Author: Paul Richards
Date: 09:20:13 06/15/99
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On June 14, 1999 at 19:50:22, Paul Richards wrote: >This position is not that difficult, though there is no forced mate. >I tried three engines on a PII 400. Fritz 5.32 finds the winning line >at 13 ply plus 30 or 40 selective. Takes about 8 minutes. Crafty >chooses the right move at 14 ply, though it only gives it 12 centipawns >initially. Takes about 20 minutes, and I presume it will stay with that >and increase its evaluation. I stand corrected. I inadvertently left Crafty 16.6 chewing on the position overnight. This morning at 17 ply it gives the following pv: c4 Nf6 exf6 Qxf6 Bc3 Qh4 Rf3 f5 Na5 Nxa5 Qe5 Qg4 Bxa5 Qh4 c5 Qf6 Qxf6 Rxf6, and gives this an eval of +2.06, or 206 centipawns to white. I don't know if other programs will change their eval later, though the Bxh7+ line had a similar eval as I recall. Humans would unhesitatingly choose to destroy the opponent's king position I think, since the long term prospects are usually better. If I have time I'll let Fritz or LGGold do a longer search on the position, or perhaps someone else can crunch on it.
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