Author: Uri Blass
Date: 13:04:09 01/06/02
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On January 06, 2002 at 15:01:35, Severi Salminen wrote: > >>Well...to begin with, "a movegenerator that allways generated the best move" is >>clearly an unrealizable pipe dream. With such a generator, there is no reason to >>search. You would generate the best move and then play it straight away. > >Yep, that's what I meant. > >[snip...] > >>The moral of the story is: The move you want to *play* should be the *best*, but >>the moves you want to *analyze* are the ones that cost you the least amount of >>work overall most of the time. >> >>Don't confuse the properties you desire in the moves you *play* with the >>properties you desire in the moves you *analyze*. They are not the same. > >The best move (as seen from engine's point of view) allways results the least >amount of work. Assuming that I also search the best reply to it and so on. No suppose that beta<0 so your engine is happy with a draw. move A is the best and give material advantage but you need to search a lot of nodes to get a cutoff. suppose that the line that your engine searched end with the moves Rc1-b1 Rd8-e8 Rb1-c1 if you search the move Re8xe1 first you get a cutoff because Re8xe1 is winning the game but you need to search a lot of nodes to get the cutoff. If you search Re8-d8 first you get immediate reptition(Rc1-b1 Re8-d8 Rb1-c1 Rd8-e8 lead to repetition of the position) so you get the cut off by only one node. Uri
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