Author: Uri Blass
Date: 09:11:24 01/09/03
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On January 09, 2003 at 12:05:00, Kolss wrote: >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. I think that Ikarus is relatively fast in finding after Qxa2 that white can win so saying that it needs quite long is not correct. I guess that movei will be also faster after I implement the right extensions and I know what extensions I need to implement. Uri
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