Author: José Carlos
Date: 08:21:41 12/21/03
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On December 21, 2003 at 09:48:12, Uri Blass wrote: >On December 21, 2003 at 09:36:27, José Carlos wrote: > >>On December 21, 2003 at 08:33:22, Duncan Roberts wrote: >> >>>up to how many moves from the start of the game do we know DEFINITELY, there is >>>no material win for white. >>> >>> >>>I once saw that a program called bringer or something like that had checked the >>>first 15 moves or so. >>> >>>does anybody have more information? >>> >>> >>>Duncan roberts >> >> It was SOS, IIRC. It tried a material only eval from starting position and saw >>that 1.h3 (I'm not sure about the move) does not lose material for white in >>about 30 plies. >> For more details search the CCC archives. >> >> José C. > >How do you define material? I don't define anything, but if I remember correctly, SOS experiment was about removing all positional stuff from eval, and using only a constant value for each piece. Then use the rest of the program normally, so a mate is still a mate. I think (I'm not sure if my memory is correct) that Rudolf just set the initial position and let SOS only material search for some hours. At iteration ~30 the program was saying 1.h3 score: 0.00. That's all I recall. José C. >Does 1.f3 e5 2.g4 Qh4# lose material for white. >If you only count material the answer is negative and if you consider the fact >that capturing the king is not allowed in chess then white never has less >material in that line. > >Uri
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