Author: blass uri
Date: 08:27:23 04/02/00
Go up one level in this thread
On April 02, 2000 at 10:58:38, Harald Faber wrote:
>>>>[Event "?"]
>>>>[Site "?"]
>>>>[Date "2000.03.31"]
>>>>[Round "7"]
>>>>[White "Shredder 4"]
>>>>[Black "Fritz 6"]
>>>>[Result "0-1"]
>>>>
>>>>1. d4 {book 0s} Nf6 {20s} 2. c4 {book 0s} e6 {8s} 3. Nf3
>>>>{book 0s} d5 {7s} 4. g3 {book 0s} dxc4 {7s} 5. Bg2 {book
>>>>0s} Be7 {9s} 6. Nc3 {book 0s} O-O {14s} 7. Ne5 {book 0s} c5
>>>>{10s} 8. dxc5 {book 0s} Qxd1+ {13s} 9. Nxd1 {book 0s} Bxc5
>>>>{16s} 10. Nxc4 {book 0s} Nc6 {11s} 11. Bd2 {-0.08/12 4:08m}
>>>>Bd7 {2:57m} 12. Rc1 {-0.16/12 2:44m} Be7 {4:07m (Rfd8)}
>>>>13. Nc3 {-0.02/12 3:42m} Rfd8 {3:03m} 14. O-O {0.00/12 0s}
>>>>e5 {4:58m (Rac8)} 15. Bg5 {+0.16/12 5:40m} h6 {7:29m (Be6)}
>>>>16. Bxf6 {+0.31/11 44s} Bxf6 {45s} 17. Rfd1 {+0.33/12
>>>>1:51m} Rab8 {5:07m (Be6)} 18. e3 {+0.50/13 3:46m} g6 {1:26m
>>>>(Be6)} 19. b3 {+0.57/12 5:54m} Kg7 {2:44m (Be6)} 20. Nd5
>>>>{+1.02/13 3:44m} Be6 {3:53m} 21. Nxf6 {+0.84/14 37s} Kxf6
>>>>{2:03m (Rxd1+)} 22. Nd6 {+0.67/14 5:49m} Nb4 {15s} 23. a3
>>>>{+0.88/13 3:30m} Na2 {6:13m (Nd5)} 24. Rc7 {+0.96/13 3:40m}
>>>>b6 {14s} 25. Bf1 {+0.99/12 2:40m} Bxb3 {3:15m} 26. Rd3
>>>>{+0.93/14 1:41m} Be6 {2:09m} 27. e4 {+1.28/14 3:27m} Rf8
>>>>{20s} 28. Rf3+ {+1.90/14 1:27m} Kg7 {2:19m} 29. Bc4
>>>>{+1.88/14 0s} Bxc4 {6:03m} 30. Rxc4 {+1.84/16 1:11m} Rbd8
>>>>{7:02m} 31. Rd3 {+2.09/15 0s} f5 {4:41m (Kf6)} 32. Rc2
>>>>{+2.67/15 4:43m} Kg8 {20s (fxe4)} 33. Rxa2 {+3.03/16 4:30m}
>>>>fxe4 {11s} 34. Rdd2 {+3.01/15 3:55m} Rf3 {4:03m (a6)}
>>>>35. Kg2 {+3.12/15 4:09m} g5 {10:43m} 36. a4 {+3.10/16 7s}
>>>>Rb3 {3:34m (Rd3)} 37. Nf5 {+3.29/15 4:00m} Rxd2 {15s}
>>>>38. Rxd2 {+3.32/12 1s} Ra3 {2:18m (Rb4)} 39. Rd7 {+3.47/15
>>>>5:24m} Rxa4 {12s} 40. Nxh6+ {+4.13/17 6:30m} Kf8 {28s}
>>>>41. Rf7+ {+4.20/15 1:05m} Ke8 {27s} 42. Rg7 {+4.33/15 53s}
>>>>a5 {2:05m (e3)} 43. Rxg5 {+4.70/14 58s} Rc4 {1:26m}
>>>>44. Rxe5+ {+4.93/13 9s} Kd7 {3:50m} 45. g4 {+5.45/14 0s} a4
>>>>{8s} 46. Nf5 {+5.56/14 2:23m} a3 {34s} 47. Re7+ {+6.38/14
>>>>1:07m} Kc6 {1:52m} 48. Ra7 {+6.32/15 1:13m} Rc3 {2:53m}
>>>>49. h4 {+6.09/15 4:52m} b5 {3:25m} 50. Ne7+ {+6.07/13 0s}
>>>>Kb6 {6:11m} 51. Nd5+ {+2.91/15 9:29m} Kxa7 {38s} 52. Nxc3
>>>>{+0.77/15 28s} b4 {24s} 53. Nb5+ {+0.10/15 2:32m} Ka6 {19s
>>>>(Kb6)} 54. Nd4 {+0.77/16 1:11m} a2 {15s} 55. Nb3 {+0.53/16
>>>>52s} Kb5 {21s} 56. g5 {0.00/16 4:13m} Ka4 {35s (Kc4)}
>>>>57. g6 {+0.04/14 1:17m} Kxb3 {17s} 58. g7 {+0.43/11 1:05m}
>>>>a1=Q {2:57m} 59. g8=Q+ {0.00/13 0s} Kb2 {2:45m} 60. Qc4
>>>>{+0.02/12 0s}
>>
>>This was the missing win blunder.
>>
>>Shredder could win by 60.Qh8+ Ka2 61.Qxa1+ Kxa1 62.h5 b3 63.h6 b2 64.h7 b1Q
>>65.h8Q+ Qb2 66.Qa8+ Kb1 67.Qxe4+ and my thompson tablebases say +- for white in
>>61 moves
>
>
>You are right although Nalimov says #72. Therefore Fritz6a recognizes the mate
>for 61...Kxa1 +- #77 in only a few seconds on my K6-200.
>Another riddle is my Shredder4-output for move no.60 at depth 12:
>
>10.01 0:40.05 +0.19 60.Dc4 b3 61.Dxe4 Dc1 62.De2+ Ka3 63.h5 b2 64.Da6+ Kb3
>65.h6 (1.722.825) 43.0
>10 -> 1:03.79 +0.19 60.Dc4 b3 61.Dxe4 Dc1 62.De2+ Ka3 63.h5 b2 64.Da6+ Kb3
>65.h6 (2.865.277) 44.9
>11.01 2:23.03 +0.05 60.Dc4 De1 61.h5 b3 62.h6 Dc1 63.Dd4+ Ka2 64.Da7+ Da3
>65.Dxa3+ Kxa3 66.h7 b2 67.h8D b1D 68.Dd4 (7.190.307) 50.2
>11.02 2:27.40 +0.06++ 60.Dg7+ Kb1 61.Dxa1+ Kxa1 62.h5 b3 63.h6 b2 64.h7 b1D
>65.h8D+ Ka2 66.Da8+ Kb2 67.Db8+ Ka1 68.De5+ Ka2 69.Da5+ Kb2 (7.467.389) 50.6
>11.02 2:45.06 +0.08 60.Dg7+ Kb1 61.Dxa1+ Kxa1 62.h5 b3 63.h6 b2 64.h7 b1D
>65.h8D+ Ka2 66.Da8+ Kb2 67.Db7+ Ka1 68.Da6+ Kb2 69.Db5+ Ka1 70.De2 (8.470.954)
>51.3
>11 -> 4:07.01 +0.08 60.Dg7+ Kb1 61.Dxa1+ Kxa1 62.h5 b3 63.h6 b2 64.h7 b1D
>65.h8D+ Ka2 66.Da8+ Kb2 67.Db7+ (12.649.197) 51.2
>12.01 5:02.77 0.00 60.Dg7+ Kb1 61.Dxa1+ Kxa1 62.h5 b3 63.h6 b2 64.h7 b1D
>65.h8D+ Ka2 66.Da8+ Kb2 67.Db7+ Kc1 68.Dxb1+ Kxb1 69.Kf1 Kb2 (16.219.602) 53.5
>12 -> 8:38.69 0.00 60.Dg7+ Kb1 61.Dxa1+ Kxa1 62.h5 b3 63.h6 b2 64.h7 b1D
>65.h8D+ Ka2 66.Da8+ Kb2 67.Db7+ (27.388.748) 52.8
>
>So Shredder would play like your PV, and somewhere at 62.h5 or 63.h6 see the
>mate in >70.
I do not know the reason that shredder played in the game 60.Qc4 when your pv
shows 60.Qg7+.
The reason may be different hash tables or some learning from previous search.
It cannot be an operator error because in this case I think that shredder does
not show evaluation after 60.Qc4
Uri
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