Author: Sune Fischer
Date: 06:59:29 04/03/02
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On April 03, 2002 at 09:42:10, Uri Blass wrote: >On April 03, 2002 at 09:22:25, Sune Fischer wrote: > >>On April 03, 2002 at 08:41:22, Uri Blass wrote: >> >>>>I do not think programs has the postional knowledge of a 1400 player. >> >>Then you will be so good as to show, e.g. in Crafty, where there are evaluation >>stuff that could prevent the a4 move :) >>I see nothing in Crafty, which is know to have a lot of eval, that players above >>1400-1600 doesn't know, it is basic stuff of passed pawns, connected pawns, >>material development etc.. beginner level stuff. > >The main point is that 1400-1600 may "know" wrong things about evaluating >positions and I think that not knowing these wrong things is the main positional >advantage of Crafty relative to 1400-1600 players. You can say that, but then again the evaluation scores of crafty will also sometimes be wrong because the position is an exception from the general rules (a4 again :). The human can much more easily distinguish between the minor changes in the position that can change something from good to bad, the program just mindlessly gives a score for a rook in an open file, even if the file is completely irrelevant. Also take the piece square tables, how can they ever be as finely calibrated as the one the human uses. The human will keep changing his table scores, because in some positions a knight on g4 is better than one on e4, it takes a human to understand this (or brute force search). >A weak human may also forget about a weak pawn in the evaluation of the position >inspite of the fact that he knows in theory that weak pawns are bad. > >Something like this cannot happen to a computer. > ><snipped> >>Why would he mostly win against stronger players if the sacrifices are wrong? > >It may be a win in most cases if the 1500 opponents blunder when they have to >defend the position. > >a weak human may learn from his experience wrong things because his sacrifices >may practically work when they are objectively mistakes in most of the cases. > >Uri I don't think so, it is much more likely the 1400 player will blunder against the stronger player and lose because of the already bad sacrifice. IMO weak agressive players are easier to defeat than the ones that just go for the draw from the beginning. -S.
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