Author: Andrew Williams
Date: 16:50:53 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.
My program likes this after 29 seconds on an Athlon 1200:
7> -3 1 149302 1...Ng4 2.Bxe4 Nxh6 3.Nc4 Bc7 4.Qd3
7= 7 1 167623 1...Ng4 2.Bxe4 Nxh6 3.Nc4 Bc7 4.Qd3
8> 7 1 194978 1...Ng4 2.Bxe4 Nxh6 3.Nc4 Bc7 4.Qd3
8= 26 2 396613 1...Ng4 2.Nxg4 Qxg4 3.f3 Qh5 4.Bf4 Bxf4 5.Nxf4
9> 6 7 1118579 1...Ng4 2.Bxe4 Nxh6 3.Nc4 Bc7 4.Qd3 Ng4 5.Qf3
9= 14 8 1297469 1...Ng4 2.Bxe4 Nxh6 3.Nc4 Bc7 4.Qd3 Qe7 5.Bf3
10> -27 27 3843319 1...Ng4 2.Nxg4 Qxg4 3.f3 Qh5 4.Bf4 Nf6 5.g4 Qh4
10b -22 29 4161963 1...Nxf2 2.Kxf2 Rxe3 3.Kxe3 Ng4 4.Kd2 Nxh6
10= -17 30 4434952 1...Nxf2 2.Kxf2 Rxe3 3.Kxe3 Ng4 4.Kd2 Nxh6
5.Kc1 Ng4 6.h3
11> -24 53 7476167 1...Nxf2 2.Kxf2 Rxe3 3.Kxe3 Ng4 4.Kd2 Nxh6
5.Kc1 Ng4 6.Bh3 a5 7.Bxg4 Qxg4
11= -18 53 7507452 1...Nxf2 2.Kxf2 Rxe3 3.Kxe3 Ng4 4.Kd2 Nxh6
5.Kc1 Ng4 6.Bh3 Re8 7.Bxg4 Qxg4
12> -18 59 8353631 1...Nxf2 2.Kxf2 Rxe3 3.Kxe3 Ng4 4.Kd2 Nxh6
5.Kc1 Ng4 6.Bh3 Re8 7.Bxg4 Qxg4
NODES per second 141900
Andrew
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