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Subject: Re: WAC 141 blowup

Author: martin fierz

Date: 02:57:25 09/01/04

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On September 01, 2004 at 00:51:47, Stuart Cracraft wrote:

[snip]

Muse on P4 2.4GHz finds the mate at ply 6, failing high on Qxf4 after 0.7
seconds (not shown in the logfile).

the reason it can solve this at such a low search depth is probably twofold, the
first is that it generates checks in qsearch on the first ply of the qsearch (so
when you drop directly into qsearch with a nullmove, it will see Rh8# every
time), the second is probably that it is using mate-threat extensions.

cheers
  martin

FEN: 4r1k1/p1qr1p2/2pb1Bp1/1p5p/3P1n1R/1B3P2/PP3PK1/2Q4R w - - 0 0
depth  eval  time      nodes  kN/s  QS  BR  NR 	pv
 1/2   -165  0.11s         9    0.1 18   0   0 	g2g1 .
 2/4   -236  0.13s       113    1.0  8  80   0 	g2f1 f4d3 .
 3/7   -119  0.14s       572    4.5 10  79  48 	g2f1 e8f8 f1e1 .
 4/11  -231  0.17s      3755   27.0 20  79  64 	g2f1 a7a6 b3c2 f4e2 .
 5/15  -209  0.27s     15773   72.1 18  83  74 	g2f1 a7a5 f6e5 d6e5 d4e5 .
 6/19  31989  7.08s    979318  166. 17  80  79 	c1f4 d6f4 h4h5 g6h5 h1h5 f4h6
h5h6 c7h2 h6h2 d7d4 .



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