Author: Tom Likens
Date: 19:07:06 08/27/03
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On August 27, 2003 at 11:57:12, James T. Walker wrote: >Here is a position which came up last night while testing a beta engine. >[D]8/4k3/8/4K2p/7P/5rPb/8/6R1 b - - >It's hard to find a program that will play Rf1 forcing the rook exchange and >progressing to a tablebase won ending. Shouldn't there be some knowledge that >would tell engines to do this without searching 30 plies? I mean the bishop >covers the queening square of the black pawn which should be a clue to the win. >Jim No claims on how good my engine Djinn is (or isn't ;) but it never really considers anything but 1... Rf1 2 -3.59 1. ... Rf1 2. Rxf1 Bxf1 <HT> 3 -3.59 1. ... Rf1 2. Rxf1 Bxf1 4 -3.47 1. ... Rf1 2. Rxf1 Bxf1 3. Kf4 5 -3.58 1. ... Rf1 2. Rxf1 Bxf1 3. Kd5 Kf7 6 -.-- 1. ... Rf1 2. Rxf1 Bxf1 3. Kd5 Kf7 6 -3.33 1. ... Rf1 2. Rxf1 Bxf1 3. Kd5 Kf7 7 +.++ 1. ... Rf1!! 7 -3.54 1. ... Rf1 2. Rxf1 Bxf1 3. Kf4 Be2 4. Ke3 Bd1 8 -3.50 1. ... Rf1 2. Rxf1 Bxf1 3. Kf4 Bh3 4. Ke5 Bg4 5. Kd5 2. ... Rf1 Of course, the question is "does it understand it?" regards, --tom
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