Author: Jeff Hlywa
Date: 13:52:58 07/23/03
Go up one level in this thread
On July 23, 2003 at 15:24:18, Matthew White wrote: >[D]8/5p1k/6pp/8/q2QB3/2K4P/1p3P2/8 b - - 0 45 > >From Levin (2331) - IM Donaldson, Western States Open 2003 (analysis) >The move actually played was 45... Qa1? 46. Bxg6+!! and draw by perpetual check >Can your engine find the winning 45... b1=N+!! 46. Bxb1 Qa1+ and black enters >the endgame a pawn up > >Every engine that I have tested finds it eventually. However, some do take >longer than others :). > >Matt Bogo 0.5 finds this easily: ply | score | time | nodes | qnodes | pc 1 | -0.87 | 0.00 | 26 | 47 | Qxd4+ 2 | -0.74 | 0.00 | 217 | 259 | Qxd4+ Kxd4 f5 3 | 1.10 | 0.00 | 836 | 952 | Qa1 Kc4 b1=Q 4 | 1.10 | 0.03 | 5436 | 6391 | b1=N+ Bxb1 Qa1+ Kc4 Qxb1 5 | 1.10 | 0.06 | 15371 | 16146 | b1=N+ Bxb1 Qa1+ Kc4 Qxb1 6 | 1.10 | 0.55 | 101185 | 105567 | b1=N+ Bxb1 Qa1+ Kc4 Qxb1 f4 f5 7 | 1.10 | 1.46 | 366653 | 346604 | b1=N+ Bxb1 Qa1+ Kc4 Qxb1 f4 f5 8 | 1.10 | 20.96 | 3779924 | 3733300 | b1=N+ Bxb1 Qa1+ Kc4 Qxb1 h4 h5 Kb4
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