Author: Dieter Buerssner
Date: 07:44:29 03/04/01
Go up one level in this thread
On March 04, 2001 at 10:28:01, Sune Larsson wrote:
>
> [D]8/5pb1/7p/6PK/7P/Pk6/8/8 w - - 0 1
>
> Ellison, 1972
>
> Test: White to move and draw. It might be interesting to check if your
> program can make it in a) blitz (5-10 min)
Probably not.
b) rapidgame (30-60 min)
Maybe on a fast computer. May also depend on the set of available EGTBs.
> c) tournamentlevel (40/2). The solution is further down.
Yace (in the background):
6526926 53.850 -2.04 15t 1.gxh6 Bh8 2.Kg5 Kxa3 3.h7 Kb4 4.Kf5 Kc5 5.Ke4
Kd6 6.Kf5 Ke7 7.h5 Kf8 8.Ke4 Kg7 {-270}
12032037 1:33.5 -2.03 15t+ 1.g6 f6 2.Kg4 Kxa3 3.h5 Bh8 4.Kf5 Kb3 5.Ke6 Ka2
6.Kf7 f5 7.g7 Bxg7 8.Kxg7 f4 {-80}
12837896 1:38.7 -1.64 15++ 1.g6 f6 2.Kg4 h5+ 3.Kxh5 Kxa3 4.Kg4 Bf8 5.h5
Kb4 6.Kg3 Kc4 7.Kh4 Kd5 8.Kg3 Bg7 9.Kf4 {-270}
14109438 1:46.0 -1.62 15t 1.g6 f5 2.a4 Kb4 3.a5 f4 4.Kg4 Kxa5 5.Kxf4 Kb6
6.Kf5 Kc7 7.Ke6 h5 8.Kf7 Bd4 {-270}
14495811 1:50.1 -1.62 15. 1.g6 f5 2.a4 Kb4 3.a5 f4 4.Kg4 Kxa5 5.Kxf4 Kb6
6.Kf5 Kc7 7.Ke6 h5 8.Kf7 Bd4 {-270}
20819745 2:39.7 -1.22 16++ 1.g6 f5 2.a4 Kb4 3.a5 f4 4.Kg4 Kxa5 5.Kxf4 Kb6
6.Kf5 Kb7 7.Ke6 h5 8.Kf7 Be5 9.g7 Ka8 {-270}
21982075 2:47.0 -1.20 16t 1.g6 f6 2.Kg4 Kc4 3.a4 Kd5 4.a5 Kd6 5.h5 Kc6
6.Kf4 Kc7 7.Kf5 Kb7 8.Ke6 Ka6 {-270}
24860915 3:14.7 -1.20 16. 1.g6 f6 2.Kg4 Kc4 3.a4 Kd5 4.a5 Kd6 5.h5 Kc6
6.Kf4 Kc7 7.Kf5 Kb7 8.Ke6 Ka6 {-270}
35715095 4:43.1 -1.17 17t 1.g6 f6 2.Kg4 Kc4 3.a4 Kb4 4.h5 Kc5 5.Kf4 Kd4
6.a5 Kd5 7.Ke3 Kc5 8.Kf4 Kc6 9.Kf5 Kd5H 10.Kf4H
Kc6H 11.Kf5H Kd5H 12.Kf4H Kc6HR {-270}
40319650 5:52.8 -1.17 17. 1.g6 f6 2.Kg4 Kc4 3.a4 Kb4 4.h5 Kc5 5.Kf4 Kd4
6.a5 Kd5 7.Ke3 Kc5 8.Kf4 Kc6 9.Kf5 Kd5 10.Kf4
Kc6 11.Kf5 Kd5 12.Kf4 Kc6 {-270}
The moves with "H" appended, were retrieved from the hash table at display time,
and not at search time. So they may have been overwritten in between, and don't
make sense. You will also see, that there is allready a repetition in the hash
(but there is no practical methaod, I can think of, to use this information).
>1.g6 f6 [1...f5 2.a4] 2.Kg4 Kxa3 3.h5 [3.Kf5? h5 4.Ke6 Bh8 5.Kf5 Kb4 6.g7 Bxg7
>7.Kg6 Bh8 8.Kxh5 Kc5 9.Kg6 Kd6 10.h5 Ke6 11.Kh7 f5] 3...Kb4 4.Kf5 Kc5 5.Ke6 Bh8
>6.Kf7 f5 7.g7 Bxg7 8.Kxg7 f4 9.Kxh6 ½-½
After 2...Kxa3 I get
6336 0.390 -1.57 10. 3.h5 Ka2 4.Kf5 Ka1 5.Ke6 Bh8 6.Kf7 f5 7.g7 Bxg7
8.Kxg7 {-80}
6678 0.416 -0.80 11++ 3.h5 Kb2 4.Kf5 Ka1H 5.Ke6H f5H 6.Kf7H {HT}
{-350}
11783 0.455 -0.48 11t 3.h5 Kb2 4.Kf5 Bh8 5.Ke6 Kc3 6.Kf7 f5 7.g7 Bxg7
8.Kxg7 Kd4 9.Kxh6 {0}
13506 0.485 -0.48 11. 3.h5 Kb2 4.Kf5 Bh8 5.Ke6 Kc3 6.Kf7 f5 7.g7 Bxg7
8.Kxg7 Kd4 9.Kxh6 {0}
47467 0.990 -0.08 12++ 3.h5 Kb2 4.Kf5 Bh8 5.Ke6 f5 6.g7 Bxg7 7.Kxf5
Ka1 8.Ke4 Bc3 9.Kf4 Be5+ 10.Kxe5 {HT} {0}
58406 1.138 0.00 12t 3.h5 Kb2 4.Kf5 Bh8 5.Ke6 f5 6.g7 Bxg7 7.Kxf5
Ka1 8.Ke4 Bc3 9.Kf4 Bd4 {-350}
61360 1.159 0.00 12. 3.h5 Kb2 4.Kf5 Bh8 5.Ke6 f5 6.g7 Bxg7 7.Kxf5
Ka1 8.Ke4 Bc3 9.Kf4 Bd4 {-350}
etc.
1611356 10.162 0.00 18t 3.h5 Kb2 4.Kf5 Bh8 5.Ke6 Kc3 6.Kf7 f5 7.g7 Bxg7
8.Kxg7 {EGTB} 8...f4 9.Kxh6! f3 10.Kg7! f2
11.h6! f1=Q 12.h7! Qg1+ 13.Kf7 Qh1 14.Kg7 Qh2
15.h8=Q Qxh8+ 16.Kxh8! {No mating material} {0}
Line doesn't change anymore from here.
-- Dieter
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