Nice endgame breakthrough

Discussion of anything and everything relating to chess playing software and machines.

Moderators: bob, hgm, Harvey Williamson

Forum rules
This textbox is used to restore diagrams posted with the [d] tag before the upgrade.
Post Reply
User avatar
M ANSARI
Posts: 3411
Joined: Thu Mar 16, 2006 6:10 pm

Nice endgame breakthrough

Post by M ANSARI » Fri Dec 10, 2010 5:45 pm

[d]8/5k2/1p2q1p1/3pQpP1/1P3P1P/6K1/5P2/8 w - - 0 54


Many moves look strong but actually end up drawing. Few engines get h5! which wins on the spot. There is a possibility that Qc7+ is winning also but not so sure.

yanquis1972
Posts: 1762
Joined: Tue Jun 02, 2009 10:14 pm

Re: Nice endgame breakthrough

Post by yanquis1972 » Fri Dec 10, 2010 6:20 pm

critter finds this instantly on 4 cores even without tablebases. houdini on 8 cores gets it @ d28.

[+1.81] d=28 54.h5 Qxe5 55.fxe5 gxh5 (0:01:01) 774981kN
[+1.63] d=28 54.h5 Qxe5 55.fxe5 gxh5 (0:00:44) 565780kN
[+1.55] d=28 54.Qh8 Ke7 55.b5 Qe2 56.Qf6 Kd7 57.Qc6 Ke7 58.Qc7 Ke8 59.Qe5 Qxe5 60.fxe5 Ke7 61.f4 Kf8 62.Kf3 Kf7 63.Ke3 Ke7 64.Kd3 Kd7 65.Ke2 Ke6 66.Kd2 Ke7 67.Ke3 Kd7 68.Kf3 Ke6 69.Kf2 Ke7 70.Ke3 Kd7 (0:00:19) 237184kN
[+1.55] d=27 54.Qh8 Ke7 55.b5 Qe2 56.Qf6 Kd7 57.Qc6 Ke7 58.Qc7 Ke8 59.Qe5 Qxe5 60.fxe5 Ke7 61.f4 Kd7 62.Kf3 Ke6 63.Ke3 Kd7 64.Ke2 Ke6 65.Kd2 Ke7 66.Kd3 Kd7 67.Kd4 Ke6 68.Kc3 Kf7 69.Kd3 Ke7 70.Kd2 Ke6 71.Kc2 Ke7 72.Kd2 Ke6 (0:00:12) 149414kN
[+1.55] d=26 54.Qh8 Ke7 55.b5 Qe2 56.Qf6 Kd7 57.Qc6 Ke7 58.Qc7 Ke8 59.Qe5 Qxe5 60.fxe5 Ke7 61.f4 Kd7 62.Kf3 Ke6 63.Ke3 Kd7 64.Ke2 Ke6 65.Kd2 Ke7 66.Kd3 Kd7 67.Kd4 Ke6 68.Kc3 Kf7 69.Kd4 Ke6 70.Kc3 (0:00:07) 88836kN
[+1.55] d=25 54.Qh8 Ke7 55.b5 Qe2 56.Qf6 Kd7 57.Qc6 Ke7 58.Qc7 Ke8 59.Qe5 Qxe5 60.fxe5 Ke7 61.f4 Kd7 62.Kf3 Ke6 63.Ke3 Kd7 64.Ke2 Ke6 65.Kd2 Ke7 66.Kd3 Kd7 67.Kc3 Ke7 68.Kd4 Ke6 69.Kc3 Kf7 70.Kd3 Ke7 71.Kd2 Ke6 72.Kc3 Kf7 (0:00:04) 52946kN
[+1.55] d=24 54.Qh8 Ke7 55.b5 Qe2 56.Qf6 Kd7 57.Qc6 Ke7 58.Qc7 Ke8 59.Qe5 Qxe5 60.fxe5 Ke7 61.f4 Kd7 62.Kf3 Ke6 63.Ke3 Kd7 64.Ke2 Ke6 65.Kd2 Ke7 66.Kd3 Kd7 67.Ke3 Ke7 68.Kd4 Ke6 69.Kc3 Ke7 70.Kd4 Ke6 (0:00:03) 35087kN
[+1.55] d=23 54.Qh8 Ke7 55.b5 Qe2 56.Qf6 Kd7 57.Qc6 Ke7 58.Qc7 Ke8 59.Qe5 Qxe5 60.fxe5 Ke7 61.f4 Kd7 62.Kf3 Ke6 63.Ke3 Kd7 64.Ke2 Ke6 65.Kd2 Ke7 66.Kd3 Kd7 67.Ke3 Ke7 68.Kd4 Ke6 69.Kd3 Ke7 70.Ke2 Ke6 71.Kd2 (0:00:02) 23286kN
[+1.55] d=22 54.Qh8 Ke7 55.b5 Qe2 56.Qf6 Kd7 57.Qc6 Ke7 58.Qc7 Ke8 59.Qe5 Qxe5 60.fxe5 Ke7 61.f4 Kd7 62.Kf3 Ke6 63.Ke3 Kd7 64.Ke2 Ke6 65.Kd2 Ke7 66.Kd3 Kd7 67.Kd4 Ke6 68.Kc3 Ke7 69.Kd4 Ke6 70.Kc3 (0:00:01) 16476kN
[+1.55] d=21 54.Qh8 Ke7 55.b5 Qe2 56.Qf6 Kd7 57.Qc6 Ke7 58.Qc7 Ke8 59.Qe5 Qxe5 60.fxe5 Ke7 61.f4 Kd7 62.Kf3 Ke6 63.Ke3 Kd7 64.Ke2 Ke6 65.Kd2 Ke7 66.Kd3 Kd7 67.Kc3 Ke7 68.Kd4 Ke6 69.Kd3 Ke7 70.Ke2 Ke6 71.Kd2 (0:00:01) 13017kN
[+1.55] d=20 54.Qh8 Ke7 55.b5 Qe2 56.Qf6 Kd7 57.Qc6 Ke7 58.Qc7 Ke8 59.Qe5 Qxe5 60.fxe5 Ke7 61.f4 Kd7 62.Kf3 Ke6 63.Ke3 Kd7 64.Ke2 Ke6 65.Kd2 Ke7 66.Kd3 Kd7 67.Kd4 Ke6 68.Kd3 Ke7 69.Ke2 Ke6 70.Kd2 (0:00:01) 10118kN
[+1.55] d=19 54.Qh8 Ke7 55.b5 Qe2 56.Qf6 Kd7 57.Qc6 Ke7 58.Qc7 Ke8 59.Qe5 Qxe5 60.fxe5 Ke7 61.f4 Kd7 62.Kf3 Ke6 63.Ke3 Kd7 64.Ke2 Ke6 65.Kf3 Kf7 66.Ke3 Ke7 67.Kd4 Ke6 68.Kd3 Ke7 69.Ke2 Ke6 70.Kf3 (0:00:01) 9327kN
[+1.54] d=19 54.Qh8 Ke7 55.Qg7 Qf7 56.Qxf7 Kxf7 57.Kf3 Ke6 58.Ke3 Ke7 59.Kd4 Kd6 60.Kd3 Kd7 61.Kd2 Kd6 62.Ke2 Ke6 63.Kf3 Kf7 64.Ke3 Ke6 65.Kd4 Kd6 66.Kd3 (0:00:00) 6703kN
[+1.37] d=19 54.Qh8 Ke7 55.Qg7 Qf7 56.Qxf7 Kxf7 57.Kf3 Ke6 58.Ke3 Ke7 59.Kd4 Kd6 60.Kd3 Kd7 61.Kd2 Kd6 62.Ke2 Ke6 63.Kf3 Kf7 64.Ke3 Ke6 65.Kd4 Kd6 66.Kd3 (0:00:00) 5642kN
[+1.26] d=19 54.Qxe6 Kxe6 55.Kf3 Kf7 56.Ke3 Ke6 57.Kd4 Kd6 58.Kd3 Kd7 59.Kd2 Kd6 60.b5 Ke6 61.Kd3 Kd7 62.Ke3 Kd6 63.Kd4 Ke6 64.Kd3 Kd7 (0:00:00) 443kN
[+1.28] d=18 54.Qxe6 Kxe6 55.Kf3 Kf7 56.Ke3 Ke6 57.Kd4 Kd6 58.Kd3 Kd7 59.Ke2 Ke6 60.Kd2 Kd6 61.Kc3 Kd7 62.Kd3 Kd6 63.Kd4 Ke6 64.f3 Kd6 65.Ke3 Ke6 66.Kd4 Kd6 (0:00:00) 301kN
[+1.28] d=17 54.Qxe6 Kxe6 55.Kf3 Kf7 56.Ke3 Ke6 57.Kd4 Kd6 58.Kd3 Kd7 59.Ke2 Ke6 60.Ke3 Kd6 61.Kd4 Ke6 62.f3 Kd6 63.Ke3 Ke6 64.Kd4 Kd6 (0:00:00) 199kN
[+1.28] d=16 54.Qxe6 Kxe6 55.Kf3 Kf7 56.Ke3 Ke6 57.Kd4 Kd6 58.Kd3 Kd7 59.Ke2 Ke6 60.Ke3 Ke7 61.Kd2 Kd6 62.Ke2 Ke6 63.Ke3 (0:00:00) 119kN
[+1.28] d=15 54.Qxe6 Kxe6 55.Kf3 Kf7 56.Ke3 Ke6 57.Kd4 Kd6 58.Kd3 Kd7 59.Kc3 Kd6 60.Kd4 Ke6 61.f3 Kd6 62.Ke3 Ke6 63.Kd4 Kd6 (0:00:00) 75kN
[+1.28] d=14 54.Qxe6 Kxe6 55.Kf3 Kf7 56.Ke3 Ke6 57.Kd4 Kd6 58.Kd3 Kd7 59.Kc3 Kd6 60.Kd4 Ke6 61.f3 Kd6 62.Kd3 Ke6 63.Kd4 Kd6 (0:00:00) 43kN

zullil
Posts: 5683
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Nice endgame breakthrough

Post by zullil » Fri Dec 10, 2010 8:33 pm

M ANSARI wrote:[d]8/5k2/1p2q1p1/3pQpP1/1P3P1P/6K1/5P2/8 w - - 0 54


Many moves look strong but actually end up drawing. Few engines get h5! which wins on the spot. There is a possibility that Qc7+ is winning also but not so sure.
Here's what Stockfish-1.9.1 (8 threads) has using MultiPV=3:

Code: Select all

info multipv 1 score cp 561 depth 31 time 8224125 nodes 92633246998 nps 11263599 pv h4h5 g6h5 e5c7 f7e8 c7g7 e6e4 g7h8 e8d7 h8h5 e4b1 h5f7 d7d6 f7f6 d6d7 f6d4 b1b3 g3g2 b3c4 d4g7 d7c6 g7f6 c6b5 f6f5 b5a4 g5g6 d5d4 f5f7 c4c6 g2g3 d4d3 

info multipv 2 score cp 496 depth 31 time 8224125 nodes 92633246998 nps 11263599 pv e5c7 f7e8 c7c3 e8d7 c3d4 d7e8 h4h5 g6h5 d4g7 e6e2 g7g6 e8d8 g6f5 h5h4 g3g2 d8e7 f5h7 e7f8 h7h4 f8g8 h4h3 d5d4 h3c8 g8f7 c8d7 f7g6 d7d4 e2g4 g2f1 b6b5 d4e4 g6f7 f2f3 g4h3 f1e2 h3g2 e2e3 

info multipv 3 score cp 460 depth 31 time 8224125 nodes 92633246998 nps 11263599 pv e5h8 f7e7 h8c3 e7d7 c3d4 d7e8 h4h5 g6h5 d4g7 e6e2 g7g6 e8d8 g6f5 h5h4 g3g2 d8e7 f5h7 e7f8 h7h4 e2e4 g2g3 e4d3 f2f3 d3d4 h4h6 f8e7 h6h7 e7d6 h7b1 d6e7 g3g4 b6b5 b1f5 

yanquis1972
Posts: 1762
Joined: Tue Jun 02, 2009 10:14 pm

Re: Nice endgame breakthrough

Post by yanquis1972 » Sat Dec 11, 2010 3:58 am

HIARCS on my stock quad does well (1 minute, depth 24)

Analysis by HIARCS 13.1 MP:

1.Qh8 b5 2.Qh7+ Kf8 3.Qc7 Qe7 4.Qc6 Kg7 5.Qxb5 Qd6 6.Qc5 Qd7 7.Qd4+ Kh7 8.h5 gxh5 9.Kh4
+- (1.93) Depth: 14/32 00:00:00 1141kN
1.Qh8 Ke7 2.h5 gxh5 3.Qxh5 d4 4.Qh7+
+- (2.14) Depth: 14/32 00:00:00 1508kN
1.Qh8 Ke7 2.h5 gxh5 3.Qxh5 Kf8 4.Qh7 b5 5.Qb7 Qe1 6.Qc8+ Kg7 7.Qd7+ Kh8 8.Qxf5 Qg1+ 9.Kf3 Qd1+ 10.Kg2 Qd2 11.Kf3
+- (2.14) Depth: 15/35 00:00:00 2425kN
1.Qh8 Ke7 2.h5 Qe2 3.Qf6+ Kd7 4.Qg7+ Kc8 5.Qg8+ Kc7 6.Qxg6 Qg4+
+- (1.89) Depth: 16/39 00:00:01 4424kN
1.Qh8 Ke7
+- (1.64 --) Depth: 17/39 00:00:02 6652kN
1.Qh8 Ke7 2.b5 Kf7 3.Qe5 Ke7 4.Qg7+ Qf7 5.Qc3 Qe6 6.h5 gxh5 7.Qg7+ Qf7
+- (1.63) Depth: 17/41 00:00:05 15289kN
1.Qh8 Ke7 2.b5 Kf7 3.Qe5 Ke7 4.Qg7+ Ke8 5.Qc7 Kf8 6.h5 gxh5 7.Kh4 Qe2 8.Qd8+ Kg7 9.Qf6+ Kg8 10.Qg6+ Kh8 11.Qxf5 Qxf2+ 12.Kxh5 Qe2+ 13.Qg4 Qe8+ 14.Kh6
+- (1.64) Depth: 18/41 00:00:06 18106kN
1.Qh8 Ke7 2.b5 Kf7 3.Qe5 Ke7 4.Qg7+ Ke8 5.Qc7 Kf8 6.h5 gxh5 7.Kh4 Ke8 8.Qc6+ Ke7 9.g6 Qf6+ 10.Kxh5 d4 11.Qb7+ Kf8 12.Qd7 Kg8 13.Qc6 Qxc6 14.bxc6
+- (1.70) Depth: 19/41 00:00:08 25081kN, tb=3
1.Qh8 Ke7 2.b5 Kf7 3.Qe5 Ke7 4.Qg7+ Ke8 5.Qc7 Kf8 6.h5 gxh5 7.Kh4 Ke8 8.Qc6+ Ke7 9.g6 Qf6+ 10.Kxh5 d4 11.Qb7+ Kf8 12.Qd7 Kg8 13.Qc6 Kg7 14.Qc7+ Kf8 15.Qd7
+- (1.70) Depth: 20/41 00:00:11 32831kN, tb=10
1.Qh8 Ke7 2.b5 Qe2 3.Qf6+ Kd7 4.Qc6+ Ke7
+- (1.74) Depth: 21/43 00:00:20 62132kN, tb=23
1.Qh8 Ke7 2.b5 Qe2 3.Qf6+ Kd7 4.Qf7+ Kc8 5.Qg8+ Kc7
+- (1.74) Depth: 22/43 00:00:33 102mN, tb=67
1.h5
+- (1.75) Depth: 22/45 00:01:00 179mN, tb=963
1.h5 gxh5 2.Qc7+ Kf8 3.b5
+- (1.96) Depth: 22/52 00:01:33 281mN, tb=2180
1.h5 gxh5 2.Qc7+ Kf8 3.b5 Ke8 4.Qg7 Qd6 5.Qg8+ Ke7 6.Qh7+ Kf8 7.Qxh5 Kg7 8.Qe8 d4 9.Qc6 Qd8 10.Qh6+ Kg8 11.Qg6+
+- (2.19) Depth: 23/52 00:02:19 424mN, tb=5487
1.h5 gxh5 2.Qc7+ Kg8 3.b5 Qe2 4.Qd8+
+- (2.41) Depth: 24/55 00:04:40 870mN, tb=16886

yanquis1972
Posts: 1762
Joined: Tue Jun 02, 2009 10:14 pm

Re: Nice endgame breakthrough

Post by yanquis1972 » Sat Dec 11, 2010 3:59 am

latest ivanhoe does extremely well (haven't given it access to robbobases yet either) --


New game
8/5k2/1p2q1p1/3pQpP1/1P3P1P/6K1/5P2/8 w - - 0 1

Analysis by IvanHoe 9.49b x64:

1.b5 Qxe5 2.fxe5 Ke6 3.Kf4 d4 4.f3 d3 5.Ke3 d2 6.Kxd2 Kxe5
+/- (1.12) Depth: 6 00:00:00 2kN
1.b5 Qxe5 2.fxe5 Ke6 3.Kf4 d4 4.f3 d3 5.Ke3 d2 6.Kxd2 Kxe5
+/- (1.12) Depth: 6 00:00:00 2kN
1.b5 Qxe5 2.fxe5 Ke6 3.Kf4 d4 4.f3 d3 5.Ke3 d2 6.Kxd2 Kxe5 7.Kd3
+/- (1.17) Depth: 7 00:00:00 3kN
1.b5 Qxe5 2.fxe5 Ke6 3.Kf4 d4 4.f3 d3 5.Ke3 d2 6.Kxd2 Kxe5 7.Kd3
+/- (1.17) Depth: 7 00:00:00 3kN
1.b5 Qxe5 2.fxe5 Ke6 3.Kf4 d4 4.f3 d3 5.Ke3 d2 6.Kxd2 Kxe5 7.Kd3 Kf4
+/- (1.25 ++) Depth: 8 00:00:00 5kN
1.b5 Ke7 2.Kf3 Qxe5 3.fxe5 Ke6 4.Kf4 d4 5.f3 d3 6.Ke3 d2 7.Kxd2 Kxe5 8.Kd3 Kf4
+/- (1.20) Depth: 8 00:00:00 7kN
1.Qxe6+ Kxe6
+/- (1.33 ++) Depth: 8 00:00:00 11kN
1.Qxe6+ Kxe6
+- (1.45 ++) Depth: 8 00:00:00 13kN
1.Qxe6+ Kxe6
+- (1.63 ++) Depth: 8 00:00:00 14kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.f3 Ke7 5.Kd4 Ke6 6.Kd3 Kd6 7.Kd4 Ke6
+- (1.70) Depth: 8 00:00:00 19kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.f3 Ke7 5.Kd4 Ke6 6.Kd3 Kd6 7.Kd4 Ke6
+- (1.70) Depth: 8 00:00:00 19kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 b5 5.Ke3 Kd7 6.f3 Ke6 7.Kd4
+- (1.68) Depth: 9 00:00:00 24kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 b5 5.Ke3 Kd7 6.f3 Ke6 7.Kd4
+- (1.68) Depth: 9 00:00:00 25kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.f3 Ke6 7.Ke3 Ke7 8.Kd4 Ke6
+- (1.70) Depth: 10 00:00:00 32kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.f3 Ke6 7.Ke3 Ke7 8.Kd4 Ke6
+- (1.70) Depth: 10 00:00:00 34kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.f3 Ke6 7.Ke3 Ke7 8.Kd3 Kd6 9.Kd4
+- (1.70) Depth: 11 00:00:00 44kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.f3 Ke6 7.Ke3 Ke7 8.Kd3 Kd6 9.Kd4
+- (1.70) Depth: 11 00:00:00 47kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.f3 Ke6 7.Ke3 Ke7 8.Kd3 Kd6 9.Kd4
+- (1.70) Depth: 12 00:00:00 65kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.f3 Ke6 7.Ke3 Ke7 8.Kd3 Kd6 9.Kd4
+- (1.70) Depth: 12 00:00:00 72kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Ke2 Ke6 6.Ke3 Ke7 7.f3 Kf7 8.Kd3 Ke7 9.Kd4 Ke6 10.Ke3 Ke7 11.b5 Ke6 12.Kd3 Kd6 13.Kd4
+- (1.70) Depth: 13 00:00:00 109kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Ke2 Ke6 6.Ke3 Ke7 7.f3 Kf7 8.Kd3 Ke7 9.Kd4 Ke6 10.Ke3 Ke7 11.b5 Ke6 12.Kd3 Kd6 13.Kd4
+- (1.70) Depth: 13 00:00:00 120kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kd2 Ke7 8.Ke2 Ke6 9.Ke3 Ke7 10.f3 Kf7 11.Kd3 Ke7 12.b5 Ke6 13.Kd4 Kd6
+- (1.70) Depth: 14 00:00:00 168kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kd2 Ke7 8.Ke2 Ke6 9.Ke3 Ke7 10.f3 Kf7 11.Kd3 Ke7 12.b5 Ke6 13.Kd4 Kd6
+- (1.70) Depth: 14 00:00:00 186kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kd2 Ke7 8.Ke2 Ke6 9.Ke3 Ke7 10.f3 Kf7 11.Kd4 Ke6 12.Kd3 Kd6 13.Ke3 Ke7 14.b5 Kd6 15.Kd4 Ke6
+- (1.70) Depth: 15 00:00:00 261kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kd2 Ke7 8.Ke2 Ke6 9.Ke3 Ke7 10.f3 Kf7 11.Kd4 Ke6 12.Kd3 Kd6 13.Ke3 Ke7 14.b5 Kd6 15.Kd4 Ke6
+- (1.70) Depth: 15 00:00:00 283kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kd2 Ke7 8.Ke2 Ke6 9.Ke3 Ke7 10.f3 Kf7 11.Kd4 Ke6 12.Kd3 Kd6 13.Ke3 Ke7 14.b5 Kd6 15.Kd4 Ke6
+- (1.70) Depth: 16 00:00:00 385kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kd2 Ke7 8.Ke2 Ke6 9.Ke3 Ke7 10.Kd4
+- (1.70) Depth: 16 00:00:00 429kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kd2 Ke7 8.Ke2 Ke6 9.Ke3 Ke7 10.f3 Kf7 11.Kd3 Ke7 12.Ke3
+- (1.70) Depth: 17 00:00:00 544kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kd2 Ke7 8.Ke2 Ke6 9.Ke3 Ke7 10.f3 Kf7 11.Kd3 Ke7 12.Ke3
+- (1.70) Depth: 17 00:00:00 619kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kd2 Ke7 8.Ke2 Ke6 9.Ke3 Ke7 10.f3 Kf7 11.Kd3 Ke7 12.Kd4 Ke6 13.Kd3 Kd6 14.Ke3 Ke7 15.b5 Kd6 16.Kd4 Ke6 17.Ke3 Kd6
+- (1.70) Depth: 18 00:00:00 807kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kd2 Ke7 8.Ke2 Ke6 9.Ke3 Ke7 10.f3 Kf7 11.Kd3 Ke7 12.Kd4 Ke6 13.Kd3 Kd6 14.Ke3 Ke7 15.b5 Kd6 16.Kd4 Ke6 17.Ke3 Kd6
+- (1.70) Depth: 18 00:00:00 896kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kb2 Kd6 8.Kc2 Ke6 9.Kd2 Ke7 10.Ke2 Ke6 11.Ke3 Ke7 12.f3 Kf7 13.Kd3 Ke7 14.Kd4 Ke6 15.Kd3 Kd6 16.Ke3 Ke7 17.b5 Kd6 18.Kd4 Ke6 19.Ke3 Kd6
+- (1.68) Depth: 19 00:00:00 1407kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 b5 5.Ke3 Kd7 6.f3 Ke6 7.Kd4
+- (1.68) Depth: 19 00:00:00 2409kN
1.Qxe6+ Kxe6 2.Kf3 Kf7 3.Ke3 Ke6 4.Kd3 Ke7 5.Kd4 Kd6 6.Kc3 Ke6 7.Kb2 Kd6 8.Kc2 Ke6 9.Kd2 Ke7 10.f3 Ke6 11.Kd3 Kd6 12.Ke3 Ke7 13.b5 Kd6 14.Kd4 Ke6 15.Ke3 Kd6
+- (1.68) Depth: 20 00:00:00 2860kN
1.Qc7+ Kg8 2.Qb8+ Kh7 3.Qb7+ Kg8
+- (1.76 ++) Depth: 20 00:00:02 12699kN
1.Qc7+ Kg8 2.Qb8+ Kh7 3.Qb7+ Kg8
+- (1.84 ++) Depth: 20 00:00:03 17319kN
1.Qc7+ Ke8 2.Qh7 Kf8 3.b5 Qe2 4.Qh8+ Ke7 5.Qf6+ Kd7 6.Qc6+ Ke7 7.Qc7+ Ke8 8.Qe5+ Qxe5 9.fxe5 Kf7 10.f4 Ke7 11.Kf2 Ke6 12.Ke3 Ke7 13.Kd3 Kf7 14.Kd4 Ke6 15.Kc3 Ke7 16.Kd2 Kf7
+- (1.78) Depth: 20 00:00:03 18230kN
1.Qc7+ Ke8 2.Qh7 Kf8 3.b5 Qe2 4.Qh8+ Ke7 5.Qf6+ Kd7 6.Qc6+ Ke7 7.Qc7+ Ke8 8.Qe5+ Qxe5 9.fxe5 Kf7 10.f4 Ke7 11.Kf2 Ke6 12.Ke3 Ke7 13.Kd3 Kf7 14.Kd4 Ke6 15.Kc3 Ke7 16.Kd2 Kf7
+- (1.78) Depth: 20 00:00:03 18505kN
1.Qc7+ Ke8 2.Qh7 Kf8 3.b5 Qe2 4.Qh8+ Ke7 5.Qf6+ Kd7 6.Qc6+ Ke7 7.Qc7+ Ke8 8.Qe5+ Qxe5 9.fxe5 Kf7 10.f4 Ke7 11.Kf2 Ke6 12.Ke3 Ke7 13.Kd3 Kf7 14.Kd4 Ke6 15.Kc3 Ke7 16.Kd2 Kf7
+- (1.86 ++) Depth: 21 00:00:04 23757kN
1.Qc7+ Ke8 2.Qh7 Kf8 3.b5 Qe2 4.Qh8+ Ke7 5.Qf6+ Kd7 6.Qc6+ Ke7 7.Qc7+ Ke8 8.Qe5+ Qxe5 9.fxe5 Kf7 10.f4 Ke7 11.Kf2 Ke6 12.Ke3 Ke7 13.Kd3 Kf7 14.Kd4 Ke6 15.Kc3 Ke7 16.Kd2 Kf7 17.Ke3 Ke7
+- (1.78) Depth: 21 00:00:04 25494kN
1.Qc7+ Ke8 2.Qh7 Kf8 3.b5 Qe2 4.Qh8+ Ke7 5.Qf6+ Kd7 6.Qc6+ Ke7 7.Qc7+ Ke8 8.Qe5+ Qxe5 9.fxe5 Kf7 10.f4 Ke7 11.Kf2 Ke6 12.Ke3 Ke7 13.Kd3 Kf7 14.Kd4 Ke6 15.Kc3 Ke7 16.Kd2 Kf7 17.Ke3 Ke7
+- (1.78) Depth: 21 00:00:05 32873kN
1.Qc7+ Ke8 2.Qh7 Kf8 3.b5 Qe2 4.Qh8+ Ke7 5.Qf6+ Kd7 6.Qc6+ Ke7 7.Qc7+ Ke8 8.Qe5+ Qxe5 9.fxe5 Kf7 10.f4 Ke7 11.Kf2 Ke6 12.Ke2 Ke7 13.Ke3 Kd7 14.Kd3 Ke7 15.Ke2 Kf8 16.Kf3 Ke7 17.Ke3
+- (1.79) Depth: 22 00:00:07 40143kN
1.h5
+- (1.86 ++) Depth: 22 00:00:11 67393kN

1.h5
+- (1.94 ++) Depth: 22 00:00:13 77108kN
1.h5
+- (2.06 ++) Depth: 22 00:00:16 96558kN
1.h5 gxh5 2.Qc7+ Kf8 3.Kh4 Ke8 4.Qh7 Qe4 5.Qxh5+ Kd7 6.Qf7+ Kd6 7.Qf6+ Kd7 8.Kg3 Qd3+ 9.f3 Qb1 10.Qf7+ Kd6 11.Qg6+ Kd7 12.Qxb6 Qe1+ 13.Qf2 Qxb4 14.Qa7+ Kd8 15.Qe3 d4 16.Qe5 d3 17.Qd5+ Ke7 18.Qxd3 Qe1+ 19.Kg2 Qe6 20.Qb5 Kf7
+- (2.06) Depth: 22 00:00:18 106mN
1.h5 gxh5 2.Qc7+ Kf8 3.Kh4 Ke8 4.Qh7 Qe4 5.Qxh5+ Kd7 6.Qf7+ Kd6 7.Qf6+ Kd7 8.Kg3 Qd3+ 9.f3 Qb1 10.Qf7+ Kd6 11.Qg6+ Kd7 12.Qxb6 Qe1+ 13.Qf2 Qxb4 14.Qa7+ Kd8 15.Qe3 d4 16.Qe5 d3 17.Qd5+ Ke7 18.Qxd3 Qe1+ 19.Kg2 Qe6 20.Qb5 Kf7
+- (2.06) Depth: 22 00:00:18 107mN
1.h5 gxh5 2.Qc7+ Kf8 3.Kh4 Ke8 4.Qh7 Qe4 5.Qxh5+ Kd7 6.Qf7+ Kd6 7.Qf6+ Kd7 8.Kg3 Qd3+ 9.f3 Qb1 10.Qf7+ Kd6 11.Qg6+ Kd7 12.Qxb6 Qe1+ 13.Qf2 Qxb4 14.Qa7+ Kd8 15.Qe3 d4 16.Qe5 d3 17.Qd5+ Ke7 18.Qxd3 Qe1+ 19.Kg2 Qe6 20.Qb5 Kf7
+- (2.14 ++) Depth: 23 00:00:23 137mN
1.h5 gxh5 2.Qc7+ Kf8 3.Kh4 Ke8 4.Qh7 Qe4 5.Qxh5+ Kd7 6.Qf7+ Kd6 7.Qf6+ Kd7 8.Kg3 Qd3+ 9.f3 Qb1 10.Qxb6 Qe1+ 11.Qf2 Qxb4 12.Qa7+ Kd8 13.Qe3 d4 14.Qe5 d3 15.Qd5+ Ke7 16.Qxd3 Qe1+ 17.Kg2 Qe6 18.Qd4 Kf7 19.Qe5 Qa2+ 20.Kg3 Qc2 21.Qf6+ Kg8
+- (2.20) Depth: 23 00:00:26 157mN
1.h5 gxh5 2.Qc7+ Kf8 3.Kh4 Ke8 4.Qh7 Qe4 5.Qxh5+ Kd7 6.Qf7+ Kd6 7.Qf6+ Kd7 8.Kg3 Qd3+ 9.f3 Qb1 10.Qxb6 Qe1+ 11.Qf2 Qxb4 12.Qa7+ Kd8 13.Qe3 d4 14.Qe5 d3 15.Qd5+ Ke7 16.Qxd3 Qe1+ 17.Kg2 Qe6 18.Qd4 Kf7 19.Qe5 Qa2+ 20.Kg3 Qc2 21.Qf6+ Kg8
+- (2.20) Depth: 23 00:00:26 157mN

jdart
Posts: 3842
Joined: Fri Mar 10, 2006 4:23 am
Location: http://www.arasanchess.org

Re: Nice endgame breakthrough

Post by jdart » Sat Dec 11, 2010 2:46 pm

Arasan, multi-pv output at 1 hr/move, thinks h5 is best but other moves are good:

found 5-man tablebases in directory c:\chess\tb
bm h5
result: h5 score: +2.59 ++ solved in 273.59 sec. (904.03M nodes)

h5 gxh5 Qh8 Qe2
result(2): Qc3 score: +1.76 ** not solved in 3600.03 secs. (
12595.21M nodes)
Qc3 Qd6 Qd4 Qe6 h5 gxh5 Qh8 b5
result(3): Qc7+ score: +2.21 ** not solved in 3600.09 secs. (
12182.09M nodes)
Qc7+ Ke8 Qc3 Kd8

Kurt Utzinger
Posts: 169
Joined: Sun May 11, 2008 8:31 pm
Location: Switzerland
Contact:

Re: Nice endgame breakthrough

Post by Kurt Utzinger » Sun Dec 12, 2010 11:47 am

M ANSARI wrote:[d]8/5k2/1p2q1p1/3pQpP1/1P3P1P/6K1/5P2/8 w - - 0 54

Many moves look strong but actually end up drawing. Few engines get h5! which wins on the spot. There is a possibility that Qc7+ is winning also but not so sure.
Here the analysis of Deep Shredder 12 Linux
on Quad Q6600/2.4 GHz
1 -0.32 54.Dxe6+ Kxe6 (0.01)
1 +1.04 54.h5 gxh5 (0.01)
1 +1.28 54.Dh8 (0.01)
1 +1.56 54.Dc7+ Kg8 (0.01)
2 +1.55 54.Dc7+ Kf8 55.Dd8+ Kg7 (0.01)
3 +1.45 54.Dc7+ Ke8 55.Db8+ Kf7 56.Db7+ Kf8 (0.01)
4 +1.46 54.Dc7+ Ke8 55.Dg7 Dd6 56.b5 (0.01)
5 +1.28 54.Dc7+ Ke8 55.Dg7 Dd6 56.Dd4 Kf7 57.b5 (0.01)
6 +1.21 54.Dc7+ Ke8 55.Dg7 Dd6 56.Dd4 Kd7 57.f3 Kc7 (0.02)
6 +2.05 54.Dh8 Ke7 55.h5 gxh5 56.Dh7+ Kd8 57.Dxh5 De4 (0.02)
7 +1.85 54.Dh8 Ke7 55.h5 gxh5 56.Dh7+ Kd6 57.Db7 b5 58.Db6+ Ke7 59.Dxb5 (0.03)
8 +1.97 54.Dh8 Ke7 55.h5 gxh5 56.Dxh5 d4 57.Dh6 Dxh6 58.gxh6 d3 59.Kf3 Kf7 60.Ke3 Kg6 (0.04)
9 +2.55 54.Dh8 b5 55.h5 gxh5 56.Dxh5+ Kg7 57.Dd1 Kg6 58.Dd4 De4 59.Db6+ Kf7 60.Dxb5 d4 (0.08)
10 +2.56 54.Dh8 b5 55.Dh7+ Kf8 56.Dc7 Da6 57.Dd8+ Kg7 58.h5 gxh5 59.Dxd5 Da3+ 60.f3 Dxb4 61.Dxf5 (0.12)
11 +2.72 54.Dh8 b5 55.Dh7+ Kf8 56.Dc7 Ke8 57.Db8+ Ke7 58.Dxb5 d4 59.Db7+ Kd6 60.Da6+ Kd5 61.Db5+ Ke4 62.De2+ Kd5 63.Da2+ (0.17)
12 +2.72 54.Dh8 b5 55.Dh7+ Kf8 56.Dc7 Ke8 57.Db8+ Ke7 58.Dxb5 Dd6 59.De2+ Kd8 60.De5 Kd7 61.h5 Dxe5 62.fxe5 gxh5 (0.23)
13 +1.94 54.Dh8 Ke7 55.b5 De2 56.Df6+ Kd7 57.Dc6+ Ke7 58.Db7+ Ke8 59.Dc8+ Ke7 60.Dc7+ (1.45)
13 +2.32 54.b5 Ke7 55.Dc7+ Ke8 56.h5 gxh5 57.Dh7 Kf8 (1.95)
14 +2.31 54.b5 Ke7 55.Dc7+ Ke8 56.Dh7 Kd8 57.h5 De2 58.Dg8+ Kc7 59.Dg7+ Kd8 (2.09)
15 +2.28 54.b5 Ke7 55.Dc7+ Ke8 56.Dh7 Kd8 57.h5 De2 58.Dg8+ Kc7 59.Dg7+ Kd8 (2.43)
16 +2.16 54.b5 Ke7 55.Dc7+ Ke8 56.Dh7 Kd8 57.h5 De2 58.Dg8+ Kc7 59.Dg7+ Kd8 (3.72)
17 +2.23 54.b5 Ke7 55.Dc7+ Ke8 56.Dh7 Kd8 57.Dh8+ (7.12)
18 +2.21 54.b5 Dxe5 55.fxe5 Ke7 56.f4 Ke8 57.Kf3 Kd7 58.Ke2 Ke7 59.Kd3 Kd7 60.Kc3 Ke7 61.Kc2 Kd7 (10.47)
18 +2.43 54.Dh8 Ke7 55.Dg7+ Kd8 56.Dd4 Kd7 57.b5 Ke7 58.h5 (21.58)
19 +2.43 54.Dh8 Ke7 55.Dg7+ Kd8 56.Dd4 Kd7 57.b5 Ke7 58.h5 gxh5 59.Dg7+ Df7 60.Dh8 Dg6 61.De5+ De6 (25.45)
20 +2.42 54.Dh8 Ke7 55.Dg7+ Kd8 56.Dd4 Ke7 57.h5 gxh5 58.Dh8 Dg6 59.b5 Kf7 60.Kh4 De6 61.Dh7+ Kf8 62.Kg3 (47.47)
20 +2.83 54.h5 gxh5 55.Dc7+ Kf8 56.Kh4 Ke8 57.Dh7 De4 58.Dxh5+ Kd7 59.Df7+ Kc6 60.Kg3 Dd3+ 61.f3 De3 62.Dxf5 Dg1+ 63.Kh4 Dh2+ 64.Kg4 Dg2+ 65.Kh5 Dxf3+ 66.Kh6 Dh1+ (222.46)
21 +3.15 54.h5 gxh5 55.Dc7+ Ke8 56.Dh7 Kf8 57.b5 De2 58.Dxf5+ Kg7 59.Df6+ Kg8 60.g6 h4+ 61.Kg2 De8 62.Kh3 Dd7+ 63.Kxh4 d4 64.Dc6 (481.28)
22 +3.21 54.h5 gxh5 55.Dc7+ Ke8 56.Dh7 Kf8 57.b5 De2 58.Dxf5+ Kg7 59.Df6+ Kg8 60.g6 h4+ 61.Kg2 De8 62.Kh3 Dd7+ 63.Kxh4 d4 64.Dc6 (629.93)
23 +3.41 54.h5 gxh5 55.Dc7+ Ke8 56.Dh7 Kf8 57.b5 De2 58.Dxf5+ Kg7 59.Df6+ Kg8 60.g6 h4+ 61.Kg2 De8 62.Kh3 Dd7+ 63.Kxh4 d4 64.Dc6 (1240.24)
24 +3.43 54.h5 gxh5 55.Dc7+ Kf8 56.Kh4 Ke8 57.Dh7 De2 58.Dxf5 d4 59.g6 d3 60.g7 De7+ 61.Kxh5 Dxg7 62.Dxd3 Dc7 63.Dg6+ Kf8 64.Df6+ Kg8 (2473.45)

yanquis1972
Posts: 1762
Joined: Tue Jun 02, 2009 10:14 pm

Re: Nice endgame breakthrough

Post by yanquis1972 » Wed Dec 15, 2010 11:19 pm

the new houdini (could be luck admittedly)

[no TBs]

[+1.99] d=24 54.h5 (0:00:10) 168132kN
[+1.57] d=24 54.h5 (0:00:07) 103961kN
[+1.39] d=24 54.h5 (0:00:06) 91165kN
[+1.29] d=24 54.b5 Qxe5 55.fxe5 Ke6 56.f4 Ke7 57.Kf3 Ke6 58.Ke3 Kf7 59.Kd4 Ke6 60.Kd3 Kf7 61.Kc3 Ke7 62.Kd2 Kf7 63.Kc2 Ke6 64.Kd1 Kf7 65.Kd2 Ke6 66.Ke2 Kf7 67.Ke3 Ke7 68.Ke2 Ke6 69.Kf3 Kf7 70.Ke3 Ke7 (0:00:03) 53392kN
[+1.29] d=23 54.b5 Qxe5 55.fxe5 Ke6 56.f4 Ke7 57.Kf3 Ke6 58.Ke3 Kf7 59.Kd4 Ke6 60.Kd3 Kf7 61.Ke3 Ke7 62.Ke2 Ke6 63.Kf2 Ke7 64.Kg3 Ke6 65.Kf3 Kf7 66.Kf2 Ke7 67.Kg3 (0:00:02) 28510kN
[+1.29] d=22 54.b5 Qxe5 55.fxe5 Ke6 56.f4 Ke7 57.Kf3 Ke6 58.Ke3 Kf7 59.Kd4 Ke6 60.Kd3 Kf7 61.Ke3 Ke7 62.Kd2 Kf7 63.Ke2 Ke6 64.Kf3 Kf7 65.Kf2 Ke6 66.Ke2 Ke7 67.Kf1 Kf7 68.Kf2 Ke6 (0:00:00) 6601kN
[+1.29] d=21 54.b5 Qxe5 55.fxe5 Ke6 56.f4 Ke7 57.Kf3 Ke6 58.Ke3 Kf7 59.Kd4 Ke6 60.Kd3 Kf7 61.Ke2 Ke6 62.Kf3 Kf7 63.Kf2 Ke7 64.Ke2 Ke6 65.Kf3 (0:00:00) 5696kN
[+1.28] d=21 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Ke3 Kd6 58.Kd4 Ke6 59.Kd3 Kd7 60.Kd2 Kd6 61.Ke3 Ke6 62.Ke2 Kd6 63.Kd2 Ke6 64.Ke2 Kd6 (0:00:00) 1389kN
[+1.28] d=20 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Ke3 Kd6 58.Kd4 Ke6 59.Kd3 Kd7 60.Kc2 Kd6 61.Kd2 Ke6 62.Kc2 Kd6 63.Kd2 (0:00:00) 864kN
[+1.28] d=19 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Ke3 Kd6 58.Kd4 Ke6 59.Kd3 Kd7 60.Kc2 Kd6 61.Kd2 Ke6 62.Ke2 Kd6 63.Kd3 Ke6 64.Ke2 Kd6 (0:00:00) 558kN
[+1.28] d=18 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Ke3 Kd6 58.Kd4 Ke6 59.Kd3 Kd7 60.Kc3 Ke6 61.Kd4 Kd6 62.Kd3 Ke6 63.Kd4 Kd6 (0:00:00) 392kN
[+1.28] d=17 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Ke3 Kd6 58.Kd4 Ke6 59.Kd3 Kd7 60.Kd2 Kd6 61.Ke3 Kd7 62.Kd3 Ke6 63.Ke3 Kd6 (0:00:00) 286kN
[+1.28] d=16 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Ke3 Kd6 58.Kd4 Ke6 59.Kd3 Kd7 60.Kc3 Ke6 61.Kd4 Kd6 62.Kd3 Ke6 63.Ke3 Kd6 (0:00:00) 152kN
[+1.28] d=15 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Ke3 Kd6 58.Kd4 Ke6 59.Kd3 Kd7 60.Kc3 Ke6 61.Kd4 Kd6 62.b5 Ke6 63.f3 Kd6 (0:00:00) 82kN
[+1.28] d=14 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Kd3 Kd7 58.Ke3 Ke6 59.Kd4 Kd6 60.b5 Ke6 61.f3 Kd6 (0:00:00) 55kN
[+1.28] d=13 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Kd3 Kd7 58.Kd4 Kd6 59.b5 Ke6 60.f3 Kd6 (0:00:00) 39kN
[+1.28] d=12 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Kd3 Kd7 58.Kd4 Kd6 59.b5 Ke6 60.f3 Kd6 (0:00:00) 29kN
[+1.26] d=11 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Kd3 Kd7 58.Kd4 Kd6 59.b5 Ke6 60.f3 Kd6 (0:00:00) 24kN
[+1.25] d=11 54.Qxe6 (0:00:00) 21kN
[+1.16] d=10 54.Qxe6 Kxe6 55.Kf3 Kd7 56.Ke2 Ke6 57.Kd3 Kd7 58.Kd4 Kd6 59.b5 Ke6 (0:00:00) 18kN

Post Reply