Author: Uri Blass
Date: 11:18:04 05/28/02
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On May 28, 2002 at 13:17:57, Albert Silver wrote: >On May 27, 2002 at 14:02:47, Uri Blass wrote: > > >I don't understand the purpose of changing the first move because of a loss. >This implies that the first move was the cause of the loss, when it could easily >(probably) been due to an error much later. If I play a wrong move in an Evans >Gambit and lose because I didn't see far enough, does that mean the fault was >1.e4? > >If the plan is to learn from previous moves, I would imagine that if a time >control and the conditions (memory + CPU, etc.) is the same then it should play >the same first move instantly, presuming that identical conditions will produce >identical result, and then begin calculating again. The actual learning, to >rpevent repetition, should logically appear just before the move where the >evaluation dropped. Perhaps the program could be requested to begin studying the >first two moves prior to the drop in greater depth. Example, if the eval dropped >at move 6, then begin calculating at move 4 the same move, checking the log for >the last depth achieved, and requesting the program go one ply deeper to see if >it can detect the error. If no changes are found, then when it reaches the move >prior to the eval drop, it will of course exclude the losing move though >retaining the evaluation. Of course the request must respect the time control >algorithms. Finally, the reason the first move alone should be played instantly, >and not all the first moves before the perceived error, is that once it plays >one move instantly, the time left changes, and this means that the next move may >change now that it has more time to spend on its remaining moves. > >I should point out that I have no real knowledge of how learning is done >nowadays, so it is essentially speculation. > > Albert The possible problem that I can imagine is that the program gets a position that it does not understand and the real error is not 2 or 4 plies before the eval drop but 10 plies before the eval drop. Uri
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