Author: Dieter Buerssner
Date: 15:52:37 04/07/04
Go up one level in this thread
On April 07, 2004 at 17:42:07, Dieter Buerssner wrote:
>Phantastic by Patzer. I wonder, what magic he is doing here. I first thought,
>very aggressively extending pawn endgame positions (when the root position is
>not a pawn endgame) should help. But it is still rather deep, when the Qs are
>already from the board. Very impressive.
Seems to work to aggressively extend pawn endgames. I added about 4 lines of
code to Yace. When the root position is not a pawn endgame, and the current
position is a pawn endgame, extend 1/2 ply. This is additionally to some other
extension I already have, when trading down to a pawn endgame. Now I get:
46419606 1:00.0 0.60 13t 1.Qd6+ Kf5 2.Qd7+ Kf6 3.c6 Qe1 4.Qh3 Qa5 5.Qc8
Qe1 6.Qd8+ Kf5 7.Qd5+H Kf6H 8.Qd4+H Ke7H 9.c7H
Qg3+H 10.Kg1H Qe1+H {HT} {0}
62198227 1:19.4 0.61 13t+ 1.Qxe3 fxe3 2.Kg1 Kf6 3.Kf1 e2+ 4.Kxe2 Kg6 5.c6
Kf5 6.g4+ Ke6 7.Ke3 Ke7 8.Ke4 f5+ 9.gxf5 Ke8
10.f4 g4 11.c7 Kd7 12.f6 Kc8 13.Kd4 g3 14.Ke5
g2 15.f7 g1=Q 16.f8=Q+ Kxc7 {80}
64671720 1:22.4 1.00 13++ 1.Qxe3 fxe3 2.Kg1H Kf6H 3.Kf1H Ke6H 4.Ke2H Kd5H
5.Kxe3H f5H 6.c6H Kxc6H 7.f4H g4H 8.Kd4H Kd6H
9.g3H Ke6H 10.Kc5H Ke7H 11.Kd5H Kf6H 12.Kd6H
Kg7H 13.Ke5H Kg6H 14.Ke6H Kh6H 15.Kxf5H {HT}
{80}
66202720 1:24.4 2.00 13++ 1.Qxe3 fxe3 2.Kg1H Kf6H 3.Kf1H Ke6H 4.Ke2H Kd5H
5.Kxe3H f5H 6.c6H Kxc6H 7.f4H g4H 8.Kd4H Kd6H
9.g3H Ke6H 10.Kc5H Ke7H 11.Kd5H Kf6H 12.Kd6H
Kg7H 13.Ke5H Kg6H 14.Ke6H Kh6H 15.Kxf5H {HT}
{80}
74338752 1:33.5 7.00 13++ 1.Qxe3 fxe3 2.Kg1H Kf6H 3.Kf1H Ke6H 4.Ke2H Kd5H
5.Kxe3H f5H 6.c6H Kxc6H 7.f4H g4H 8.Kd4H Kd6H
9.g3H Ke6H 10.Kc5H Ke7H 11.Kd5H Kf6H 12.Kd6H
Kg7H 13.Ke5H Kg6H 14.Ke6H Kh6H {HT} {0}
85856005 1:46.3 8.00 13t 1.Qxe3 fxe3 2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5
5.Kxe3 f5 6.c6 Kxc6 7.f4 g4H 8.Kd4H Kd6H 9.g3H
Ke6H 10.Kc5H Ke7H 11.Kd5H Kf6H 12.Kd6H Kg7H
13.Ke5H Kh6H 14.Kxf5H Kh7H 15.Kf6H {HT} {80}
87070103 1:47.9 8.00 13. 1.Qxe3 fxe3 2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5
5.Kxe3 f5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7 11.Kd5 Kf6 12.Kd6 Kg7 13.Ke5 Kh6
14.Kxf5 Kh7 15.Kf6 {HT} {80}
98130094 2:00.7 8.00 14t 1.Qxe3 fxe3 2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5
5.Kxe3 f5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7 11.Kd5 Kf6 12.Kd6 Kg7 13.Ke5 Kg6
14.Ke6 Kh6H {HT} {0}
124259369 2:34.5 8.00 14. 1.Qxe3 fxe3 2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5
5.Kxe3 f5 6.c6 Kxc6 7.f4 g4 8.Kd4 Kd6 9.g3 Ke6
10.Kc5 Ke7 11.Kd5 Kf6 12.Kd6 Kg7 13.Ke5 Kg6
14.Ke6 Kh6 {HT} {0}
138859976 2:51.9 8.40 15++ 1.Qxe3 fxe3 2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5
5.Kxe3 f5 6.c6 f4+ 7.Kd3 Ke6 8.Kc4 Kd6 9.Kb5 g4
10.fxg4 f3 11.gxf3 Kc7 12.f4 Kc8 13.g5 Kb8
14.g6 Ka8 15.c7 Ka7 16.c8=N+ Kb8 17.g7 Kb7 {500}
143707762 2:57.8 9.40 15++ 1.Qxe3 fxe3 2.Kg1H Kf6H 3.Kf1H Ke6H 4.Ke2H Kd5H
5.Kxe3H f5H 6.c6H Kxc6H 7.f4H g4H 8.Kd4H Kd6H
9.g3H Ke6H 10.Kc5H Ke7H 11.Kd5H Kf6H 12.Kd6H
Kg7H 13.Ke5H Kg6H 14.Ke6H Kh6H {HT} {0}
188002510 3:48.9 10.00 15t 1.Qxe3 fxe3 2.Kg1 Kf6 3.Kf1 Ke6 4.Ke2 Kd5
5.Kxe3 f5 6.c6 Kxc6 7.f4 g4H 8.Kd4H Kd6H 9.g3H
Ke6H 10.Kc5H Ke7H {HT} {0}
For general positions, the idea might need some tuning, here it seems to work
exceptionally well.
Regards,
Dieter
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.