Author: Robert Hyatt
Date: 07:32:54 11/14/98
Go up one level in this thread
On November 13, 1998 at 18:33:19, Amir Ban wrote:
>On November 13, 1998 at 11:40:21, Tony Hedlund wrote:
>
>>Junior5 P200MMX 64 - Comet32 P90 16 17.5-2.5
>>
>>After leaving the book, Junior immmediatly makes a repetition draw.
>>Boring and a bad idea(Junior loosing points). It's time to exclude this line?
>>
>>[Site "Lulea"]
>>[Date "1998.11.07"]
>>[Round "2"]
>>[White "Comet32 P90 16"]
>>[Black "Junior5 P200MMX 64"]
>>[Result "1/2-1/2"]
>>[ECO "C89"]
>>[Annotator "Tony Hedlund"]
>>[PlyCount "50"]
>>[EventDate "1998.11.06"]
>>
>>{45056kB, Jun-book.ctg=351287 pos
>>} 1. e4 {0} 1... e5 {0} 2. Nf3 {3} 2... Nc6
>>{0} 3. Bb5 {3} 3... a6 {0} 4. Ba4 {3} 4... Nf6 {0} 5. O-O {3} 5... Be7 {0} 6.
>>Re1 {3} 6... b5 {0} 7. Bb3 {3} 7... O-O {0} 8. c3 {3} 8... d5 {0} 9. exd5 {3}
>>9... Nxd5 {0} 10. Nxe5 {3} 10... Nxe5 {0} 11. Rxe5 {3} 11... c6 {0} 12. d4 {3}
>>12... Bd6 {0} 13. Re1 {3} 13... Qh4 {0} 14. g3 {3} 14... Qh3 {0} 15. Be3 {3}
>>15... Bg4 {0} 16. Qd3 {3} 16... Rae8 {0} 17. Nd2 {3} 17... Re6 {0} 18. a4 {3}
>>18... Qh5 {0} 19. axb5 {3} 19... axb5 {0} 20. Qf1 {3} 20... Bh3 {0} 21. Qe2 {
>>out of book 399} 21... Bg4 {0.00/16 320} 22. Qd3 {63} 22... Bf5 {0.00/15 274}
>>23. Qe2 {120} 23... Bg4 {0.00/17 483} 24. Qd3 {2} 24... Bf5 {0.00/16 538} 25.
>>Qe2 {2} 25... Bg4 {0.00/17 459} 1/2-1/2
>
>Whenever you come out of book with negative score, you risk that the game will
>end in a quick repetition, if the opponent wants to. I don't think it's possible
>to guarantee a positive score for all book lines.
>
>Putting a contempt factor solves this, but Junior doesn't know the opponent in
>SSDF and plays without contempt. A possible solution is to always do contempt a
>few moves out of book, but that's a bit risky.
>
>Thanks for pointing it out.
>
>Amir
Another solution that works: dynamically adjust the "contempt factor" so that
right out of book, draw = -.6 or some such... I ran into this many times on ICC
where I would watch crafty play a nice gambit line, then quickly go for the
draw rather than playing on to reap the benefits of the gambit. For the first
part of the game, I drop the contempt quite dramatically, then in the late
middlegame not so much, until when I reach the endgame it is back to the default
as I don't want to accept serious weaknesses when it might well lose the game.
At least, doing this, I can play the king's gambit without worrying about a
20 move draw (of course, if the score drops below -1.00, I'm in trouble again
as I don't let the draw score drop below that (it varies from -1.00 to 0.00 as
the game "ages")...
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