Author: Ernst Walet
Date: 14:05:59 09/14/05
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. 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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