Author: Dave Gomboc
Date: 19:11:17 05/29/02
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On May 25, 2002 at 23:22:44, Robert Hyatt wrote: >On May 25, 2002 at 11:37:14, Vincent Diepeveen wrote: > >>On May 24, 2002 at 21:24:38, Robert Hyatt wrote: >> >>Article about deep blue. June 2001, written by Murray Campbell, >>Feng Hsiu Hsu and Hoane. >> >> "the opening book was written by GM Joel Benjamin with >> assistence of Nick de Firmian and John Fedorowicz and >> Miguel Illescas. The book consisted of about 4000 positions >> and every position had been checked by Deep Blue in >> overnight runs." >> >>behind that there was an automatic generated book consisting >>out of 700000 PGN games. >> >>So so i conclude 4000 hand given in moves. That's pretty little >>for a tournament book, but was very common in 1997. > >I conclude several million moves, with 4000 specially selected moves in >key positions... This is the way they always did their book. It is the >same way we always did our book too. Play a "big book move" unless there >is a "guidance move" that overrides that. 4000 hand-entered moves (absolute priority -- play this!) The "extended book" feature used the ton of prior GM games. >>So Nxe6 was NOT given in by a GM obviously. Chance is zero >>it was in tournament book. 4000 hand given in moves is >>real little and for sure didn't have a weird and stupid >>Caro-Kann line inside it (apart from that Kasparov never >>plays caro-kann also that he would play h6?? is unlikely). >> >>So Nxe6 came out of automatic generated PGN, and was NOT given >>in by any GM. > >I agree... I asked once and was told that Nxe6 was the last hard-coded move in that line. DB did play a couple more moves quickly, based on the extended book. I can't remember which team member told me that. Dave
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