Author: Ricardo Gibert
Date: 18:35:51 12/21/03
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On December 21, 2003 at 11:21:41, José Carlos wrote: >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. So trading a Queen for a pawn is an even trade? > 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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