Author: Dann Corbit
Date: 16:56:11 10/11/05
Go up one level in this thread
On October 11, 2005 at 19:52:46, chandler yergin wrote: >On October 11, 2005 at 19:43:59, Michael Yee wrote: > >>On October 11, 2005 at 17:46:02, chandler yergin wrote: >> >>>I apologize if I have offended anyone. >>>A case of "Apples & Oranges" again.. >>>Misunderstandings.. >>>Stephen, and a few others here, know I seldom voice "Opinions"; >>>I Post facts.. >>>That way... if someone differs from the Post, they should attack the Fact, >>>not the Poster. >>>It doesn't always work that way... >>>Everything I have Posted about Computer Chess Programs..I gave the Link >>>Everything else I have Posted about Engines, Analysis Modules, is directly >>>from the Chessbase Manual. It therefore refers to the Top Commercial >>>Programs only.. Fritz, & Shredder >>>Many of you that Program your own Engines 'tweak' them as you desire, >>>and have a lot of fun. >>>Players mostly use the Top Commercial Programs to assist in their play >>>and improve their expertise. >>>Thanks to a recent Post by Dan H. some of the confusion has been cleared up. >>>Chessbase does use Mini/Max and so does indeed search every legal move >>>for every position. >>>So the "Apples & Oranges" now are just the difference between the Top >>>Commercial Programs and the others. >>>I find it very intersting that some of the 'lesser' Engines are really >>>kicking Butt! Congrats to all! Keep it up... >>>A Swift Kick only hurts for a little while.. >>>;) >>>Chan >> >> >>The posts from Dan don't say that chessbase uses minimax and searches every >>legal move for every position. > >I know he didn't say it.. I said it! > > In fact, he said something almost the >>opposite--that if a program worked that way, it would be crushed. > >Just plain wrong..sorry. >> >>You actually supplied evidence of the answer in one of your other posts (where >>you provide a description of the analysis output). The analysis window reported: >> >>search depth = 12 (selective depth 40) >>positions searched = 4.2 x 10^7 > >I was using an example.. the type of info the Analysis Module window shows. > >> >>If the analysis module really searched every position up to depth 12 >>(approximately 20 moves, 20 replies to each of those moves, 20 replies to each >>of those replies, etc.), then it would have searched >> >>20^12 = 4.1 x 10^15 positions >> >>This is way more than what was reported in the analysis window. (And the 20 is a >>very low estimate of average moves per position anyway.) Instead, >> >>4.32^12 = 4.22 x 10^7 >> >>shows a branching factor that's more like 4--i.e., the program was not searching >>every move in every position. >> >>Michael > Michael, Please read the Chessbase Manual! >Do you have Chessbase? Do you have Fritz or Shredder? >If so Start the engine look at the Analysis Window as I have requested. >You will find what I said. EVERY Legal move in the position is evaluated. >It's the way it works. Like it or not. Every legal move from the root node. That's usually about 20.
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