Author: Mark Young
Date: 15:50:55 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 > >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"? Many programs and humans do this. If you find a mate in x moves. Why keep searching for a shorter mate. There are many good, pure mate engines out. If you need to have a program that finds the shortest mate.
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