Author: Roy Eassa
Date: 13:36:19 05/17/02
Go up one level in this thread
On May 17, 2002 at 16:34:33, ALI MIRAFZALI wrote: >On May 17, 2002 at 16:28:22, Roy Eassa wrote: > >>On May 17, 2002 at 15:58:53, ALI MIRAFZALI wrote: >> >>>The following position happened in the game GM Cifuentes vs IM Zvjaginsev >>>(1995) >>>[D]3rr1k1/1b1q1p1p/p2b1npB/2pP4/1p2n3/4N1P1/PPQ1NPBP/R2R2K1 b >>>here the GM resigned after 24...Nxf2!! 25.Kxf2 Rxe3!! 26.Bxe3 Ng4+ 27.Kf3 Nxh2+ >>>28.Kf2 Ng4+ 29.Kf3 Qe6! 30.Bf4 Re8! 31.Qc4 Qe3! 32.Bxe3 Rxe3+ 33.Kxg4 Bc8! >>>34.Kg5 h6+! 35.Kxh6 Re5! >>>There are many alternative defences all of which fail .On a 700 MHz PC >>>it takes CM8000 3 minutes and one second to see the two peice sacrafice. >>>Time:3:01 Depth :10 Score :0.34 Positions:13571609 >>>Moves:Nxf2 Kxf2 Rxe3 Bxe3 Ng4+ Kf3 Nxh2+ Kf2 Ng4+ Kf3 Qe6 Bf4 Bxd5+ >>>Really CM considers this at ply 8 then changes its mind to Ng4 at ply9 and >>>finally finds 24...Nxf2!! at ply 10 at 3:01 and stickes to it. >>>Many programs have a hard time finding this for example my program Hiarcs 3 >>>(from 1994) does not see this after even a very long think.My guess is that >>>the chessbase programs wont do good in this position.Please indicate your >>>result. >> >> >>Some analysis: >> >>1...Nxf2! 2.Kxf2 Rxe3 3.Bxe3? >> >> [3.Kxe3 Ng4+ 4.Kd2 Nxh6 5.Kc1 Qe7 =+] >> >>3...Ng4+ 4.Kf3 Nxh2+ 5.Kf2 Ng4+ 6.Kf3 Qe6 7.Bf4 >> >> [7.Bc1 h5! 8.Nf4 >> (8.Qe4 Qxe4+ 9.Kxe4 Nf2+ -+) >> 8...Bxf4 9.gxf4 Rxd5 10.Kg3 h4+ 11.Kxh4 Ne3-+] >> >> [7.Bg5 f5 8.Qd3 c4 9.Qd4 >> (9.Qxc4 Bf4! 10.Bxf4 Rxd5 mates) >> 9...Bc5! 10.Nf4 >> (10.Qxc5? Qe4 is mate) >> 10...Bxd5+ 11.Nxd5 Rxd5 -+] >> >>7...Re8 8.Qc4 Qe3+! forces mate: 9.Bxe3 Rxe3+ 10.Kxg4 Bc8+ 11.Kg5 h6+ 12.Kxh6 >>Re5 and mate next >Roy >what program are you useing? I analyzed using myself and with the help of Fritz 6. (Going up and down branches manually...) Was not trying to get the computer to solve the problem, only to help me analyze to see the truth of the position as well as possible in limited time.
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