Author: Sune Larsson
Date: 15:43:01 03/09/01
Go up one level in this thread
On March 09, 2001 at 15:30:14, Dieter Buerssner wrote:
>On March 09, 2001 at 08:08:01, Sune Larsson wrote:
>
>> 8/6b1/4k2p/p1p1p1p1/2P1K1P1/PP3N1P/8/8 w - - 0 1
>>
>> Cortlever, 1940
>>
>> Knight vs bishop and 5 pawns each. The black pawns are tied to squares
>> of the same color as the bishop. This is the classic "bad bishop" and
>> the position is won for white. But how to do it? Putting the knight
>> on f5 and then create Zugzwang for black with a4, doesn't seem enough
>> for a win...
>>
>>
>> Test: Can your program win this position, playing white?
>> The solution, with lines by the author, further down.
>
>Yace won't find h4. The black e-pawn tastes too delicious. Nevertheless, it was
>rather successful against Shredder 5 in 45 minutes games. Note, that in the
>first game, there were allready repetitions on the board. Yace did not find any
>plan at all. But becuase of the 50 moves rule, it eventually sacced a pawn and
>got a lucky win. After this I changed the engine (made it more selective). With
>Shredder as white, Yace got a draw. Scores are from the point of view of the
>engine, and not for white allways.
Oops, that was impressing! Winning two games, as white, and drawing with
the black pieces against Shredder 5... Oops again :) Speaks for itself
I would say. Shredder is known to be very strong in endgames and not likely
to lose anything at all. Very interesting, and different, manouvers for the
win. In the first game - h4-h5 - then this b4!!?? pawn sac. In the second game
it looked real easy. Nice way of testing your program by the way - facing
the Worldchamp in such endings...:)
Sune
>
>Regards,
>Dieter
>
>AMD K6-2 475. Both programs 15 M hash, ponder off.
>
>[Event "45 Minuten/Partie"]
>[Site "Engine Match"]
>[Date "2001.03.09"]
>[Round "1"]
>[White "Yace 0.99.12"]
>[Black "Shredder 5"]
>[Result "1-0"]
>[SetUp "1"]
>[FEN "8/6b1/4k2p/p1p1p1p1/2P1K1P1/PP3N1P/8/8 w - -"]
>
>1. Ne1 {+1.39/17 2:54m} Bf8 {-1.95/19 1:33m} 2. Nd3
>{+1.45/17 1:53m} Bd6 {-1.95/18 1:02m} 3. a4 {+1.35/16
>1:13m} Kf6 {-1.59/18 2:12m} 4. Kd5 {+1.40/16 1:19m} e4
>{-1.62/17 47s} 5. Kxe4 {+1.40/15 47s} Ke6 {-1.52/18 1:06m}
>6. Kf3 {+1.39/16 55s} Be7 {-1.53/17 53s} 7. Ne1 {+1.36/15
>28s} Ke5 {-1.53/18 1:43m} 8. Ke3 {+1.41/16 53s} Bd6
>{-1.52/18 49s} 9. Nd3+ {+1.46/15 34s} Kf6 {-1.52/19 1:07m}
>10. Nf2 {+1.46/16 51s} Ke5 {-1.44/18 51s} 11. Nd1 {+1.37/16
>49s} Bf8 {-1.44/19 45s} 12. Nc3 {+1.36/17 48s} Bd6
>{-1.44/18 45s} 13. Ne2 {+1.36/15 28s} Ke6 {-1.42/14 3s}
>14. Ng1 {+1.36/16 46s} Be5 {-1.45/17 34s} 15. Nf3 {+1.36/15
>27s} Bf4+ {-1.46/16 36s} 16. Kd3 {+1.36/16 31s} Bc7
>{-1.46/17 52s} 17. h4 {+1.38/15 34s} Bf4 {-1.54/17 51s}
>18. Ke4 {+1.49/15 35s} Bc1 {-1.55/18 40s} 19. h5 {+1.43/15
>29s} Bf4 {-1.66/19 44s} 20. Ne1 {+1.41/16 23s} Bg3
>{-1.67/19 40s} 21. Nd3 {+1.60/17 35s} Bd6 {-1.67/19 36s}
>22. Ke3 {+1.60/17 31s} Be7 {-1.67/18 37s} 23. Nf2 {+1.64/17
>28s} Bd6 {-1.67/18 34s} 24. Ne4 {+1.55/17 38s} Ke7
>{-1.67/18 28s} 25. Kf2 {+1.55/17 29s} Kd7 {-1.67/18 26s}
>26. Ke3 {+1.55/16 19s} Ke7 {0.00/22 30s} 27. Kd3 {+1.55/17
>18s} Ke6 {-1.67/18 29s} 28. Ke2 {+1.55/17 35s} Ke7
>{-1.67/18 35s} 29. Ke3 {+1.55/16 27s} Kd7 {-1.64/18 38s}
>30. Nc3 {+1.55/16 25s} Ke6 {-1.56/18 30s} 31. Kf2 {+1.55/16
>25s} Ke5 {-1.56/17 25s} 32. Kf3 {+1.52/17 32s} Kd4
>{-1.56/19 27s} 33. Nb5+ {+1.51/16 20s} Ke5 {-1.55/20 28s}
>34. Ke3 {+1.52/17 25s} Ke6 {-1.56/19 28s} 35. Nc3 {+1.49/16
>19s} Bf4+ {-1.56/18 38s} 36. Kd3 {+1.48/17 30s} Bg3
>{-1.57/18 28s} 37. Ne4 {+1.48/15 16s} Bd6 {0.00/20 19s}
>38. Ke2 {+1.53/16 18s} Ke7 {0.00/19 20s} 39. Nc3 {+1.55/16
>23s} Ke6 {-1.60/17 24s} 40. Nd5 {+1.50/16 28s} Bf8
>{-1.59/17 55s} 41. Ke3 {+1.53/15 14s} Ke5 {-1.73/18 16s}
>42. Nc3 {+1.61/16 15s} Bd6 {-2.26/20 35s} 43. Ne4 {+1.63/16
>17s} Ke6 {-2.02/16 2s} 44. Kf3 {+1.69/16 18s} Ke7 {-2.26/17
>6s} 45. Nc3 {+1.60/16 19s} Ke6 {-3.81/19 54s} 46. Nd5
>{+1.60/17 24s} Ke5 {-3.81/19 23s} 47. Ne3 {+1.55/17 24s}
>Bf8 {-1.85/18 41s} 48. Nf5 {+1.55/17 13s} Kf6 {-1.68/18
>20s} 49. Ke4 {+1.54/17 22s} Ke6 {-1.68/18 17s} 50. Ne3
>{+1.49/16 16s} Bd6 {-1.68/20 17s} 51. Kd3 {+1.44/16 22s}
>Ke5 {-1.68/19 12s} 52. Nf5 {+1.42/16 12s} Bf8 {-1.26/18
>15s} 53. Ke3 {+1.39/16 15s} Kf6 {-1.44/18 7s} 54. Ke4
>{+1.42/16 14s} Ke6 {0.00/21 14s} 55. Ng3 {+1.42/16 13s} Bd6
>{-1.44/19 13s} 56. Ne2 {+1.42/17 17s} Be5 {-1.44/18 24s}
>57. Kf3 {+1.40/17 20s} Kd7 {-1.44/18 17s} 58. Nc1 {+1.40/16
>15s} Bf4 {-1.44/18 16s} 59. Nd3 {+1.42/16 10s} Bd6
>{-1.44/18 19s} 60. Ke3 {+1.42/16 12s} Ke7 {-1.44/18 20s}
>61. Kf2 {+1.40/16 19s} Ke6 {-1.44/18 14s} 62. Ne1 {+1.40/15
>13s} Ke5 {-1.27/18 17s} 63. Ke3 {+1.40/15 9s} Ke6 {-1.28/17
>8s} 64. Kf3 {+1.40/16 16s} Ke5 {0.00/18 31s} 65. Ke3
>{0.00/14 13s} Ke6 {0.00/23 11s} 66. Nd3 {+0.05/14 13s} Be7
>{0.00/17 8s} 67. Kf3 {+1.37/15 9s} Bf8 {-0.10/16 11s}
>68. Ke4 {+0.11/14 9s} Bd6 {0.00/20 8s} 69. b4 {+0.42/15
>16s} cxb4 {-0.86/16 13s} 70. Nc1 {+0.93/15 12s} Bc7
>{-0.74/16 11s} 71. Nb3 {+1.30/15 14s} Bd8 {-0.99/15 13s}
>72. c5 {+1.18/15 18s} Kd7 {-0.90/15 15s} 73. Kf5 {+1.58/15
>14s} Kc6 {-0.90/16 15s} 74. Kg6 {+3.23/15 8s} Kd5 {-4.23/15
>12s} 75. Kxh6 {+3.35/15 9s} Be7 {-4.33/14 14s} 76. Kg6
>{+3.48/15 14s} Bxc5 {-4.37/13 5s} 77. h6 {+3.97/14 11s} Bd6
>{-5.69/15 44s} 78. Kxg5 {+3.96/13 13s} Ke6 {-5.71/14 24s}
>79. Nxa5 {+4.39/13 13s} Kf7 {-4.52/12 6s} 80. Kh5 {+4.29/13
>12s} Bc7 {-4.35/13 9s} 81. Nb3 {+4.38/13 8s} Bf4 {-5.54/15
>14s} 82. a5 {+4.69/12 9s} Be3 {-5.78/15 7s} 83. g5
>{+6.05/13 9s} Bg1 {-8.61/15 40s} 84. a6 {+8.72/12 8s} Bb6
>{-10.28/15 29s} 85. g6+ {+9.03/12 11s} 1-0
>
>[Event "45 Minuten/Partie"]
>[Site "Engine Match"]
>[Date "2001.03.09"]
>[Round "1"]
>[White "Shredder 5"]
>[Black "Yace 0.99.13"]
>[Result "1/2-1/2"]
>[SetUp "1"]
>[FEN "8/6b1/4k2p/p1p1p1p1/2P1K1P1/PP3N1P/8/8 w - -"]
>
>1. Ne1 {+1.59/17 52s} Bf8 {-0.95/18 2:15m} 2. Nd3 {+1.62/19
>1:03m} Bd6 {-0.96/17 1:55m} 3. Nf2 {+1.63/18 46s} Be7
>{-1.35/19 1:07m} 4. Nh1 {+1.57/18 45s} Bd6 {-1.44/20 57s}
>5. Ng3 {+1.58/19 57s} Be7 {-1.47/19 1:09m} 6. Nf5 {+1.58/18
>1:06m} Bf8 {-1.43/19 56s} 7. a4 {+1.62/18 1:03m} Kf6
>{-1.48/18 55s} 8. Kd5 {+1.53/18 1:45m} e4 {-1.46/18 46s}
>9. Ne3 {+1.51/16 38s} Be7 {-1.46/18 46s} 10. Kxe4 {+1.57/18
>1:38m} Ke6 {-1.46/18 51s} 11. Nf5 {+1.49/17 37s} Bf8
>{-1.44/18 43s} 12. h4 {+1.48/16 39s} gxh4 {-1.45/18 48s}
>13. Nxh4 {+1.59/17 44s} Be7 {-1.48/18 38s} 14. Ng6
>{+1.62/17 56s} Bd6 {-1.47/18 34s} 15. Nf4+ {+1.62/17 43s}
>Bxf4 {0.00/19 27s} 16. Kxf4 {+1.17/14 4s} Kf6 {0.00/22 45s}
>17. Ke4 {+1.37/17 1:04m} Ke6 {0.00/22 30s} 18. Kd3
>{+1.37/10 1s} Kf6 {0.00/21 23s} 19. Ke2 {+1.37/18 43s} Ke6
>{0.00/22 39s} 20. Kf3 {+1.37/18 41s} Kf7 {0.00/21 25s}
>21. Kf2 {+1.17/17 55s} Ke6 {0.00/21 27s} 22. Kg3 {+1.37/16
>4s} Kf7 {0.00/22 40s} 23. Kf3 {+1.37/17 30s} Ke7 {0.00/22
>39s} 24. Ke3 {0.00/18 44s} Kf7 {0.00/22 35s} 25. Ke4
>{0.00/18 23s} Ke6 {0.00/22 32s} 26. Kd3 {0.00/18 28s}
>1/2-1/2
>
>[Event "45 Minuten/Partie"]
>[Site "Engine Match"]
>[Date "2001.03.09"]
>[Round "1"]
>[White "Yace 0.99.13"]
>[Black "Shredder 5"]
>[Result "1-0"]
>[SetUp "1"]
>[FEN "8/6b1/4k2p/p1p1p1p1/2P1K1P1/PP3N1P/8/8 w - -"]
>
>1. Ne1 {+1.36/19 1:24m} Bf8 {-1.63/17 1:26m} 2. Nd3
>{+1.38/19 1:47m} Bd6 {-1.63/18 59s} 3. a4 {+1.34/18 1:15m}
>Be7 {-1.49/18 58s} 4. Nxe5 {+1.40/19 1:01m} Bd8 {-1.74/18
>1:05m} 5. Nd3 {+1.39/19 53s} Be7 {-1.48/18 1:04m} 6. Ne1
>{+1.36/18 55s} Bf6 {-1.48/18 28s} 7. Ng2 {+1.42/18 32s} Bd8
>{-1.43/18 1:05m} 8. Ne3 {+1.42/19 44s} Be7 {-1.49/19 1:42m}
>9. Nf5 {+1.42/18 33s} Bf8 {-1.42/18 1:17m} 10. h4 {+1.39/17
>38s} gxh4 {-1.53/17 1:11m} 11. Nxh4 {+1.42/18 52s} Kf6
>{-1.53/18 46s} 12. Nf3 {+1.44/18 41s} Ke6 {-1.53/16 5s}
>13. Ne5 {+2.30/18 50s} Bd6 {-2.41/17 49s} 14. Nd3 {+2.49/18
>36s} Be7 {-2.69/17 57s} 15. Nf4+ {+2.52/18 40s} Kd6
>{-2.88/18 52s} 16. Kf5 {+2.58/19 47s} Bg5 {-2.81/17 25s}
>17. Nd3 {+2.61/19 46s} Bd2 {-2.75/16 16s} 18. Ne5 {+2.67/18
>45s} Bc1 {-3.16/17 44s} 19. Nf7+ {+2.77/18 33s} Ke7
>{-3.34/19 32s} 20. Kg6 {+2.82/19 1:19m} Bf4 {-3.34/15 1s}
>21. Nxh6 {+3.05/18 31s} Ke6 {-3.84/19 1:06m} 22. g5
>{+2.94/18 40s} Be3 {-3.92/17 1:09m} 23. Ng4 {+3.31/17 36s}
>Bd4 {-3.70/17 33s} 24. Nh2 {+3.43/17 23s} Ke5 {-3.92/17
>45s} 25. Kh7 {+3.22/16 21s} Ke4 {-4.61/20 3:41m} 26. g6
>{+3.29/16 20s} Kd3 {-2.55/16 1:00m} 27. Nf3 {+3.28/16 19s}
>Ba1 {-3.11/16 1:37m} 28. g7 {+3.58/16 26s} Bxg7 {-3.79/21
>3:08m} 29. Kxg7 {+3.90/15 23s} Kc3 {-4.86/23 2:35m} 30. Kf7
>{+3.90/14 22s} Kxb3 {-7.32/23 2:07m} 31. Nd2+ {+4.49/15
>22s} Kc2 {-19.25/25 1:53m} 32. Ke6 {+6.03/14 20s} Kd3
>{-17.92/20 19s} 33. Kd6 {+13.65/14 23s} Kd4 {-5.84/8 1s}
>34. Nb3+ {+15.54/14 23s} Kxc4 {-M19/29 1:13m} 35. Nxc5
>{+M19/16 19s} Kb4 {-M18/28 12s} 36. Kc6 {+M18/19 16s} Kc4
>{-M17/29 8s} 37. Nd7 {+M17/22 19s} Kb4 {-M16/31 8s} 38. Nb6
>{+M16/25 19s} Kc3 {-M15/30 7s} 39. Kb5 {+M15/26 20s} Kd4
>{-M14/30 7s} 40. Nc4 {+M14/27 8s} Kd5 {-M13/31 3s} 41. Nxa5
>{+M13/25 0s} Kd6 {-M12/4 2s} 42. Kb6 {+M12/23 0s} Kd5
>{-M11/4 0s} 43. Nc6 {+M11/19 15s} Kc4 {-M10/4 0s} 44. a5
>{+M10/19 0s} Kd5 {-M9/4 0s} 45. a6 {+M9/17 0s} Kc4 {-M8/4
>0s} 46. a7 {+M8/15 0s} Kd5 {-M7/4 0s} 47. a8=Q {+M7/13 0s}
>Ke4 {-M6/4 0s} 48. Qf8 {+M6/11 0s} Kd3 {-M5/4 0s} 49. Qf3+
>{+M5/9 0s} Kc2 {-M4/4 0s} 50. Qe2+ {+M4/7 0s} Kb3 {-M3/4
>0s} 51. Qd2 {+M3/5 0s} Ka3 {-M2/4 0s} 52. Nd4 {+M2/4 0s}
>Ka4 {-M1/4 0s} 53. Qa5+ {+M1/4 0s} 1-0
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