Author: Thomas Mayer
Date: 11:11:40 11/04/01
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Hi Andrew, >I hope I can finally get a diagram to work :) > >[D]5q1k/8/1p3rQ1/p1p1pP1P/1pPpP2K/pP1P4/P4R2/8 w - - 0 18 > > This is an interesting position I came across. Moves like Qg3 and other > retreats can give white a minor advantage maybe from the programs point of > view, but it is not clear if there is a win. In this position Kg5! is > winning. If after Rxg6 hxg6 the pawn moves to f6 and the rook to h7 and > eventually black is in a sort > of zugswang. > Of course, for a moderately strong human kg5 can be seen in a > couple of second easily, but for computers it doesn't look so easy. What do > your favourite programs say? really complicate to discover that for programs... I played a little bit around with your position and put some moves forward, like: 1. Kg5 Rxg6+ 2. hxg6 Kg8 3. f6 Qc8 4. Rh2 Qd8 This position is now on the board: [D]5qk1/8/1p4P1/p1p1pPK1/1pPpP3/pP1P4/P4R2/8 w - - 0 3 Quark finds here Rh7 quite fast and at ply 17 this grows to over +17.xx ... So I think it will be found in initial position at ply 22-24 or so... Maybe Slater World can run a longer analysis with Crafty, I think it will it find earlier... The problem is, that the score after Rxg6 hxg6 is for Quark also positiv, but not high enough to be better then Qg5, Qg3 or whatever... A problem with blocked positions, as most chess engines have - maybe I will give Patzer a chance here, it is very good in such positions and has some knowledge others have not... Greets, Thomas
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