Author: Christophe Theron
Date: 16:46:24 05/31/98
Go up one level in this thread
On May 31, 1998 at 18:01:28, Len Spencer wrote:
>The other night I happened to look at the "mate in 2" problem on the ICL
>home page, and decided to try it out on some of the programs I have.
>Needless to say I got some interesting results.
>
>The position:
>
>5QbK/r6p/2pRp1p1/2P1k3/2B1npPN/r1p1N/6P1/q1b1R1B1 w
Maybe I have something wrong somewhere, but Tiger says that Nf3 is mate
in this position... Not mate in 3 or mate in 2, but just an immediate
mate.
Can somebody check the position please?
Christophe
>First I tried Crafty, thinking it should have no problem. But it
>INSISTED on Rxe6+ mate in 3. So I tried several of the other programs I
>have to see what they would do. Here's what I found:
>
>1. (I won't give away the answer!) Programs that got it right:
> CM4000
> GNU Chess 4.14 Win32
> Cyrus
>
>2. Rxe6+ (forced mate in 3)
> Crafty 15.8
> EXChess
>
>3. Qxg8 (mate in 3)
> Sargon 4
> Grandmaster Chess (Zarkov 2.5 engine)
> EdChess 3.0.
>
>Any ideas? Is the correct move getting lopped off early in the search
>simply because it is a "waiting move"?
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