Author: Vincent Lejeune
Date: 11:55:40 09/15/05
Go up one level in this thread
http://www.chessgames.com/perl/chessgame?gid=1011478 [Event "Wijk aan Zee"] [Site "Wijk aan Zee"] [Date "1999.??.??"] [EventDate "?"] [Round "4"] [Result "1-0"] [White "Kasparov Gary (RUS)"] [Black "Topalov Veselin (BUL)"] [ECO "B07"] [WhiteElo "?"] [BlackElo "?"] [PlyCount "87"] 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 Bg7 5. Qd2 c6 6. f3 b5 7. Nge2 Nbd7 8. Bh6 Bxh6 9. Qxh6 Bb7 10. a3 e5 11. O-O-O Qe7 12. Kb1 a6 13. Nc1 O-O-O 14. Nb3 exd4 15. Rxd4 c5 16. Rdd1 Nb6 17. g3 Kb8 18. Na5 Ba8 19. Bh3 d5 20. Qf4+ Ka7 21. Rhe1 d4 22. Nd5 Nbxd5 23. exd5 Qd6 24. Rxd4 cxd4 25. Re7+ Kb6 26. Qxd4+ Kxa5 27. b4+ Ka4 28. Qc3 Qxd5 29. Ra7 Bb7 30. Rxb7 Qc4 31. Qxf6 Kxa3 32. Qxa6+ Kxb4 33. c3+ Kxc3 34. Qa1+ Kd2 35. Qb2+ Kd1 36. Bf1 Rd2 37. Rd7 Rxd7 38. Bxc4 bxc4 39. Qxh8 Rd3 40. Qa8 c3 41. Qa4+ Ke1 42. f4 f5 1-0 On September 15, 2005 at 04:30:38, Mark Young wrote: >On September 14, 2005 at 17:05:59, Ernst Walet wrote: > >>Because Zappa 1.1 is SMP and 64 bit, I gave it a try and was pleasant suprised. >>One of my favourite chess positions is this one, where Kasparov played Rxd4. >>How do other engines do? If your engine finds it please give it a couple of more >>plies to see if it holds it. > >The better test for the engine in this position, is to see when the program see >that Rxd4 is not winning. Since Rxd4 is only a draw with best play. >This is why many programs will not play Rxd4, or drop the move with a longer >search. > > >> >>Ernst. >> >> >>[D]b2r3r/k4p1p/p2q1np1/NppP4/3p1Q2/P4PPB/1PP4P/1K1RR3 w - - >> >>CPU0: AuthenticAMD AMD64 Family 15 Model 43 Stepping 1 2203 MHz >>CPU1: AuthenticAMD AMD64 Family 15 Model 43 Stepping 1 2203 MHz >>GUI: Tablebases with 5 pieces found! [Cache: 16 MB + internal 13.67 MB] >>Engine: Zappa 1.1 (1024 MB) >>by Anthony Cozzie >> 9.00 0:01 -0.23 1.Nc6+ Bxc6 2.Qxd6 Rxd6 3.dxc6 Rxc6 4.c3 dxc3 5.Re7+ Kb6 >>6.bxc3 (2.190.136) 1401 >> 10.00 0:01 -0.08 1.Nc6+ Bxc6 2.Qxd6 Rxd6 3.dxc6 Nd5 4.c3 dxc3 5.c7 f5 >>(2.585.518) 1414 >> 10.00 0:03 -0.08 1.Nc6+ Bxc6 2.Qxd6 Rxd6 3.dxc6 Nd5 4.c3 dxc3 5.c7 f5 >>(4.590.886) 1498 >> 11.00 0:03 -0.14 1.Nc6+ Bxc6 2.Qxd6 Rxd6 3.dxc6 Kb6 4.Re7 Kxc6 5.Rxf7 Re8 >>6.c3 (5.088.000) 1507 >> 11.00 0:05 -0.14 1.Nc6+ Bxc6 2.Qxd6 Rxd6 3.dxc6 Kb6 4.Re7 Kxc6 5.Rxf7 Re8 >>6.c3 (8.923.952) 1568 >> 12.00 0:07 -0.55 1.Nc6+ Bxc6 2.Qxd6 Rxd6 3.dxc6 Kb6 4.Re7 Kxc6 5.Rde1 Nd5 >>6.Rxf7 b4 (12.367.553) 1567 >> 12.00 0:17 -0.55 1.Nc6+ Bxc6 2.Qxd6 Rxd6 3.dxc6 Kb6 4.Re7 Kxc6 5.Rde1 Nd5 >>6.Rxf7 b4 (28.349.537) 1621 >> 13.00 0:19 -0.29 1.Nc6+ Bxc6 2.Qxd6 Rxd6 3.dxc6 Kb6 4.Re7 Kxc6 5.Rde1 Rf8 >>6.f4 Nd7 7.b3 (31.282.737) 1623 >> 13.00 0:32 -0.25 1.Rxd4 cxd4 2.Re7+ Kb6 3.Qxd4+ Kxa5 4.b4+ Ka4 5.Qc3 Bxd5 >>6.Kb2 Qc5 7.bxc5 Rhe8 (53.481.819) 1643 >> 13.00 0:40 -0.20 1.Rxd4 Bxd5 2.Qxd6 Rxd6 3.Rd3 Kb6 4.b4 Re8 5.Rxe8 Nxe8 >>6.Rc3 cxb4 7.axb4 (67.094.549) 1676 >> 13.00 0:41 -0.20 1.Rxd4 Bxd5 2.Qxd6 Rxd6 3.Rd3 Kb6 4.b4 Re8 5.Rxe8 Nxe8 >>6.Rc3 cxb4 7.axb4 (69.988.250) 1676 >> 14.00 1:27 -0.08 1.Rxd4 Rhf8 2.Qxd6 Rxd6 3.Rd2 Kb6 4.b4 Rxd5 5.Nb3 cxb4 >>6.axb4 Rxd2 7.Nxd2 Re8 (150.876.641) 1721 >> 14.00 1:46 -0.08 1.Rxd4 Rhf8 2.Qxd6 Rxd6 3.Rd2 Kb6 4.b4 Rxd5 5.Nb3 cxb4 >>6.axb4 Rxd2 7.Nxd2 Re8 (183.700.881) 1719 >> 15.00 2:49 -0.23 1.Rxd4 Bxd5 2.Rxd5 Nxd5 3.Qxf7+ Nc7 4.Re6 Rd7 5.Rxd6 Rxf7 >>6.Nc6+ Ka8 7.Ne5 Re7 8.f4 Rhe8 (293.486.566) 1734 >> 15.00 3:59 -0.23 1.Rxd4 Bxd5 2.Rxd5 Nxd5 3.Qxf7+ Nc7 4.Re6 Rd7 5.Rxd6 Rxf7 >>6.Nc6+ Ka8 7.Ne5 Re7 8.f4 Rhe8 (412.069.282) 1721 >> 16.00 7:20 -0.15 1.Rxd4 Rhg8 2.Qxd6 Rxd6 3.Rf4 Kb6 4.b4 cxb4 5.axb4 Nxd5 >>6.Rxf7 Nxb4 7.Nb3 Bd5 8.Rxh7 Bxf3 (741.746.107) 1684 >> 16.00 9:54 -0.15 1.Rxd4 Rhg8 2.Qxd6 Rxd6 3.Rf4 Kb6 4.b4 cxb4 5.axb4 Nxd5 >>6.Rxf7 Nxb4 7.Nb3 Bd5 8.Rxh7 Bxf3 (991.280.574) 1666 >>best move: Rd1xd4 time: 9:59.797 min n/s: 1.666.541 nodes: 991.280.574
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