Author: Dieter Buerssner
Date: 15:39:11 09/16/02
Go up one level in this thread
On September 16, 2002 at 17:32:09, martin fierz wrote:
>On September 16, 2002 at 13:59:02, Dieter Buerssner wrote:
>
>>On September 15, 2002 at 20:25:46, martin fierz wrote:
>>
>>>> 8/8/4K1p1/4PpB1/3p1P1P/5n2/4k3/8 b - -
>>I agree, with almost everything. However, I think, that typically the method of
>>the chess engine works as well. Indeed, I am partitially using ideas you
^^
The "as" should not be there.
>you are right about bf6 of course. i thought about it but you hadnt mentioned it
>in your previous post and so i just followed your mainline.
Not, that it is important, but I hash shown it in the original post, and the
last position was to find Kxf4.
>this is not the only
>winning path though, but it is very convincing.
Which would be an alternate winning path, in the line with Bf6 ?
>i agree that i wouldnt feel too good about giving huge scores, like 5 in a +8
>position. you could also try the other way round: my eval of the KNPP-KB
>position is "100% win", not +3. you could try to fix that one alternatively to
>fixing the position with the pawn on the 7th.
BTW. From another recent stupid Yace game (you can find it by clicking on the
link in the original post of this threat), a KNPPKB position:
[D] 8/8/3k4/8/5p2/2n5/pK2B3/8 w - -
Well, Yace had more than +3 in that postion :-( I am using pawn = 0.8
I should experiment with your ideas. Like you, it leaves a bad feeling to have
very high positional scores, that are not very certain. It makes the maximum
evaluation error bigger, I think, and it may cause various traps. I remember one
game of Yace vs. Crafty, where it was a dead drawn ending with rook pawn and
wrong coloured B. Crafty horribly blundered, and lost this (while happily
showing 0.0). Of course, it is a bug in the evaluation. But, if Crafty didn't
have the more sophisticated knowledge about this type of endgames (and giving
sort of high positional scores, by making the eval 0), it would have never
blundered. It would have stayed with something like -3, but drawn the game.
Cheers,
Dieter
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