Author: Roy Eassa
Date: 13:28:22 05/17/02
Go up one level in this thread
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
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.