Author: Ed Schröder
Date: 02:37:15 10/29/01
Go up one level in this thread
On October 29, 2001 at 01:30:12, Dieter Buerssner wrote:
>Tinker caught Yace in a nice stalemate trap.
>
>[D] 7k/6R1/6R1/1r5P/6K1/8/8/8 b - - 0 55
>
>Yace just captured on g7. It is easy to see for a human, but engines seem to
>have problems with this. Yace got a nice fail low from +7.4 to draw score in the
>next move. Do other engines see this immediately? With and without TBs (KRRKR
>can help here). I have some stalemate detection code in quiescence search, which
>is normally disabled. I enabled this again, in the hope, that this will make it
>much faster. But with no success.
Nice position... I tried to find the longest (is it?) defence:
1..Rg5 2.Kf4 Rf5 3.Ke4 Re5 4.Kd4 Rd5 5.Kc4 Rc5 6.Kb4 Rb5 7.Kc3 Rc5
8.Kd3 Rd5 9.Ke3 Re5 10.Kf3 Rf5 11.Kg3 Rg5 12.Kf2 Rf5 13.Ke2 Re5 14.Kd2
Rd5 15.Kc2 Rc5 16.Kb2 Rb5 17.Kc1 Rc5 18.Kd1 Rd5 19.Ke1 Re5 20.Kf1 Rf5
21.Kg2 Rg5 22.Kh3 Rg3 23.Kh2 Rg2 24.Kh1 Rg1 25.Kh2 Rg2 -> repetition
Typical position for the King I would say.
But how can you evaluate (detect) stalemate in QS?
Looks pretty dangerous to me because of its selective nature and
you can't just say score=0.00 in case no more captures or checks
are generated. So what is the big secret?
Ed
>Here is the whole game:
>
>[Event "Computer chess game 0 300 +3 0 0"]
>[Site "ICC"]
>[Date "2001.10.28"]
>[Round "5"]
>[White "Yace 0.99.57"]
>[Black "Tinker"]
>[Result "1/2-1/2"]
>[WhiteElo "2972"]
>[BlackElo "2519"]
>[ECO "B78"]
>[Opening "Sicilian"]
>[Variation "Dragon, Yugoslav attack, 10.O-O-O"]
>[Timecontrol "0 300 +3 0 0"]
>[Time "Sun Oct 28 01:07:14 2001"]
>[last_book_move "17. f5"]
>
>1. e4 {0s} c5 {1s} 2. Nf3 {0s} d6 {2s} 3. d4 {0s} cxd4 {1s} 4. Nxd4 {0s} Nf6
>{2s} 5. Nc3 {0s} g6 {2s} 6. Be3 {0s} Bg7 {2s} 7. f3 {0s} O-O {2s} 8. Qd2 {0s}
>Nc6 {2s} 9. Bc4 {0s} Bd7 {2s} 10. O-O-O {0s} Rc8 {2s} 11. Bb3 {0s} Ne5 {2s}
>12. h4 {0s} h5 {3s} 13. Bg5 {0s} Rc5 {2s} 14. g4 {0s} hxg4 {2s} 15. f4 {0s}
>Nc4 {2s} 16. Qe2 {0s} b5 {2s} 17. f5 {0s} Qc8 {2s} 18. fxg6 {0.48/8 33s} a6
>{2s} 19. gxf7+ {0.53/7 25s} Kxf7 {2s} 20. Bxc4+ {0.54/8 20s} Rxc4 {0s} 21.
>Rhf1 {0.58/7 18s} Rxc3 {0s} 22. bxc3 {0.58/8 10s} Qxc3 {29s} 23. Qd3
>{0.62/9 0s} Qxd3 {0s} 24. cxd3 {0.55/10 14s} Kg6 {0s} 25. Ne2 {0.77/9 14s} e5
>{0s} 26. Kd2 {0.74/9 10s} d5 {9s} 27. Bxf6 {0.45/9 3s} Rxf6 {1s} 28. exd5
>{0.50/10 7s} Rd6 {1s} 29. Nc3 {0.51/10 9s} b4 {16s} 30. Ne4 {0.44/11 0s} Rxd5
>{9s} 31. h5+ {0.45/10 4s} Kh6 {0s} 32. Rf7 {0.49/11 11s} Be6 {0s} 33. Rc7
>{1.13/10 13s} Bf5 {0s} 34. Rc6+ {1.15/10 7s} Kh7 {15s} 35. Ng5+ {1.17/10 0s}
>Kg8 {5s} 36. Ke3 {1.17/10 3s} g3 {7s} 37. Rxa6 {1.67/9 1s} g2 {5s} 38. Ne4
>{2.17/10 7s} b3 {0s} 39. axb3 {2.99/9 7s} Bxe4 {8s} 40. Kxe4 {3.67/11 4s} Rd4+
>{5s} 41. Ke3 {3.73/12 7s} Rg4 {0s} 42. Rg1 {3.87/11 12s} Rg3+ {0s} 43. Ke4
>{4.75/11 11s} Kh7 {15s} 44. Rg6 {4.75/12 0s} Rh3 {8s} 45. R1xg2 {4.77/11 3s}
>Bh6 {8s} 46. Kxe5 {4.82/10 3s} Rxd3 {0s} 47. Rc2 {4.94/9 11s} Bg7+ {6s} 48.
>Ke4 {4.97/10 5s} Rd4+ {5s} 49. Ke3 {5.12/11 1s} Rd7 {8s} 50. b4 {5.29/10 3s}
>Re7+ {7s} 51. Kf3 {5.44/12 3s} Rf7+ {7s} 52. Kg4 {5.43/12 2s} Rb7 {0s} 53. b5
>{5.76/11 11s} Rxb5 {0s} 54. Rc7 {7.45/12 9s} Kh8 {1s} 55. Rcxg7 {7.43/11 4s}
>Rg5+ {7s} 56. Kf3 {0.00/18 1s} Rf5+ {0s} 57. Ke2 {0.00/21 6s} Re5+ {0s} 58.
>Kd1 {0.00/23 8s} Rd5+ {6s} 59. Ke1 {0.00/24 4s} Re5+ {0s} 60. Kd1 {0.00/25 6s}
>Rd5+ {7s} 61. Kc2 {0.00/25 3s} Rc5+ {0s} 62. Kd2 {0.00/26 10s} Rd5+ {0s} 63.
>Ke3 {0.00/26 10s} Re5+ {0s} 64. Kd4 {0.00/26 9s} Rd5+ {5s} 65. Kxd5
>{0.00/27 2s} 1/2-1/2 {Tinker stalemated}
>
>Another nice curiosity from a game vs. Postmodernist
>
>[D] 8/8/5kpp/8/2P5/K5P1/8/8 b - - 0 55
>
>this is in the log file:
>
>tellics kibitz Mate in 88
> 1577584 16.181 Mat88 19u. 55...h5 56.c5 g5 57.Ka2 Ke6 58.Kb2 h4 59.Kb1 h3
> 60.Kc1 h2 61.Kd2 Kf6 62.c6 h1=Q 63.c7 Qg2+
> 64.Kd1 Qxg3 {EGTB} 65.c8=Q! Qe3! 66.Qd7! Ke5!
> 67.Qg4! Qf4! 68.Qd7! Qf3+! 69.Ke1! Kf4!
> 70.Qd6+! Kg4! 71.Qe6+ Kg3! 72.Qe5+! Qf4!
> 73.Qc3+! Kg2 74.Qb2+! Kh3! 75.Qb7! g4! 76.Qh7+!
> Kg3! 77.Qd3+! Qf3! 78.Qd6+! Kg2! 79.Qd2+! Kg1!
> 80.Qd4+! Kh2! 81.Qb2+! Qg2! 82.Qh8+! Qh3!
> 83.Qb2+! Kh1! 84.Qb7+! Qg2! 85.Qh7+! Kg1!
> 86.Qa7+! Kh2! 87.Qh7+! Qh3! 88.Qc2+! Kg1!
> 89.Qc5+! Kh1! 90.Qc6+! Qg2! 91.Qh6+! Kg1!
> 92.Qb6+ Kh2! 93.Qh6+! Qh3! 94.Qd2+! Kh1!
> 95.Qd5+ Qg2! 96.Qh5+! Kg1! 97.Qc5+! Kh2!
> 98.Qh5+! Qh3! 99.Qg5 g3! 100.Qe5 Qg2 101.Qf5
> Kg1! 102.Qe5 Qh2 103.Kd1! Qf2! 104.Qe7 Qd4+!
> 105.Ke1 g2! 106.Qh7! Qf2+! 107.Kd1 Qe3! 108.Qh8
> Qe4! 109.Kd2! Kf2! 110.Qf6+! Kg3! 111.Qg5+!
> Kh3! 112.Qh5+! Qh4! 113.Qf5+! Kh2! 114.Qe5+!
> Kh1! 115.Qd5! Qg4! 116.Kc1! Qf4+ 117.Kb1! Qh4
> 118.Kc1 Qf6! 119.Kb1! Qc3! 120.Qh5+ Kg1!
> 121.Qe2! Qb4+! 122.Ka2! Qd4 123.Ka3! Qf4
> 124.Qd1+ Kf2 125.Qc2+! Kg3! 126.Qc5 Kf3!
> 127.Qc6+! Qe4! 128.Qf6+! Ke3! 129.Qh6+ Kf2!
> 130.Qh2! Qg4! 131.Ka2 Qb4! 132.Qh3 Qc4+
> 133.Kb2! g1=Q 134.Qf5+! Ke2 135.Qe5+! Qe3
> 136.Qh2+! Qf2 137.Qxf2+! Kxf2! 138.Kb1 Qb4+
> 139.Kc1 Qb3 140.Kd2 Qc4! 141.Kd1 Ke3! 142.Ke1
> Qc1# {1001}
>
>Of course the mate is much shorter, but it was nice to see this anyway.
>
>[Event "Computer chess game 0 300 +3 0 0"]
>[Site "?"]
>[Date "2001.10.29"]
>[Round "12"]
>[White "PostModernist"]
>[Black "Yace 0.99.57"]
>[Result "0-1"]
>[WhiteElo "2744"]
>[BlackElo "2982"]
>[ECO "D37"]
>[Opening "QGD"]
>[Variation "4.Nf3"]
>[Timecontrol "0 300 +3 0 0"]
>[Time "Mon Oct 29 02:19:16 2001"]
>[last_book_move "10...exd5"]
>[LogFile "logs\yace0317.log"]
>
>1. d4 {0s} d5 {0s} 2. Nf3 {2s} Nf6 {0s} 3. c4 {2s} e6 {0s} 4. Nc3 {1s} Be7
>{0s} 5. Bg5 {1s} h6 {0s} 6. Bxf6 {2s} Bxf6 {0s} 7. e3 {2s} O-O {0s} 8. Qc2
>{2s} c5 {0s} 9. dxc5 {2s} Qa5 {0s} 10. cxd5 {2s} exd5 {0s} 11. O-O-O {2s} Bxc3
>{-0.14/10 34s} 12. Qxc3 {2s} Qxc3+ {-0.06/11 24s} 13. bxc3 {2s} Be6
>{-0.10/12 19s} 14. Nd4 {2s} Rc8 {-0.26/12 16s} 15. Nxe6 {2s} fxe6
>{-0.38/11 12s} 16. e4 {2s} Nd7 {-0.39/11 10s} 17. exd5 {51s} Nxc5
>{-0.56/11 0s} 18. f3 {0s} exd5 {-0.34/10 8s} 19. Rxd5 {9s} Na4 {-0.15/11 0s}
>20. c4 {0s} Nb6 {-0.41/10 13s} 21. Rd4 {2s} Rc7 {-0.41/10 11s} 22. Kc2 {0s}
>Rac8 {-0.48/11 13s} 23. Kb3 {1s} Nd7 {-0.52/10 11s} 24. f4 {0s} Nc5+
>{-0.37/9 12s} 25. Kc2 {0s} Ne6 {-0.08/11 8s} 26. Re4 {14s} Nc5 {-0.23/11 0s}
>27. Re1 {12s} Na4 {-0.40/9 0s} 28. Kb3 {0s} Nb6 {-0.38/10 8s} 29. Re4 {13s}
>Nd7 {-0.47/10 0s} 30. Ka3 {11s} Nb6 {-0.49/10 0s} 31. Kb4 {11s} Rd8
>{-0.73/9 0s} 32. Be2 {10s} Rd2 {-0.59/9 2s} 33. Kb3 {0s} Nd7 {-0.54/9 12s} 34.
>Re8+ {5s} Kf7 {-0.15/10 7s} 35. Re3 {3s} Nc5+ {-0.34/9 8s} 36. Ka3 {4s} Rc6
>{-0.34/9 7s} 37. Rd1 {29s} Rc2 {-0.44/9 0s} 38. Rd5 {10s} Ra6+ {-0.35/8 1s}
>39. Kb4 {2s} Ne6 {-0.28/9 5s} 40. f5 {3s} Nf4 {-0.07/9 7s} 41. Rd7+ {5s} Kf6
>{-0.26/9 3s} 42. Bf3 {8s} Raxa2 {-0.22/8 1s} 43. g3 {0s} Rab2+ {-0.04/8 7s}
>44. Ka3 {0s} Ra2+ {-0.33/9 13s} 45. Kb3 {0s} Rcb2+ {0.00/8 10s} 46. Kc3 {1s}
>Rxh2 {0.04/9 9s} 47. Rxb7 {16s} Ne2+ {0.12/9 0s} 48. Bxe2 {24s} Rhxe2
>{0.04/12 0s} 49. Re6+ {9s} Rxe6 {0.01/12 1s} 50. fxe6 {9s} g6 {0.04/12 1s} 51.
>e7 {13s} Re2 {0.00/13 0s} 52. Rxa7 {19s} Rxe7 {0.00/14 0s} 53. Ra3 {0s} Re3+
>{6.65/13 6s} 54. Kb4 {10s} Rxa3 {9.39/14 0s} 55. Kxa3 {16s} h5 {+M88/18 4s}
>56. Kb4 {0s} g5 {+M17/18 7s} 57. Kb5 {0s} h4 {+M16/19 10s} 58. g4 {4s} h3
>{+M13/14 7s} 59. c5 {0s} h2 {+M11/13 10s} 60. c6 {0s}
>0-1 {PostModernist resigns}
>
>53. Rxe7 (and probably many more moves) would be draw.
>
>For the opening experts. You may see how Yace calls the opening and the ECO
>code. In my database I actually have
>
>1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3
>
>for this name. Is it correct, to call it the same with the transposition of
>moves?
>
>Shredder 5 calls it D55 classical Queens gambit (my translation from the German
>"klassisches Damengambit).
>
>Regards,
>Dieter
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