Author: Colin Frayn
Date: 11:56:21 04/16/00
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>>Here is a brilliant little problem that a friend of mine came up over 10 years >>ago that we have tried on countless chess progams and none have ever figured >>this out. I tried it on Fritz 5.32 with 64 meg hash tables overnight and it blew >>up at the 41st ply !! >>Here is the FEN > >[D]6bn/2k2prq/5prp/5pbn/5p1p/1Kp2PpP/2P3P1/8 w - - 0 1 > >This position is illegal position because there are 7 black pawns that could >never be in a-b files. > >programs do not need to know to play illegal positions The principle of the problem is very sound still, and it just happens to be extremely well illustrated by this position. Chess programs are incredibly bad at spotting obviously trapped and useless pieces. I'm sure a legal position could be invented with an extemely similar theme. Cheers, Colin
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