Author: Allen Lake
Date: 00:01:40 02/18/02
Go up one level in this thread
On February 17, 2002 at 21:35:42, Bob Basham wrote: >White won in this position by playing 1. Nxf7 (KxN), >then 2. Bxg6+..! > >My old version of Fritz 5.32 finds this even before the new version of Fritz 7.. > >Could it be that when they make improvements on something in a chess program >that it weakens another area? >Just wondering... > >[D]r1b1r1k1/1p1n1p2/p1nBp1p1/q2pP1Np/P7/R2B3Q/2P2PPP/5RK1 w - - > >Some computor programs do not find Nxf7 at all... I tested several Winboard engines, but this just knocked my socks off. Yace saw both sacrifices in 3.03 seconds, but look at this performance by Sjeng 12.7. Sjeng saw both sacrifices in 1.59 seconds!! In case you are wondering about the format of my log, I ran this test in the new Scid 3.2beta4 environment, on an Athlon 1200 MHz with 512MB RAM. Scid-Engine communication log file Engine: Sjeng 12.7 Command: C:/scid-engines/sjeng12_7/Sjeng127.exe Date: Mon Feb 18 01:58:06 Eastern Standard Time 2002 This file was automatically generated by Scid. It is rewritten every time an engine is started in Scid. Engine: Allocated 800000 hash entries, totalling 32000000 bytes. NOTE : First line from engine seen; sending it initial commands now. Scid : xboard Scid : protover 2 Scid : post Engine: Engine: Sjeng version 12.7, Copyright (C) 2000-2001 Gian-Carlo Pascutto Engine: Engine: Sjeng comes with ABSOLUTELY NO WARRANTY; for details type 'warranty' Engine: This is free software, and you are welcome to redistribute it Engine: under certain conditions; type 'distribution' Engine: Engine: 4 piece endgame tablebases found Engine: Allocated 1302Kb for indices and tables. Engine: Engine: +----+----+----+----+----+----+----+----+ Engine: 8 | *R | *N | *B | *Q | *K | *B | *N | *R | Engine: +----+----+----+----+----+----+----+----+ Engine: 7 | *P | *P | *P | *P | *P | *P | *P | *P | Engine: +----+----+----+----+----+----+----+----+ Engine: 6 | | | | | | | | | Engine: +----+----+----+----+----+----+----+----+ Engine: 5 | | | | | | | | | Engine: +----+----+----+----+----+----+----+----+ Engine: 4 | | | | | | | | | Engine: +----+----+----+----+----+----+----+----+ Engine: 3 | | | | | | | | | Engine: +----+----+----+----+----+----+----+----+ Engine: 2 | P | P | P | P | P | P | P | P | Engine: +----+----+----+----+----+----+----+----+ Engine: 1 | R | N | B | Q | K | B | N | R | Engine: +----+----+----+----+----+----+----+----+ Engine: Engine: a b c d e f g h Engine: Engine: Sjeng: Engine: feature ping=1 setboard=1 playother=0 san=0 usermove=0 time=1 Engine: feature draw=0 sigint=0 sigterm=0 reuse=1 analyze=1 Scid : analyze Engine: feature myname="Sjeng 12.7" Engine: feature variants="normal" Engine: feature colors=1 ics=0 name=0 pause=0 done=1 Engine: Opening phase. Engine: Time for move : 999999 Engine: 2 0 0 86 Nc3 Nc6 Scid : exit Scid : force Scid : setboard r1b1r1k1/1p1n1p2/p1nBp1p1/q2pP1Np/P7/R2B3Q/2P2PPP/5RK1 w - - 0 1 Scid : analyze Engine: 2 0 0 86 Nc3 Nc6 Engine: 2 0 0 198 Nc3 Nc6 Engine: 3 33 0 323 Nc3 Nc6 Nf3 Engine: 3 33 0 323 Nc3 Nc6 Nf3 Engine: 3 33 0 361 Nc3 Nc6 Nf3 Engine: 4 0 0 518 Nc3 Nc6 Nf3 Nf6 Engine: 4 0 0 518 Nc3 Nc6 Nf3 Nf6 Engine: 4 0 0 1322 Nc3 Nc6 Nf3 Nf6 Engine: 5 28 0 2042 Nc3 Nc6 Nf3 Nf6 d3 Engine: 5 28 0 2042 Nc3 Nc6 Nf3 Nf6 d3 Engine: 5 28 0 3033 Nc3 Nc6 Nf3 Nf6 d3 Engine: 6 0 0 5224 Nc3 Nc6 Nf3 Nf6 d3 d6 Engine: 6 0 0 5224 Nc3 Nc6 Nf3 Nf6 d3 d6 Engine: 2 -69 22 212 f4 Qd2 Engine: 2 -69 22 212 f4 Qd2 Engine: 2 -68 22 605 Qe3 ! Engine: 2 -46 22 695 Qe3 Qd8 Engine: 2 -46 22 967 Qe3 Qd8 Engine: 3 -96 22 1451 Qe3 ?? Engine: 3 -95 22 3546 f4 ! Engine: 3 -62 22 4315 f4 Qb6+ Rf2 Qd4 Engine: 3 -61 22 6102 Qg3 ! Engine: 3 -51 22 6471 Qg3 Qd2 a5 Engine: 3 -50 22 7089 Nf3 ! Engine: 3 -48 22 8084 Nf3 Nc5 Qh4 Nxd3 cxd3 Engine: 3 -48 22 8366 Nf3 Nc5 Qh4 Nxd3 cxd3 Engine: 4 -63 22 9450 Nf3 Nc5 Qh4 Rf8 Engine: 4 -63 22 9450 Nf3 Nc5 Qh4 Rf8 Engine: 4 -62 22 11693 Qg3 ! Engine: 4 -40 28 14704 Qg3 Nc5 Qf4 Rf8 Engine: 4 -40 33 22480 Qg3 Nc5 Qf4 Rf8 Engine: 5 -14 33 33425 Qg3 Ne7 Qf4 Nf5 c3 Engine: 5 -14 33 33425 Qg3 Ne7 Qf4 Nf5 c3 Engine: 5 -14 39 48722 Qg3 Ne7 Qf4 Nf5 c3 Engine: 6 17 50 88516 Qg3 Nf8 Qf4 Nd8 Qf6 Qd2 Engine: 6 17 55 88516 Qg3 Nf8 Qf4 Nd8 Qf6 Qd2 Engine: 6 17 66 130051 Qg3 Nf8 Qf4 Nd8 Qf6 Qd2 Engine: 7 11 99 230684 Qg3 Ne7 Bxe7 Rxe7 Nxf7 Kxf7 Qxg6+ Kf8 Qxh5 Qd2 Qh8+ Kf7 Engine: 7 11 99 230684 Qg3 Ne7 Bxe7 Rxe7 Nxf7 Kxf7 Qxg6+ Kf8 Qxh5 Qd2 Qh8+ Kf7 Engine: 7 12 126 315231 Nxf7 ! Engine: 7 50 159 391512 Nxf7 Kxf7 Bxg6+ Kxg6 Qg3+ Kh6 Qf4+ Kh7 Qf7+ Kh6 Qxe8 Nd4 Qh8+ Kg5 Rg3+ Kh4 Engine: 7 50 181 457812 Nxf7 Kxf7 Bxg6+ Kxg6 Qg3+ Kh6 Qf4+ Kh7 Qf7+ Kh6 Qxe8 Nd4 Qh8+ Kg5 Rg3+ Kh4 Engine: 8 100 220 591967 Nxf7 !! Engine: 8 449 483 1415447 Nxf7 Nd4 Qg3 Nf8 Nh6+ Kg7 Bxf8+ Kxf8 Qh4 g5 Qxg5 Rd8 Qxh5 Engine: 8 449 483 1415447 Nxf7 Nd4 Qg3 Nf8 Nh6+ Kg7 Bxf8+ Kxf8 Qh4 g5 Qxg5 Rd8 Qxh5 Engine: 8 449 500 1454458 Nxf7 Nd4 Qg3 Nf8 Nh6+ Kg7 Bxf8+ Kxf8 Qh4 g5 Qxg5 Rd8 Qxh5 Engine: 9 499 994 2844893 Nxf7 !! Engine: 9 498 1038 2945113 Nxf7 ?? Engine: 9 513 1329 3978351 Nxf7 Nd4 Qg3 Nf8 Nh6+ Kg7 Bxf8+ Kxf8 Qh4 Re7 Qxd4 Qd2 f4 Ke8 Engine: 9 513 1329 3978351 Nxf7 Nd4 Qg3 Nf8 Nh6+ Kg7 Bxf8+ Kxf8 Qh4 Re7 Qxd4 Qd2 f4 Ke8 Engine: 9 513 1329 3978392 Nxf7 Nd4 Qg3 Nf8 Nh6+ Kg7 Bxf8+ Kxf8 Qh4 Re7 Qxd4 Qd2 f4 Ke8 Engine: 10 563 3417 10448002 Nxf7 !! Engine: 10 781 10788 30783689 Nxf7 Re7 Bxg6 Nf8 Bxh5 Nh7 Rg3+ Kf8 Bg4 Nd8 Bxe7+ Kxe7 Nxd8 Kxd8 Qxh7 Qxa4 Engine: 10 781 10788 30783689 Nxf7 Re7 Bxg6 Nf8 Bxh5 Nh7 Rg3+ Kf8 Bg4 Nd8 Bxe7+ Kxe7 Nxd8 Kxd8 Qxh7 Qxa4 Engine: 10 781 10848 30941270 Nxf7 Re7 Bxg6 Nf8 Bxh5 Nh7 Rg3+ Kf8 Bg4 Nd8 Bxe7+ Kxe7 Nxd8 Kxd8 Qxh7 Qxa4 Engine: 11 831 18719 52681148 Nxf7 !! Scid : . Engine: Engine: stat01: 31983 86573056 11 41 42 Nxf7 Scid : exit Scid : quit
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