Author: Phil Dixon
Date: 12:40:52 06/15/99
Go up one level in this thread
On June 15, 1999 at 14:20:43, Jon Dart wrote:
>
>I recently posted a game "talmoves" (Chess System Tal) vs
>arasanx (Arasan 5.2) from ICC. I have been looking at this
>and found a very interesting position from move 31:
>
>2r1k3/5ppQ/1n3b2/3bp3/1B6/1P1R2NP/5PPK/1q6 b - -
1...Rc1 [Fritz 5.32: 1...Qc1 2.Nh5 Rc2 3.Qg8+ Kd7 4.Ba5 Qf1 5.Nxf6+ gxf6
6.Qxf7+; .09/12
Fritz 5.32: 1...Be7 2.Bxe7 Kxe7 3.Nf5+ Kd7 4.Ne3 Ke8 5.Qh8+ Kd7 6.Qh7 0.00/12]
2.Ba5 e4 3.Qg8+ Ke7 4.Bxb6 exd3 5.Qd8+ Ke6 6.Qe8+ -0.16/12 Line
1...Rc1 [Hiarcs 7.32: 1...Be7 2.Bxe7 Kxe7 3.Nf5+ Kd7 4.Ne3 Ke8 5.Qf5 g6 6.Qxe5+
Be6 7.Qd6 Bxb3; -0.04/8
Hiarcs 7.32: 1...Rc7 2.Ba5 g6 3.Qg8+ Ke7 4.Bxb6 Qxd3 5.Bxc7 Bxb3 -0.15/8] 2.Ba3
Rc7 3.Nf5 Kd8 4.Ne3 e4 5.Rxd5+ Nxd5 6.Nxd5 Be5+ 7.f4 Qxb3 8.Qxe4 Qxa3 9.fxe5
-1.00/8 Line
>
>Here Arasan played Qc2. When I ran this through Crafty
>16.10, it likes Rc1 for a long time but eventually
>switches to Qc1, with about an even score.
>
>What happens if Black plays Rc1? This is the position:
>4k3/5ppQ/1n3b2/3bp3/1B6/1P1R2NP/5PPK/1qr5 w - -
>
>Crafty thinks the best continuation is Ba5, with the
>following amazing line:
>
> 12-> 9:47 -0.03 1. Ba5 e4 2. Qg8+ Ke7 3. Bxb6 exd3
> 4. Qd8+ Ke6 5. Qe8+ Be7 6. Bd8 Ke5
> 7. Qxe7+ Be6 8. Bc7+ Rxc7 9. Qxc7+
> Kd4 10. Nh5
>
>White temporarily gives up a rook for bishop but gets the
>material back and more due to mate threats. Crafty finds Ba5
>rather quickly, as does Genius 5.0, but Arasan has trouble
>finding it even at long time controls (I'm trying to find
>out why). Fritz 5 found 31. Rc1 Ba5 during analysis of the game,
>but it doesn't seem to see that White wins material (however I gave
>it less time than Crafty).
>
>This is the whole game:
>
>[Event "?"]
>[Site "ICC"]
>[Date "1999.06.13"]
>[Round "?"]
>[White "talmoves"]
>[Black "arasanx"]
>[Result "1-0"]
>[ECO "C91"]
>[WhiteElo "2423"]
>[BlackElo "2675"]
>[TimeControl "300+8"]
>[Annotator "Fritz 5 120s"]
>[PlyCount "226"]
>
>1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
>O-O 9. d4 Bg4 10. d5 Na5 11. Bc2 c6 12. h3 Bc8 13. dxc6 Qc7 14. Nbd2 Qxc6 15.
>Nf1 Nc4 16. Ng3 Re8 17. a4 Be6 18. Ng5 d5 19. b3 Nb6 20. axb5 axb5 21. Rxa8
>Rxa8 22. Qd3 Rc8 23. exd5 Bxd5 24. Nxh7 Qxc3 25. Nxf6+ Bxf6 26. Qh7+ Kf8 27.
>Rd1 $17 (27. Re2 $142 {and White is still in the game} 27... Qa1 28. Re1 $11)
>27... Qxc2 28. Ba3+ 28... b4 $1 {staying in the lead} 29. Bxb4+ Ke8 30. Rd3
>30... Qb1+ $15 (30... Be7 $5 $142 31. Bxe7 Rc3 32. Qh8+ Kxe7 33. Rxc3 Qxc3 34.
>Qxg7 Bxb3 35. Nf5+ 35... Kd7 $19) 31. Kh2 31... Qc2 $14 (31... Rc1 32. Ba5 e4
>33. Qg8+ Ke7 34. Bxb6 exd3 (34... Qxd3 $143 35. Qd8+ Ke6 36. Qe8+ Be7 37. Bd8
>$18) 35. Qd8+ Ke6 36. Qe8+ 36... Be7 $14) 32. Qg8+ $4 $19 {
>allows the opponent back into the game} (32. Ne4 $142 {
>this is the best bet to save the position} 32... Kd8 33. Nxf6 gxf6 34. Qxf7 $14
>) 32... Kd7 33. Qh7 Rc6 ({Inferior is} 33... Qxf2 34. Qe4 Rc5 35. Bxc5 Qxc5 36.
>Qg4+ Ke7 37. Qe2 $19) 34. Ne4 34... Kc7 $17 (34... Ke6 $5 $142 35. Re3 $19) 35.
>Nxf6 $19 (35. Bd6+ Kb7 (35... Rxd6 $6 36. Rc3+ Qxc3 37. Nxc3 $11) 36. b4 Rc4 (
>36... Qxd3 37. Nc5+ Rxc5 38. Qxd3 $17) 37. Rxd5 Nxd5 (37... Rxe4 {
>is clearly worse} 38. Rc5 Qd3 39. b5 $11) 38. Nxf6 38... Nxf6 $19) 35... gxf6
>36. Qf5 Bxb3 37. Qf3 Bc4 38. Rc3 Qe2 (38... Qg6 39. Qe3 $19) 39. Qf5 Nd5 40.
>Ba5+ Kd6 41. Rf3 Ke7 42. Qb1 Ba6 43. Qb8 43... Rc8 $15 (43... Bc8 $19 $142 {
>and Black has reached his goal}) 44. Bb4+ Nxb4 45. Qxb4+ Kd7 46. Rxf6 {
>Do you see the mate threat?} 46... Rc6 $2 $18 (46... Ke8 $5 $142 47. Qd6 Rd8
>48. Qxa6 Qxa6 49. Rxa6 49... Rd2 $18) 47. Rxf7+ Ke6 48. Re7+ Kf5 49. Qh4 Rg6
>50. Rf7+ $4 $11 {instead of simply winning the game} (50. Qh7 Qe4 51. Qf7+ Kg5
>52. g3 $18) 50... Ke6 51. Qe7+ Kd5 52. Rf5 Re6 53. Qd7+ Rd6 54. Qf7+ Kd4 55.
>Qc7 Rd5 56. Qb6+ Kc3 57. Rf3+ Bd3 58. Qc6+ Kd4 59. Qa4+ Bc4 60. Qa1+ Kc5 61.
>Qa7+ Kb5 62. Qb7+ Kc5 63. Qc7+ Kb4 64. Qb8+ Bb5 65. Qf8+ Rc5 66. Re3 Qb2 67.
>Re4+ Bc4 68. h4 Qc3 69. h5 Qd3 70. Rxe5 Bd5 71. Qb8+ Rb5 72. Qd6+ Kc4 73. Qc7+
>Rc5 74. Qa7 Qc2 75. Qa6+ Kd4 76. Qf6 Kc4 77. Re3 Rc6 78. Qf4+ Kb5 79. Re5 Rd6
>80. Qf8 Qc7 81. g3 Qc1 82. Qb8+ Kc4 83. Qc8+ Rc6 84. Qg4+ Kc5 85. Qf3 Qd2 86.
>Qf8+ Rd6 87. Qc8+ Kd4 88. Rf5 Qe1 89. g4 Qh1+ 90. Kg3 Qg1+ 91. Kh4 Qh1+ 92. Kg5
>Qe1 93. Rf4+ Kd3 94. Qf5+ Kc3 95. Rf3+ Kb4 96. Qf4+ Kc5 97. Re3 Qa5 98. Kh4 Qd2
>99. Qf8 Qd4 100. Qc8+ Bc6 101. Qc7 Qf6+ 102. Kg3 Qa1 103. f4 Qg1+ 104. Kh4 Qf2+
>105. Kg5 Rd5+ 106. Re5 Rxe5+ 107. Qxe5+ Kb6 108. h6 Qc2 109. f5 Qc1+ 110. Kg6
>Qc4 111. Qb8+ Ka6 112. g5 Qe4 113. Qd6 Kb5 1-0
>
>
>
>--Jon
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