Author: John Merlino
Date: 11:22:06 07/24/03
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On July 24, 2003 at 12:10:41, Mihaly Szalai wrote: >John, > >thank you for the explanation. > >I just thought of this because my CM rating is quite >unreal this way - and since there's no position learning >and randomness is zero, CM default pers. won't improve in >this line. > >I don't think that adjusting the cfd value would be a great >risk for the engine against a weaker player. If I'm a 2100 >player most probably I will be the first to blunder, not >the engine - even if I have a 0.30 - 0.70 edge at some point >of the game. > >I used to play in the Hungarian Team Championship and when I >met a player 100-200 Elo stronger than me, I offered a draw >quite frequently but they never accepted it, thinking they >are the better chessplayers and they will 'outplay' me sooner >or later, so I had to fight until 2 kings - what is the right >way in serious games IMO. As I mentioned, Johan and I discussed this, but not in very much detail. He seemed to think it was a good idea, which means he probably thought it through very well before commnenting on my idea. Therefore, you are probably right in saying that, in most cases, adjusting the cfd value depending on rating difference will probably not hurt the engine SIGNIFICANTLY. However, since the search is noticeably altered by this one change, it is really difficult to say without a lot of testing. >As for the book lines: CM uses several opening books automatically >(quite unique in the compchess world!). There should be books with >no drawish, sharp lines against weaker players. I'm not sure what you mean by "CM uses several opening books automatically". Each personality uses only one opening book -- whichever one it is told to use. The "CM9000.OBK" book is rather eclectic, in that it knows about lots of openings, and is very democratic about all of them. It was designed to be able to play the most POPULAR lines, and not necessarily the lines that are best for The King. jm
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