Author: Kolss
Date: 09:05:00 01/09/03
Go up one level in this thread
On January 09, 2003 at 09:35:16, Andrew Williams wrote: >Hi, > >Last night I was looking at a game between Hossa and PostModernist. PM lost >after it took the pawn on a2 in this position: > >[D]r3r1k1/pbpp1pp1/1p3n1p/8/q1PPp3/2P1P1P1/P2BQP1P/1R2RBK1 b - - 0 19 am Qxa2 > > >How long does it take your program to ignore the Pawn here? Even after five >minutes thinking, PM still wants to take it. I suppose that your program favors white in this position, which is why it wants to take the pawn and draw. Ikarus (V0.29) favors black, so it switches to something else after just 1 second (K6/2-475MHz, 8MB Hash), after seeing that taking the pawn only draws. If I play Qxa2 (after clearing hash), Ikarus needs quite long (9 seconds / 13 plies) to see that white is winning (+1.80).I suppose that giving queens a malus when their mobility is very low is important to avoid these traps - or at least to do better when they are involved. Regards, Munjong.
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