Can your program see the draw?

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

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Milos
Posts: 4190
Joined: Wed Nov 25, 2009 1:47 am

Re: Can your program see the draw?

Post by Milos »

Nordlandia wrote:Fortress !?

[d]8/5pk1/4p1p1/2r4p/5P2/1Q3KP1/7P/8 b - - 0 0

[d]8/5pk1/1Q2p1p1/3r3p/4KP2/6PP/8/8 w - - 0 0
Nope, mate:

Code: Select all

FEN: 8/5pk1/4p1p1/2r4p/5P2/1Q3KP1/7P/8 b - - 0 1
Brainfish 191116 64 POPCNT:

 40/60	00:45	 1'343'169k	29'314k	-5.96	Rd5 Qc4 Kh7 h3 Kg7 Ke3 Kg8 Qc8+ Kg7 Qc3+ Kh7 g4 hxg4 hxg4 Kg8 Kf3 Kh7 Ke4 Kg8 Qc6 Kf8 Qc4 Rd8 Qc3 Rd5 Qh8+ Ke7 Ke3 Rd6 Qc3 Rd5 Kf3 Kf8 Kf2 Rd8 Ke3 Rd5 Qh8+ Ke7 Qb2 Kf8 Kf3 g5 Qh8+ Ke7 Qc3 gxf4 Kxf4
 41/62	01:29	 2'723'514k	30'560k	-6.22	Rd5 Qc4 Kh7 h3 Kg7 Ke3 Kg8 Qc8+ Kg7 Qc3+ Kg8 Qb4 Rd7 Qb8+ Kg7 Qe5+ Kg8 g4 Rd5 Qc3 Rd1 Kf3 h4 Qc4 Rd5 Qc8+ Kg7 Qc2 Rb5 Qd3 Rd5 Qc3+ Kg8 Ke4 Rb5 Qc4 Rd5 Qb3 Kf8 Qb8+ Kg7 Ke3 Rc5 Qb2+ Kg8 Kf3 Rc8 Ke4 Rc5 Qb8+ Kg7 Qb4
 42/75	12:42	 25'769'280k	33'779k	-10.41	Rd5 Qc4 Rf5 Ke4 Kg8 Qc3 Rd5 Qc8+ Kg7 h3 Rd1 Qc2 Rd8 Qc3+ Kf8 g4 Rd5 Kf3 Ke7 Qb4+ Ke8 Qb8+ Ke7 Ke2 h4 Qc7+ Ke8 Qc3 Rd6 Kf3 Rd5 Qc8+ Ke7 Qh8 Rd3+ Ke4 Ra3 Qxh4+ f6 Qh8 Ra4+ Kf3 Ra2 Qg7+ Ke8 Qxf6 Ra3+ Kg2 Ra6 Qxg6+ Kd7 Kf3 Ra3+ Kf2 Ra4 Qf7+ Kd6 Qf6 Kd7 f5 Ra2+ Kg3
 43/75	12:44	 25'838'031k	33'784k	-10.41	Rd5 Qc4 Rf5 Ke4 Kg8 Qc3 Rd5 Qc8+ Kg7 h3 Rd1 Qc2 Rd8 Qc3+ Kf8 g4 Rd5 Kf3 Ke7 Qb4+ Ke8 Qb8+ Ke7 Ke2 h4 Qc7+ Ke8 Qc3 Rd6 Kf3 Rd5 Qc4 g5 fxg5 Rxg5 Qc8+ Ke7 Qc7+ Kf6 Qd8+ Kg6 Qg8+ Kf6 Qh8+ Kg6 Ke4 Rd5 Qf8 Rd1 Qg8+ Kf6 Qh8+ Kg6 Qh5+ Kg7 Qxh4 Rg1 g5 Rh1 Qh6+ Kg8
 44/85	12:57	 26'292'400k	33'816k	-10.41	Rd5 Qc4 Rf5 Ke4 Kg8 Qc3 Rd5 Qc8+ Kg7 h3 Rd1 Qc2 Rd8 Qc3+ Kf8 g4 Rd5 Kf3 Kg8 Qc4 h4 Qa2 g5 fxg5 Rxg5 Qb2 Rg6 Qe5 Rh6 Kf4 Kh7 Qc3 Rg6 Ke5 Rh6 Kd6 e5+ Kxe5 Kg7 Kf5+ Kg8 Qd4 Ra6 Qe5 Rg6 Kf4 Kh7 Qh5+ Kg7 Qxh4 Ra6 Qg5+ Kh8 Kf5
 45/85	33:11	 71'657'170k	35'977k	-15.89	Rd5 Qc4 Rf5 Ke4 Kf8 h3 Rd5 Qc3 Ke7 g4 Kd7 Kf3 Ke7 Qb4+ Ke8 Qb3 h4 Qb7 Kf8 Ke4 Ke8 Qb8+ Kd7 Qa7+ Ke8 Qc7 Kf8 Qb8+ Kg7 Qb2+ Kg8 Qc3 Kh7 Qc4 Ra5 Qb4 Ra8 Qb7 Ra4+ Ke5 Kg7 Qb5 Ra8 Kd6 Kf8 Qc5 e5 fxe5 Ra6+ Kd5+ Kg7 Qc3 Kh7 Ke4 g5 Qc7 Kg7 Qd8 Re6 Qc8 Kh7 Qf8 Kg6 Qh8 Ra6 Qg8+ Kh6 Qf8+ Kg6 Qd6+ Rxd6 exd6 Kf6
 46/85	33:15	 71'821'328k	35'983k	-15.89	Rd5 Qc4 Rf5 Ke4 Kf8 h3 Rd5 Qc3 Ke7 g4 Kd7 Kf3 Ke7 Qb4+ Ke8 Qb3 h4 Qb7 Kf8 Ke4 Ke8 Qb8+ Kd7 Qa7+ Ke8 Qc7 Kf8 Qb8+ Kg7 Qb2+ Kg8 Qc3 Kh7 Qc4 Ra5 Qb4 Ra8 Qb7 Ra4+ Ke5 Kg7 Qb5 Ra8 Kd6 Kf8 Qc5 e5 fxe5 Ra6+ Kd5+ Kg7 Qc3 Kh7 Ke4 g5 Qc7 Kg7 Qd8 Re6 Qc8 Kh7 Qf8 Kg6 Qh8 Ra6 Qg8+ Kh6 Qf8+ Kg6 Qd6+ Rxd6 exd6 Kf6 d7
 47/85	45:03	 98'582'265k	36'468k	-17.18	Rd5 Qc4 Rf5 Ke4 Kf8 h3 Rd5 Kf3 Kg8 g4 h4 Qc3 Rd6 Ke4 Rd5 Qb2 Rd1 Qb8+ Kh7 Qb4 Kg7 Ke3 Kg8 Qc3 Rd6 Kf3 Rd1 Qc8+ Kg7 Qc4 Rd8 Ke4 Rd1 Qb4 Rd5 Qb3 Kf8 Qc4 Ke7 Kf3 Kd7 Qa6 Rc5 Qa4+ Kd6 Qd4+ Rd5 Qf6 Rd3+ Ke4 Rxh3 Qxf7 Rh1 f5 g5 Qxe6+ Kc7 Qc4+ Kb6 Qb4+ Kc7 Qa5+ Kc6 Qc3+ Kb6 Qb3+ Kc7 Qc3+ Kd7
 48/85	1:53:28	256'630'309k	37'693k	-46.58	Rd5 Qc4 Rf5 Ke4 Kf8 h3 Rd5 g4 Ke8 Qc8+ Ke7 Qc3 hxg4 hxg4 Kd7 Qb4 Ke8 Qb8+ Rd8 Qb5+ Kf8 Qb2 Rd5 Qh8+ Ke7 Qh3 Kf6 Qb3 Ke7 Kf3 Kd7 Qc3 Rb5 Qc4 Rd5 Ke4 Ke8 Qc7 Kf8 Qb8+ Kg7 Qb4 Rd7 Qc5 Rd8 Qc2 Rb8 Qc4 e5 Qc3 Re8 f5 Re7 Qc5 Re8 Qd6 Kh6 Qd2+ Kg7 Qd7 gxf5+ gxf5 Kf8 Qd6+ Kg7 Qd2 Kh7 Qh2+ Kg7
 49/85	2:34:25	368'540'251k	38'940k	-64.75	Rd5 Qc4 h4 Qc3+ Kg8 Ke4 hxg3 Qc8+ Kh7 hxg3 Kg7 Qc3+ Kg8 g4 Kf8 Ke3 Kg8 Kf3 Rd6 Ke4 Rd5 Qc2 Kg7 Kf3 Kh7 Qc4 Ra5 Qb4 Ra8 Ke4 Kh6 Qd4 Kh7 Qc5 Kg8 Qc3 Rb8 Qc7 Ra8 Ke5 Kg7 Kd6 Kf8 Qe7+ Kg7 Qb7 Rf8 Qb2+ Kg8 Ke5 g5 fxg5 Rc8 Qd4 Rc1 Qd8+ Kg7 Qf6+ Kf8 g6 Re1+ Kd4 Rd1+ Ke4 Re1+ Kd3 Rd1+ Ke2
 50/85	6:03:48	874'967'291k	40'148k	-128.30	Rf5 Qc3+ Kg8 Ke4 Rd5 h3 Kf8 g4 Ke7 Kf3 Kf8 Qb3 hxg4+ hxg4 Rd8 Qc3 Kg8 Ke4 Rd5 Qa1 Rb5 Qd4 Kf8 Qa4 Rd5 Qa8+ Ke7 Qb8 Rd1 Ke3 Rd5 f5 gxf5 g5 Rd6 Qa7+ Rd7 Qa3+ Ke8 Qc3 Rd1 g6 fxg6 Qf6 Re1+ Kd4 Rd1+ Ke5 Re1+ Kd6 Rd1+ Kxe6
and another even quicker mate:

Code: Select all

FEN: 8/5pk1/1Q2p1p1/3r3p/4KP2/6PP/8/8 w - - 0 1

Brainfish 191116 64 POPCNT:

 32/53	00:05	 173'954k	32'772k	+5.40	g4 Kg8 Ke3 Kh7 Qb2 Kg8 Qc3 Kh7 f5 exf5 Qb3 Re5+ Kf4 Re6 gxh5 gxh5 Kxf5 Kg7 Qc3+ Kg8 Kg5 Rg6+ Kh4 Rh6 Qd4 Kh7 Kg5 Rg6+ Kf4 Kg8 Qe5 h4 Qd4 Re6 Qc3 Rg6 Kf5 Rg2
 33/53	00:05	 185'072k	32'675k	+5.40	g4 Kg8 Ke3 Kh7 Qb2 Kg8 Qc3 Kh7 f5 exf5 Qb3 Re5+ Kf4 Re6 gxh5 gxh5 Kxf5 Kg7 Qc3+ Kg8 Kg5 Rg6+ Kh4 Rh6 Qd4 Kh7 Kg5 Rg6+ Kf5 Kg8 Qe5 Re6 Qc7 Kg7 Qg3+ Kf8 Qb8+ Kg7 Qb2+ Kg8 Qc3 Re8 Qg3+ Kf8 Qa3+ Kg8 Qb3 Re6 Kg5 Rg6+ Kf5 Kg7 Qb2+ Kg8
 34/54	00:05	 195'035k	32'636k	+5.40	g4 Kg8 Ke3 Kh7 Qb2 Kg8 Qc3 Kh7 f5 exf5 Qb3 Re5+ Kf4 Re6 gxh5 gxh5 Kxf5 Kg7 Qc3+ Kg8 Kg5 Rg6+ Kh4 Rh6 Qd4 Kh7 Kg5 Rg6+ Kf5 Kg8 Qe5 Rb6 Qc7 Rg6 Qc8+ Kg7 Qc3+ Kg8 Qc5 Kg7 Qe5+ Kg8 Kf4 Rh6 Qb8+ Kg7 Qb2+ Kg8 Qb5 Rf6+ Ke4 Kg7 Qg5+ Rg6 Qe5+ Kg8
 35/54	00:06	 205'089k	32'621k	+5.40	g4 Kg8 Ke3 Kh7 Qb2 Kg8 Qc3 Kh7 f5 exf5 Qb3 Re5+ Kf4 Re6 gxh5 gxh5 Qc3 Rg6 Qc7 Kg7 Qe5+ Kh7 Qc3 Kg8 Qf3 h4 Kxf5 Kg7 Qc3+ Kh7 Qd4 Kg8 Kf4 Rg3 Qe5 Rg6 Qb8+ Kg7 Qb2+ Kh7 Qc3 Kg8
 36/72	08:09	 19'217'532k	39'296k	+128.32	g4 Kg8 Qb7 hxg4 Qb8+ Kg7 Qb2+ Kg8 hxg4 Ra5 Qc2 Ra3 Ke5 Kg7 Qb2 Ra6 Ke4+ Kf8 Qb5 Ra8 Qc5+ Kg7 Qc3+ Kg8 Ke5 Kg7 Kd6+ Kg8 Ke7 Rf8 Kf6 e5 Qxe5 Ra8 f5 Ra6+ Kg5 Kh7 Qc7 Kg7 f6+ Rxf6 Qc3 Kf8 Qxf6 Ke8 Qxg6
 37/72	08:15	 19'499'630k	39'324k	+128.33	g4 Kg8 Qb7 hxg4 Qb8+ Kg7 Qb2+ Kg8 hxg4 Ra5 Qc2 Ra3 Ke5 Kg7 Qb2 Ra6 Ke4+ Kf8 Qb5 Ra8 Qc5+ Kg7 Qc3+ Kg8 Ke5 Kg7 Kd6+ Kg8 Ke7 Rf8 Kf6 e5 Qxe5 Ra8 f5 Ra6+ Kg5 Kh7 Qc7 Kg7 f6+ Rxf6 Qc3 Kf8 Qxf6
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MikeGL
Posts: 1010
Joined: Thu Sep 01, 2011 2:49 pm

Re: Can your program see the draw?

Post by MikeGL »

Milos wrote:
Nordlandia wrote:Fortress !?

[d]8/5pk1/4p1p1/2r4p/5P2/1Q3KP1/7P/8 b - - 0 0

[d]8/5pk1/1Q2p1p1/3r3p/4KP2/6PP/8/8 w - - 0 0
Nope, mate:

Code: Select all

FEN: 8/5pk1/4p1p1/2r4p/5P2/1Q3KP1/7P/8 b - - 0 1
Brainfish 191116 64 POPCNT:

 40/60	00:45	 1'343'169k	29'314k	-5.96	Rd5 Qc4 Kh7 h3 Kg7 Ke3 Kg8 Qc8+ Kg7 Qc3+ Kh7 g4 hxg4 hxg4 Kg8 Kf3 Kh7 Ke4 Kg8 Qc6 Kf8 Qc4 Rd8 Qc3 Rd5 Qh8+ Ke7 Ke3 Rd6 Qc3 Rd5 Kf3 Kf8 Kf2 Rd8 Ke3 Rd5 Qh8+ Ke7 Qb2 Kf8 Kf3 g5 Qh8+ Ke7 Qc3 gxf4 Kxf4
 41/62	01:29	 2'723'514k	30'560k	-6.22	Rd5 Qc4 Kh7 h3 Kg7 Ke3 Kg8 Qc8+ Kg7 Qc3+ Kg8 Qb4 Rd7 Qb8+ Kg7 Qe5+ Kg8 g4 Rd5 Qc3 Rd1 Kf3 h4 Qc4 Rd5 Qc8+ Kg7 Qc2 Rb5 Qd3 Rd5 Qc3+ Kg8 Ke4 Rb5 Qc4 Rd5 Qb3 Kf8 Qb8+ Kg7 Ke3 Rc5 Qb2+ Kg8 Kf3 Rc8 Ke4 Rc5 Qb8+ Kg7 Qb4
 42/75	12:42	 25'769'280k	33'779k	-10.41	Rd5 Qc4 Rf5 Ke4 Kg8 Qc3 Rd5 Qc8+ Kg7 h3 Rd1 Qc2 Rd8 Qc3+ Kf8 g4 Rd5 Kf3 Ke7 Qb4+ Ke8 Qb8+ Ke7 Ke2 h4 Qc7+ Ke8 Qc3 Rd6 Kf3 Rd5 Qc8+ Ke7 Qh8 Rd3+ Ke4 Ra3 Qxh4+ f6 Qh8 Ra4+ Kf3 Ra2 Qg7+ Ke8 Qxf6 Ra3+ Kg2 Ra6 Qxg6+ Kd7 Kf3 Ra3+ Kf2 Ra4 Qf7+ Kd6 Qf6 Kd7 f5 Ra2+ Kg3
 43/75	12:44	 25'838'031k	33'784k	-10.41	Rd5 Qc4 Rf5 Ke4 Kg8 Qc3 Rd5 Qc8+ Kg7 h3 Rd1 Qc2 Rd8 Qc3+ Kf8 g4 Rd5 Kf3 Ke7 Qb4+ Ke8 Qb8+ Ke7 Ke2 h4 Qc7+ Ke8 Qc3 Rd6 Kf3 Rd5 Qc4 g5 fxg5 Rxg5 Qc8+ Ke7 Qc7+ Kf6 Qd8+ Kg6 Qg8+ Kf6 Qh8+ Kg6 Ke4 Rd5 Qf8 Rd1 Qg8+ Kf6 Qh8+ Kg6 Qh5+ Kg7 Qxh4 Rg1 g5 Rh1 Qh6+ Kg8
 44/85	12:57	 26'292'400k	33'816k	-10.41	Rd5 Qc4 Rf5 Ke4 Kg8 Qc3 Rd5 Qc8+ Kg7 h3 Rd1 Qc2 Rd8 Qc3+ Kf8 g4 Rd5 Kf3 Kg8 Qc4 h4 Qa2 g5 fxg5 Rxg5 Qb2 Rg6 Qe5 Rh6 Kf4 Kh7 Qc3 Rg6 Ke5 Rh6 Kd6 e5+ Kxe5 Kg7 Kf5+ Kg8 Qd4 Ra6 Qe5 Rg6 Kf4 Kh7 Qh5+ Kg7 Qxh4 Ra6 Qg5+ Kh8 Kf5
 45/85	33:11	 71'657'170k	35'977k	-15.89	Rd5 Qc4 Rf5 Ke4 Kf8 h3 Rd5 Qc3 Ke7 g4 Kd7 Kf3 Ke7 Qb4+ Ke8 Qb3 h4 Qb7 Kf8 Ke4 Ke8 Qb8+ Kd7 Qa7+ Ke8 Qc7 Kf8 Qb8+ Kg7 Qb2+ Kg8 Qc3 Kh7 Qc4 Ra5 Qb4 Ra8 Qb7 Ra4+ Ke5 Kg7 Qb5 Ra8 Kd6 Kf8 Qc5 e5 fxe5 Ra6+ Kd5+ Kg7 Qc3 Kh7 Ke4 g5 Qc7 Kg7 Qd8 Re6 Qc8 Kh7 Qf8 Kg6 Qh8 Ra6 Qg8+ Kh6 Qf8+ Kg6 Qd6+ Rxd6 exd6 Kf6
 46/85	33:15	 71'821'328k	35'983k	-15.89	Rd5 Qc4 Rf5 Ke4 Kf8 h3 Rd5 Qc3 Ke7 g4 Kd7 Kf3 Ke7 Qb4+ Ke8 Qb3 h4 Qb7 Kf8 Ke4 Ke8 Qb8+ Kd7 Qa7+ Ke8 Qc7 Kf8 Qb8+ Kg7 Qb2+ Kg8 Qc3 Kh7 Qc4 Ra5 Qb4 Ra8 Qb7 Ra4+ Ke5 Kg7 Qb5 Ra8 Kd6 Kf8 Qc5 e5 fxe5 Ra6+ Kd5+ Kg7 Qc3 Kh7 Ke4 g5 Qc7 Kg7 Qd8 Re6 Qc8 Kh7 Qf8 Kg6 Qh8 Ra6 Qg8+ Kh6 Qf8+ Kg6 Qd6+ Rxd6 exd6 Kf6 d7
 47/85	45:03	 98'582'265k	36'468k	-17.18	Rd5 Qc4 Rf5 Ke4 Kf8 h3 Rd5 Kf3 Kg8 g4 h4 Qc3 Rd6 Ke4 Rd5 Qb2 Rd1 Qb8+ Kh7 Qb4 Kg7 Ke3 Kg8 Qc3 Rd6 Kf3 Rd1 Qc8+ Kg7 Qc4 Rd8 Ke4 Rd1 Qb4 Rd5 Qb3 Kf8 Qc4 Ke7 Kf3 Kd7 Qa6 Rc5 Qa4+ Kd6 Qd4+ Rd5 Qf6 Rd3+ Ke4 Rxh3 Qxf7 Rh1 f5 g5 Qxe6+ Kc7 Qc4+ Kb6 Qb4+ Kc7 Qa5+ Kc6 Qc3+ Kb6 Qb3+ Kc7 Qc3+ Kd7
 48/85	1:53:28	256'630'309k	37'693k	-46.58	Rd5 Qc4 Rf5 Ke4 Kf8 h3 Rd5 g4 Ke8 Qc8+ Ke7 Qc3 hxg4 hxg4 Kd7 Qb4 Ke8 Qb8+ Rd8 Qb5+ Kf8 Qb2 Rd5 Qh8+ Ke7 Qh3 Kf6 Qb3 Ke7 Kf3 Kd7 Qc3 Rb5 Qc4 Rd5 Ke4 Ke8 Qc7 Kf8 Qb8+ Kg7 Qb4 Rd7 Qc5 Rd8 Qc2 Rb8 Qc4 e5 Qc3 Re8 f5 Re7 Qc5 Re8 Qd6 Kh6 Qd2+ Kg7 Qd7 gxf5+ gxf5 Kf8 Qd6+ Kg7 Qd2 Kh7 Qh2+ Kg7
 49/85	2:34:25	368'540'251k	38'940k	-64.75	Rd5 Qc4 h4 Qc3+ Kg8 Ke4 hxg3 Qc8+ Kh7 hxg3 Kg7 Qc3+ Kg8 g4 Kf8 Ke3 Kg8 Kf3 Rd6 Ke4 Rd5 Qc2 Kg7 Kf3 Kh7 Qc4 Ra5 Qb4 Ra8 Ke4 Kh6 Qd4 Kh7 Qc5 Kg8 Qc3 Rb8 Qc7 Ra8 Ke5 Kg7 Kd6 Kf8 Qe7+ Kg7 Qb7 Rf8 Qb2+ Kg8 Ke5 g5 fxg5 Rc8 Qd4 Rc1 Qd8+ Kg7 Qf6+ Kf8 g6 Re1+ Kd4 Rd1+ Ke4 Re1+ Kd3 Rd1+ Ke2
 50/85	6:03:48	874'967'291k	40'148k	-128.30	Rf5 Qc3+ Kg8 Ke4 Rd5 h3 Kf8 g4 Ke7 Kf3 Kf8 Qb3 hxg4+ hxg4 Rd8 Qc3 Kg8 Ke4 Rd5 Qa1 Rb5 Qd4 Kf8 Qa4 Rd5 Qa8+ Ke7 Qb8 Rd1 Ke3 Rd5 f5 gxf5 g5 Rd6 Qa7+ Rd7 Qa3+ Ke8 Qc3 Rd1 g6 fxg6 Qf6 Re1+ Kd4 Rd1+ Ke5 Re1+ Kd6 Rd1+ Kxe6
The final mating line looks incorrect, probably a bug?
50/85 6:03:48 874'967'291k 40'148k -128.30 Rf5 Qc3+ Kg8 Ke4 Rd5 h3 Kf8 g4 Ke7 Kf3 Kf8 Qb3 hxg4+ hxg4 Rd8 Qc3 Kg8 Ke4 Rd5 Qa1 Rb5 Qd4 Kf8 Qa4 Rd5 Qa8+ Ke7 Qb8 Rd1 Ke3 Rd5 f5 *gxf5* g5 Rd6 Qa7+ Rd7 Qa3+ Ke8 Qc3 Rd1 g6 fxg6 Qf6 Re1+ Kd4 Rd1+ Ke5 Re1+ Kd6 Rd1+ Kxe6

see the bold gxf5 above, that move loses but exf5 instead of gxf5 can hold and maintain the fortress. 1/2 - 1/2 I guess

[D]1Q6/4kp2/4p1p1/3r1P2/6P1/4K3/8/8 b - - 0 17

Check the above position, if eval function kicks in, then gxf5 is the normal move for engines which loses as shown by your line. But actually exf5 can hold a draw.
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Milos
Posts: 4190
Joined: Wed Nov 25, 2009 1:47 am

Re: Can your program see the draw?

Post by Milos »

MikeGL wrote:The final mating line looks incorrect, probably a bug?
50/85 6:03:48 874'967'291k 40'148k -128.30 Rf5 Qc3+ Kg8 Ke4 Rd5 h3 Kf8 g4 Ke7 Kf3 Kf8 Qb3 hxg4+ hxg4 Rd8 Qc3 Kg8 Ke4 Rd5 Qa1 Rb5 Qd4 Kf8 Qa4 Rd5 Qa8+ Ke7 Qb8 Rd1 Ke3 Rd5 f5 *gxf5* g5 Rd6 Qa7+ Rd7 Qa3+ Ke8 Qc3 Rd1 g6 fxg6 Qf6 Re1+ Kd4 Rd1+ Ke5 Re1+ Kd6 Rd1+ Kxe6

see the bold gxf5 above, that move loses but exf5 instead of gxf5 can hold and maintain the fortress. 1/2 - 1/2 I guess

[D]1Q6/4kp2/4p1p1/3r1P2/6P1/4K3/8/8 b - - 0 17

Check the above position, if eval function kicks in, then gxf5 is the normal move for engines which loses as shown by your line. But actually exf5 can hold a draw.
Gee do you know how engine works? 30 plies down the PV is certainly rubbish, especially in analysis on many cores and even more so in analysis with TBs, so analysing that it completely pointless.
Score 128 in practice means chance that SF will mate is 99.9999999% (a lot of nines) and probability of actually having a fortress is non-existent. But anyway, trying to prove stupid humans (compared to engines) wrong is total waste of time so please continue believing in imaginary fortresses, NLOs, monster from Loch Ness, Santa or whichever thing empowers you, but don't expect anyone wasting time trying to prove you wrong...
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User avatar
RJN
Posts: 303
Joined: Fri Jun 21, 2013 5:18 am
Location: Orion Spiral Arm

Re: Can your program see the draw?

Post by RJN »

jwes wrote:From 1234 Modern Endgame Studies. Finding the right moves is not that hard but does your program return a drawish score?
[D]8/3k2K1/2p1p3/b5P1/3P1P2/8/8/8 w - - bm Kf7; id "MES.150";
Latest AsmFish says this is a Syzygy 6 win:

44/115 02:17 5,330,994,484 38,780,176 -128.18 1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qe8+ Kd6 11.Qe7+ Kc6 12.Qe6+ Kc5 13.Qc8+ Kd4 14.Qg4+ Kc3 15.Qf3+ Kc4 16.Qg4+ d4 17.Kg8 Kc3 18.f7 Ba3 19.Qf3+ Qe3 20.Qc6+ Kd2 21.Qg2+ Qe2 22.Qg5+ Kc2 23.Qg3 Qe7 24.Qg2+ Kc3 25.Qg7 Qd8+ 26.Kh7 Qd5 27.Qf6 Kc2 28.Qf2+ Kb3 29.Qf1 d3 30.Qd1+ Kc3 31.Kg8 Qg5+ 32.Kh7 Qf5+ 33.Kg7 d2 34.Qa4 Bb4 35.Qa1+ Kb3 36.Qg1 Qc2 37.Kg8 d1Q 38.Qe3+ Qc3 39.Qe6+ Kb2 40.Qh6 Qd8+ 41.f8R Qxf8+

Code: Select all

FEN: 8/3k2K1/2p1p3/b5P1/3P1P2/8/8/8 w - - 0 1

AsmFish_2017-02-15_BMI2:
 8/10	00:00	 22,126	7,375,333	-0.16	1.g6 Bb6 2.Kf6 Bxd4+ 3.Kf7 Bh8 4.Kf8 Bb2 5.g7
 9/14	00:00	 41,991	10,497,750	-1.11	1.g6 Bb6 2.d5 Bd4+ 3.Kf7 cxd5 4.Kf8 Bf6 5.Kf7 Bb2
 10/16	00:00	 94,874	15,812,333	-2.16	1.d5 exd5 2.g6 d4 3.Kf7 d3 4.g7 d2 5.g8Q d1Q
 11/19	00:00	 139,962	15,551,333	-2.64	1.Kf7 Bc3 2.d5 cxd5 3.g6 Bb2 4.Kf8 Kd6 5.Kf7 Bc3 6.Kf8 Ba1 7.Kf7
 12/19	00:00	 141,716	15,746,222	-2.64	1.Kf7 Bc3 2.d5 cxd5 3.g6 Bb2 4.Kf8 Kd6 5.Kf7 Bc3 6.Kf8 Ba1 7.Kf7 Kd7 8.Kf8 Bb2 9.Kf7 Bc3 10.Kf8
 13/19	00:00	 147,042	16,338,000	-2.52	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bh8 8.Kf8
 14/22	00:00	 151,095	16,788,333	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8
 15/23	00:00	 152,464	16,940,444	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8
 16/27	00:00	 196,258	16,354,833	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7 Bh8 14.Kg8
 17/27	00:00	 198,552	16,546,000	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7
 18/27	00:00	 231,899	16,564,214	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7 Bd4 14.Kf8
 19/29	00:00	 275,588	17,224,250	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7 Bd4 14.Kf8 Bb2 15.Kf7
 20/31	00:00	 349,250	17,462,500	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7 Bd4 14.Kf8 Bb2 15.Kf7 Bh8 16.Kg8
 21/31	00:00	 392,815	17,855,227	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7 Bc3 14.Kf8 Bh8 15.Kg8 Bf6 16.Kf7
 22/33	00:00	 396,244	18,011,090	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7 Bc3 14.Kf8 Bh8 15.Kg8 Bf6 16.Kf7 Bd4 17.Kf8
 23/34	00:00	 617,806	17,651,600	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7 Bc3 14.Kf8 Bh8 15.Kg8 Bf6 16.Kf7 Bd4 17.Kf8 Kd7
 24/38	00:00	 626,999	17,914,257	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7 Bc3 14.Kf8 Bb2 15.Kf7 Bh8 16.Kg8 Bf6 17.Kf7 Bd4 18.Kf8 Kd7 19.Kf7 Bc3
 25/39	00:00	 678,646	17,859,105	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7 Bc3 14.Kf8 Bb2 15.Kf7 Bh8 16.Kg8 Bf6 17.Kf7 Bd4 18.Kf8 Kd7 19.Kf7 Bh8 20.Kf8
 26/40	00:00	 842,039	18,711,977	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7 Bc3 14.Kf8 Kc7 15.Kf7 Bh8 16.Kg8 Bd4 17.Kf7 Kd6 18.Kf8 Kd7 19.Kf7 Bh8 20.Kg8 Bf6
 27/43	00:00	 1,063,359	19,691,833	-2.07	1.Kf7 Bc3 2.d5 cxd5 3.g6 Ba1 4.Kf8 Bh8 5.Kf7 Bb2 6.Kf8 Ba1 7.Kf7 Bd4 8.Kf8 Kd6 9.Kf7 Ba1 10.Kf8 Bc3 11.Kf7 Bb2 12.Kf8 Ba1 13.Kf7 Bh8 14.Kg8 Bf6 15.Kf7 Bc3 16.Kf8 Kc7 17.Kf7 Bh8 18.Kg8 Bd4 19.Kf7 Kd6 20.Kf8 Kd7 21.Kf7 Bc3 22.Kf8
 28/47	00:00	 2,040,234	23,184,477	-2.58	1.Kf7 Bc3 2.d5 cxd5 3.g6 Bb2 4.Kf8 Bd4 5.Kf7 Kd6 6.Kf8 Bh8 7.Kg8 Bf6 8.Kf7 Ba1 9.Kf8 Kd7 10.Kf7 Bh8 11.Kg8 Bf6 12.Kf7 Bd4 13.Kf8 Bb2 14.Kf7 Ba1 15.Kf8 Kd6 16.Kf7 Bb2 17.Kf8 Bd4 18.Kf7 Bc3 19.Kf8 Kc7 20.Kf7 Bh8 21.Kg8
 29/47	00:00	 2,071,497	23,275,247	-2.58	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Kc7 5.Kf7 Kd7 6.Kf8 Ba1 7.Kf7 Kd6 8.Kf8 Bd4 9.Kf7 Kd7 10.Kf8 Bh8 11.Kg8 Bf6 12.Kf7 Ba1 13.Kf8 Kd6 14.Kf7 Bd4 15.Kf8 Bc3 16.Kf7 Bb2 17.Kf8 Kc7 18.Kf7 Kd7 19.Kf8 Kd6 20.Kf7 Bh8 21.Kg8 Bf6 22.Kf7
 30/49	00:00	 2,306,797	24,029,135	-2.58	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Kc7 5.Kf7 Kd7 6.Kf8 Ba1 7.Kf7 Kd6 8.Kf8 Bd4 9.Kf7 Kd7 10.Kf8 Bh8 11.Kg8 Bf6 12.Kf7 Ba1 13.Kf8 Bb2 14.Kf7 Kd6 15.Kf8 Bc3 16.Kf7 Bh8 17.Kg8 Bf6 18.Kf7 Bd4 19.Kf8 Kc7 20.Kf7 Bh8 21.Kg8 Bb2 22.Kf7 Kd7 23.Kf8 Bd4 24.Kf7
 31/49	00:00	 2,428,045	24,280,450	-2.58	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Kc7 5.Kf7 Kd7 6.Kf8 Ba1 7.Kf7 Kd6 8.Kf8 Bd4 9.Kf7 Kd7 10.Kf8 Bh8 11.Kg8 Bf6 12.Kf7 Ba1 13.Kf8 Kd6 14.Kf7 Bh8 15.Kg8 Bb2 16.Kf8 Kc7 17.Kf7 Bh8 18.Kg8 Bd4 19.Kf7 Kd6 20.Kf8 Kd7 21.Kf7 Bb2 22.Kf8 Kd6 23.Kf7
 32/51	00:00	 3,315,386	25,700,666	-2.50	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Kc7 5.Kf7 Kd7 6.Kf8 Ba1 7.Kf7 Kd6 8.Kf8 Bd4 9.Kf7 Bh8 10.Kg8 Bf6 11.Kf7 Bb2 12.Kf8 Kd7 13.Kf7 Bd4 14.Kf8 Kc6 15.Kf7 Bh8 16.Kg8 Ba1 17.Kf7 Kd7 18.Kf8 Bf6 19.Kf7 Bb2 20.Kf8 Kc7 21.Kf7 Bh8 22.Kg8 Bd4 23.Kf7 Kd6 24.Kf8 Kd7 25.Kf7 Bh8 26.Kg8
 33/53	00:00	 3,498,772	26,110,238	-2.50	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Kc7 5.Kf7 Kd7 6.Kf8 Ba1 7.Kf7 Kd6 8.Kf8 Bf6 9.Kf7 Bb2 10.Kf8 Bc3 11.Kf7 Bd4 12.Kf8 Kc7 13.Kf7 Bh8 14.Kg8 Ba1 15.Kf7 Kd7 16.Kf8 Bh8 17.Kg8 Bd4 18.Kf7 Bb2 19.Kf8 Kc6 20.Kf7 Bh8 21.Kg8 Bd4 22.Kf7 Kd7 23.Kf8 Kd6 24.Kf7
 34/53	00:00	 5,378,655	29,391,557	-2.36	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Kc6 5.Kf7 Kd7 6.Kf8 Kd6 7.Kf7 Ba1 8.Kf8 Bd4 9.Kf7 Bb2 10.Kf8 Kc5 11.Kf7 Bh8 12.Kg8 Bd4 13.Kf7 Kd6 14.Kf8 Kd7 15.Kf7 Ba1 16.Kf8 Kc6 17.Kf7 Bh8 18.Kg8 Bd4 19.Kf7 Kd7 20.Kf8 Ba1 21.Kf7 Bh8 22.Kg8 Bf6 23.Kf7 Bb2 24.Kf8 Kd6 25.Kf7 Bh8 26.Kg8
 35/59	00:00	 6,340,633	31,081,534	-2.29	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Kc6 5.Kf7 Bh8 6.Kg8 Ba1 7.Kf7 Kd7 8.Kf8 Kd6 9.Kf7 Bh8 10.Kg8 Bf6 11.Kf7 Ba1 12.Kf8 Bc3 13.Kf7 Bd4 14.Kf8 Kd7 15.Kf7 Bh8 16.Kg8 Bf6 17.Kf7 Bd4 18.Kf8 Bb2 19.Kf7 Bc3 20.Kf8 Ba1 21.Kf7 Bb2 22.Kf8 Kc6 23.Kf7 Kd6 24.Kf8
 36/59	00:00	 15,202,432	39,080,802	-2.41	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Kc6 5.Kf7 Bh8 6.Kg8 Bb2 7.Kf8 Kd7 8.Kf7 Bc3 9.Kf8 Kd6 10.Kf7 Bd4 11.Kf8 Bb2 12.Kf7 Bh8 13.Kg8 Bf6 14.Kf7 Bb2 15.Kf8 Ba1 16.Kf7 Kd7 17.Kf8 Kc7 18.Kf7 Bh8 19.Kg8 Bd4 20.Kf7 Kd7 21.Kf8 Bh8 22.Kg8 Bf6 23.Kf7 Bb2 24.Kf8 Ba1 25.Kf7 Kd6 26.Kf8 Kc5 27.Kf7 Bh8 28.Kg8
 37/59	00:00	 17,474,710	39,269,011	-2.41	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Kc6 5.Kf7 Bh8 6.Kf8 Bb2 7.Kf7 Kd7 8.Kf8 Bh8 9.Kg8 Bf6 10.Kf7 Ba1 11.Kf8 Bb2 12.Kf7 Kd6 13.Kf8 Ba1 14.Kf7 Bh8 15.Kg8 Bf6 16.Kf7 Ba1 17.Kf8 Kc7 18.Kf7 Bh8 19.Kg8 Bc3 20.Kf7 Kd7 21.Kf8 Ba1 22.Kf7 Bd4 23.Kf8 Kc7 24.Kf7 Kd6 25.Kf8 Kc5 26.Kf7 Bh8 27.Kg8
 38/59	00:01	 83,871,926	47,844,795	-2.33	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Kc6 5.Kf7 Bh8 6.Kf8 Kc7 7.Kg8 Bb2 8.Kf7 Kd7 9.Kf8 Bh8 10.Kg8 Bf6 11.Kf7 Ba1 12.Kf8 Bb2 13.Kf7 Bd4 14.Kf8 Ba1 15.Kf7 Bc3 16.Kf8 Kd6 17.Kf7 Bh8 18.Kg8 Bf6 19.Kf7 Bd4 20.Kf8 Kc5 21.Kf7 Bh8 22.Kg8 Ba1 23.Kf7 Kd6 24.Kf8 Bd4 25.Kf7 Bb2 26.Kf8 Kc6 27.Kf7
 39/59	00:02	 101,171,110	48,085,128	-2.33	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Bh8 5.Kg8 Bf6 6.Kf7 Ba1 7.Kf8 Kd7 8.Kf7 Bb2 9.Kf8 Kd6 10.Kf7 Bd4 11.Kf8 Kc7 12.Kf7 Bh8 13.Kg8 Bb2 14.Kf7 Kd6 15.Kf8 Kc6 16.Kf7 Bh8 17.Kg8 Bc3 18.Kf7 Kd7 19.Kf8 Bf6 20.Kf7 Bd4 21.Kf8 Kd8 22.Kf7 Bh8 23.Kg8 Ba1 24.Kf7 Kd7 25.Kf8 Bd4 26.Kf7 Bh8 27.Kf8 e5
 40/59	00:02	 113,021,327	48,569,543	-2.22	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Ba1 5.Kf7 Bb2 6.Kf8 Kc6 7.Kf7 Bh8 8.Kg8 Ba1 9.Kf7 Kd6 10.Kf8 Bc3 11.Kf7 Bd4 12.Kf8 Kc7 13.Kf7 Bh8 14.Kg8 Bc3 15.Kf7 Kd7 16.Kf8 Ba1 17.Kf7 Bh8 18.Kg8 Bb2 19.Kf7 Bd4 20.Kf8 Kd8 21.Kf7 Bh8 22.Kg8 Ba1 23.Kf7 Kd7 24.Kf8 Bd4 25.Kf7 Bb2 26.Kf8 Kd6 27.Kf7 Bh8 28.Kg8 Bf6 29.Kf7
 41/68+	00:04	 215,953,940	51,137,565	-1.49	1.Kf7
 41/75	00:04	 229,211,728	51,186,183	-1.29	1.Kf7 Bc3 2.d5 cxd5 3.g6 Kd6 4.Kf8 Bb2 5.Kf7 Ba1 6.Kf8 Kc7 7.Kf7 Kd7 8.Kf8 Kd6 9.Kf7 Bd4 10.Kf8 Bc3 11.Kf7 Bh8 12.Kg8 Bf6 13.Kf7 Bb2 14.Kf8 Bd4 15.Kf7 Kd7 16.Kf8 Ba1 17.Kf7 Bh8 18.Kg8 Bf6 19.Kf7 Bc3 20.Kf8 Kc7 21.Kf7 Bh8 22.Kg8 Bb2 23.Kf7 Kd7 24.Kf8 Kc6 25.Kf7 Bh8 26.Kf8 e5 27.Kg8 Bf6 28.f5 e4 29.Kf7 Bc3 30.f6 e3 31.g7 e2 32.g8Q e1Q 33.Qc8+ Kb6 34.Qb8+ Kc5 35.Qa7+ Kc4
 42/79+	00:04	 236,335,651	51,165,977	-1.21	1.Kf7
 42/82-	00:05	 283,808,480	48,898,773	-1.29	1.Kf7 Bc3
 42/115-	00:53	2,077,183,137	38,741,129	-20.26	1.Kf7 Bc3
 42/115	00:56	2,198,428,954	38,610,926	-24.54	1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qg4+ Kd6 11.Qe6+ Kc5 12.Qc8+ Kd4 13.Qg4+ Kc3 14.Qf3+ Kc4 15.Qe2+ Kb4 16.Qh2 Kb3 17.Qb8+ Kc2 18.Qc8+ Kd2 19.Qb7 d4 20.Qg2+ Kc3 21.Kg8 Qe3 22.Qc6+ Kd2 23.f7 Qg5+ 24.Kh7 Qh5+ 25.Kg8 Qg4+ 26.Kh7 Qf5+ 27.Kg8 Ba3 28.Qh6+ Kc3 29.Qa6 Qg5+ 30.Kh8 Qe5+ 31.Kh7 Qh2+ 32.Kg7 Qg3+ 33.Kh8 Qd6 34.Qc8+ Kd2 35.Qf5 d3 36.Kh7 Kc3 37.Qg5 Qe7 38.Qa5+ Qb4 39.Qe5+ Qd4 40.Qa5+ Kb3 41.Qb5+ Ka2 42.Qa6 Qe4+ 43.Kg8 Kb2 44.Qh6 Kc2 45.Qa6 Qg2+ 46.Kh7 Qh2+ 47.Kg8 Qg3+ 48.Kh7 Qh3+ 49.Kg8 Qg4+ 50.Kh7 Qf5+ 51.Kg8
 43/115-	00:56	2,199,627,181	38,610,949	-24.62	1.Kf7 Bc3
 43/115+	00:57	2,225,328,744	38,555,194	-24.32	1.Kf7
 43/115-	00:57	2,225,632,530	38,555,114	-24.62	1.Kf7 Bc3
 43/115-	00:58	2,275,880,193	38,582,741	-25.26	1.Kf7 Bc3
 43/115+	00:59	2,311,025,703	38,602,664	-24.32	1.Kf7
 43/115-	00:59	2,313,376,236	38,602,593	-25.33	1.Kf7 Bc3
 43/115-	01:01	2,386,129,204	38,671,202	-27.77	1.Kf7 Bc3
 43/115+	01:01	2,389,064,648	38,673,648	-26.87	1.Kf7
 43/115+	01:01	2,389,465,600	38,673,878	-23.16	1.Kf7
 43/115-	01:01	2,389,983,066	38,674,742	-24.89	1.Kf7 Bc3
 43/115-	01:23	3,245,181,772	39,013,497	-110.25	1.Kf7 Bc3
 43/115	01:29	3,480,941,388	38,970,705	-123.00	1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qe8+ Kd6 11.Qe7+ Kc6 12.Qe8+ Kc5 13.Qb8 Kd4 14.Qh2 Kc4 15.Qe2+ Kb4 16.Qh2 Kb3 17.Qb8+ Kc2 18.Qc8+ Kd2 19.Qb7 d4 20.Qg2+ Kc3 21.Kg8 Qe3 22.f7 Qe6 23.Qg7 Ba3 24.Kh8 Qd5 25.Qf6 Qd6 26.Qf2 d3 27.Kh7 Qe6 28.Qf3 Kc2 29.Kg7 Qc4 30.Qf5 Qc3+ 31.Kh7 Kb2 32.Kg6 Qc6+ 33.Kh7 d2 34.Qd3 Qh1+ 35.Kg7 d1Q 36.Qb5+ Ka2 37.Qc4+ Ka1 38.Qc3+ Bb2
 44/115+	01:31	3,553,196,818	38,976,731	-122.20	1.Kf7
 44/115+	01:31	3,553,553,307	38,976,366	-122.12	1.Kf7
 44/115+	01:31	3,553,598,418	38,976,434	-121.32	1.Kf7
 44/115-	01:31	3,553,879,160	38,976,093	-122.29	1.Kf7 Bc3
 44/115-	01:33	3,658,802,863	39,012,665	-123.15	1.Kf7 Bc3
 44/115+	01:34	3,689,924,248	39,033,186	-122.49	1.Kf7
 44/115+	01:34	3,709,371,297	39,052,179	-121.06	1.Kf7
 44/115-	01:34	3,709,818,932	39,052,369	-122.54	1.Kf7 Bc3
 44/115+	01:35	3,738,804,560	39,064,702	-121.06	1.Kf7
 44/115-	01:35	3,738,869,332	39,064,971	-122.47	1.Kf7 Bc3
 44/115+	01:36	3,772,935,766	39,088,463	-121.06	1.Kf7
 44/115-	01:36	3,773,057,487	39,088,509	-122.61	1.Kf7 Bc3
 44/115+	01:37	3,802,488,195	39,099,331	-120.70	1.Kf7
 44/115-	01:37	3,802,608,469	39,099,362	-123.00	1.Kf7 Bc3
 44/115-	01:38	3,852,212,782	39,116,304	-127.10	1.Kf7 Bc3
 44/115	02:17	5,330,994,484	38,780,176	-128.18	1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qe8+ Kd6 11.Qe7+ Kc6 12.Qe6+ Kc5 13.Qc8+ Kd4 14.Qg4+ Kc3 15.Qf3+ Kc4 16.Qg4+ d4 17.Kg8 Kc3 18.f7 Ba3 19.Qf3+ Qe3 20.Qc6+ Kd2 21.Qg2+ Qe2 22.Qg5+ Kc2 23.Qg3 Qe7 24.Qg2+ Kc3 25.Qg7 Qd8+ 26.Kh7 Qd5 27.Qf6 Kc2 28.Qf2+ Kb3 29.Qf1 d3 30.Qd1+ Kc3 31.Kg8 Qg5+ 32.Kh7 Qf5+ 33.Kg7 d2 34.Qa4 Bb4 35.Qa1+ Kb3 36.Qg1 Qc2 37.Kg8 d1Q 38.Qe3+ Qc3 39.Qe6+ Kb2 40.Qh6 Qd8+ 41.f8R Qxf8+
 45/115	02:21	5,487,737,624	38,765,612	-128.18	1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qe8+ Kd6 11.Qe7+ Kc6 12.Qe6+ Kc5 13.Qc8+ Kd4 14.Qg4+ Kc3 15.Qf3+ Kc4 16.Qg4+ d4 17.Kg8 Kc3 18.f7 Ba3 19.Qf3+ Qe3 20.Qc6+ Kd2 21.Qg2+ Qe2 22.Qg5+ Kc2 23.Qg3 d3 24.Qc7+ Kb1 25.Qb7+ Qb2 26.Qe4 Qc3 27.Kh7 Qc2 28.Qh1+ Kb2 29.Qb7+ Ka1 30.Qe4 Qh2+ 31.Kg8 Qb8+ 32.Kh7 d2 33.Qf3 Qb1+ 34.Kh6 Bf8+ 35.Kg5 d1Q 36.Qc3+ Qb2 37.Qa5+ Kb1 38.Qf5+ Kc1 39.Qc8+ Qbc2 40.Qc6 Qxc6
 46/115	02:25	5,627,814,726	38,747,046	-128.18	1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qe8+ Kd6 11.Qe7+ Kc6 12.Qe8+ Kc5 13.Qc8+ Kd4 14.Qg4+ Kc3 15.Qf3+ Kc4 16.Qg4+ d4 17.Kg8 Kc3 18.f7 Ba3 19.Qf3+ Qe3 20.Qc6+ Kd2 21.Qg2+ Qe2 22.Qg5+ Kc2 23.Qh4 Qg2+ 24.Kh7 Qd5 25.Qh2+ Kc3 26.Qc7+ Qc4 27.Qa5+ Kc2 28.Qh5 d3 29.Qf5 Bb4 30.Kg6 Kb2 31.Qf2+ Qc2 32.Qd4+ Qc3 33.Qb6 Kc2 34.Qb7 d2 35.Qg2 Kc1 36.Qg5 Qc5 37.Qg4 d1Q 38.Qf4+ Kb2 39.Qf6+ Bc3 40.Kh7 Bxf6
 47/115	02:25	5,644,318,758	38,749,425	-128.18	1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qe8+ Kd6 11.Qe7+ Kc6 12.Qe8+ Kc5 13.Qc8+ Kd4 14.Qg4+ Kc3 15.Qf3+ Kc4 16.Qg4+ d4 17.Kg8 Kc3 18.f7 Ba3 19.Qf3+ Qe3 20.Qc6+ Kd2 21.Qg2+ Qe2 22.Qg5+ Kc2 23.Qf4 Qg2+ 24.Kh7 Qd5 25.Qh2+ Kc3 26.Qc7+ Qc4 27.Qa5+ Kc2 28.Qh5 d3 29.Qf5 Bb4 30.Kg6 Kb2 31.Qf2+ Qc2 32.Qd4+ Qc3 33.Qb6 Kc2 34.Qb7 d2 35.Qg2 Kc1 36.Qg5 Qc5 37.Qg4 d1Q 38.Qf4+ Kb2 39.Qf6+ Bc3 40.Kh7 Bxf6
 48/115	02:30	5,818,253,844	38,553,184	-128.18	1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qe8+ Kd6 11.Qe7+ Kc6 12.Qe8+ Kc5 13.Qc8+ Kd4 14.Qg4+ Kc3 15.Qg3+ Kc4 16.Qg4+ d4 17.Kg8 Kc3 18.f7 Ba3 19.Qf3+ Qe3 20.Qc6+ Kd2 21.Qg2+ Qe2 22.Qg5+ Kc2 23.Qf4 Qg2+ 24.Kh7 Qd5 25.Qh2+ Kc3 26.Qc7+ Qc4 27.Qa5+ Kc2 28.Qh5 d3 29.Qf5 Bb4 30.Kg6 Kb2 31.Qf2+ Qc2 32.Qd4+ Qc3 33.Qb6 Kc2 34.Qb7 d2 35.Qg2 Kc1 36.Qg5 Qc5 37.Qg4 d1Q 38.Qf4+ Kb2 39.Qf6+ Bc3 40.Kh7 Bxf6
 49/115	02:36	6,006,754,248	38,461,688	-128.18	1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qe8+ Kd6 11.Qe7+ Kc6 12.Qe8+ Kc5 13.Qc8+ Kd4 14.Qg4+ Kc3 15.Qg3+ Kc4 16.Qg4+ d4 17.Kg8 Kc3 18.f7 Ba3 19.Qf3+ Qe3 20.Qc6+ Kd2 21.Qg2+ Qe2 22.Qg5+ Kc2 23.Qf4 Qg2+ 24.Kh7 Qd5 25.Qh2+ Kc3 26.Qc7+ Qc4 27.Qa5+ Kc2 28.Qh5 d3 29.Qf5 Bb4 30.Kg6 Kb2 31.Qf2+ Qc2 32.Qd4+ Qc3 33.Qb6 Kc2 34.Qb7 d2 35.Qg2 Kc1 36.Qg5 Qc5 37.Qg4 d1Q 38.Qf4+ Kb2 39.Qf6+ Bc3 40.Kh7 Bxf6
 50/115	02:45	6,348,511,288	38,432,036	-128.18	1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qe8+ Kd6 11.Qe7+ Kc6 12.Qe8+ Kc5 13.Qc8+ Kd4 14.Qg4+ Kc3 15.Qf3+ Kc4 16.Qg4+ d4 17.Kg8 Kc3 18.f7 Ba3 19.Qf3+ Qe3 20.Qc6+ Kd2 21.Qg2+ Qe2 22.Qg5+ Kc2 23.Qf4 Qg2+ 24.Kh7 Qd5 25.Qh2+ Kc3 26.Qc7+ Qc4 27.Qa5+ Kc2 28.Qh5 d3 29.Qf5 Bb4 30.Kg6 Kb2 31.Qf2+ Qc2 32.Qd4+ Qc3 33.Qb6 Kc2 34.Qb7 d2 35.Qg2 Kc1 36.Qg5 Qc5 37.Qg4 d1Q 38.Qf4+ Kb2 39.Qf6+ Bc3 40.Kh7 Bxf6
 51/115	02:54	6,700,761,980	38,413,430	-128.18	1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qe8+ Kd6 11.Qe7+ Kc6 12.Qe8+ Kc5 13.Qc8+ Kd4 14.Qg4+ Kc3 15.Qf3+ Kc4 16.Qg4+ d4 17.Kg8 Kc3 18.f7 Ba3 19.Qf3+ Qe3 20.Qc6+ Kd2 21.Qg2+ Qe2 22.Qg5+ Kc2 23.Qf4 Qg2+ 24.Kh7 Qd5 25.Qh2+ Kc3 26.Qc7+ Qc4 27.Qa5+ Kc2 28.Qh5 d3 29.Qf5 Bb4 30.Kg6 Kb2 31.Qf2+ Qc2 32.Qd4+ Qc3 33.Qb6 Kc2 34.Qb7 d2 35.Qg2 Kc1 36.Qg5 Qc5 37.Qg4 d1Q 38.Qf4+ Kb2 39.Qf6+ Bc3 40.Kh7 Bxf6
 52/115	03:02	6,995,775,915	38,383,706	-128.18	1.Kf7 Bc3 2.d5 exd5 3.g6 Bh8 4.Kg8 Bb2 5.Kf7 c5 6.f5 c4 7.f6 c3 8.g7 c2 9.g8Q c1Q 10.Qe8+ Kd6 11.Qe7+ Kc6 12.Qe8+ Kc5 13.Qc8+ Kd4 14.Qg4+ Kc3 15.Qf3+ Kc4 16.Qg4+ d4 17.Kg8 Kc3 18.Qg2 Qe3 19.Qc6+ Kd2 20.Qg2+ Qe2 21.Qg5+ Kc2 22.f7 Ba3 23.Qf4 Qg2+ 24.Kh7 Qd5 25.Qh2+ Kc3 26.Qc7+ Qc4 27.Qa5+ Kc2 28.Qh5 d3 29.Qf5 Bb4 30.Kg6 Kb2 31.Qf2+ Qc2 32.Qd4+ Qc3 33.Qb6 Kc2 34.Qb7 d2 35.Qg2 Kc1 36.Qg5 Qc5 37.Qg4 d1Q 38.Qf4+ Kb2 39.Qf6+ Bc3 40.Kh7 Bxf6
i7-5930K @4.5GHz, H100i Hydro Cooler, 64GB DDR4 Corsair Dominator Platinum @3000MHz, ASUS X99 Deluxe mboard, 1TB EVO 850 SSD
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MikeGL
Posts: 1010
Joined: Thu Sep 01, 2011 2:49 pm

Re: Can your program see the draw?

Post by MikeGL »

Milos wrote:
MikeGL wrote:The final mating line looks incorrect, probably a bug?
50/85 6:03:48 874'967'291k 40'148k -128.30 Rf5 Qc3+ Kg8 Ke4 Rd5 h3 Kf8 g4 Ke7 Kf3 Kf8 Qb3 hxg4+ hxg4 Rd8 Qc3 Kg8 Ke4 Rd5 Qa1 Rb5 Qd4 Kf8 Qa4 Rd5 Qa8+ Ke7 Qb8 Rd1 Ke3 Rd5 f5 *gxf5* g5 Rd6 Qa7+ Rd7 Qa3+ Ke8 Qc3 Rd1 g6 fxg6 Qf6 Re1+ Kd4 Rd1+ Ke5 Re1+ Kd6 Rd1+ Kxe6

see the bold gxf5 above, that move loses but exf5 instead of gxf5 can hold and maintain the fortress. 1/2 - 1/2 I guess

[D]1Q6/4kp2/4p1p1/3r1P2/6P1/4K3/8/8 b - - 0 17

Check the above position, if eval function kicks in, then gxf5 is the normal move for engines which loses as shown by your line. But actually exf5 can hold a draw.
Gee do you know how engine works? 30 plies down the PV is certainly rubbish, especially in analysis on many cores and even more so in analysis with TBs, so analysing that it completely pointless.
Score 128 in practice means chance that SF will mate is 99.9999999% (a lot of nines) and probability of actually having a fortress is non-existent. But anyway, trying to prove stupid humans (compared to engines) wrong is total waste of time so please continue believing in imaginary fortresses, NLOs, monster from Loch Ness, Santa or whichever thing empowers you, but don't expect anyone wasting time trying to prove you wrong...
I don't exactly know how engine works, but do you? You do understand that engines can claim a mate at shallow depth and then later change its mind and replaces the -128.0 or other mate score to something lower like -45.0 or other values at a higher depth once it saw a refutation against the mate down the line? How about we don't resort to name calling and post the winning line of the position after exf5 for the sake of argument?

Already pointed out by one programmer here at talkchess with regards to shirov Bh3!! topic where Stockfish even claimed +28.0 but was a drawn line. So yes, you can also believe on your almighty perfectly flawless chess engines if you like.

I didn't study the above line to prove you're wrong, I just happen to analyze the game and variation you've posted because I want to learn how to break fortresses on my own game.
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MikeB
Posts: 4889
Joined: Thu Mar 09, 2006 6:34 am
Location: Pen Argyl, Pennsylvania

Re: Can your program see the draw?

Post by MikeB »

MikeGL wrote: The final mating line looks incorrect, probably a bug?
50/85 6:03:48 874'967'291k 40'148k -128.30 Rf5 Qc3+ Kg8 Ke4 Rd5 h3 Kf8 g4 Ke7 Kf3 Kf8 Qb3 hxg4+ hxg4 Rd8 Qc3 Kg8 Ke4 Rd5 Qa1 Rb5 Qd4 Kf8 Qa4 Rd5 Qa8+ Ke7 Qb8 Rd1 Ke3 Rd5 f5 *gxf5* g5 Rd6 Qa7+ Rd7 Qa3+ Ke8 Qc3 Rd1 g6 fxg6 Qf6 Re1+ Kd4 Rd1+ Ke5 Re1+ Kd6 Rd1+ Kxe6

see the bold gxf5 above, that move loses but exf5 instead of gxf5 can hold and maintain the fortress. 1/2 - 1/2 I guess

[D]1Q6/4kp2/4p1p1/3r1P2/6P1/4K3/8/8 b - - 0 17

Check the above position, if eval function kicks in, then gxf5 is the normal move for engines which loses as shown by your line. But actually exf5 can hold a draw.
that's not accurate...

[d]1Q6/4kp2/6p1/3r1p2/6P1/4K3/8/8 w - - 0 1

Code: Select all

info depth 14 seldepth 24 multipv 1 score cp 12845 nodes 347086 nps 16527904 tbhits 5120 time 21 pv b8b7 d5d7 b7b4 d7d6 e3f4 f7f6 g4g5 e7e6 g5f6 d6d7 f6f7 d7d8 f7f8n e6f6 f8g6
..
 info depth 52 seldepth 24 multipv 1 score cp 12845 nodes 236840977 nps 31519959 hashfull 111 tbhits 10285059 time 7514 pv b8b7 d5d7 b7b4 d7d6 g4f5 g6g5 f5f6 e7e6 b4c5 g5g4 e3f4 e6d7 f4g4
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MikeGL
Posts: 1010
Joined: Thu Sep 01, 2011 2:49 pm

Re: Can your program see the draw?

Post by MikeGL »

MikeB wrote:
MikeGL wrote: The final mating line looks incorrect, probably a bug?
50/85 6:03:48 874'967'291k 40'148k -128.30 Rf5 Qc3+ Kg8 Ke4 Rd5 h3 Kf8 g4 Ke7 Kf3 Kf8 Qb3 hxg4+ hxg4 Rd8 Qc3 Kg8 Ke4 Rd5 Qa1 Rb5 Qd4 Kf8 Qa4 Rd5 Qa8+ Ke7 Qb8 Rd1 Ke3 Rd5 f5 *gxf5* g5 Rd6 Qa7+ Rd7 Qa3+ Ke8 Qc3 Rd1 g6 fxg6 Qf6 Re1+ Kd4 Rd1+ Ke5 Re1+ Kd6 Rd1+ Kxe6

see the bold gxf5 above, that move loses but exf5 instead of gxf5 can hold and maintain the fortress. 1/2 - 1/2 I guess

[D]1Q6/4kp2/4p1p1/3r1P2/6P1/4K3/8/8 b - - 0 17

Check the above position, if eval function kicks in, then gxf5 is the normal move for engines which loses as shown by your line. But actually exf5 can hold a draw.
that's not accurate...

[d]1Q6/4kp2/6p1/3r1p2/6P1/4K3/8/8 w - - 0 1

Code: Select all

info depth 14 seldepth 24 multipv 1 score cp 12845 nodes 347086 nps 16527904 tbhits 5120 time 21 pv b8b7 d5d7 b7b4 d7d6 e3f4 f7f6 g4g5 e7e6 g5f6 d6d7 f6f7 d7d8 f7f8n e6f6 f8g6
..
 info depth 52 seldepth 24 multipv 1 score cp 12845 nodes 236840977 nps 31519959 hashfull 111 tbhits 10285059 time 7514 pv b8b7 d5d7 b7b4 d7d6 g4f5 g6g5 f5f6 e7e6 b4c5 g5g4 e3f4 e6d7 f4g4

Noted. Thanks for the clarification.
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