Author: Komputer Korner
Date: 10:50:11 11/24/98
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On November 24, 1998 at 08:25:18, Micheal Cummings wrote: >I refer to CM6000, in the settings for the personalities where you can set a >random setting, which will make CM6000 play more interesting moves. > >Just imagine deep blue making an irregular move, then using its power to >calculate its way out of it. Just like some humans, making strange moves to >confuse the other player. > >Imagine if a computer was playing a strong games and all of a sudden pulled off >a strange move, you would sit there and think, well it either stuffed up, or it >has seen a line of play which you have not seen. > >I tried the Random setting on CM6000 up full, and its very strong, and you sit >their and think, and get very confusing sometimes just to how strong a game it >is actually playing. > >Well Just a thought, then it would be harder to make killer lines and killer >themes against programs. > >I might be talking crap, and maybe this could never produce good games against >strong humans. But I remember a World Champion called Mikhail Tal, that would >make moves and sacrafices which was not always the best, but what he thought >would confuse the opponent out of the game. If there are an average of 25 moves in any one position and there may be more than that then a completely random choice would see a blunder 80% of the time. A sure way to quickly losing. With Alpha Beta there is no way to tell the score of the 2nd to nth best moves, so the only way to implement a minimum score is to set an alpha locked at some minimum score. Then you could randomize from the available moves above that minimum.However if you do this you could get to a position where you have no valid moves and thus you would have to release the alpha lock. This would happen quite often if alpha is set too highly, but let us assume that you lock alpha at +.01 of a pawn, then all the times that the engine's side is actually worse, would result in repeated searches ( one with alpha locked and the other with alpha unlocked). This would weaken the program against equal strength competitors by at least 30 points. However it would work against inferior opposition. This is like the Junior 5 Threshold feature but Junior 5 allows it only in analysis mode. -- Komputer Korner
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