Author: Kurt Utzinger
Date: 00:07:05 05/16/04
Go up one level in this thread
On May 15, 2004 at 15:21:49, Dieter Buerssner wrote:
>On May 15, 2004 at 06:11:17, Kurt Utzinger wrote:
>
>>[D]8/5pk1/p4p2/bb1R1p1p/1p3B2/1P4K1/8/8 w - - 0 55
>>Fritz8 vs The King 3.23 X (RK 2004, round 15.3)
>>Position after 54...Bb5
>>
>>Is it possible that the next move of Fritz8
>>55.Rxf5 is a mistake losing the game? It could
>>be as the big disadvantage of 55.Rxf5 is that
>>square f5 becomes free for Black's king.
>
>I really don't know, and I think this will be too difficult for engines to
>judge. Anyway, I did a little experiment. I started a game from a position much
>later in that game. It ended in draw. Perhaps White was already lost, and was
>very lucky in the end.
>
>[Event "90 Minutes/Game + 30 Seconds/Move"]
>[Site "Engine Match"]
>[Date "2004.05.08"]
>[Round "1"]
>[White "Yace 0.99.86 bb"]
>[Black "Shredder Paderborn"]
>[ECO "E55"]
>[Result "1/2-1/2"]
>
>1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5
>7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 b6 10. Rd1 cxd4 11. exd4
>Bb7 12. Bd3 Rc8 13. Bd2 Bd6 {Black last book move} 14. Nb5
>Bb8 15. Bg5 {White last book move} Qe7 16. Ne5 Rfd8 17. f4
>Nf8 18. Qf2 a6 19. Nc3 b5 20. Ne2 Ng6 21. Qg3 Ba7 22. Kh1
>Rd5 23. a4 b4 24. Qe1 Rcd8 25. Be4 Rxe5 26. dxe5 Bxe4
>27. exf6 gxf6 28. Bh6 Bd5 29. h4 Kh8 30. f5 exf5 31. h5
>{Material is about equal, but black's pawn structure is
>rather weak; on the other hand it is Black to have the
>strong bishop pair. Anyway, the following bishop sacrifice
>comes as a real surprise - Material ist etwa gleichwertig,
>aber Schwarz hat eine schwache Bauernstruktur, dafuer das
>starke Laeuferpaar. Trotz allem kommt das folgende
>Laeuferopfer recht ueberraschend} Bxg2+ {X3D Fritz:}
>(31... Qe4 32. Rxd5 Rxd5 33. hxg6 hxg6 34. Nf4 Qxe1+
>35. Rxe1 Rd8 36. Re7 Rd1+ 37. Kh2 Bg1+ 38. Kh3 Bd4 39. Kg3
>{-0.33/16}) 32. Kh2 (32. Kxg2 Qe4+ 33. Kh2 Bb8+ 34. Ng3
>Bxg3+ 35. Kxg3 Qh4+ 36. Kg2 Qg4+ 37. Kf2 Qh4+ 38. Kg2 Qg4+
>39. Kf2 Qh4+ 40. Kg2 Qg4+ {would lead to a draw - wuerde
>zum Remis fuehren}) 32... Rg8 {Again unexpected - Wiederum
>unerwartet} 33. hxg6 Rxg6 34. Bf4 {?! Not best: to prefer
>was therefore 34.Nf4 - Nicht am besten, denn 34.Sf4 war
>vorzuziehen} Rg4 {A strong rook maneouvre which gives Black
>the advantage - Ein starker Turmzug, wonach der Vorteil an
>Schwarz uebergeht} 35. Rd3 {X3D Fritz: } (35. Ng3 Bc6
>36. Kh3 Qxe1 37. Rxe1 Rxf4 38. Re7 Bb8 39. Rxf7 Be5 40. Rc1
>{-1.16/15}) 35... Qe4 {A further strong move demonstrating
>that White is rather helpless - Ein erneut starker Zug, der
>die Hilflosigkeit von Weiss unterstreicht} 36. Rad1 Bf3 {It
>looks like the game would be over for White - Es sieht so
>aus, als ob das Spiel fuer Weiss aus waere} 37. Rd4
>(37. Rxf3 Qxf3 38. Bg3 Bb8 39. Rd8+ Kg7 40. Rxb8 Re4 {-+})
>37... Rg2+ 38. Kh3 Bg4+ (38... Bxd4 39. Rxd4 (39. Nxd4
>Qxf4) 39... Bg4+ 40. Kh4 Qxe2 41. Qxe2 Bxe2 42. Rxb4 {and
>we have a similar situation as in the game - und wir haben
>eine analoge Situation wie in derPartie}) 39. Kh4 Qxe2
>40. Qxe2 Bxe2 {With the threats Bxd1, Bxd4 and Rg4 followed
>by Rxf4 - Mit den Drohungen Lxd1, Lxd4 und Tg4 gefolgt von
>Txf4} 41. Rd8+ Kg7 42. Kh3 Bxd1 43. Kxg2 Bxa4 44. Kg3 Bb5
>45. b3 h5 {It is more than doubtful that Black can win this
>position - Es ist zweifelhaft, ob man diese Stellung mit
>Schwarz gewinnenkann} 46. Rd5 Kg6 47. Rd8 Bb6 48. Rh8 Be2
>49. Rg8+ Kh7 50. Rb8 Bc5 51. Rd8 Kg7 52. Rd5 Bb6 53. Rd6
>Ba5 54. Rd5 Bb5 55. Rxf5 {?! There was no need to take this
>pawn as this only allows Black to find a free square for
>its king - Es war nicht notwendig, diesen Bauern zu
>schlagen, denn nun erhaelt der schwarze Koenig ein gutes,
>freies Feld} Kg6 56. Rd5 Bb6 57. Rd1 Be2 58. Rd2 Bf1
>59. Rd6 Bc5 60. Rd5 Bf8 61. Rd8 Bg7 62. Bd2 Bb5 63. Bxb4
>Bh6 64. Bd6 Bg5 65. Rh8 Bc6 66. b4 Bd2 67. Kf2 Be4 68. Rb8
>Bg5 69. Ke2 Bc6 70. Rc8 Bb5+ 71. Kf3 h4 72. Bf4 Ba4 73. Bd6
>Bb3 74. Rc5 Bd1+ 75. Kg2 Be2 76. Kf2 Bb5 77. Rc8 f5 78. Kf3
>f6 79. Rc3 Bh6 80. Rc5 Bd3 81. Kf2 Bg5 82. Rd5 Bb5 83. Rc5
>f4 84. Rc3 Kf5 85. Be7 {-1.94/18 9:01m} Ke4 {+1.98/18 7:27m
>(Kg4)} 86. Bd8 {-1.94/17 8:34m} Bd3 {+2.00/18 1s} 87. Rc7
>{-1.94/16 3:39m} Kf5 {+2.08/17 1:04m} 88. Rh7 {-1.96/16
>4:07m} Be4 {+2.06/18 1:33m} 89. Rh8 {-1.96/18 3:30m (Bb6)}
>Kg4 {+2.10/19 6:06m} 90. Rg8 {-1.97/18 0s} Bd5 {+2.11/20
>5:41m} 91. Rg7 {-1.94/18 0s} Kf5 {+2.12/19 4:00m} 92. Rh7
>{-1.95/17 57s} Be4 {+2.07/18 10:33m (f3)} 93. Bb6 {-2.01/17
>3:46m (Rh8)} Kg4 {+2.08/18 7:05m} 94. Re7 {-2.02/17 1s} Bb1
>{+2.09/17 3:27m (Bc2)} 95. Re1 {-1.99/16 2:45m} Bd3
>{+2.11/18 1:11m} 96. Rg1+ {-2.01/16 2:45m} Kf5 {+2.15/19 0s
>(Kh5)} 97. Rd1 {-2.01/16 4:39m} Bb5 {+2.15/18 1s (Be4)}
>98. Rh1 {-2.02/16 2:37m (Rd8)} Ke4 {+2.05/16 8:37m (Kg4)}
>99. Bc5 {-2.04/16 3:10m (Re1+)} f3 {+2.38/18 3:20m (Kf5)}
>100. Re1+ {-2.02/16 2:41m (Rg1)} Be2 {+2.32/16 1:14m}
>101. Rg1 {-2.13/17 1:29m} Kd3 {+2.36/16 2:55m (Kf5)}
>102. Ra1 {-2.14/16 2:41m} Kc3 {+2.39/16 1:42m (Ke4)}
>103. Be3 {-1.85/16 3:22m (Rg1)} h3 {+2.80/17 6:02m (Kxb4)}
>104. Bxg5 {-1.68/15 2:10m (Rh1)} fxg5 {+2.44/14 12s}
>105. Rh1 {-1.69/16 2:49m (Rg1)} Kxb4 {+2.13/18 7:00m}
>106. Rxh3 {-0.74/19 2s} a5 {+1.64/21 3:55m} 107. Rg3
>{0.00/19 0s} a4 {+3.30/21 2:49m} 108. Rxg5 {0.00/19 1:02m
>(Rg4+)} a3 {0.00/23 11:16m (Kc4)} 109. Rg7 {0.00/19 2:40m
>(Rg8)} Kc3 {0.00/24 2:13m} 110. Rc7+ {0.00/20 1:02m} Kb3
>{0.00/22 0s (Kb2)} 111. Rb7+ {0.00/21 3:43m} Kc3 {0.00/27
>5s} 112. Ra7 {0.00/22 3:30m (Rc7+)} Kb2 {0.00/27 4:18m
>(Kb3)} 113. Rb7+ {0.00/22 2:28m} Kc3 {0.00/27 9s (Ka1)}
>114. Rc7+ {0.00/20 3:25m} Kb2 {0.00/27 39s} 115. Rb7+
>{0.00/21 2:28m} Kc3 {0.00/27 35s (Kc1)} 1/2-1/2
>
>The time control actually was game in 212 minutes + 30 s per move (the GUI gave
>84 times the 30 s from the start).
>
>Regards,
>Dieter
Hi Dieter
You have done in interesting experiment. And after studying
this game more deeply I came to the conclusion that 55.Rxf5
makes things much easier for Black but that it can't be said
for sure that this move is losing. The critical move seems
to be 85.Kf3? instead of 85.Be7!! as played by Yace in your
experiment. 85.Be7 allows the most important rook maneouvre
Rc3-c8-g8(h8) and also Bxf6 in case white's king goes to g4.
In any case, an interesting game and many thanks for your
kindness to have brought some light in the darkness of this
end game.
[D]8/8/p2B1p2/1b3kb1/1P3p1p/2R5/5K2/8 w - - 0 85
Fritz8 vs The King 3.23 X (90m+30s)
Position before 85.Kf3? instead of 85.Be7!!
[Event "RK 2004 Ath 1.3/64 90m+30s"]
[Site "Zurich"]
[Date "2004.05.08"]
[Round "15.3"]
[White "Fritz 8"]
[Black "The King 3.23 X"]
[Result "0-1"]
[ECO "E55"]
[PlyCount "206"]
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4
Nbd7 9. Qe2 b6 10. Rd1 cxd4 11. exd4 Bb7 12. Bd3 Rc8 13. Bd2 Bd6 14. Nb5 Bb8
15. Bg5 Qe7 16. Ne5 Rfd8 17. f4 Nf8 18. Qf2 a6 19. Nc3 b5 20. Ne2 Ng6 21. Qg3
Ba7 22. Kh1 Rd5 23. a4 b4 24. Qe1 Rcd8 25. Be4 Rxe5 26. dxe5 Bxe4 27. exf6 gxf6
28. Bh6 Bd5 29. h4 Kh8 30. f5 exf5 31. h5 Bxg2+ 32. Kh2 Rg8 33. hxg6 Rxg6 34.
Bf4 Rg4 35. Rd3 Qe4 36. Rad1 Bf3 37. Rd4 Rg2+ 38. Kh3 Bg4+ 39. Kh4 Qxe2 40.
Qxe2 Bxe2 41. Rd8+ Kg7 42. Kh3 Bxd1 43. Kxg2 Bxa4 44. Kg3 Bb5 45. b3 h5 46. Rd5
Kg6 47. Rd8 Bb6 48. Rh8 Be2 49. Rg8+ Kh7 50. Rb8 Bc5 51. Rd8 Kg7 52. Rd5 Bb6
53. Rd6 Ba5 54. Rd5 Bb5 55. Rxf5 Kg6 56. Rd5 Bb6 57. Rd1 Be2 58. Rd2 Bf1 59.
Rd6 Bc5 60. Rd5 Bf8 61. Rd8 Bg7 62. Bd2 Bb5 63. Bxb4 Bh6 64. Bd6 Bg5 65. Rh8
Bc6 66. b4 Bd2 67. Kf2 Be4 68. Rb8 Bg5 69. Ke2 Bc6 70. Rc8 Bb5+ 71. Kf3 h4 72.
Bf4 Ba4 73. Bd6 Bb3 74. Rc5 Bd1+ 75. Kg2 Be2 76. Kf2 Bb5 77. Rc8 f5 78. Kf3 f6
79. Rc3 Bh6 80. Rc5 Bd3 81. Kf2 Bg5 82. Rd5 Bb5 83. Rc5 f4 84. Rc3 Kf5 85. Kf3
h3 86. Rc5+ Kg6 87. Rc2 Ba4 88. Rh2 Bc6+ 89. Kf2 Bg2 90. Rxg2 hxg2 91. Kxg2 Kf7
92. Kf3 f5 93. Be5 Ke6 94. Bc3 Bf6 95. Be1 Be5 96. Ke2 Kd5 97. Kd3 Bd6 98. Bd2
f3 99. Bc3 Bg3 100. Bd2 f4 101. Bc3 Ke6 102. Bd4 Kf5 103. Bb6 Kg4 0-1
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