Author: Uri Blass
Date: 14:38:02 07/16/02
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On July 16, 2002 at 16:52:33, Robert Hyatt wrote: >On July 16, 2002 at 14:32:57, Russell Reagan wrote: > >>On July 16, 2002 at 11:07:10, Robert Hyatt wrote: >> >>>However, with _no_ book you leave yourself open for preparation of traps. I >>>saw Ken Thompson do this to NuChess years ago at an ACM event. You don't want >>>to leave that kind of "hole" for a major event... >> >>Was it a trap set specifically for that engine? Or was it just a general trap >>that many engines fall for when left on their own? >> >>Russell > > >Sort of both. > >1. Ken knew which opening Nuchess would play, as ken was white and they >had a pretty narrow book. He simply added a line that made them go out of >book pretty early, with a classic trap where they gave up a piece to win >the rook at a1, and thought they were winning an exchange and losing a pawn. >In reality, they lost both pieces plus the pawn, and the game. It is not going to work against Movei even in bullet. Movei evaluates black knight at a1 as clearly less than a knight in normal squares and the difference in evaluation is slightly more than a pawn. It means that movei is going to see it as a bad deal[winning an exchange for losing more than 2 pawns(one of the pawns is material and more than a pawn is positional bonus)]. When you know the opponent playing with small book is dangerous but when you do not know the opponent a big book becomes less improtant. If you do not do your program public in the months before the event then the opponents will have problems to prepare trap against a small book that they do not know and can be changed between the games. Uri
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