Author: blass uri
Date: 17:05:28 04/13/00
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On April 13, 2000 at 18:00:45, Trefor Deane wrote: >On April 13, 2000 at 17:00:11, blass uri wrote: > >>On April 13, 2000 at 15:57:46, Colin Frayn wrote: >> >>>>>If it can't then it's not playing chess and you could sue the authors for >>>>>claiming that it's a chess program. *grin* >>> >>>>It would play chess. As long as it does not play an illegal move, it plays >>>>chess. You can play chess even if you can't underpromote. >>> >>>Not true. The rules of chess state that you are allowed to underpromote. >>>Provided it allows _opponents_ to underpromote then it's OK, but if it doesn't >>>then the game it's playing isn't chess, but some simpler variant. >> >>Junior5 allows the opponent to underpromote and the problem was only that it >>does not consider underpromotion in the search. >> >>Uri > >I just discovered that my Sapphire II doesn't consider an opponents possible >underpromotion as well! Tested on the Mate in 8 problem, posted about a week ago > >Trefor. You used the wrong position. many top programs need a long time to see the mate in 8 because the mate is too deep for them. The right position to test if a program considers underpromotions is this position: [D]7n/3q1P1k/4BK1p/8/8/8/8/8 w - - 0 1 Junior5 cannot see it. Uri
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