Author: ALI MIRAFZALI
Date: 13:41:08 05/17/02
Go up one level in this thread
On May 17, 2002 at 16:36:19, Roy Eassa wrote: >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. I lost my Fritz6 CD some time ago so I cant campare Chessmaster with fritz here but I remmeber from many tests that fritz6 (due to the NULL MOVE pruning does not see many sacrificial lines.Does it come with the CM 8000 line here?
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