WRONG Moves by RYBKA 2.3.2a MP (PGN, Diagrams)

[Edward German]

Exampe 1:

PGN:

[Event "Wertungspartie, 3m + 0s"]
[Site "Maschinenraum"]
[Date "2007.12.16"]
[Round "?"]
[White "Krakatoa, Rybka 2.3.2b mp"]
[Black "Wolkenlos, Rybka 2.3.2a mp 32-Bit"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2577"]
[BlackElo "2607"]
[Annotator "-0.18;-0.25"]
[PlyCount "265"]
[EventDate "2007.12.16"]
[TimeControl "180"]

{Rybka 2.3.2b mp: 17.3 ply; 204kN/s AMD Athlon(tm) 64 X2 Dual Core Processor
4600+ 2411MHz, (2 threads)} 1. h3 {0} d5 {B/0 0} 2. c3 {0} e5 {B/0 0} 3. d4 {0}
Nc6 {B/0 0} 4. dxe5 {-0.18/13 4} Nxe5 {B/0 0} 5. Nf3 {-0.15/13 5} Bd6 {
-0.25/11 4} 6. Qxd5 {-0.07/14 6} Nf6 {-0.12/14 9} 7. Qb3 {-0.04/16 15} O-O {
-0.10/14 1} 8. Nxe5 {0.00/15 12} Bxe5 {-0.03/15 7} 9. Nd2 {-0.01/16 16} Qe7 {
-0.03/13 3} 10. e3 {-0.01/15 18} c6 {-0.06/11 7} 11. a4 {-0.02/15 9} Bc7 {
-0.05/11 7} 12. Bc4 {-0.13/14 8} Qe5 {-0.13/12 7} 13. Nf3 {-0.10/14 6} Qh5 {
-0.09/13 4} 14. Qc2 {-0.06/13 3} a6 {-0.02/11 9} 15. Be2 {0.00/11 1} Rd8 {
-0.01/11 4} 16. Bd2 {0.00/11 3} Qd5 {-0.04/10 3} 17. c4 {0.00/10 1} Qe4 {
0.07/11 1} 18. O-O-O {0.04/12 0} c5 {0.00/12 5} 19. Be1 {0.00/11 1} Rxd1+ {
0.02/12 1} 20. Kxd1 {0.07/13 1} Qe7 {0.12/13 6} 21. Bd3 {0.06/13 2} Bd7 {
0.06/13 2} 22. Bc3 {0.11/14 1} g6 {0.09/13 3} 23. Kc1 {0.18/15 2} Rd8 {
0.10/13 1} 24. b3 {0.18/14 0} Bc6 {0.12/11 1} 25. Ba1 {0.18/14 6} Nd7 {
0.21/10 3} 26. Rd1 {0.24/15 1} b6 {0.19/11 1} 27. Bb2 {0.29/14 6} Bb7 {
0.22/11 2} 28. Rd2 {0.36/14 3} Bc6 {0.29/12 2} 29. Be2 {0.39/14 3} Be4 {
0.30/10 2} 30. Qd1 {0.39/14 2} Bc6 {0.39/10 1} 31. h4 {0.41/13 0} Re8 {
0.39/10 1} 32. Qc2 {0.51/13 2} Ne5 {0.43/11 0} 33. h5 {0.58/12 2} Qf6 {
0.55/12 3} 34. Rd1 {0.57/11 1} Kg7 {0.64/10 5} 35. hxg6 {0.73/9 0} hxg6 {
0.70/12 2} 36. Bc3 {0.77/14 0} Bb8 {0.73/11 2} 37. Qb2 {0.97/14 1} a5 {
0.94/13 1} 38. Nxe5 {0.97/13 0} Bxe5 {1.03/15 1} 39. Bxe5 {1.10/17 0} Rxe5 {
1.11/17 5} 40. Bf3 {1.09/20 0} Bxf3 {1.13/15 0} 41. gxf3 {1.11/20 2} Re6 {
1.12/17 0} 42. f4 {1.13/19 1} Qxb2+ {1.12/18 0} 43. Kxb2 {1.16/21 3} f5 {
1.15/20 2} 44. Kc3 {1.18/20 1} Kf6 {1.15/18 0} 45. Kd3 {1.23/19 0} Ke7 {
1.19/16 1} 46. f3 {1.23/21 0} Rd6+ {1.20/19 2} 47. Ke2 {1.23/23 0} Re6 {
1.20/19 0} 48. Rh1 {1.23/22 3} Kf6 {1.20/21 1} 49. Rh7 {1.23/23 1} Re8 {
1.20/21 0} 50. Rb7 {1.23/22 2} Re6 {1.20/22 1} 51. Rd7 {1.23/22 1} g5 {
1.20/21 0} 52. fxg5+ {1.23/22 0} Kxg5 {1.20/22 0} 53. Kd3 {1.23/23 2} Kf6 {
1.20/19 2} 54. Kd2 {1.23/23 0} Kg6 {1.20/20 2} 55. Rd5 {1.23/18 0} Kf6 {
1.20/19 1} 56. Kd3 {1.23/20 0} Rc6 {1.20/20 1} 57. Ke2 {1.23/22 0} Re6 {
1.20/20 1} 58. Kf2 {1.23/23 0} Kg6 {1.20/19 0} 59. Rd1 {1.23/22 0} Kg5 {
1.20/20 1} 60. Ke2 {1.23/23 0} Kf6 {1.20/20 0} 61. Rd5 {1.23/22 0} Kg6 {
1.20/20 2} 62. Kd3 {1.23/24 0} Kf6 {1.20/21 2} 63. Rd7 {1.23/24 0} Kg5 {
1.20/18 0} 64. Ke2 {1.23/14 0} Kf6 {1.20/18 0} 65. Rh7 {1.23/21 1} Kg5 {
1.20/18 0} 66. Rh1 {1.23/17 0} Kg6 {1.20/19 1} 67. Rg1+ {1.23/14 0} Kf6 {
1.20/20 1} 68. Rd1 {1.23/19 0} Ke7 {1.20/18 0} 69. Rh1 {1.23/19 0} Rg6 {
1.14/17 1} 70. Rh7+ {1.23/16 0} Kd8 {1.14/17 0} 71. Rb7 {1.33/12 0} Kc8 {
0.86/16 1} 72. Re7 {0.97/14 0} Rg2+ {0.78/17 0} 73. Kd3 {0.79/19 0} Rb2 {
0.81/17 1} 74. Kc3 {0.92/19 0} Re2 {0.84/17 0} 75. Re6 {0.91/18 0} Kb7 {
0.84/18 1} 76. Re5 {0.91/20 0} Kc6 {0.84/17 0} 77. Rxf5 {0.91/16 0} Rxe3+ {
0.84/17 0} 78. Kc2 {0.91/18 0} Re2+ {0.84/17 0} 79. Kd3 {0.79/23 0} Rb2 {
0.83/18 0} 80. Kc3 {0.79/23 0} Rh2 {0.83/19 0} 81. Rf6+ {0.80/13 0} Kc7 {
0.83/19 1} 82. Re6 {0.86/20 0} Rh3 {0.83/17 1} 83. Re3 {0.86/17 0} Kd6 {
0.83/16 0} 84. Kd3 {0.86/18 0} Rh4 {0.83/18 0} 85. Re1 {0.86/20 0} Kd7 {
0.83/17 0} 86. Re4 {0.86/20 0} Rh1 {0.83/18 1} 87. Re3 {0.86/21 0} Rh4 {
0.83/17 0} 88. Re5 {0.86/19 0} Kd6 {0.83/16 1} 89. Rd5+ {0.86/20 0} Ke7 {
0.83/17 1} 90. Ke3 {0.87/22 0} Rh1 {0.83/19 1} 91. Ke4 {0.87/15 0} Ke6 {
0.83/18 0} 92. Rd3 {1.12/18 0} Re1+ {0.83/16 0} 93. Re3 {1.12/21 0} Rd1 {
0.83/20 3} 94. f4 {1.24/21 0} Rh1 {0.96/17 0} 95. Rd3 {1.24/20 0} Re1+ {
1.26/17 0} 96. Kf3 {1.24/20 0} Kf5 {1.32/18 1} 97. Rd5+ {1.24/21 0} Ke6 {
1.29/19 0} 98. Rh5 {1.24/20 0} Rc1 {1.32/18 2} 99. Ke4 {1.24/21 0} Re1+ {
1.32/17 0} 100. Kd3 {1.24/21 0} Kd7 {1.32/18 1} 101. Rh7+ {1.40/13 0} Kd6 {
1.33/16 0} 102. Rh3 {1.40/19 0} Rg1 {1.33/12 0} 103. Ke4 {1.60/14 0} Rg4 {
1.33/15 0} 104. Rd3+ {1.82/17 0} Ke7 {1.97/17 0} 105. Re3 {1.96/19 0} Kd6 {
1.97/16 0} 106. Kf3 {2.01/20 0} Rh4 {2.05/17 0} 107. Kg3 {2.11/20 0} Rh5 {
2.50/16 1} 108. Kg4 {1.91/12 0} Rh7 {2.50/14 0} 109. f5 {2.75/10 0} Rh1 {
2.79/13 0} 110. f6 {2.96/12 0} Rf1 {2.91/12 0} 111. Kg5 {3.51/16 0} Rf2 {
3.46/14 0} 112. Kg6 {3.18/13 0} Rg2+ {4.52/14 0} 113. Kf7 {4.66/16 0} Rf2 {
4.52/13 0} 114. Re6+ {5.02/12 0} Kd7 {4.51/12 0} 115. Rxb6 {5.12/16 0} Rf1 {
5.03/13 0} 116. Rb5 {5.09/11 1} Rf3 {4.78/10 0} 117. Rxa5 {5.02/11 0} Rxb3 {
4.93/13 0} 118. Rxc5 {5.02/11 0} Re3 {5.53/12 1} 119. Rd5+ {8.36/12 0} Kc7 {
5.11/8 0} 120. Kg6 {8.39/6 0} Rg3+ {7.93/7 0} 121. Rg5 {7.31/4 0} Rd3 {
8.72/11 0} 122. f7 {8.71/7 0} Rd8 {8.91/10 0} 123. Kg7 {8.88/9 0} Rd7 {
9.81/10 0} 124. Kg8 {8.78/5 0} Rd8+ {9.02/6 0} 125. f8=Q {#10/7 0} Rxf8+ {
#9/6 0} 126. Kxf8 {#8/1 0} Kb7 {#7/1 0} 127. Rb5+ {#7/1 0} Kc8 {#6/1 0} 128. a5
{#6/1 0} Kc7 {#5/1 0} 129. Ke7 {#5/1 0} Kc6 {#5/1 0} 130. Ke6 {#4/1 0} Kc7 {
#4/1 0} 131. Rb6 {#3/1 0} Kc8 {#2/1 0} 132. Kd6 {#2/1 0} Kd8 {#2/1 0} 133. Rb8#
{#1/1 0} 1-0

After move 5 white:

[D]r1bqkbnr/ppp2ppp/8/3pn3/8/2P2N1P/PP2PPP1/RNBQKB1R b KQkq - 0

Analysis by Rybka 2.3.2a 32-bit :

5...Ld6 6.Dxd5 Sf6 7.Dd4 Sc6 8.De3+ Le7 9.Sa3 0-0 10.Dd3
= (-0.15) Tiefe: 12 00:00:04 429kN
5...Ld6 6.Dxd5 Sf6 7.Dd4 De7 8.Sbd2 Lf5 9.Sxe5 Lxe5 10.Da4+ Ld7 11.Db3 0-0-0
= (-0.14) Tiefe: 13 00:00:23 2174kN

5...Bd6??

Example 2 with my german comment:

Falsche Bewertung von Rybka (Eröffnung) - 2 -

In der folgenden Partie opferte Rybka schon sehr früh in der Eröffnung eine ganze Figur für nur einen unwichtigen Bauern!!

Shredder 11 bewertete dann auch richtig (+1.80) während Rybka noch beim Zug 17 noch so ahnungslos war wie ein blindes Huhn! :(

PGN:

[Event "Wertungspartie, 5m + 0s"]
[Site "Maschinenraum"]
[Date "2007.12.21"]
[Round "?"]
[White "DS11, Deep Shredder 11"]
[Black "Wolkenlos, Rybka 2.3.2a mp 32-"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "2437"]
[BlackElo "2610"]
[Annotator "0.38;0.29"]
[PlyCount "143"]
[EventDate "2007.12.21"]
[TimeControl "300"]

{Deep Shredder 11: 15.4 ply; 1.888kN/s Genuine Intel(R) CPU 2140 @
1.60GHz 3522MHz, (2 threads), Solist.ctg, oreDeviceObjects} 1. e4 {0.38/10 0}
e5 {(c5) B/0 0} 2. Nf3 {0.78/11 0} Nc6 {(Sf6) B/0 0} 3. Bc4 {0.32/10 1} d6 {
(Sf6) B/0 0} 4. O-O {0.42/14 13} Be7 {0.29/14 11} 5. d4 {0.31/15 0} Nf6 {
(exd4) 0.26/13 4} 6. d5 {0.44/14 8} Na5 {(Sb8) 0.29/16 12} 7. Be2 {0.30/15 11}
c5 {0.30/16 47} 8. a3 {0.49/17 0} c4 {(b6) 0.32/14 3} 9. b4 {0.78/16 8} cxb3 {
0.60/15 15} 10. cxb3 {0.78/17 0} Nxe4 {(b6) 0.67/15 28} 11. b4 {1.46/15 8} Bd7
{(0-0) 0.64/14 10} 12. Nfd2 {1.93/15 7} Nf6 {0.54/12 2} 13. bxa5 {1.93/16 2}
Qxa5 {0.46/13 0} 14. Qb3 {1.93/15 12} Rc8 {0.32/12 5} 15. Qxb7 {1.85/15 12}
Qxd5 {(Dc5) 0.43/15 10} 16. Qxa7 {1.90/14 7} O-O {0.28/11 4} 17. a4 {1.84/14 3}
Qe6 {0.37/11 5} 18. a5 {1.92/14 1} h6 {(Ta8) 0.44/10 7} 19. a6 {2.11/14 12}
Rfe8 {(Lc6) 0.56/10 6} 20. Qb7 {2.70/13 7} d5 {(Lc6) 0.90/12 6} 21. a7 {
2.86/14 7} Bc6 {1.26/13 3} 22. Qb2 {2.43/13 10} Ba8 {(d4) 0.98/10 5} 23. Ra6 {
2.81/13 6} Qf5 {1.25/11 3} 24. Qb5 {2.81/12 4} Rc5 {(Ted8) 1.35/11 2} 25. Qb3 {
2.66/13 13} d4 {(Tc7) 1.40/10 3} 26. Bc4 {3.15/12 5} Qh5 {(Tf8) 1.36/10 2} 27.
f3 {3.25/13 6} Rc7 {(Tec8) 1.98/12 4} 28. g4 {3.92/12 4} Qg6 {(Sxg4) 2.48/13 5}
29. Bd3 {4.18/13 9} Qg5 {2.40/15 0} 30. Nc4 {4.18/13 8} Qh4 {2.45/15 8} 31. Qb8
{4.13/14 0} Rb7 {2.21/10 3} 32. Rb6 {4.16/14 1} Rxb6 {2.66/12 5} 33. Nxb6 {
4.16/15 0} Bc6 {2.91/12 2} 34. Bf5 {4.16/13 8} Bf8 {(Lc5) 2.54/12 0} 35. Nd2 {
4.66/12 5} h5 {(d3) 3.67/11 8} 36. Qc7 {6.00/13 4} Re7 {4.70/11 0} 37. Qxc6 {
5.88/14 4} Rxa7 {3.67/10 1} 38. Nd5 {5.88/14 5} Nh7 {(Sxd5) 4.21/10 2} 39. Qe8
{6.61/10 2} g6 {(hxg4) 4.74/10 2} 40. Bd7 {7.08/11 4} Ra1 {5.14/9 0} 41. Qxe5 {
7.42/12 3} Qd8 {5.38/9 1} 42. Ne4 {7.64/12 1} Bg7 {(Ta6) 5.50/9 1} 43. Qe8+ {
7.58/12 3} Qxe8 {5.38/8 0} 44. Bxe8 {7.58/14 1} Ra5 {(d3) 5.73/9 1} 45. Bc6 {
7.66/12 6} Ra2 {5.85/9 2} 46. gxh5 {7.92/13 2} gxh5 {6.08/10 0} 47. Bd2 {
7.92/13 5} Bf8 {(d3) 6.26/10 0} 48. Rb1 {8.27/13 3} h4 {(Tc2) 6.45/8 2} 49. Rb8
{8.78/11 1} Kg7 {6.69/9 2} 50. Rb7 {9.01/13 0} Bc5 {6.75/7 0} 51. Be8 {
9.01/12 1} d3+ {7.54/8 0} 52. Kh1 {9.18/13 1} Bd4 {7.69/9 2} 53. Rxf7+ {
9.16/13 0} Kh8 {7.32/9 1} 54. h3 {9.16/13 0} Ra1+ {6.56/7 1} 55. Kg2 {9.16/12 0
} Rg1+ {7.54/8 1} 56. Kh2 {9.39/13 0} Rb1 {(Tg8) 7.54/8 0} 57. f4 {9.38/12 1}
Rb2 {(Tb8) 7.22/8 1} 58. Kg2 {10.19/13 1} Rb8 {7.87/9 0} 59. Re7 {10.20/13 1}
Rb2 {(Td8) 7.68/8 1} 60. Kf3 {10.67/11 2} Rb3 {(Tc2) 8.01/10 0} 61. Kg4 {
11.09/11 1} Rb1 {(Tb2) 8.20/7 1} 62. f5 {11.35/11 2} Rf1 {(Tg1+) 9.30/8 0} 63.
Bg6 {20.04/11 1} Nf8 {12.24/8 3} 64. Re8 {#9/13 0} Bg7 {(Tf4+) 14.43/7 0} 65.
Bc3 {#8/15 2} Rg1+ {#8/6 0} 66. Kh5 {#7/13 0} Bxc3 {#8/4 0} 67. Rxf8+ {#6/11 0}
Kg7 {#7/4 0} 68. Rf7+ {#5/9 0} Kh8 {#4/3 0} 69. Rh7+ {#4/7 0} Kg8 {#3/3 0} 70.
Nef6+ {#3/5 0} Bxf6 {#2/3 0} 71. Nxf6+ {#2/3 0} Kf8 {#1/3 0} 72. Rf7# {#1/1 0}
1-0

Stellung nach Zug 16 und eine Analyse mit Rybka 2.3.2a MP auf Core 2 Duo 2.66 GHz mit 256 MB Hash:

DS11,D - Wolkenlos,R, Wertungspartie, 5m + 0s 2007

[D]2r2rk1/Q2bbppp/3p1n2/3qp3/8/P7/3NBPPP/RNB2RK1 w - - 0 1

Analysis by Rybka 2.3.2a mp 32-bit :

17.Lf3 De6
= (0.06) Tiefe: 5 00:00:00
17.De3 Dc6
= (0.21) Tiefe: 5 00:00:00
17.De3 Dc6 18.Sc4
= (0.23) Tiefe: 6 00:00:00 5kN
17.De3 Dc6 18.Sc4 Sd5
= (0.20) Tiefe: 7 00:00:00 10kN
17.De3 Dc6 18.Sc4 Sd5 19.Dg3
= (0.18) Tiefe: 8 00:00:00 22kN
17.a4 e4 18.Ta3 De6 19.Lb2
² (0.31) Tiefe: 8 00:00:00 72kN
17.a4 e4 18.Ta3 Df5 19.Sc4 d5
² (0.31) Tiefe: 9 00:00:00 97kN
17.De3 De6 18.Sc3 d5 19.Dg3 h5
² (0.35) Tiefe: 9 00:00:00 97kN
17.De3 De6 18.Sc3 d5 19.Dg3 h5 20.Sb5
² (0.36) Tiefe: 10 00:00:01 123kN
17.De3 Dc6 18.Lf3 d5 19.Dxe5 Ld6 20.Dd4 Tfe8
² (0.37) Tiefe: 11 00:00:01 231kN
17.De3 Dc6 18.Lf3 d5 19.Dxe5 Ld6 20.Dd4 Tfe8 21.Lb2
² (0.42) Tiefe: 12 00:00:03 405kN
17.De3 Dc6 18.Lf3 d5 19.Dxe5 Ld6 20.Dd4 Dc2 21.Lxd5 Lc5 22.De5
² (0.38) Tiefe: 13 00:00:04 522kN
17.a4 De6 18.Lb5 Ta8 19.Lxd7 Sxd7 20.De3 d5 21.La3 Txa4 22.Lxe7 Txa1 23.Lxf8
² (0.42) Tiefe: 13 00:00:12 1454kN
17.a4 De6 18.Lb5 Ta8 19.Lxd7 Sxd7 20.De3 d5 21.La3 Txa4 22.Lxe7 Txa1 23.Lxf8 Kxf8
² (0.46) Tiefe: 14 00:00:17 2047kN
17.a4 De6 18.Lb5 Ta8 19.Lxd7 Sxd7 20.De3 d5 21.La3 Txa4 22.Lxe7 Txa1 23.Lxf8 d4
² (0.46) Tiefe: 15 00:00:23 2668kN
17.a4 e4 18.Ta3 De6 19.Tg3 d5 20.La3 Ta8 21.De3 Lxa3 22.Sxa3 Txa4 23.Sb5 Tc8
² (0.39) Tiefe: 16 00:01:58 14122kN
17.a4 e4 18.Ta3 De6 19.Tg3 d5 20.La3 Ta8 21.De3 Lxa3 22.Sxa3 Txa4 23.Sb5 Tc8
² (0.44) Tiefe: 17 00:02:32 18125kN

(Nemeth, Privat 21.12.2007)

In Tiefe 17 und nach 2:32 Minuten bewertet Rybka 2.3.2a diese Stellung mit nur einem geringen Nachteil von nur 0.44 Bauerneinheiten.

Das darf doch nicht wahr sein, da ist doch ein Wurm drin, oder?

Ich bin angesichts der 3000 ELO Engine langsam enttäuscht (sorry)!

(English: I am worry!)

[Uri Blass]

Rybka can avoid Bd6 with more time

Krakatoa,R - Wolkenlos,R, Wertungspartie, 3m + 0s 2007
[D]r1bqkbnr/ppp2ppp/8/3pn3/8/2P2N1P/PP2PPP1/RNBQKB1R b KQkq - 0 1

Analysis by Rybka 2.3.2a 32-bit :

5...Ne5xf3+ 6.g2xf3 Ng8-f6 7.Rh1-g1
³ (-0.26) Depth: 5 00:00:00
5...Ne5xf3+ 6.g2xf3 Ng8-f6 7.Rh1-g1 Qd8-d6
= (-0.17) Depth: 6 00:00:00 12kN
5...Ne5xf3+ 6.g2xf3 Ng8-f6 7.Rh1-g1 Qd8-d6 8.Qd1-b3
= (-0.19) Depth: 7 00:00:00 21kN
5...Ne5xf3+ 6.g2xf3 Ng8-f6 7.Rh1-g1 g7-g6 8.Nb1-a3 Bf8-c5
= (-0.14) Depth: 8 00:00:01 52kN
5...Ne5xf3+ 6.g2xf3 Ng8-f6 7.Rh1-g1 g7-g6 8.Nb1-a3 Bf8-c5 9.b2-b4
= (-0.13) Depth: 9 00:00:01 92kN
5...Ne5-c6 6.e2-e3 Ng8-f6 7.Nb1-d2 Bf8-d6 8.Bf1-d3
= (-0.17) Depth: 9 00:00:02 145kN
5...Ne5-c6 6.b2-b4 Bf8-d6 7.Qd1xd5 Ng8-f6 8.Qd5-d3 0-0
= (-0.13) Depth: 10 00:00:03 215kN
5...Bf8-d6 6.Qd1xd5 Ng8-f6 7.Qd5-d4 Ne5-c6 8.Qd4-e3+ Bd6-e7 9.Nb1-a3
= (-0.16) Depth: 10 00:00:04 276kN
5...Bf8-d6 6.Qd1xd5 Ng8-f6 7.Qd5-d4 Ne5-c6 8.Qd4-e3+ Bd6-e7 9.Nb1-a3 0-0
= (-0.18) Depth: 11 00:00:05 330kN
5...Bf8-d6 6.Qd1xd5 Ng8-f6 7.Qd5-d4 Ne5-c6 8.Qd4-e3+ Bd6-e7 9.Nb1-a3 0-0 10.Qe3-d3
= (-0.15) Depth: 12 00:00:07 428kN
5...Bf8-d6 6.Qd1xd5 Ng8-f6 7.Qd5-d4 Ne5-c6 8.Qd4-e3+ Bd6-e7 9.Nb1-a3 0-0 10.Qe3-d3 Qd8xd3 11.e2xd3 Rf8-e8
= (-0.15) Depth: 13 00:00:23 1255kN
5...Bf8-d6 6.Qd1xd5 Ng8-f6 7.Qd5-d4 Ne5-c6 8.Qd4-a4 0-0 9.Nb1-a3 Bd6-c5 10.b2-b4 Bc5-d6
= (-0.12) Depth: 14 00:00:33 1782kN
5...Ne5xf3+ 6.e2xf3 Bf8-d6 7.Nb1-a3 c7-c6 8.Bf1-d3 Qd8-f6 9.0-0 Ng8-e7 10.Rf1-e1 0-0 11.Na3-c2 Ne7-f5
= (-0.17) Depth: 14 00:01:46 5967kN

(, 21.12.2007)

[Edward German]

Thanks for this Analysis Uri, but Rybka has not MORE time if is a Blitzgame or rapid game.

BTW: What is Your opinion for my Example 2 (I lost it on playchess)? I see totally wrong Rybka moves and a totally wrong Rybka analysis! One everyone FM should be a World Champion if he can get this position in my example 2, for sure!

[Dann Corbit]

Thanks for this Analysis Uri, but Rybka has not MORE time if is a Blitzgame or rapid game.

BTW: What is Your opinion for my Example 2 (I lost it on playchess)? I see totally wrong Rybka moves and a totally wrong Rybka analysis! One everyone FM should be a World Champion if he can get this position in my example 2, for sure!

Every chess program (or human player) makes mistakes. Otherwise, they win every game. Rybka clearly makes less mistakes than other chess engines or it would not have a stupendous Elo.

Recent MES studies have shown me that Rybka does not understand fortresses. But that is OK, because you are almost never going to get the opportunity to build one anyway.

It seems to me that a good heuristic for knowing when to try to build a fortress is:
1. I am behind in material (else, why bother?)
2. We are deep in the endgame (won't work with a lot of pieces anyway)
3. A deep search shows a growing, negative eval (I might be ahead in material, but I can achieve draw by repeated check or some other easy manoever. Also, I might have a tactical shot like a fork or skewer that will pull my material back even).
4. I have access to an edge (I don't know how to build a fortress without using the edge of the board, but I suppose it can be done?).

[Edward German]

Sorry but I believe that my criticism and the two games are OK. Also Rybka may be criticized, ok?

BTW: Is Strelka now a Clone or is not?

[gerold]

Sorry but I believe that my criticism and the two games are OK. Also Rybka may be criticized, ok?

BTW: Is Strelka now a Clone or is not?

(yes)

[Ovyron]

BTW: Is Strelka now a Clone or is not?

(yes)

(Vas Rajlich examined Strelka's source code himself, and confirmed that Strelka is a clone.)

[Tony Thomas]

Playing one Rybka against another is like a normal person running in special olympics. Even if you win you are still a ret...