Author: John Merlino
Date: 10:39:44 07/30/04
Go up one level in this thread
On July 30, 2004 at 13:03:39, Kurt Utzinger wrote: >On July 30, 2004 at 10:55:07, Albert Silver wrote: > >>The following position arose in a famous game between Taimanov and Karpov in >>1973. Karpov sacrificed a pawn to prevent white from pushing c4, and obtain >>excellent play against the hanging pawns using the two files. I expect that most >>of the top engines should find this move, but the amateurs should find it much >>harder. How does your engine do? >> >> Albert >> >>[D]2q2rk1/p1rn1ppp/1p2pn2/8/Q2P4/2P2N2/P2B1PPP/2RR2K1 b - - 0 17 >> >>17...Rc4! 18.Qxa7 Qc6 19.Qa3 Rc8 >> >>Here is the full game: >> >>[Event "Moscow-3teams"] >>[Site ""] >>[Date "1973"] >>[Round "2"] >>[White "Taimanov Mark E"] >>[Black "Karpov Anatoly"] >>[Result "0-1"] >>[Eco "E55"] >>[Annotator ""] >>[Source "MCL"] >> >>1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 O-O 6.Nf3 d5 7.O-O dxc4 >>8.Bxc4 cxd4 9.exd4 b6 10.Qe2 Bb7 11.Rd1 Nbd7 12.Bd2 Rc8 13.Ba6 >>Bxa6 14.Qxa6 Bxc3 15.bxc3 Rc7 16.Rac1 Qc8 17.Qa4 Rc4 18.Qxa7 >>Qc6 19.Qa3 Rc8 20.h3 h6 21.Rb1 Ra4 22.Qb3 Nd5 23.Rdc1 Rc4 24.Rb2 >>f6 25.Re1 Kf7 26.Qd1 Nf8 27.Rb3 Ng6 28.Qb1 Ra8 29.Re4 Rca4 30.Rb2 >>Nf8 31.Qd3 Rc4 32.Re1 Ra3 33.Qb1 Ng6 34.Rc1 Nxc3 35.Qd3 Ne2+ >>36.Qxe2 Rxc1+ 37.Bxc1 Qxc1+ 38.Kh2 Rxf3 39.gxf3 Nh4 0-1 >> >>In the last position, white lost on time BTW. > > I think you are overestimating today's chess programs. I > would indeed be surprised if there is a program to play > 1...Rc4 within a time limit of 15-20 minutes. Below the > analysis of Wcrafty 19.15 and Shredder 8 UCI, both on P4 1.8: Then I think you'll be surprised by your own creation. CM9_SKR on an AMD 2500 finds Rc4 in four seconds: Time Depth Score Positions Moves 0:00 1/3 0.36 1139 17...Ne4 18.c4 Nd6 0:00 1/3 0.30 1313 17...Qb7 18.c4 Rfc8 19.Qb3 0:00 1/4 0.27 2250 17...Qb7 18.c4 Rfc8 19.Bf4 0:00 1/5 0.54 8207 17...Qb7 18.c4 Qe4 19.Bb4 Rfc8 20.Bd6 0:00 1/5 0.35 10446 17...Ne4 18.c4 Nd6 19.Bf4 Rxc4 20.Rxc4 Nxc4 21.Qxa7 0:00 1/6 0.26 22012 17...Ne4 18.c4 Nxd2 19.Rxd2 Nf6 20.Re2 Rd8 0:00 1/7 0.40 68197 17...Ne4 18.c4 Nxd2 19.Rxd2 Nf6 20.Ne5 Rd8 21.Qa3 0:01 1/8 0.03 243434 17...Ne4 18.Qb3 Rc4 19.Re1 Ndf6 20.Qc2 Qb7 21.Ne5 Rcc8 0:02 1/9 0.32 540186 17...Ne4 18.c4 Nxd2 19.Rxd2 Nf6 20.Qb3 Rd8 21.Re2 Qa6 0:03 1/9 0.25 801814 17...Re8 18.Re1 Rc4 19.Qxa7 Qa8 20.Qxa8 Rxa8 21.Rc2 Rca4 22.c4 Rxa2 0:04 1/9 0.13 967732 17...Rc4 18.Qxa7 Qc6 19.Qa3 Ra4 20.Qb3 Rfa8 21.c4 Rxa2 0:05 1/10 0.01 1249952 17...Rc4 18.Qxa7 Qc6 19.Qa3 Ra4 20.Qb3 Rfa8 21.Rc2 Ra3 22.Qb2 R3a5 0:09 1/11 0.08 2238373 17...Rc4 18.Qxa7 Qc6 19.Qa3 Ra4 20.Qb3 Rfa8 21.Rc2 Ra3 22.Qb2 Qc4 0:18 1/12 -0.02 4372183 17...Rc4 18.Qxa7 Qc6 19.Qa3 Ra4 20.Qb3 Rfa8 21.Rc2 Ra3 22.Qb1 Qc4 23.Bg5 b5 0:46 1/13 0.04 11708431 17...Rc4 18.Qxa7 Qc6 19.Qa3 Ra4 20.Qb2 Rfa8 21.Rc2 h6 22.Re1 b5 23.Bf4 Nd5 1:53 2/14 -0.02 29405172 17...Rc4 18.Qxa7 Qc6 19.Qa3 Ra4 20.Qb2 Rfa8 21.Rc2 Ne4 22.Bf4 b5 23.Qb3 Rc8 24.Bd2 jm
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