Author: Mark Young
Date: 22:51:18 12/18/97
Go up one level in this thread
On December 18, 1997 at 06:12:07, Howard Exner wrote:
>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.
Then I must ask why did not rebel9 find the move Kg5-f6 if the time
control was 40/2 on a P90. Does not Kg5-f6 draw the game. This move
should have been found on a P90 at that time control.
mark
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