Author: Sune Fischer
Date: 05:48:10 07/02/03
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On July 02, 2003 at 08:43:43, Djordje Vidanovic wrote: >On July 02, 2003 at 05:07:19, Sune Fischer wrote: > >> >>I'm not sure nets are really that good for chess. >> >>First of all you would need a huge NN with the capacity to remember of all these >>patterns, I mean thousands probably tens of thousands of neurons and weights. >>This would make it very slow to compute at runtime, if not using special >>designed hardware. >> >>Secondly, even if one could design a good cost function, like I suppose in >>KnightCap, what would the network learn? >> >>Well, it might learn double pawns tend to be bad, it might learn 2 rooks is >>better than 1. We already know this of course, and I think it's going to be hard >>to train the network to do better than handtuning here. >> >>The only interesting aspect would be, if the NN could teach itself some rules we >>where not aware existed. Honestly I don't think that is very likely, what is far >>more likely is that the net learns something that is wrong. >> >>When it's working for humans, I think it's because we litteraly do have billions >>of neurons, and it's not that slow because it's running in parallel. >>In spite of this our evaluation is nowhere near perfect, we aren't all world >>champions and we still need to search for tactics. >> >>-S. > >I think that KnightCap has a rather good neural net setup. The latest score, >played at 2 min for 40 moves, against The Crazy Bishop finished 35-19 for TCB. >We all know that TCB should be about 2400, even higher at fast time controls, so >I think that KnightCap must be rated now about 2300. Pretty good for a proggie >that was kicked around some 500 odd games ago. I am not saying that NN will >solve the problem of evals and be the crucial breakthrough in computer chess >programming, I am only stating that NN does have a point and that, perhaps ( a >big question mark here), just perhaps, some sort of NN learning could be >implemented in future chess engines. It is incredible to watch some of the >games it which KnightCap literally wiped out TCB using merely one third of the >allotted time... Lots of fun, try it, you will appreciate the program, I am >positive. > >Regards, > >Djordje I agree it is very exciting to study this thing :) I wasn't aware they used a NN in KnightCap, I thought they used a standard eval with some kind of board control array and then TDLeaf to train it. Maybe I should have another look at it :) -S.
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