncxe5 Ke7 20.0-0 h3 21.g3 a5 22.Qe4 Nxe5 23.Nxe5 Ke8 24.Nc4 Qf5 25.Qxf5 exf5 26.Nxb6 cxb6

2. (-0.45): 12.Be5 f6 13.Bg3 h5 14.h3 Qe7 15.Bh2 a5 16.Nc4 axb4 17.Nxb6 Nxb6 18.c4 Na4 19.cxd5 Nac3 20.dxe6 Bxe6 21.Qb2 Rxa2 22.Rxa2 Bxa2 23.Bd3 Be6 24.0-0 0-0 25.Ra1

3. (-1.81): 12.Bd3 gxf4 13.Bxe4 dxe4 14.Qxe4 c6 15.0-0 Bc7 16.exf4 Nf6 17.Qd3 Bxf4 18.g3 Rg8 19.Nc4 Nd5 20.Nfe5 Rg7 21.Rfe1 Kf8 22.Qc2 Bg5 23.Rad1 Bd7 24.Nxd7+ Qxd7 25.Ne5 Qd6

4. (-2.49): 12.Nc4 gxf4 13.exf4 Rg8 14.Nxb6 Nxb6 15.g3 a5 16.b5 Qe7 17.Bd3 Bd7 18.0-0 Nd6 19.a4 0-0-0 20.Rfe1 Qf6 21.Kh1 Kb8 22.Ne5 h5 23.Qb3 h4 24.Ra2 hxg3 25.fxg3

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 <Ne4> 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <10...Ne4>

1: Prof. Robert I Reynolds - Gert Jan Timmerman, 1996

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Analysis by Fruit 2.3.1 (23-ply):

1. (-0.15): 11.c4 g5 12.Be5 f6 13.Bg3 a5 14.Qa4 h5 15.c5 h4 16.Bxh4 gxh4 17.cxb6 c6 18.b5 Nxb6 19.Qb3 h3 20.g3 c5 21.dxc5 Nxc5 22.Qc2 Qe7 23.Bd3 Nxd3+ 24.Qxd3 Qb4+ 25.Ke2

2. (-0.22): 11.Nd2 g5 12.Bg3 Nxg3 13.hxg3 a5 14.Qa4 c6 15.Bd3 Bc7 16.b5 c5 17.b6 Bxb6 18.Nb5 Qe7 19.Nf3 h5 20.Rb1 g4 21.Nd2 h4 22.gxh4 cxd4 23.Nxd4 Rxh4

3. (-0.31): 11.Bd3 a5 12.Bxe4 dxe4 13.Nd2 e5 14.Bxe5 Nxe5 15.dxe5 Qg5 16.g3 Qxe5 17.Qc2 axb4 18.Nac4 Qxc3 19.Qxe4+ Kf8 20.Nxb6 Qxa1+ 21.Ke2 Qxa2 22.Nxa8 Qxa8 23.Qxb4+ Kg8 24.Rc1 Qa6+ 25.Ke1 c6 26.Ne4

4. (-0.40): 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Qe7 15.Nc4 Nxg3 16.Nxb6 Nxb6 17.fxg3 Bd7 18.Bd3 0-0-0 19.a4 e5 20.a5 e4 21.axb6 exf3 22.e4 dxe4 23.Bxe4

5. (-0.40): 11.Qb3 a5 12.Rc1 g5 13.Be5 Rg8 14.Qa4 f6 15.Bg3 h5 16.h3 Nxg3 17.fxg3 c6 18.g4 hxg4 19.hxg4 Bc7 20.Bd3 b5 21.Qb3 Bg3+ 22.Ke2 Bd6 23.Kf2 axb4 24.cxb4

6. (-0.46): 11.Rc1 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Qe7 16.Bd3 e5 17.Bg6+ Kd8 18.Qb3 e4 19.Nd2 c6 20.0-0 Ne5 21.Bf5 Nd3 22.Ra1 Kc7 23.Bxc8 Raxc8

7. (-0.49): 11.Qc1 a5 12.b5 g5 13.Be5 Rg8 14.h3 Nxe5 15.Nxe5 f6 16.Nd3 Qe7 17.Be2 e5 18.0-0 Bf5 19.Rd1 0-0-0 20.Bg4 Bxg4 21.hxg4 Nd6 22.Qb2 e4 23.Nc5 Bxc5 24.dxc5

8. (-0.55): 11.Qd3 g5 12.Be5 0-0 13.Nc4 Ba7 14.Ncd2 Nxd2 15.Nxd2 Nxe5 16.dxe5 f5 17.h4 g4 18.c4 a5 19.cxd5 axb4 20.dxe6 Bxe6 21.Qxd8 Raxd8 22.Bc4 Kf7 23.Rc1 Bb6 24.Bxe6+ Kxe6 25.Nc4 Bc5

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 Bb6 9.e3 <a6> 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <9...a6>

1: Prof. Robert I Reynolds - Gert Jan Timmerman, 1996

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Analysis by Fruit 2.3.1 (20-ply):

1. (-0.32): 10.Na3 g5 11.Bg3 a5 12.Qb3 Ne4 13.Nd2 Nxg3 14.hxg3 axb4 15.cxb4 c6 16.Nc2 e5 17.a4 exd4 18.Nxd4 Qf6 19.Qc3 0-0 20.N2f3 Re8 21.Bd3 Ne5 22.Nxe5 Rxe5

2. (-0.49): 10.Qa4 Nh5 11.Bg3 0-0 12.Bd3 Qe7 13.Bh4 Ndf6 14.Na3 g5 15.Bg3 Bd7 16.Qb3 a5 17.Ne5 axb4 18.cxb4 Ba4 19.Qc3 Ne4 20.Bxe4 dxe4

3. (-2.02): 10.a4 axb5 11.a5 Ba7 12.Bxb5 Nh5 13.Be5 0-0 14.Bd3 f6 15.Bg3 Nxg3 16.hxg3 f5 17.Qb3 Qe7 18.Rd1 Qd6 19.c4 Nf6 20.cxd5 Nxd5

4. (-2.15): 10.c4 axb5 11.c5 Ba7 12.a4 Ne4 13.axb5 g5 14.Be5 Rg8 15.Bg3 h5 16.Nd2 Nxg3 17.hxg3 h4 18.gxh4 gxh4 19.Qh5 Nf6 20.Qxh4 Bd7 21.b6

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 Ba5 8.b4 <Bb6> 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <8...Bb6>

1: Prof. Robert I Reynolds - Gert Jan Timmerman, 1996

click for larger view

Analysis by Fruit 2.3.1 (23-ply):

1. (-0.21): 9.a4 a6 10.a5 axb5 11.axb6 Rxa1 12.Qxa1 Nxb6 13.e3 Bd7 14.Be2 0-0 15.Ne5 Nc4 16.Nxc4 bxc4 17.0-0 Ne4 18.f3 Nd6 19.Qb2 Qh4 20.Ra1 Nf5 21.Bxc7 Nxe3

2. (-0.33): 9.e3 a6 10.Na3 g5 11.Bg3 a5 12.Qb3 Ne4 13.Nd2 Nxg3 14.hxg3 axb4 15.cxb4 c6 16.Nc2 e5 17.a4 exd4 18.Nxd4 Qf6 19.Qb2 Ne5 20.a5 Bc7 21.Be2 0-0 22.Rc1

3. (-0.35): 9.h3 a6 10.Na3 a5 11.Qa4 e5 12.Nxe5 0-0 13.Nd3 Re8 14.e3 Nf8 15.Be2 Ng6 16.0-0 Ne4 17.Rfc1 Bf5 18.Qb3 a4 19.Qb2 Nxf4 20.Nxf4 c6 21.Re1

4. (-0.39): 9.Rc1 a6 10.Na3 a5 11.Qa4 0-0 12.e3 Nh5 13.Be5 Qe8 14.Bb5 f6 15.Bg3 Ra7 16.Qb3 c6 17.Bd3 e5 18.Bf5 axb4 19.Qxb4 Ba5 20.Qb3 Nxg3 21.hxg3

5. (-0.41): 9.h4 a6 10.Na3 Ne4 11.e3 Nxc3 12.Qc2 Ne4 13.Nc4 dxc4 14.Qxe4 Nf6 15.Qc2 Nd5 16.Be5 f6 17.Bg3 0-0 18.Qxc4 Qe7 19.Rb1 a5 20.b5 Bd7

6. (-0.50): 9.Qa4 0-0 10.e3 Nh5 11.Bg3 a6 12.Na3 Nxg3 13.hxg3 Qe7 14.Nc2 Nf6 15.Qb3 a5 16.Bd3 Ng4 17.b5 Bd7 18.Qa3 Qxa3 19.Nxa3 f5 20.c4 a4 21.cxd5 exd5

7. (-0.51): 9.Qb3 0-0 10.h4 a6 11.Na3 a5 12.e3 Ne4 13.Rc1 Qe7 14.b5 Ndf6 15.Bd3 Bc5 16.Nc2 Bd6 17.Bxd6 cxd6 18.Bxe4 Nxe4 19.c4 dxc4 20.Qxc4 d5 21.Qb3 Bd7 22.0-0

8. (-0.54): 9.Qc1 0-0 10.h3 a5 11.e3 c6 12.Nd6 axb4 13.cxb4 Bc7 14.a3 Ne4 15.Nxe4 Bxf4 16.Nc5 Bc7 17.Nxd7 Bxd7 18.Bd3 Qe7 19.0-0 f6 20.Qc2 f5 21.Ne5 Bxe5 22.dxe5

Next <7...Ba5>

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 Bb4+ 7.c3 <Ba5> 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <7...Ba5>

1: Prof. Robert I Reynolds - Gert Jan Timmerman, 1996

click for larger view

Analysis by Fruit 2.3.1 (22-ply):

1. (0.13): 8.Qa4 Bb6 9.h3 0-0 10.e3 Ne4 11.Bd3 Ndf6 12.Ne5 Bd7 13.Qc2 c5 14.0-0 a6 15.Nxd7 Qxd7 16.Bxe4 Nxe4 17.f3 Nd2 18.Qxd2 axb5 19.Rfe1 cxd4 20.exd4

2. (0.08): 8.e3 a6 9.Na3 0-0 10.Bd3 Nh5 11.Be5 f6 12.Bg3 Nxg3 13.hxg3 c5 14.Qc2 f5 15.0-0-0 c4 16.Be2 Bc7 17.Kb1 Nf6 18.Ne5 Ne4 19.Bf3 Bxe5 20.dxe5

3. (0.00): 8.h3 a6 9.Na3 Ne4 10.e3 c5 11.Nd2 Nxd2 12.Qxd2 Bc7 13.Bxc7 Qxc7 14.c4 dxc4 15.Nxc4 b5 16.Na5 cxd4 17.exd4 Bb7 18.Rc1 Qb8 19.Qc2 Bd5 20.Nc6 Bxc6 21.Qxc6

4. (0.00): 8.Qc2 0-0 9.e3 Nh5 10.Bg3 Nxg3 11.hxg3 Nf6 12.0-0-0 c6 13.Na3 Bc7 14.Bd3 Bd6 15.Kb1 Qa5 16.Qb3 Qb6 17.Qxb6 axb6 18.Ne5 Nd7 19.Nf3 Nf6

5. (-0.01): 8.Na3 Ne4 9.Qc2 c5 10.e3 g5 11.Bg3 cxd4 12.Nxd4 Qe7 13.Nab5 Nxg3 14.hxg3 a6 15.Na3 Bb6 16.Be2 Ne5 17.0-0-0 Bc5 18.Kb1 Bd7 19.e4 Bxa3 20.bxa3 6. (-0.07): 8.Rc1 0-0 9.e3 Nh5 10.Be5 Nxe5 11.dxe5 f6 12.Nh4 Qe8 13.g4 Bd7 14.Nd4 Ba4 15.Nb3 c5 16.gxh5 c4 17.Ng6 Rf7 18.Rg1 cxb3 19.axb3 Bc6 20.Bd3

7. (-0.10): 8.g3 0-0 9.Bg2 Ne4 10.0-0 c6 11.Na3 f5 12.Qb3 g5 13.Bc1 Qe7 14.Nd2 Ndf6 15.Nxe4 Nxe4 16.Nc2 Bb6 17.f3 Nd6 18.f4 Bd7 19.fxg5 hxg5

8. (-0.14): 8.h4 0-0 9.e3 c6 10.Nd6 Bc7 11.g3 a5 12.Rg1 a4 13.a3 Qe7 14.Nf5 exf5 15.Bxc7 Nc5 16.Be5 Nb3 17.Bxf6 Qxf6 18.Rb1 Be6 19.Ne5 Rfe8

9. (-0.17): 8.Rb1 a6 9.Na3 0-0 10.e3 Nh5 11.Be5 f6 12.Bg3 Nxg3 13.hxg3 c6 14.Bd3 e5 15.b4 Bc7 16.Qb3 Nb6 17.Kf1 Rf7 18.Bg6 Re7 19.Rh5 exd4 20.cxd4

10. (-0.19): 8.Bg3 a6 9.Na3 Ne4 10.e3 0-0 11.Qc2 Qe7 12.Bd3 Nxg3 13.hxg3 c5 14.0-0-0 c4 15.Be2 Bc7 16.Kb1 b5 17.Rh4 Bb7 18.Rdh1 b4 19.cxb4 Qxb4

THE INITIAL MISTAKE?

1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.Nf3 h6 5.Bf4 e6 6.Nb5 <Bb4+> 7.c3 Ba5 8.b4 Bb6 9.e3 a6 10.Na3 Ne4 11.Qc2 g5 12.Be5 f6 13.Bg3 h5 14.h3 Nxg3 15.fxg3 Nf8 16.e4 a5 17.e5 axb4 18.Nb5 bxc3 19.exf6 Qxf6 20.Bd3 g4 21.Nh4 Kd8 22.Rf1 Qg5 23.Ke2 e5 24.Qb3 Qd2#

After <6...Bb4+>

1: Prof. Robert I Reynolds - Gert Jan Timmerman, 1996

click for larger view

Analysis by Fruit 2.3.1 (25-ply):

1. (0.01): 7.c3 Ba5 8.e3 a6 9.Na3 0-0 10.Be2 Nh5 11.Be5 Nhf6 12.0-0 Nxe5 13.Nxe5 c6 14.Bd3 Bc7 15.f4 Qe7 16.Qf3 Bd7 17.Nxd7 Nxd7 18.c4 f5 19.Rac1 Bd6 20.cxd5 Bxa3 21.bxa3 exd5

2. (-0.19): 7.Nd2 Ba5 8.e3 a6 9.Na3 Qe7 10.c3 0-0 11.Qa4 Bb6 12.Be2 e5 13.Bg3 exd4 14.cxd4 Nb8 15.Nab1 Bd7 16.Qb3 Bb5 17.Nc3 Bxe2 18.Nxe2 Nc6 19.0-0 Qd7 20.Qc2 Rfe8

3. (-0.26): 7.Bd2 Bxd2+ 8.Qxd2 c5 9.dxc5 Nxc5 10.e3 Nfe4 11.Qd4 0-0 12.Nc3 Qe7 13.Bd3 Nxc3 14.Qxc3 Bd7 15.0-0 Rac8 16.Rfc1 Nxd3 17.Qxd3 a6 18.Qd2 Rc7 19.Rd1 Qd6 20.g3 b6 21.e4 Bb5 22.exd5 exd5

4. (-0.61): 7.Nc3 Ne4 8.Bd2 Nxd2 9.Qxd2 Nf6 10.a3 Ne4 11.Qe3 Bxc3+ 12.bxc3 0-0 13.g3 c6 14.Nd2 Nxd2 15.Qxd2 e5 16.dxe5 Re8 17.Qd4 Bf5 18.Bg2 Qe7 19.f4 f6 20.0-0 fxe5 21.fxe5 Qxe5

5. (-6.38): 7.Qd2 Bxd2+ 8.Nxd2 e5 9.dxe5 Nh5 10.Be3 Nxe5 11.0-0-0 Qe7 12.Nc3 Be6 13.Nf3 Ng4 14.Nxd5 Bxd5 15.Rxd5 Nhf6 16.Bc5 Qe6 17.e4 Nxd5 18.exd5 Qf5 19.Bb5+ Kd8 20.h3 Nf6 21.c4 Qf4+ 22.Kb1 Qe4+