Author: Lyn Harper
Date: 16:30:17 06/12/03
[D]7k/1p6/1P2p3/1P2P3/4P1p1/6P1/8/K7 w
The only program I've had that will announce a mate in this position is
Ruffian, on an Athlon 2400. In these type of positions big hash tables come
into play, since only kings can move. Also note the black king can't get into
white half of the board, although the white king can get through.
I jacked up the hash to 200mb.
It's an exercise in related squares, from "How to Play the Chess Endings",
by Eugene Znosko-Borovsky.
Ruffian announced mate in 30,then went off the mate claim, only to come back
and stick to it at depth 60. That's quite a full width depth for a program. The
selective depth was 63.
As I remember, it took 8mins to announce the mate.
Future versions of Ruffian might not be free.
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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