Author: Howard Exner
Date: 03:12:07 12/18/97
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On December 18, 1997 at 04:04:12, Mark Young wrote: >On December 15, 1997 at 15:00:19, Howard Exner wrote: > >>Here are some examples from the most recent SSDF test games. >> >>8/R7/P6k/1K6/5p2/r7/8/8 b - - id"Genius 5 P90 - Rebel 9 P90"; >>2R5/3K4/2P4k/8/7p/8/2r5/8 b - - id"Hiarcs 6 P90 - Rebel 9 P90"; >> >>In the above two examples Rebel went on to lose both. These are easy >>draws >>for humans who are aware of the common drawing theme of advancing your >>own pawns then sacrificing the rook for the advanced passer. Can this >>kind of knowledge be programmed? I get the impression that these >>positions >>are difficult for all computer programs. >> >>8/8/Pb1p3p/3P2kP/4K3/4pB2/8/8 b - - id"Nimzo 3.5 P90 - Rebel 9 P90"; >> >>Here Rebel 9 played Kh4 and went on to lose. Probably on faster hardware >>it would avoid such a move. But again I'm not sure if endgame knowledge >>of opposite colored Bishop endings is easily implemented. >> >>Games like these really hi-light the "idiot-savant" nature of >>computer chess programs. One minute they're brilliant and the >>next ... > > >What time control was those games played at. I put the Nimzo-Rebel9 >position in my rebel9 and it plays Kg5-f6 at 17 sec on a p II 300 so on >a p90 it should find the same move at a 1 min. or so. These were SSDF games so the time control would be 40/2. You're right that on a P90 it would be about 5 times as slow as the P11-300. These SSDF games can be downloaded on Tony Hedlund's site at http://userweb.interact.se/~tonyh/welcome.htm It is a good service to post these games in PGN as Tony does. I've been interested in computer endgame play lately so I fast forwarded the games using Rebel 8 till I reached the endgame. There were many wonderfully played endgames but I just posted the ones that looked easy for humans to solve but difficult for computers.
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