Author: John Merlino
Date: 10:17:52 05/15/04
Go up one level in this thread
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.
>
>
>[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"]
>[Annotator "Utzinger,K"]
>[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 {
>Black last book move} 14. Nb5 Bb8 15. Bg5 {White last book move} 15... 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} 31... 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}
>34... 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} 55...
>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 {
>Black is steadily making progress - Schwarz macht dauernd Fortschritte} 86.
>Rc5+ Kg6 87. Rc2 Ba4 {
>And from here on Black has a won game - Von hier weg hat Schwarz Gewinnstellung
>} 88. Rh2 Bc6+ 89. Kf2 Bg2 {With the threat Bg5-h4-g3 - Mit der Drohung, das
>Laeufermanoever Lg5-h4-g3 auszufuehren} 90. Rxg2 hxg2 91. Kxg2 Kf7 92. Kf3 f5
>93. Be5 Ke6 94. Bc3 Bf6 95. Be1 (95. Bxf6 Kxf6 96. Kxf4 Ke6 97. Kf3 Ke5 98. Ke3
>Kd5 {-+}) 95... Be5 96. Ke2 Kd5 97. Kd3 Bd6 98. Bd2 f3 99. Bc3 (99. Ke3 Bf4+
>100. Kxf4 f2) 99... Bg3 100. Bd2 f4 101. Bc3 Ke6 102. Bd4 Kf5 103. Bb6 Kg4 0-1
CM_SKR on an AMD 2500+ originally thinks Black is doing very well. However, with
each successive depth, the eval moves more towards a draw. This leads me to
suspect that White has good drawing chances:
Time Depth Score Positions Moves
0:01 2/11 -2.57 249243 55.Rxf5 Kg6 56.Rd5 Bb6 57.Rd2 Bf1
58.Rd6 Bc5 59.Rd5 Bg1 60.Kf3 h4
0:01 2/11 -2.54 319087 55.Kh4 Kg6 56.Rd2 Bc6 57.Ra2 Bb6
58.Rxa6 Bf2+ 59.Bg3 Bb7 60.Bxf2
Bxa6 61.Kg3
0:02 2/11 -2.46 443842 55.Rd2 Kg6 56.Rg2 Bb6 57.Kh4+ Kh7
58.Kxh5 Bc6 59.Rd2 a5 60.Rd6 Bf3+
61.Kh4 Bc7 62.Rd3
0:05 3/12 -2.46 901912 55.Rd2 Kg6 56.Rg2 Bb6 57.Kh4+ Kh7
58.Kxh5 a5 59.Bh6 Bc6 60.Rg7+ Kh8
61.Rg3 Bf2 62.Rd3 a4 63.bxa4 Bxa4
0:05 3/12 -2.32 1065700 55.Rxf5 Kg6 56.Rd5 Bb6 57.Rd6 Bc5
58.Rd5 Be7 59.Bd6 Bxd6+ 60.Rxd6
Be2 61.Rd7
0:08 4/13 -2.24 1818818 55.Rxf5 Kg6 56.Rd5 Bb6 57.Rd6 Bc5
58.Rd5 Be7 59.Bd6 Bc6 60.Rd1 Bxd6+
61.Rxd6 Bb7 62.Rd7
0:20 5/14 -2.11 4750653 55.Rxf5 Kg6 56.Rd5 Bb6 57.Bb8 Be3
58.Bd6 f5 59.Bxb4 f4+ 60.Kh3 f3
61.Rd6+ Kg5 62.Bd2 Bf1+ 63.Kg3
0:50 6/15 -2.02 12252359 55.Rxf5 Kg6 56.Rd5 Bb6 57.Rd6 Bc7
58.Rd4 Be5 59.Rxb4 Bc3 60.Re4 Kf5
61.Re7 h4+ 62.Kf3 Bc6+ 63.Ke3 h3
64.Rxf7
2:17 7/16 -1.75 34012913 55.Rxf5 Kg6 56.Rd5 Bb6 57.Rd2 Bc5
58.Rd5 Ba7 59.Bd6 Bc6 60.Ra5 Bb7
61.Ra4 Bg1 62.Bxb4 f5 63.Bd6
5:07 8/17 -1.74 77206159 55.Rxf5 Kg6 56.Rd5 Bb6 57.Rd2 Bc5
58.Rd5 Ba7 59.Bd6 Bc6 60.Ra5 Bb7
61.Bxb4 f5 62.Bd2 Bb8+ 63.Kh4 Bd6
64.Ra4
16:11 9/18 -1.70 239260984 55.Rxf5 Kg6 56.Rd5 Bb6 57.Rd1 Kf5
58.Bd6 Ke4 59.Re1+ Kd3 60.Bxb4
Kc2 61.Be7 h4+ 62.Kf4 Bf2 63.Ra1
Kxb3 64.Bxf6 h3
45:41 10/19 -1.71 672471591 55.Rxf5 Kg6 56.Rc5 Bd8 57.Rc8 Be7
58.Rh8 Bd7 59.Rh6+ Kg7 60.Rxh5
Be6 61.Ra5 Bxb3 62.Rxa6 Bc2 63.Bd6
Bxd6+ 64.Rxd6 b3 65.Rb6 Kg6
jm
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.