Author: Ilya P. Kozachenko
Date: 06:08:12 08/28/98
Go up one level in this thread
On August 28, 1998 at 08:20:03, Alessio Iacovoni wrote: >On August 28, 1998 at 07:32:07, Ilya P. Kozachenko wrote: > >> >>On August 28, 1998 at 03:02:02, Alessio Iacovoni wrote: >> >>>On August 28, 1998 at 01:18:14, Jeff Anderson wrote: >> >>BTW, how you would decide, which move - produced by tactical or positional >>engine - it's better to select ? >>It was the point, when discussing of the same idea I posted, finished. > >Ok... the tactical engine comes up with it's best line which it believes will >give it a +0.60. The line (say 10 plies) are passed on to the positional >"blunder check" engine which determins if that line would bring to a postional >weakness.. (doubled pawns for example).. if it would, then it subtracts the - >value of doubled paws (I dont know how much) from the positive value of the >tactical engine (+0.60 - 0.60 for example = 0 so the line is not satisfactory). >The process is repeated as many times as possible untill a line is found which >will reach the highest overall value (tactical and strategical). The >coefficients could be weighted in such a way as to give more importance to the >tactics (I would give tactical value at least 50% more importance than >position... but that has to be decided with trial and error).... In such a way >very strong tactical lines would pass even though they receive a negative value >from the blunder check module (a checkmate +99.9 for example would pass >regardless of the - value attributed by the blunder check module). It seems very >simple to me. Yes, it's simple, but there is not the same idea you first published, it's other - and in another words, it is implemented in every chess program ! How, you ask ? That positional subtraction you propose for, say, doubled pawns PERFORMED IN EVAL.FUNCTION on each ply and every position and built-in into final result by minimax itself. You described another way of doing the same things and I am not sure it would be better. But the first idea, as I say earlier, and btw, researched by J.Schaeffer in his M.Sc. thesis, looks promising and only selection phase is a pin. Please, read archives of 3-4 August, if not read yet, it will be easier to understand each other for us.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.