Author: Dieter Buerssner
Date: 00:48:09 03/30/05
Go up one level in this thread
On March 29, 2005 at 22:48:13, Mike Byrne wrote:
>how before your engine realizes black is winning...
>
>Black(1): 1k6/8/8/8/8/5p1p/PPP5/6K1 w - - 0 1
Yace 3 s with TBs/bitbases. Without any TBs, 7s:
2837131 2.750 1.35 11. 1.a4 Kc7 2.a5 Kb7 3.b4 Ka6 4.c4 Ka7 5.c5 Kb7
6.b5 Kb8 7.a6 Ka7 8.c6 Kb6 9.a7 Kxa7 10.c7 Kb7
11.b6 Kc8 12.Kf2 {0}
3497051 3.390 0.95 12-- 1.a4 Kc7 2.a5 Kb7 3.b4 Ka6 4.c4 Ka7 5.b5 Kb7
6.a6+ Kb6 7.Kh2 f2 8.a7 f1=Q 9.a8=Q Qxc4 10.Kg3
{0}
3969894 3.843 -0.05 12-- 1.a4 Kc7 2.a5 Kb7 3.b4 Ka6 4.c4 Ka7 5.b5 Kb7
6.a6+ Kb6 7.a7 Kxa7 8.c5 Kb8 9.c6 Kc7 10.b6+
Kxb6 11.Kh2 f2 12.c7H f1=QH 13.c8=QH {HT}
4244316 4.109 -1.20 12t 1.a4 Kc7 2.a5 Kb7 3.b4 Ka6 4.c4 Ka7 5.b5 Kb7
6.a6+ Kb6 7.c5+ Ka7 8.c6 Kb6 9.c7 Kxc7H 10.a7H
Kb7H 11.b6H Ka8H 12.Kh1H f2H 13.b7+H Kxb7H
14.a8=Q+H Kxa8H {-160}
5333775 5.156 -1.20 12. 1.a4 Kc7 2.a5 Kb7 3.b4 Ka6 4.c4 Ka7 5.b5 Kb7
6.a6+ Kb6 7.c5+ Ka7 8.c6 Kb6 9.c7 Kxc7 10.a7
Kb7 11.b6 Ka8 12.Kh1 f2 13.b7+ Kxb7 14.a8=Q+
Kxa8 {-160}
5546280 5.390 -1.60 13-- 1.a4 Kc7 2.a5 Kb7 3.b4 Ka6 4.c3 Kb5 5.Kf2 h2
6.a6 h1=Q 7.a7 Qh2+ 8.Ke3 f2 9.a8=Q f1=Q 10.Kd4
{-841}
5667635 5.515 -2.60 13-- 1.a4 Kc7 2.a5 Kb7 3.b4 Ka6 4.c3 Kb5 5.Kf2 h2
6.a6 h1=Q 7.a7 Qh2+ 8.Ke3 f2 9.a8=Q f1=Q 10.Kd4
{-841}
6675144 6.515 -6.31 13t 1.a4 Kc7 2.a5 Kb7 3.b4 Ka6 4.c4 Ka7 5.b5 Kb7
6.a6+ Kb6 7.c5+ Ka7 8.c6 Kb6 9.c7 Kxc7 10.a7
Kb7 11.b6 Ka8H 12.Kf2H h2H 13.Kxf3H h1=Q+H
14.Kf4H {-841}
7389975 7.187 -6.31 13. 1.a4 Kc7 2.a5 Kb7 3.b4 Ka6 4.c4 Ka7 5.b5 Kb7
6.a6+ Kb6 7.c5+ Ka7 8.c6 Kb6 9.c7 Kxc7 10.a7
Kb7 11.b6 Ka8 12.Kf2 h2 13.Kxf3 h1=Q+ 14.Kf4
{-841}
With aggressive TB probing, it shows a mate score after a while:
33320007 3:56.0 -16.95 16. 1.a4 Kb7 2.b4 Ka7 3.a5 Ka6 4.c4 Ka7 5.b5 Kb7
6.a6+ Kb6 7.c5+ Ka7 8.c6 Kb6 9.a7 Kxa7 10.c7
Kb7 11.b6 Kc8 12.Kf1 h2 13.Kf2 h1=Q 14.Ke3 f2
15.Kd4 Qd1+ 16.Ke5 f1=Q {-1842}
36527323 4:24.8 -17.35 17-- 1.a4 Kb7 2.b4 Ka7 3.a5 Ka6 4.c4 Ka7 5.b5 Kb7
6.a6+ Kb6 7.c5+ Ka7 8.c6 Kb6 9.a7 Kxa7 10.c7
Kb7 11.b6 Kc8 12.Kf2 h2 13.Ke3 f2 14.Kd4 f1=Q
15.Kc3 h1=Q 16.Kb3 Qb7 {-1842}
44737232 5:43.3 -18.35 17-- 1.a4 Kb7 2.b4 Ka7 3.a5 Ka6 4.c4 Ka7 5.b5 Kb7
6.a6+ Kb6 7.c5+ Ka7 8.c6 Kb6 9.Kf2 h2 10.Ke3 f2
11.a7 Kxa7 12.Kf4 Kb6 13.Kf5 h1=Q 14.Kg5 f1=Q
15.c7
49472272 6:29.9 -23.35 17-- 1.a4 Kb7 2.b4 Ka7 3.a5 Ka6 4.c4 Ka7 5.b5 Kb7
6.a6+ Kb6 7.c5+ Ka7 8.c6 Kb6 9.Kf2 h2 10.Ke3 f2
11.a7 Kxa7 12.Kf4 Kb6 13.Kf5 h1=Q 14.Kg5 f1=Q
15.c7
64429771 9:55.1 -Mat26 17t 1.a4 Kb7 2.a5 Ka7 3.b3 Kb7 4.c4 Ka7H 5.c5H Kb8H
6.b4H Kb7H 7.b5H Kb8H 8.Kf2H h2H 9.Kg3H h1=QH
10.Kg4H f2H 11.b6H Qd5H 12.a6H Qf5+H 13.Kxf5H
f1=Q+H 14.Ke6H Qxa6H {EGTB} 15.Kf6 Qa5 16.Kf5
Qxc5+ 17.Kf4 Qd5 18.b7 Qd3 19.Kg4 Kxb7! 20.Kg5
Qf3 21.Kg6 Kc7 22.Kh6 Qg3 23.Kh7 Kd7 24.Kh8 Ke7
25.Kh7 Kf7 26.Kh8 Qh3# {-1001}
168086253 33:20.5 -Mat26 17. 1.a4 Kb7 2.a5 Ka7 3.b3 Kb7 4.c4 Ka7 5.c5 Kb8
6.b4 Kb7 7.b5 Kb8 8.Kf2 h2 9.Kg3 h1=Q 10.Kg4 f2
11.b6 Qd5 12.a6 Qf5+ 13.Kxf5 f1=Q+ 14.Ke6 Qxa6
{EGTB} 15.Kf6 Qa5 16.Kf5 Qxc5+ 17.Kf4 Qd5 18.b7
Qd3 19.Kg4 Kxb7! 20.Kg5 Qf3 21.Kg6 Kc7 22.Kh6
Qg3 23.Kh7 Kd7 24.Kh8 Ke7 25.Kh7 Kf7 26.Kh8
Qh3# {-1001}
[...]
311180827 53:09.5 -Mat26 22. 1.a4 Kb7 2.a5 Ka7 3.b3 Kb7 4.c4 Ka7 5.c5 Kb8
6.b4 Kb7 7.b5 Kb8 8.a6 Ka7 9.c6 Kb6 10.c7 Kxc7
11.a7 Kb7 12.b6 Ka8 13.Kh2 f2 14.Kxh3 {EGTB}
14...f1=Q+! 15.Kg3 Qg1+ 16.Kf3 Qxb6! 17.Kf4 Qe6
18.Kf3 Qf5+ 19.Kg3 Kxa7! 20.Kg2 Kb6! 21.Kh2 Qg5
22.Kh3 Kc6 23.Kh2 Kd5! 24.Kh3 Ke4! 25.Kh2 Kf3!
26.Kh3 Qh5# {-1001}
Regards,
Dieter
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