Author: Dann Corbit
Date: 13:43:22 06/15/04
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On June 15, 2004 at 16:39:30, David Dahlem wrote: >On June 15, 2004 at 16:31:22, Dann Corbit wrote: > >>On June 15, 2004 at 16:01:50, David Dahlem wrote: >> >>>On June 15, 2004 at 15:56:27, Dann Corbit wrote: >>> >>>>On June 15, 2004 at 15:45:08, David Dahlem wrote: >>>> >>>>>On June 15, 2004 at 15:33:41, David Dahlem wrote: >>>>> >>>>>>One of the problems with the current method of testing engines with test suites >>>>>>(e.g. WM-Test) is the problem of proving that the proposed solution move is >>>>>>actually the best move, especially with positions of a positional nature. >>>>>>Perhaps a new method would avoid this problem, namely a suite of mate positions, >>>>>>with known, more easily proven solutions? Time to solution could be the criteria >>>>>>by which engines are evaluated. >>>>>> >>>>>>Just an idea. Any thoughts? Would this work? >>>>>> >>>>>>Regards >>>>>>Dave >>>>> >>>>>This method would also avoid the problem of engines finding the solution for the >>>>>wrong reason. :-) >>>> >>>>The engine that performs best at these problems will be an engine like Chest, >>>>which cannot play chess but can solve mates. >>>> >>>>When the game is in doubt, is when almost all of the moves are played. If we >>>>tune for the very end, the engines will play well in that phase. But it is a >>>>tiny fraction of the game. >>>> >>>>There are many checkmate test suites. >>>>BWTC springs to mind, as an example. >>> >>>Not all checkmate problems are from endgames, many checkmates occur in the >>>middle game, even in openings. :-) >> >>The ones that occur in the openings are only going to happen to the weakest >>players. But they might make an interesting suite anyway. >> > >Yes, i agree, but that doesn't mean the solutions are necessarily easy to find. > >>I was a bit surprised to see that there are 5363 certain mates within the first >>5 plies of the game of chess (ignoring transpositions). >>ftp://cap.connx.com/pub/chess-engines/new-approach/qmates.epd > >That is surprising, thanks for the info and for the link. The file has already >been downloaded. There may be many more mates than that. Those mates listed are mates forced within 5 plies, as located by Chest. Mates deeper than that were not searched for. But certainly some will exist.
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