Author: Mike Hood
Date: 21:11:41 12/20/03
Go up one level in this thread
On December 20, 2003 at 14:54:18, William Penn wrote: >On December 20, 2003 at 14:06:10, Eran Karu wrote: > >>I am looking for any chess engine that gives most accurate long-time analysis. >> >>I wonder which one here: >> >>Fritz 8 >> >>Shredder 7 >> >>Junior 8 >> >>Rebel 12 >> >>Crafty 19.8 >> >>Any other chess engine >> >>Thanks, >>Eran Karu > >Any of them except Shredder 7.04, which gives the worst analysis I've ever >encountered since I started using chess software almost 20 years ago. It is >absurd, and there must be a bug. Only the first move can be trusted, nothing >beyond that. Yes, Shredder 7.04 does have a bug which makes it useless for analysis. For instance, look at the following: [D] 3r2k1/1pp2ppp/3r4/1P1npq2/3n4/3PPP2/1BQ1BP1P/2RR3K w - - 0 1 Analysis by Shredder 7.04: 1.exd4 Rh6 2.Qd2 Qh3 3.Qa5 exd4 4.Rg1 Qxh2# ± (0.87) Depth: 9/28 00:00:01 257kN 1.exd4 Rh6 2.Rg1 Nf4 3.Rg3 Qh5 4.h3 Nxh3 5.Kg2 Nf4+ 6.Kf1 Qh1+ 7.Rg1 Qh3+ 8.Ke1 Qh2 9.Rg5 Qh1+ 10.Kd2 ² (0.50) Depth: 9/31 00:00:05 760kN 1.exd4 Rh6 2.Rg1 Nf4 3.Rg3 Qh5 4.h3 Nxh3 5.Kg2 Nf4+ 6.Kf1 Rg6 7.Ke1 Ng2+ 8.Rxg2 Qh1+ 9.Bf1 Rxg2 10.dxe5 ² (0.42) Depth: 10/32 00:00:09 1388kN 1.exd4 Rh6 2.Rg1 Nf4 3.Rg3 Qh5 4.h3 Qxh3+ 5.Rxh3 Rxh3+ 6.Kg1 Rd6 7.dxe5 Rg6+ 8.Kf1 Rh1# = (0.17) Depth: 11/34 00:00:14 2135kN 1.exd4 Rh6 2.Rg1 Nf4 3.Rg4 Qh5 4.Kg1 Qxh2+ 5.Kf1 Qh1+ 6.Rg1 Qxg1+ 7.Kxg1 Rdd6 8.Qd2 Nxe2+ 9.Kf1 Nxc1 10.Qe2 Nxe2 ³ (-0.32) Depth: 11/43 00:00:23 3661kN 1.exd4 Rh6 2.Rg1 Nf4 3.Rg4 Qh5 4.Kg1 Qxh2+ 5.Kf1 Qh1+ 6.Rg1 Qxg1+ 7.Kxg1 Rdd6 8.dxe5 Rdg6+ 9.Kf1 Rh1# ³ (-0.57) Depth: 12/44 00:00:37 5712kN 1.exd4 Rh6 2.Rg1 Nf4 3.Rg4 Qh5 4.Kg1 Qxh2+ 5.Kf1 Qh1+ 6.Rg1 Qxg1+ 7.Kxg1 Rdd6 8.dxe5 Rdg6+ 9.Kf1 Rh1# µ (-1.07) Depth: 12/44 00:00:43 6598kN Note that in the first line and the last two lines Shredder presents lines that lead to Mate, and yet the evaluation is only 0.87, -0.57 and -1.07 respectively.
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