Author: Thomas Mayer
Date: 16:51:00 02/22/06
Go up one level in this thread
Hi Uri, >> there is a simple rule which solves this. (Else the line is skipped to >> early by nullmove before the promotion is done) >> Rule: A lone rook can't stop two connected passers on 6th. The rook is on >> it's own when the king is too far away of the promotion fields. >> I score that as +4.something if that happens... > This rule cannot be used to solve this position because the white king is not > too far away from the promotion field unless quark understand that the white > pawn near the king increase the distance of the white king from the promotion > square. > > I wonder if Quark does not choose Rxb2 in the following position at small > depth. > [D]8/7p/5k2/5p2/p1p2P2/Pr1p1K2/1P1R3P/8 b - - 0 1 No, it does not. It does not even consider Rxb2 in your position. Another reason might be that Quark is doing promotions in qsearch... this in combination with pawn push on 7th extension might help it to find the solution so fast. Quark solves WAC #2 in ply 7... Greets, Thomas
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