Author: Odd Gunnar Malin
Date: 23:08:01 05/02/02
Go up one level in this thread
On May 02, 2002 at 09:12:29, Gian-Carlo Pascutto wrote:
>On May 02, 2002 at 09:08:58, Ulrich Tuerke wrote:
>
>>>As for learning, I understand the learning code in the Fritz
>>>GUI's is that of Robert Hyatt.
>>
>>I doubt this very much. The learning algos, used by ChessBase are much more
>>aggressive than Robert's. If a CB engine had a win, it immediately tries to
>>duplicate the game, whereas Crafty just tries to avoid loosing lines.
>
>It's a matter of parameters. You can configure them in the CB GUI.
>
>Crafty does try to repeat games, just not as aggressively with
>the default settings. The info that Fritz uses the Crafty learning
>algo comes from Robert himself, and I see little reason to doubt it's true.
>
>--
>GCP
Hi.
Crafty only learn from his loss.
Here is a relevant thread:
http://www.it.ro/ccc_search/ccc.php?art_id=135883
And also a bit from his input routine
else if (OptionMatch("result",*args)) {
if (nargs > 1) {
if (!strcmp(args[1],"1-0")) {
strcpy(pgn_result,"1-0");
if (!crafty_is_white) LearnBook(tree,wtm,300,0,1,2);
}
else if (!strcmp(args[1],"0-1")) {
strcpy(pgn_result,"0-1");
if (crafty_is_white) LearnBook(tree,wtm,-300,0,1,2);
}
else if (!strcmp(args[1],"1/2-1/2")) {
strcpy(pgn_result,"1/2-1/2");
}
return(1);
}
}
Odd Gunnar
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