Author: Gian-Carlo Pascutto
Date: 04:27:20 04/15/02
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On April 15, 2002 at 03:35:07, Slater Wold wrote: >[D]2r4k/1p3p1p/1pn2q2/1N1p1p2/8/PP2Q2P/5PP1/2R3K1 w - - 0 26 > >Why in this position is it not perfectly clear that taking the pawn (Qxb6) is >the obvious move? Instead I've noticed several programs wanting Qf4, a4, and >other moves that to me, just seem to waste time. > >I've spoken with one GM, (2550ish) and he agreed that Qxb6 is the only move that >he would emphasize on. (It was a quick discussion, no detail.) > >This is move 26 of game one in the first match between Deep Blue and Kasparov. >Deep Blue played Qxb6 and later won the game. > > > >**I've tested only a few "top commercial" programs. Most want Qf4, a4 and >others at first, and around 1:30 want Qxb6. My question was, why isn't this >obvious from the start?** A program with a speculative evaluation might think, gee, after the pawn capture, black's attack might just work! So better not grab it. A program with a nonspeculative evaluation might think: Donuts! Yummy! Eateateat. So, all those 'great attackers/new padadigm-whatever programs' will now fail to simply win a pawn. This is the other side of all those speculative wild attackers. It works both ways. -- GCP
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