Author: Robert Hyatt
Date: 14:44:36 07/16/02
Go up one level in this thread
On July 16, 2002 at 17:38:02, Uri Blass wrote: >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. Look out on ICC. Would you rather lose a pawn or be forced to place your knight on A1/H1 for a while? I would prefer to stick the knight on the corner, because that can be corrected later. Losing the pawn is losing the pawn, period. You can't make it come back later. > >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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