Author: Jeremiah Penery
Date: 12:21:33 04/28/05
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On April 28, 2005 at 04:44:25, Renze Steenhuisen wrote: > >Hi all... > >a few days ago, someone posted a message with a notion about "Jeremiah's Wall >Detection" (in Crafty). > >Can someone explain to me what this is, whether it works, in which cases it >works, where I can find an implementation of it, etc. These are some positions that it works on: 8/7p/6pP/k4pP1/b1p1pP2/KpPpP3/1P1P4/7Q w - - 0 1 3k4/2p1p1p1/p1P1P1Pp/P6P/4K3/8/8/8 w 8/4k3/8/p1p1p1p1/P1P1P1P1/8/2B1K3/8 w 4b3/4k3/2p1p1p1/1pPpPpPp/pP1P1P1P/P2K4/3B4/8 w - - 0 1 4k3/8/1p1p4/pPpPp1p1/P1P1PpPp/5P1P/2BB4/K7 w 8/8/8/k3p1p1/1p1pPpP1/1PpP1P2/K1P3B1/8 w - - 0 1 It will return drawscores for all of the above positions 3B4/1r2p3/r2p1p2/bkp1P1p1/1p1P1PPp/p1P1K2P/PPB5/8 w - - 0 1 Plays Ba4,b3,c4,etc., which draws and shows 0.00 score. 8/4kr1b/4p3/rp1pPp1p/pPpP1PpP/P1P3P1/2K5/8 w Does not take the rook with bxa5, which loses. 2k5/2p5/1q1p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 w - - 0 1 Doesn't play Nxb6, which is immediate draw. 7r/1k5p/2p3pP/rpPp1pP/p2PpP/P3P/1K/4B w Doesn't take Bxa5, which may allow black to win. 3k4/2p1b3/1p2p1p1/p1p1P2p/P1P3P1/1P5P/5P2/2B3K1 w - - 0 25 Probably drawing anyway, but doesn't play any of Kg2/f4/g5/h4 which are immediate draws. Here is a position where it fails, because it doesn't realize the white queen is completely imprisoned: 5k2/1q4bQ/5p1p/p1p1pPpP/2PpP1P1/Pp1P4/1P5K/5B2 b - - 0 1
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