Author: Dieter Buerssner
Date: 09:01:00 01/25/05
Go up one level in this thread
On January 24, 2005 at 23:01:36, Will Singleton wrote:
>Not sure. I think Yace does some learning by default, but not in the endgame.
Correct. Also it never does some learning from analyse mode, neither does it any
learning from setup positions (by FEN or the old WB edit). I think it is no
surprise, that different hash size can make a position solved earlier or later,
in the late endgame often a few plies. Usage of TBs and/or bitbases may make a
difference, too. Version 0.99.87 will find the move immediately, and setting it
up for aggressive TB usage (tb_u 4 or through UCI-interface) it will show a mate
fast:
828210 2.328 4.74 10. 1...Rxg2 2.Kxg2 Kg4 3.Kf2 Kh3 4.Kf3 f5 5.Kf2
Kh2 6.Kf3 Kg1 7.Ke3 Kg2 8.Kd4 Kxg3 9.Ke5 Kxh4
10.Kf6 Kg4 11.Ke5 h4 12.Kd5 {160}
859618 2.531 5.14 11++ 1...Rxg2 2.Kxg2 Kg4 3.Kf2 Kh3 4.g4 hxg4 5.Ke2
f6 6.f5 g3 7.fxg6 g2 8.Kf2 Kh2 9.g7 g1=Q+ 10.Kf3
867405 2.547 6.15 11++ 1...Rxg2 2.Kxg2 Kg4 3.Kf2 Kh3 4.g4 hxg4 5.Ke2
f6 6.f5 g3 7.fxg6 g2 8.g7 g1=Q 9.g8=B
1136882 9.000 11.15 11++ 1...Rxg2 2.Kxg2 Kg4 3.Kf2 Kh3 4.g4 hxg4 5.Ke2
f6 6.f5 g3 7.Kd2 g2 8.Kc1 g1=Q+ 9.Kb2 Qf2+
10.Ka3 Qxf5 11.h5
5236485 1:24.0 Mat27 11t 1...Rxg2 2.Kxg2 Kg4 3.Kf2 Kh3 4.Kf3 f5 5.Kf2
Kh2 6.Kf3 Kg1 7.Ke3 Kg2 8.g4 hxg4H 9.Kd4H Kg3H
10.Kc5H Kxh4H 11.Kd6H g5H 12.Ke5H gxf4H {EGTB}
13.Kxf4! g3! 14.Kf3 f4 15.Kxf4 g2! 16.Ke4 g1=Q!
17.Kd5! Qc1 18.Kd4 Qc6! 19.Kd3 Qc5! 20.Kd2 Qc4
21.Kd1 Kg4 22.Ke1 Qc2! 23.Kf1 Kf3! 24.Kg1 Qg2#!
{1001}
[Note that it shows a PV of M in 24 while giving mate inm 27 score - this is
because the PV was reconstructed from the hash starting from 8...hxg4].
5380142 1:25.0 Mat27 11. 1...Rxg2 2.Kxg2 Kg4 3.Kf2 Kh3 4.Kf3 f5 5.Kf2
Kh2 6.Kf3 Kg1 7.Ke3 Kg2 8.g4 hxg4 9.Kd4 Kg3
10.Kc5 Kxh4 11.Kd6 g5 12.Ke5 gxf4 {EGTB}
13.Kxf4! g3! 14.Kf3 f4 15.Kxf4 g2! 16.Ke4 g1=Q!
17.Kd5! Qc1 18.Kd4 Qc6! 19.Kd3 Qc5! 20.Kd2 Qc4
21.Kd1 Kg4 22.Ke1 Qc2! 23.Kf1 Kf3! 24.Kg1 Qg2#!
{1001}
8200893 1:48.4 Mat24 12t 1...Rxg2 2.Kxg2 Kg4 3.Kf2 Kh3 4.Kf3 f5 5.Kf2
Kh2 6.Kf3 Kg1 7.Ke3 Kg2 8.g4 hxg4 9.Kd4 Kg3
10.Kd3 Kxf4 11.Kc2 Kg3H 12.Kc3H Kxh4H {EGTB}
13.Kd3 f4 14.Kd2 f3 15.Kd1 g3 16.Ke1! g2
17.Kf2! Kg4 18.Kg1! Kf4 19.Kf2! Ke4! 20.Ke1!
g1=Q+! 21.Kd2 f2 22.Kc2 f1=Q! 23.Kc3 Qb1!
24.Kc4 Qgc1# {2082}
8518062 1:50.2 Mat24 12. 1...Rxg2 2.Kxg2 Kg4 3.Kf2 Kh3 4.Kf3 f5 5.Kf2
Kh2 6.Kf3 Kg1 7.Ke3 Kg2 8.g4 hxg4 9.Kd4 Kg3
10.Kd3 Kxf4 11.Kc2 Kg3 12.Kc3 Kxh4 {EGTB}
13.Kd3 g3 14.Ke3 g2 15.Kf2! Kh3! 16.Kg1! f4!
17.Kf2 Kh2! 18.Kf3 g1=Q! 19.Kxf4 Qc5! 20.Ke4!
Kg2 21.Kd3! Kf3! 22.Kd2 Qc4! 23.Kd1! Ke3!
24.Ke1 Qc1# {1081}
[... and some change in PV later ...]
419149381 1:42:11 Mat24 18. 1...Rxg2 2.Kxg2 Kg4 3.Kf2 Kh3 4.Kf3 f5 5.Kf2
Kh2 6.Kf3 Kg1 7.Ke3 Kg2 8.Kd4 Kxg3 9.Ke3 Kxh4
10.Kf3 g5 11.fxg5 {EGTB} 11...Kxg5!! 12.Kg3 h4+
13.Kh3 f4! 14.Kg2! Kg4! 15.Kh2 h3 16.Kh1! f3!
17.Kg1! Kf4! 18.Kf1 h2 19.Kf2 Ke4! 20.Ke1! f2+!
21.Kf1 h1=Q+! 22.Kxf2! Qh2+! 23.Kf1 Ke3 24.Ke1
Qe2# {1001}
Regards,
Dieter
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