Author: blass uri
Date: 08:16:13 04/02/00
Go up one level in this thread
On April 02, 2000 at 10:58:38, Harald Faber wrote:
>On April 02, 2000 at 03:34:11, blass uri wrote:
>
>>>First I thought this is the losing position, where white plays Nf5 with rook
>>>exchange but loss of the white a-pawn. But try against Tiger, it shows 41.Rb7!
>>>This is a very fine move which keeps the advantage and cares for the connected
>>>pawns. Main line is:
>>>
>>>41.Rb7 Ra2 42.Ng4! a5 43.h4! (creates a free pawn for white) gxh4 44.gxh4 e3
>>>45.Nxe3 Ra4 46.Kg3 Ra1 47.h5 Rh1 48.Kg4 a4 49.Kg5 a3 50.Ra7 with a clearly won
>>>position. After 12min Tiger changes to 50.Nf5 +7.xx.
>>>It is probably worth trying the other top programs, I will try Rebel and Junior
>>>on it.
>>>
>
>
>Rebel Century 1.2: 41.Rf7+ Ke8 42.Rg7 a5 43.Rxg5 Rc4 44.Rxe5+ Kd7 45.Nf5 a4
>46.h4 Rc5?? 47.Rxc5 bxc5 48.Ne3 a3 49.Nc2 a2 50.g4 over and out, the knight has
>the black pawns under control and the connected passed pawns g and h win the
>game.
>Junior needs some more moves, follows Rebels moves up to 45.h4 a4 46.Ng8 Kd6
>47.Rb5 a3 48.Rxb6+ Rc6 49.Rb1 Ke6 50.Nh6 a2 51.Ra1 Ra6 52.g4 Ke5 53.Nf5 Kf4
>54.Ne3 Ra7 55.g5 Ra6 56.Kh3 Ra3 57.g6 Ra7 58.Nd5+ Kf5 59.Rxa2! Rxa2 60.g7 Ra8
>61.Ne7+ Ke6 62.g8-Q over and out.
>
>Also Hiarcs7.32 is able to win: 45.g4 a4 46.Nf5 a3 47.Re7+ Kc6 48.Ra7 Rc3
>49.Nd4+ Kc5 50.Nc2 Rxc2 51.Rc7+ looks also VERY promising...
>
>
>Seems as if all other programs would have won the endgame. ;-)
>
>
>>>>[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.
>
>
>>65...Ka2 66.Qa8+ Kb2 67.Qb8+ and 68.Qxb1+ Kxb1 69.Kf1 is also a win by nalimov
>>tablebases.
>
>See above, 61...Kxa1 and mate in 77. :-)
>
>>In the game after 60.Qc4 Fritz offered a draw and the operator of shredder
>>refused because the evaluation was +0.02.
>>
>>Uri
>
>So again operator's fault? ;-)
Both operators's fault.
Fritz did a mistake by offering a draw and shredder did a mistake by declining
the offer.
Uri
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