Author: Dann Corbit
Date: 17:14:08 05/09/00
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Here is an interesting result from ColChess: Test #1 : White to play Current Position ---------------- r . . . . . k b p . q b p p . . pP=Pawn . . . p . n p B rR=Rook . p . . . . . . nN=Knight lower=Black . . r . P . P . bB=Bishop CAPS=White . N N . . P . . qQ=Queen P P P Q . . . . kK=King . . K R . . . R Thinking 2 29 631 8571 c1b1 d7c6 3 34 1793 23935 c1b1 f6g4 f3g4 4 21 12338 219453 c1b1 a8b8 d2f2 e7e5 5 28 52052 954030 c1b1 a8b8 d2d3 f6h7 h6d2 6 27 346014 6589450 c1b1 b5b4 c3e2 a8b8 e2d4 c7b7 7 29 1020886 17474754 c1b1 b5b4 c3d5 f6d5 d2d5 c7c6 d5d3 8 31 9999194 184613199 h6g5 d7c6 c1b1 a8b8 b3d4 c6e8 d2h2 h8g7 ---Answer: Bf8 ~Incorrect-?? The thing that is interesting about it is that ColChess does not use NULL move pruning. Hence, the inability to find the right answer cannot be blamed on Zugzwang positions somewhere in the search tree up to ply 8.
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