Author: Vincent Diepeveen
Date: 06:04:42 01/12/00
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On January 11, 2000 at 18:14:46, Dann Corbit wrote: >On January 11, 2000 at 16:11:54, Amir Ban wrote: >[snip] >>Don't be silly. That's the end position of DB-GK game 2. Deep Blue didn't see >>the draw, and actually made the mistake of walking into this position. People >>found the draw half an hour after the game and used micros to verify it. >Not at all unlikely that I am wrong about all of them. > >At any rate, there was a thread titled "DB vs Kasparov Game 2 35. axb5" which >had computers running for days on end. I see that you were a contributor. The >other thread authors were: >Blass Uri >Bruce Moreland >Dan Homan >Dave Gomboc >Ernst A. Heinz >Ernst Walet >Eugene Nalimov >Graham Laight >James Robertson >Jeremiah Pennery >Mark Young >Michael Cummings >Peter McKenzie >Robert Hyatt >Scott Shepherd >Vincent Diepeveen >Will Singleton > >I have put all relevant messages into a zip file on my ftp directory: >ftp://38.168.214.175/pub/AXB5.ZIP > >for any who might be interested. You seem to have had some special insight on >this position, and even had access to the printouts. > >Is this position reproducable by PC's? Yes it is, for the same reason that deep blue played the Be4? (Qb6 wins as shown in numerous analysis) move. Deep Blue finds opposite bishops a big draw, even when being a passed pawn up. Combined with the fact that deep blue doesn't like a king without pawns around it (and a possible queencheck) this makes programs find axb5 without problems. The reason deep blue played axb5! is the same reason why it doesn't play Qb6! the next move. It plays Be4 because after Qb6 we get again an opposite bishops ending, but this time it's won, that's the big difference with the axb5 move.
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