Author: Dieter Buerssner
Date: 12:11:08 05/10/05
Go up one level in this thread
On May 10, 2005 at 14:52:58, Mihaly Szalai wrote:
>Yace is the best engine in endgames, obviously you have some secret others
>don't know about...
Thanks! It depends very much on the position. In Paderborn 2003 Yace lost an
endgame vs. Fritz horribly - it could have rather easily got a draw. There were
several bad moves in the endgame in that game. Fritz really was better - not a
big surprise, of course. But getting a draw vs. Fritz with black in an important
game would have been nice. (Yace was very lucky in that tournament, and could
win an even endgame against Shredder later with a rather surprising move.
Analysis has shown, that Shredder could still have got a draw by some rather
complicated fortress setup. Probably not solvable by any current engine.) I
think, it could draw the Fritz game now. But many of the top engines will play
many endgame situations better (probably excluding "pure" pawn endgames - pure
in the sense, that it is not really a queen endgames in a few moves).
I doubt, I have many secrets. Actually I have reported many of my ideas (that
can help in endgames) here.
In you position, with 5-men TBs and after only 2 minutes of backwards analysis,
I get:
1930 0.040 Mat21 13t 1.Rgf8 Qa5 2.Rf7+H Kg6H 3.Rg8+H Kh5H 4.Rf5+H
Qxf5+H 5.Kxf5H e2H 6.Re8H h3H 7.Rxe2H Kh4H
8.gxh3H Kg3H 9.Rd2H Kxh3H {EGTB} 10.Kf4! d3
11.Rxd3+ Kg2! 12.Re3 h5 13.Re2+! Kf1! 14.Ke3!
h4! 15.Rh2 h3 16.Rxh3 Kg2! 17.Rf3! Kg1! 18.Rg3+
Kh1! 19.Kf3 Kh2 20.Kf2! Kh1 21.Rh3#! {500}
With some patience, it might find the mate without backwards analysis. Perhaps
setting aggressive TB usage first, can speed up things. I don't want to torture
the HD of my new notebook too much.
While writing this post, I tried the aggressive TB probing setup:
278839134 13:30.5 Mat22 13t 1.Rgf8 Kg6 2.Rf6+ Kh5 3.Rg8 Qf2 4.Rf5+ Qxf5+
5.Kxf5 e2 6.Re8 h3 7.Rxe2 Kh4 8.Re4+ Kg3 9.gxh3
Kxh3H {EGTB} 10.Kf4! Kg2! 11.Rxd4! Kf2!
12.Rd2+! Kf1! 13.Rh2 Ke1! 14.Ra2 h5 15.Rh2 h4
16.Ke3! Kf1 17.Rxh4! Kg2! 18.Rg4+! Kh3! 19.Kf3!
Kh2 20.Rh4+ Kg1 21.Rh5 Kf1 22.Rh1#! {500}
It should be quite a bit faster on a modern desktop computer (that has
significantly faster HDs than the typical notebook).
Regards,
Dieter
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