Importance of EGTB

[Lyapko George]

Geschrieben von: / Posted by: Lyapko George at 03 February 2004 09:18:14:

Here is the deciding game for the 1st place in my Rapid League A:
[Event "Computer chess game"]
[Site "LYAPKO"]
[Date "2004.02.03"]
[Round "2"]
[White "Aristarch 4.37 (c) 2003 Stefan Zipproth"]
[Black "Ruffian 1.0.5"]
[Result "0-1"]
[TimeControl "1800"]
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d6 5. Nc3 e6 6. Be2 Nf6 7. O-O Be7
8. Be3 O-O 9. f4 e5 10. Nb3 a5 11. a4 Nb4 12. Kh1 Be6 13. Bf3 Rc8 14. Rc1
Re8 15. Re1 exf4 16. Bxf4 Rc4 17. Nd4 Bg4 18. Bxg4 Nxg4 19. Qxg4 Rxd4 20.
b3 Bf6 21. Be3 Rc4 22. bxc4 Bxc3 23. Red1 Qc7 24. Bf4 Qxc4 25. Bxd6 g6 26.
Qf3 Nc6 27. Rb1 Bb4 28. e5 Qxc2 29. Rf1 Qc4 30. Rbc1 Qe6 31. Rcd1 Rd8 32.
Rb1 Qc4 33. Qf6 Rd7 34. Rbd1 Rd8 35. h3 Re8 36. Rf4 Qe6 37. Qxe6 fxe6 38.
Bxb4 axb4 39. Rd7 b3 40. Rff7 b5 41. Rg7+ Kh8 42. Rxh7+ Kg8 43. Rdg7+ Kf8
44. Rb7 Kg8 45. Rhg7+ Kh8 46. Rgc7 Nd4 47. Rh7+ Kg8 48. Rbg7+ Kf8 49. Rd7
Kg8 50. Rxd4 Kxh7 51. axb5 Kh6 52. b6 Kg5 53. g4 Rb8 54. Rb4 b2 55. Kg2 Kh4
56. b7 g5 57. Kf3 Kxh3 58. Rxb2 Rf8+ 59. Ke3 Rb8 60. Kd4 Kxg4 61. Kc5 Kf5
62. Kd6 g4 63. Rb3 Rd8+ 64. Kc7 Rh8 65. b8=Q Rxb8 66. Rxb8 Kxe5 67. Rb4 Kf5
68. Rb1 g3 69. Rg1 Kg4 70. Kd8 e5 71. Kc7 e4 72. Re1 Kf3 73. Rf1+ Ke2 74.
Rf7 e3 75. Rg7 Kf2 76. Rf7+ Ke1 77. Rg7 e2 78. Kd8 Kf2
{White resigns} 0-1
Note that I do not have KRKPP EGTB and it seems very hard for engines to correctly evaluate such positions.
With 65.Re3! Aristarch should win the game and 70.Kd8?? is almost the only move to loose it...
Best regards,
George

[Luis Smith]

Geschrieben von: / Posted by: Luis Smith at 03 February 2004 11:07:26:
Als Antwort auf: / In reply to: Importance of EGTB geschrieben von: / posted by: Lyapko George at 03 February 2004 09:18:14:

I don't understand, Aristarch uses tablebases. Anyways I think I have an example that can top yours. First round of CCT6, but Uri also reminds us here http://talkchess.com/forums/1/message.html?346088 that other knowledge about the endgame is needed and not only tablebases by themselves.


[Event "Blitz:45'+10""]
[Site "none"]
[Date "2004.01.31"]
[Round "?"]
[White "MoveiXX"]
[Black "ban"]
[Result "1/2-1/2"]
[WhiteElo "2351"]
[BlackElo "2701"]
[PlyCount "314"]
[TimeControl "2700+10"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. Qf3 h6 8. Bxf6
Qxf6 9. Qxf6 gxf6 10. O-O-O Bd7 11. Nb3 h5 12. h4 b5 13. a3 Nc6 14. Be2 Bc8 15.
Kb1 Bd7 16. Rhg1 Be7 17. f4 Rd8 18. Rgf1 Rb8 19. Rd2 Bc8 20. a4 bxa4 21. Nxa4
Bf8 22. Nc3 Rb4 23. Rfd1 Be7 24. Rxd6 Bxd6 25. Rxd6 Nb8 26. g3 Ke7 27. Rd1 Nd7
28. Na5 Rb6 29. Rd4 Rg8 30. Rc4 Bb7 31. Rc7 Ba8 32. Na4 Rd6 33. Nc5 Rxg3 34.
Ra7 Rg8 35. Bxa6 Rb8 36. Be2 Ke8 37. Nc4 Rd4 38. c3 Nxc5 39. cxd4 Bxe4+ 40. Ka2
Nd3 41. Nd6+ Kf8 42. Bxd3 Bxd3 43. Rxf7+ Kg8 44. Rc7 Rb4 45. Ne8 Rxd4 46. Nxf6+
Kf8 47. Nxh5 Bg6 48. Rc5 Bxh5 49. Rxh5 Rxf4 50. Rh7 Kg8 51. Re7 Ra4+ 52. Kb3
Rxh4 53. Rxe6 Kf7 54. Re2 Rh8 55. Kc4 Rc8+ 56. Kd5 Rb8 57. Kd6 Kf6 58. Rf2+ Kg5
59. Kc5 Rc8+ 60. Kb5 Rb8+ 61. Ka4 Ra8+ 62. Kb4 Rb8+ 63. Kc4 Rc8+ 64. Kd3 Rd8+
65. Ke4 Rb8 66. Kd4 Kg4 67. Kc3 Rc8+ 68. Kb4 Rb8+ 69. Ka3 Ra8+ 70. Kb3 Rb8+ 71.
Kc2 Rc8+ 72. Kd2 Rb8 73. Kc1 Kg5 74. Kc2 Rc8+ 75. Kb3 Rb8+ 76. Kc3 Rc8+ 77. Kd4
Rd8+ 78. Ke5 Re8+ 79. Kd5 Rb8 80. Kd6 Rb5 81. Kc6 Rb8 82. Kc7 Rb3 83. Rh2 Kg4
84. Kd6 Rb8 85. Ke5 Kg3 86. Rc2 Rb4 87. Kd5 Rb8 88. Ke4 Rb7 89. Re2 Rb6 90. Ke3
Rb3+ 91. Kd4 Rb8 92. Kc3 Rc8+ 93. Kb3 Rb8+ 94. Kc2 Kf4 95. b3 Rc8+ 96. Kd3 Rd8+
97. Kc3 Rc8+ 98. Kd4 Rd8+ 99. Kc5 Rc8+ 100. Kd5 Rb8 101. Kc4 Rc8+ 102. Kb4 Rb8+
103. Ka3 Ra8+ 104. Kb2 Rb8 105. Re1 Kg3 106. Rf1 Kg2 107. Rf5 Kg3 108. Rf7 Kg4
109. Rf1 Kg3 110. Rf5 Rb7 111. Rf8 Kg2 112. Ka3 Ra7+ 113. Kb4 Rb7+ 114. Ka4
Ra7+ 115. Kb5 Rb7+ 116. Kc4 Rc7+ 117. Kd3 Rd7+ 118. Kc2 Rc7+ 119. Kb1 Rb7 120.
Kb2 Kg3 121. Rf6 Kh4 122. Rg6 Rb8 123. Kc3 Rc8+ 124. Kb4 Kh5 125. Rg7 Rb8+ 126.
Ka3 Ra8+ 127. Kb2 Rb8 128. Kc3 Rc8+ 129. Kd4 Rb8 130. Kc4 Rc8+ 131. Kd3 Rd8+
132. Kc2 Rc8+ 133. Kb1 Rf8 134. Rg2 Rb8 135. Kb2 Kh6 136. Kc3 Rc8+ 137. Kd4
Rd8+ 138. Kc5 Rc8+ 139. Kd6 Rd8+ 140. Kc6 Rc8+ 141. Kb7 Rc1 142. Rb2 Kg7 143.
b4 Kf6 144. b5 Ke7 145. b6 Ra1 146. Kc6 Rc1+ 147. Kd5 Rd1+ 148. Kc4 Rc1+ 149.
Kd4 Rd1+ 150. Ke5 Re1+ 151. Kf4 Rf1+ 152. Ke4 Rf8 153. Ke5 Kd7 154. Rc2 Rc8
155. Rxc8 Kxc8 156. Kd6 Kb7 157. Kc5 Kb8 {Game drawn by mutual agreement}
1/2-1/2
</tt>

I hope Uri doesn't mind me posting this game again, but maybe others can learn from Movei's mistakes.