Author: Jon Dart
Date: 19:00:45 12/01/05
A recent offline test game:
[Event "?"]
[Site "-"]
[Date "2005.11.29"]
[Round "?"]
[White "The Baron 1.7.0"]
[Black "Arasan 9.0"]
[Result "1-0"]
[ECO "B86"]
[TimeControl "900+10"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Be7 7. Be3
O-O 8. Qe2 Nc6 9. O-O-O a6 10. Bb3 Qc7 11. Rhg1 Nd7 12. g4 Nc5
13. Nf5 b5 14. Bd5 Bb7 15. g5 Rfc8 16. Qh5 b4 17. Bxe6 Nxe6 18. Nd5
Qd7 19. f4 a5 20. Nf6+ Bxf6 21. gxf6 g6 22. Nxd6 Ncd4 23. Nxc8 Rxc8
24. Bxd4 Bxe4 25. Rd2 Qa4 26. b3 Qxa2 27. Bb2 Nd4 28. Qh3 Bf5 29. Qh6
Rxc2+ 30. Rxc2 Nxb3+ 31. Kd1 Qb1+ 32. Ke2 Qxc2+ 33. Ke3 Qc5+ 34. Ke2
Qc4+ 35. Ke1 Qe4+ 36. Kf2 Qc2+ 37. Kg3 Qd3+ 38. Kh4 Qh3+ 39. Kg5
Qxh6+ 40. Kxh6 Nc5 41. Rc1 Nd3 42. Ra1 Nf2 43. h3 Bxh3 44. Rxa5 Bg2
45. Rb5 Ng4+ 46. Kg5 h5 47. f5 Be4 48. fxg6 Bxg6 49. Rxb4 Ne3 50. Bd4
Nf5 51. Bc5 Kh7 52. Rb3 Nh6 53. Rf3 Ng4 54. Bf8 Be4 55. Rc3 Nf2
56. Bg7 Bd3 57. Kxh5 Bg6+ 58. Kh4 Bd3 59. Rc1 Be4 60. Rc5 Kg6
61. Rg5+ Kh7 62. Re5 Bc6 63. Kg3 Nd3 64. Rg5 Be4 65. Bf8 Bg6 66. Rg4
Bf5 67. Rg7+ Kh8 68. Kf3 Be6 69. Rg5 Kh7 1-0 {Black resigns}
Arasan lost this one but had several chances to win. A few notes:
16. Qh5: Crafty has Rg3 as a book move. It does not like Qh5,
score is -1.33 after 8 minutes.
16 .. b4:
[D] r1r3k1/1bq1bppp/p1npp3/1pnB1NPQ/4P3/2N1B3/PPP2P1P/2KR2R1 b - -
b4 looks plausible but Crafty considers this a mistake, prefers g6 after a 8
minute search:
({13:+2.32} 16. ... b4 17. Bxc5 g6 18. Qh6 exf5 19. Bxf7+ Kxf7
20. Nd5 Qd8 21. Qxh7+ Kf8 22. Nf4 Bxg5 23. Bxd6+ Qxd6 24. Rxd6 Bxf4+ $18)
({13:-0.42} 16. ... g6 17. Nh6+ Kg7 18. Qh3 b4 19. Bxc5 dxc5
20. Bxc6 Bxc6 21. Ne2 Bb5 22. c4 Bxc4 23. Qf3 Bxg5+ 24. Rxg5 $15)
({13:+0.58} 16. ... Ne5 17. Bxc5 dxc5 18. Bxb7 Qxb7 19. Nxe7+
Qxe7 20. Rg3 Ng6 21. Rh3 Nf8 22. Rdd3 Rd8 23. Kb1 Rxd3 24. Rxd3 Rd8 $14)
({13:+0.98} 16. ... Nb4 17. Nxe7+ Qxe7 18. Bxb7 Qxb7 19. a3
Nxc2 20. Kxc2 Na4 21. Rd4 Qc6 22. Bd2 Qc5 23. Rd3 Qxf2 24. Rd1 $16)
but I have not done a deep analysis on this.
17. Bxe6:
This is the position:
[D] r1r3k1/1bq1bppp/p1npp3/2nB1NPQ/1p2P3/2N1B3/PPP2P1P/2KR2R1 w - -
Bxc5 is the "only move" here. Arasan gives this analysis at 1 hr./move:
bm Bxc5
result: Bxc5 3600 seconds. score: +2.44 1266552516 nodes. ++ corre
ct
Bxc5 g6 Qh6 Bf8 Bxd6 exf5 Bxf8 Rxf8 exf5 Ne7 fxg6 hxg6 Bxb7 Qxb7 Na4 Qc6 Rge1
Qxa4
result(2): g6 3600 seconds. score: +0.31 1514741473 nodes.
** error
g6 hxg6 Rxg6 fxg6 Qxg6 Bg5 Bxg5 Re8 Bf6 Ne5 Bxe5 dxe5 Nd6 Qxd6 Bxb7 Nxb7
result(3): Bxe6 3600 seconds. score: -0.05 1598238528 nodes.
** error
Bxe6 Nxe6 Nd5 Qd7 Rg3 b3 axb3 Bd8 Nxd6 Rcb8 Nf5 g6 Nf6+ Bxf6 Nh6+ Kh8 Rxd7
19. f4: Rg3 is better here:
[D]r1r3k1/1b1qbppp/p1npn3/3N1NPQ/1p2P3/4B3/PPP2P1P/2KR2R1 w - -
bm Rg3
result: Rg3 3600 seconds. score: +3.02 1614483454 nodes. ++ corre
ct
Rg3 b3 axb3 Qd8 e5 Qf8 exd6 Bd8 Rh3 h6 d7 Rcb8 gxh6 g6 Rg3
result(2): Rg4 3600 seconds. score: +1.55 1575215789 nodes.
** error
Rg4 b3 Nf6+ Bxf6 gxf6 g6 Qh6 Ncd4 Ne7+ Qxe7 fxe7 bxa2 Kd2 Rxc2+ Kd3 a1=Q Rxa1
Nc5+
result(3): f4 3600 seconds. score: +0.39 1293350091 nodes.
** error
f4 b3 axb3 Kh8 Qxf7 Rf8 Qh5 g6 Qh6 Bd8 Bd4+ Ncxd4 Nxd4 Be7 Nxe6
22 .. Ncd4
This is best; but b3 is also good it seems
28 .. Bh5. This is the position:
[D] 2r3k1/5p1p/5Pp1/p7/1p1nbP2/1P5Q/qBPR3P/2K3R1 b - -
Here Black apparently missed a win with Nxb3+:
bm Nxb3+
result: Nxb3+ 3600 seconds. score: +2.50 1945309808 nodes. ++ corre
ct
Nxb3+ Qxb3 Qxb3 Rd8+ Rxd8 cxb3 Rc8+ Kd2 Bf5 Ke3 Bc2 Bd4 Bxb3 Rg5 Ra8 Bb6 a4 Rb5
a3 Rxb4 a2
result(2): Bf5 3600 seconds. score: +0.17 1954659172 nodes.
** error
Bf5 Qh6 Rxc2+ Rxc2 Nxb3+ Kd1 Qb1+ Ke2 Qxc2+ Ke3 Qc5+ Ke2 Qf8 Qg7+ Qxg7 fxg7 Nc5
Ke3 a4 Rd1 Ne6 Rd7 a3 Be5 b3 Rb7
result(3): Ne6 3600 seconds. score: -4.84 1961911809 nodes.
** error
Ne6 Re1 a4 Rxe4 axb3 Rxb4 bxc2 Rxc2 Rd8 f5 Qd5 Qf1 Nc5 Kb1 Qd3 Qxd3 Nxd3 Rb5 g5
--Jon
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