Author: Bernhard Bauer
Date: 23:52:29 02/10/98
Go up one level in this thread
On February 10, 1998 at 12:09:49, Bruce Moreland wrote:
>Cool bug. If you want to see other bugs of this type, try setting up
>positions where each side has only one minor piece, but there is a mate
>in one.
>
>For instance something like
>
>5Bbk/8/7K/8/8/8/8/8 w - - 0 1
>
Crafty gives:
White(1): Bg7#
time used: 0.18
Crafty offers a draw.
So after mating Crafty offers a draw.
>When I tried this a few years ago I found that several programs called
>this a draw. Maybe they still do.
>
Looks like you are right.
>Regarding 5-piece endgame databases, I have a whole bunch of them, but I
>don't actually use very many on ICC, since the Alpha doesn't have enough
>disk.
>
>One of the ones I put on the Alpha, almost as a lark, was KP vs KNN, and
>it has come in handy twice, which was twice more than I expected.
>
I think it's a good idea to do things in a proper way. Crippling down a
program for speed reasons may be a bad idea and may give the customers
a bad feeling. It would be better to insert a line of code like:
XXX will not handle this position properly due to speed reasons. STOP.
Here are 2 positions from V. Albillo's home page that cause difficulties
to crafty.
8/1k1K4/8/8/1pN5/1N6/8/8 w - - bm Nc5+; id "VA19: 6mate";
8/8/8/5K2/7k/7p/7N/7N w - - bm Nf2; id "VA20: 9mate";
Now I know why.
Regards
Bernhard
>bruce
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