Test Position: Rook Sac from WCRCC 2013

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Vinvin
Posts: 4784
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Test Position: Rook Sac from WCRCC 2013

Post by Vinvin » Mon Jul 22, 2013 11:57 pm

So, NightmareX made only draw from a +1.91 advantage :evil:
kgburcham wrote:
Stockfish switches to Bh5+. Do Rybka and Houdini do so too?
6 processor(s) found, POPCNT available
NUMA configuration with 1 node(s), offset 0
Engine: Houdini 3 Pro x64 (4096 MB)
by Robert Houdart

27 22:31 +1.91 25.Rxf6 gxf6 (24.783.331.055) 18336
27 22:31 +0.56 25.Bh5+ Ke7 (24.783.331.055) 18336
27 22:31 +0.33 25.Qg3 Kf7 (24.783.331.055) 18336

Vinvin
Posts: 4784
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Test Position: Rook Sac from WCRCC 2013

Post by Vinvin » Mon Dec 23, 2019 12:08 pm

I came across this thread by accident.
I reran the position and found that Rxf6 eval is 3rd on depth 45 (probably because a lot of piece exchange that give a drawish position)
There are a lot of up and down with 3 best moves.

FEN: r3kb1r/1p4pp/2q1pp2/1p2Q3/8/2P5/PP2B1PP/R4R1K w kq - 0 1

Stockfish_19121008_x64_modern:

Code: Select all

...
---------------------------------------------------------------------------
 30/23	00:56	 451 048 205	8 007 388	 0,00	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bxh5+ Kg8 5.Rxf6 Be7 6.Qg6 Bxf6 7.Qf7+ Kh7 8.Re3 Qe8 9.Rh3 Kh6 10.Bg6+ Kg5 11.Rg3+ Kh6
 30/54	00:56	 451 048 205	8 007 388	+0,78	1.Bh5+ Ke7 2.Rad1 Rd8 3.Qf4 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Bxb7 Rd8 9.Bf3 Rxd1+ 10.Bxd1 Qc5 11.Qxc5 Bxc5 12.a4 Be3 13.a5 Ke7 14.b4 e5 15.c4 Kd6 16.c5+ Kc7 17.a6 f5 18.Bb3 e4 19.g4 Bd4 20.gxf5 gxf5
 30/60	00:56	 451 048 205	8 007 388	+1,04	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kh7 20.Qf7+ Kh6 21.g4 e4 22.Qf4+ Kg7 23.Kg2 Qd5 24.Kf2 g5 25.Qe3
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 31/40	01:06	 532 263 036	8 027 494	+0,14	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Rd1 Kg8 5.Bxb5 fxg5 6.Bxc6 bxc6 7.Rxd6 Rxa2 8.b4 Kh7 9.h3 c5 10.Rxe6 cxb4 11.cxb4 Rb8 12.Rf5 g4 13.Rxh5+ Kg8 14.hxg4 Rxb4 15.Rg5 Rf4 16.Rb6 Rf1+ 17.Kh2 Rf4 18.Rb8+ Rf8 19.Rxf8+ Kxf8
 31/68	01:06	 532 263 036	8 027 494	+0,59	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qh7 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Qe1+ 13.Kh2 Rxf8 14.Qxf8 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kg5 20.Qe7+ Kf5 21.Qf7+ Kg5 22.Kg2 Qd2+ 23.Qf2 Qd5+ 24.Kh2 Qd3 25.Qe1 e4 26.Qf2 Kh6 27.Kg2 Kh7 28.Qf7+ Kh8 29.Qf4 Kg8 30.h4 Kg7 31.a3 Kh7 32.Qf7+ Kh6 33.Qf2 Kh7 34.g4 Kg8
 31/70	01:06	 532 263 036	8 027 494	+0,87	1.Bh5+ Ke7 2.Rad1 Rd8 3.Qf4 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Bxb7 Rd8 9.Bf3 Rxd1+ 10.Bxd1 Qc5 11.Qxc5 Bxc5 12.a4 Be3 13.a5 f5 14.b4 Ke7 15.a6 Kd6 16.c4 Kc7 17.c5 Kb8 18.g4 e5 19.Kg2 e4 20.h4 Ka7 21.gxf5 gxf5 22.Be2 f4 23.c6
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 32/54	01:34	 754 701 936	7 973 860	 0,00	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Re8 6.Be4 Qc4 7.Qb6 Qc7 8.Qxb5 Re7 9.h3 f5 10.Bc2 Rh6 11.Qe2 g6 12.Bb3 Kg7 13.Qe3 Rh8 14.Qg5 Rhe8 15.Bd1 Kh7 16.Bxh5 gxh5 17.Qxh5+ Kg7 18.Qg5+ Kh7
 32/58	01:34	 754 701 936	7 973 860	+0,84	1.Bh5+ Ke7 2.Rad1 Rd8 3.Qf4 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Bxb7 Rd8 9.Bf3 Rxd1+ 10.Bxd1 Qc5 11.Qxc5 Bxc5 12.a4 Ke7 13.b4 Be3 14.a5 f5 15.a6 Kd7 16.Bb3 Kc6 17.Bxe6 Kb5 18.Bg8 h5 19.Bh7 g5 20.Bxf5 Kxa6 21.Be4 Kb6
 32/80	01:34	 754 701 936	7 973 860	+0,89	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kh7 20.Qe7+ Kg8 21.Qxe5 Qc2+ 22.Kg1 Qxb2 23.Qb8+ Kh7 24.Qxb7+ Kh6 25.Qf3 Kg7 26.h4 Qxa2
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 33/53	01:44	 836 707 356	7 979 584	 0,00	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Re8 6.Be4 Qc7 7.Bg6 Re7 8.Rd1 h4 9.h3 Rh6 10.Rxf6 gxf6 11.Qxh6 Qc5 12.Qxh4 Qe5 13.Kg1 Qh2+ 14.Kf2 Rg7 15.Qe4 Kf8 16.Rd3 Be7 17.Rf3 Qd6 18.h4 Qd2+ 19.Kg1 Qd1+ 20.Kf2
 33/71	01:44	 836 707 356	7 979 584	+0,30	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kg5 20.Qe7+ Kf5 21.g4+ Ke4 22.Qf6 Qe2+ 23.Kg3 Qe3+ 24.Kg2 Qe2+ 25.Qf2 Qxf2+ 26.Kxf2 Kd3 27.h4 Kd2 28.Kf3 Kd3 29.Kg2 e4 30.h5 gxh5 31.gxh5 e3 32.h6
 33/52	01:44	 836 707 356	7 979 584	+0,90	1.Bh5+ Ke7 2.Rad1 Rd8 3.Qf4 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Qxb7 Qxb7 9.Bxb7 Rb8 10.Rd7 Rd8 11.Rxd8 Bxd8 12.a4 f5 13.Kg1 Bc7 14.Kf2 Ke7 15.g3 f4 16.gxf4 Bxf4 17.Ke2 Bxh2 18.a5 h5 19.b4 Be5 20.Kd3 Bb8 21.b5 h4 22.c4
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 34/48	02:14	1 067 404 514	7 948 029	+0,30	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Re8 6.Be4 Qc4 7.Bxb7 Re7 8.Be4 h4 9.Bd3 Qd5 10.Qh3 Qxa2 11.Bxb5 Qb3 12.Qd3 h3 13.gxh3 Bc7 14.Re2 Rh5 15.Bc6 Rc5 16.Bf3 Ra5 17.Qe4 Kh8 18.Qg6 Qb5 19.Rd1
 34/68	02:14	1 067 404 514	7 948 029	+0,84	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kg5 20.Qe7+ Kf5 21.Qxb7 e4 22.Qf7+ Ke5 23.Qf4+ Ke6 24.Qg4+ Kf6 25.Kg2 Qc2+ 26.Kf1 Qxb2 27.Qxe4 Qxc3 28.Kf2 Kg7 29.h4 Qf6+ 30.Qf3 Qb2+ 31.Qe2 Qf6+ 32.Kg2 Qc6+ 33.Kh2 Qc5 34.Qg2 Qe5 35.Qf2
 34/56	02:14	1 067 404 514	7 948 029	+0,96	1.Bh5+ Ke7 2.Qf4 Rd8 3.Rae1 Qc5 4.Rd1 Rxd1 5.Rxd1 g6 6.Be2 Kf7 7.Qb8 Rg8 8.Qxb7+ Be7 9.Qxb5 Rd8 10.Qxc5 Rxd1+ 11.Qg1 Rxg1+ 12.Kxg1 Bd8 13.a4 Bc7 14.Kf2 f5 15.Bb5 h5 16.h3 g5 17.Ke3 g4 18.hxg4 hxg4 19.b4 Be5 20.Kd3 g3
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 35/49	03:25	1 628 627 002	7 938 713	 0,00	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bxh5+ Kg8 5.Rxf6 Be7 6.Qg6 Bxf6 7.Qf7+ Kh7 8.Qg6+
 35/72	03:25	1 628 627 002	7 938 713	+0,29	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh5 19.Qf6 Qd2+ 20.Kg1 Qc1+ 21.Qf1 Qxb2 22.Qe1 Kh6 23.Qxe5 Kh7 24.Qc7+ Kh6 25.Qf4+ Kg7 26.Qd4+ Kh7 27.h4 Qxa2 28.Qd7+ Kh6 29.Qd3 Kh7 30.Qxb5 Qa1+ 31.Kg2 Qxc3 32.Qxb7+ Kh6
 35/60	03:25	1 628 627 002	7 938 713	+0,71	1.Bh5+ Ke7 2.Qf4 Rd8 3.Rac1 Rd7 4.Rcd1 Rxd1 5.Rxd1 g6 6.Bf3 Qc8 7.Qb4+ Kf7 8.Qxb5 Be7 9.Bxb7 Rd8 10.Re1 Qc7 11.Bf3 Bd6 12.g3 h5 13.Rd1 Be5 14.Rxd8 Qxd8 15.a4 h4 16.a5 hxg3 17.hxg3 Bxg3 18.Qb7+ Kf8 19.Kg2 Be5 20.a6 Qd2+ 21.Kf1 Bg3 22.Qb4+ Bd6 23.a7 Qc1+ 24.Ke2 Bxb4 25.a8Q+ Kf7 26.cxb4 Qxb2+ 27.Kf1 Qxb4
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 36/66	03:41	1 757 834 704	7 945 518	+0,30	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qh7 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Qe1+ 13.Kh2 Rxf8 14.Qxf8 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh5 19.Qf6 Qd2+ 20.Kg1 Qc1+ 21.Qf1 Qxb2 22.Qe1 e4 23.Qxe4 Kh6 24.Qe5 Kh7 25.Qc7+ Kh6 26.Qxb7 Qxa2 27.Qc7 Qe2 28.Qf4+ Kg7 29.Qd4+ Kg8 30.Qf2 Qd3 31.Qe1 Kh7 32.Qe7+ Kg8 33.Qe5
 36/54	03:41	1 757 834 704	7 945 518	+0,40	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Re8 6.Bg6 Re7 7.Rd1 h4 8.Be4 Qc7 9.Qd3 Rd7 10.Qxb5 Rh6 11.h3 f5 12.Bc2 Re7 13.Rd4 Bg3 14.Rfd1 Qe5 15.Rd8+ Kf7 16.Qd3 Bf2 17.Rd7 Rxd7 18.Qxd7+ Kg6 19.Bd3 Qd5 20.Qxd5 exd5 21.Bc2 d4 22.cxd4 Kg5 23.d5
 36/65	03:41	1 757 834 704	7 945 518	+0,77	1.Bh5+ Ke7 2.Qf4 Rd8 3.Rad1 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Bxb7 Rd8 9.Re1 Qc7 10.Bf3 Bd6 11.g3 h5 12.a4 f5 13.Rd1 Be7 14.Rxd8 Bxd8 15.Kg2 h4 16.Qb7 Qxb7 17.Bxb7 hxg3 18.hxg3 Ke7 19.b4 Kd7 20.c4 Bf6 21.Bf3 Kc7 22.c5 Bc3 23.b5 Bd4
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 37/78	04:14	2 022 121 824	7 955 377	+0,29	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qh7 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Qe1+ 13.Kh2 Rxf8 14.Qxf8 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh5 19.Qf6 Qd2+ 20.Kg1 Qc1+ 21.Qf1 Qxb2 22.Qe1 Kh6 23.Qxe5 Kh7 24.Qc7+ Kh6 25.Qf4+ Kg7 26.Qd4+ Kh7 27.h4 Qa1+ 28.Kg2 Qxa2+ 29.Qf2 Qe6 30.Qf3 Qa2+ 31.Kh3 Qe6+ 32.g4 Qc6 33.Qe3 Qd6 34.Kg2 Qc6+ 35.Kg3 Qd6+ 36.Qf4 Qe7 37.Kh3 Qd7
 37/60	04:14	2 022 121 824	7 955 377	+0,38	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Re8 6.Bg6 Re7 7.Rd1 h4 8.Be4 Qc7 9.Qd3 Rd7 10.Qxb5 h3 11.g3 Kf7 12.Rd4 Ke7 13.Rfd1 Rhd8 14.a4 Qc5 15.Qxc5 Bxc5 16.Rxd7+ Rxd7 17.Rxd7+ Kxd7 18.Bxb7 Be3 19.Ba6 g5 20.g4 Bc1 21.b3 Bd2 22.Bf1 Bxc3 23.Bxh3 e5 24.Bf1
 37/63	04:14	2 022 121 824	7 955 377	+0,80	1.Bh5+ Ke7 2.Qf4 Rd8 3.Rad1 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Bxb7 Rd8 9.Re1 Qc7 10.Bf3 Bd6 11.g3 h5 12.a4 f5 13.Rd1 Be7 14.Rxd8 Bxd8 15.Qc6 Qxc6 16.Bxc6 Ke7 17.b4 Kd6 18.Be8 Bf6 19.Bxg6 Bxc3 20.b5 Kc5 21.Kg2 Bd4 22.Bxh5 Kb4 23.Bd1 e5 24.Kf3 Kc4 25.h4
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 38/70	05:08	2 452 855 229	7 958 957	+0,44	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Re8 6.Bg6 Re7 7.Rd1 h4 8.Be4 Qc7 9.Qd3 Rd7 10.Qxb5 h3 11.g3 Kf7 12.Rd4 Ke7 13.Rfd1 Rhd8 14.a4 g5 15.Bf3 Be5 16.Rxd7+ Rxd7 17.Qxd7+ Qxd7 18.Rxd7+ Kxd7 19.Bxb7 g4 20.Ba6 Bb8 21.Kg1 Ba7+ 22.Kf1 f5 23.Bd3 Be3 24.a5 Kc6 25.a6 Kb6 26.Bc4 f4 27.Bxe6 fxg3 28.hxg3 Bc1 29.b4 Bd2 30.Bxg4 Bxc3 31.Bxh3 Bxb4
 38/61	05:08	2 452 855 229	7 958 957	+0,58	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qh7 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kg5 20.Qe7+ Kf5 21.Qxb7 e4 22.Qf7+ Ke5 23.Qf4+ Ke6 24.Qg4+ Kf6 25.Kg1 Qb1+ 26.Kf2 Qxb2+ 27.Qe2 Qxc3 28.Qxe4 Qd2+ 29.Qe2
 38/61	05:08	2 452 855 229	7 958 957	+0,97	1.Bh5+ Ke7 2.Qf4 Rd8 3.Rad1 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Bxb7 Rd8 9.Re1 Qb8 10.Ba6 Bd6 11.Qxb8 Rxb8 12.Re2 e5 13.Bc4+ Ke7 14.Kg1 f5 15.a4 Ra8 16.Bb5 e4 17.Kf2 Bc5+ 18.Ke1 Bd6 19.g3 h5 20.Kd2 Be5 21.Kc2 Rh8 22.a5 h4 23.gxh4 Rxh4 24.a6 Bb8 25.c4 Rxh2 26.Rxh2
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 39/69	06:31	3 115 829 100	7 965 877	 0,00	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Re8 6.Bg6 Re7 7.Rd1 h4 8.Be4 Qc7 9.Qd3 Rd7 10.Qxb5 Kf7 11.Rd4 Ke7 12.Rc4 Qb8 13.Rd4
 39/77	06:31	3 115 829 100	7 965 877	+0,72	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kg5 20.Qe7+ Kf5 21.Qxb7 e4 22.Qf7+ Ke5 23.Qf4+ Ke6 24.Qg4+ Kf7 25.Kg2 Qc2+ 26.Kf1 Qxb2 27.Qd7+ Kg8 28.Qc8+ Kh7 29.Qb7+ Kh6 30.Qxe4 Qxc3 31.Kf2 Qb2+ 32.Qe2 Qf6+ 33.Kg2 Qc6+ 34.Qf3
 39/61	06:31	3 115 829 100	7 965 877	+0,84	1.Bh5+ Ke7 2.Qf4 Rd8 3.Rad1 Rxd1 4.Rxd1 g6 5.Bf3 Qc4 6.Qb8 Kf7 7.h3 Kg7 8.Qxb7+ Kh6 9.Qd7 Qf4 10.Qxe6 Bc5 11.Qg4 Qxg4 12.Bxg4 Re8 13.Bd7 Re2 14.b4 Be3 15.Bxb5 Rxa2 16.Rb1 Kg5 17.c4 Bd4 18.c5 Ra1 19.Rxa1 Bxa1 20.Ba4 Kf5 21.g3 Be5 22.Bb3 Ke4 23.b5 Bxg3 24.b6 Ke3
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 40/52	07:14	3 478 976 537	8 005 910	+0,23	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Re8 6.Bg6 Re7 7.Rd1 h4 8.Be4 Qc7 9.Qd3 Rd7 10.Qxb5 Kf7 11.Rd4 Ke7 12.Rfd1 Rdd8 13.Rc4 Qb8 14.h3 Bg3 15.Rcd4 Rxd4 16.Rxd4 Rd8 17.Rxd8 Qxd8 18.Qxb7+ Kf8 19.Qb4+ Kf7 20.Qd4 Qxd4 21.cxd4 Ke7 22.a4 Bf2 23.d5 exd5 24.Bxd5 Kd6 25.Be4 Ke5 26.Bd3
 40/99	07:14	3 478 976 537	8 005 910	+0,24	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qh7 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Qe1+ 13.Kh2 Rxf8 14.Qxf8 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kg5 20.Qe7+ Kf5 21.Qf7+ Kg5 22.Kg2 Qe2+ 23.Qf2 Qe4+ 24.Kh2 Qd3 25.a3 Kh6 26.Kg2 Qe4+ 27.Qf3 Qc2+ 28.Kf1 Qxb2 29.Qe3+ Kh7 30.Qxe5 Qxa3 31.Ke2 Qb2+ 32.Kf3 Qd2 33.g4 Qd3+ 34.Qe3 Qd6 35.Kg2 b4 36.cxb4 Qxb4 37.Kf3 Qd6 38.h4 Qb4 39.Qe5 Qc4
 40/68	07:14	3 478 976 537	8 005 910	+0,70	1.Bh5+ Ke7 2.Qf4 Rd8 3.Rad1 Rxd1 4.Rxd1 g6 5.Bf3 Qc4 6.Qb8 Kf7 7.h3 Kg7 8.Qxb7+ Kh6 9.Qd7 Qf4 10.Qxe6 Bc5 11.Qg4 Qxg4 12.Bxg4 Re8 13.Bd7 Re2 14.b4 Be3 15.Bxb5 Rxa2 16.Rb1 Kg5 17.c4 Rc2 18.c5 Kf4 19.Be8 Ke5 20.Bf7 Rc1+ 21.Rxc1 Bxc1 22.Bg8 Bd2 23.b5 Kd4 24.b6 Kxc5 25.b7 Bf4 26.Bxh7 Kb6 27.b8Q+ Bxb8
---------------------------------------------------------------------------
 41/50	07:53	3 805 987 434	8 040 535	+0,19	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Re8 6.Bg6 Re7 7.Rd1 h4 8.Be4 Qc7 9.Qd3 Rd7 10.Qxb5 Kf7 11.Rd4 Ke7 12.Rfd1 Rdd8 13.Rc4 Qb8 14.h3 Bg3 15.Rcd4 Rxd4 16.Rxd4 Rd8 17.Rxd8 Qxd8 18.Qxb7+ Kf8 19.Qb4+ Kf7 20.Qd4 Qxd4 21.cxd4 f5 22.Bd3 Bf2 23.a4 Bxd4 24.a5 Ke7 25.b4 Kd6
 41/76	07:53	3 805 987 434	8 040 535	+0,29	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qh7 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh5 19.Qf6 Qd2+ 20.Kg1 Qc1+ 21.Qf1 Qxb2 22.Qe1 Kh6 23.Qxe5 Kh7 24.Qe7+ Kh6 25.Qf6 Kh7 26.h4 Qxa2 27.Qe7+ Kh6 28.Qe5 Kh7 29.Kf1 Qc4+ 30.Kf2 Qa2+ 31.Qe2 Qf7+ 32.Kg2 Qd5+ 33.Kh3 Qc5 34.Qf3
 41/63	07:53	3 805 987 434	8 040 535	+0,89	1.Bh5+ Ke7 2.Rad1 Rd8 3.Qf4 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Bxb7 Qc7 9.Bf3 Rb8 10.Qe2 f5 11.Re1 e5 12.Bd5+ Kg7 13.g4 fxg4 14.Qxe5+ Qxe5 15.Rxe5 Bf6 16.Re2 Rb5 17.Be4 Rh5 18.Kg1 h6 19.a4 Rc5 20.Bc2 h5 21.h3 gxh3 22.Kh2 Rg5 23.Kxh3 Kh6 24.Bd3 Kg7 25.Be4 Kh6
---------------------------------------------------------------------------
 42/51	10:00	4 877 568 152	8 126 449	 0,00	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bxh5+ Kg8 5.Rxf6 Be7 6.Qg6 Bxf6 7.Qf7+ Kh7 8.Re3 Qe8 9.Rh3 Kh6 10.Be2+ Kg5 11.Rg3+ Kh6
 42/75	10:00	4 877 568 152	8 126 449	+0,29	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh5 19.Qf6 Qd2+ 20.Kg1 Qc1+ 21.Qf1 Qxb2 22.Qe1 Kh6 23.Qxe5 Kh7 24.Qe7+ Kh6 25.Qh4+ Kg7 26.Qd4+ Kh7 27.Qd7+ Kh6 28.Qd3 Qxa2 29.h4 Qe6 30.Kf2 Kg7 31.Qd4+ Kh7 32.Kf3 Qf7+ 33.Kg2 Qa2+ 34.Qf2 Qd5+ 35.Qf3 Qd7 36.Qe3 Qd5+ 37.Kf2 Qf5+ 38.Qf3
 42/68	10:00	4 877 568 152	8 126 449	+0,71	1.Bh5+ Ke7 2.Qe3 g6 3.Bf3 Qc7 4.Rae1 Ra6 5.Bd5 e5 6.Rd1 Rd6 7.Bb3 Bg7 8.Rxd6 Qxd6 9.Qe4 f5 10.Qxb7+ Qd7 11.Qb6 Rc8 12.Rd1 Qc6 13.Qa5 Kf6 14.Rd8 Kg5 15.Rxc8 Qxc8 16.Qxb5 e4 17.a4 Qc7 18.a5 Qf4 19.Bd1 Qe5 20.Qxe5 Bxe5 21.g3 Kf6 22.Kg2 g5 23.a6 Bb8 24.b4 f4 25.c4 Ke5 26.Kf2 Kd4 27.gxf4 gxf4 28.c5 Kc4
---------------------------------------------------------------------------
 43/37	11:59	5 880 504 874	8 174 816	 0,00	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bxh5+ Kg8 5.Rxf6 Be7 6.Qg6 Bxf6 7.Qf7+ Kh7 8.Re3 Qe8 9.Rh3 Kh6 10.Bd1+ Kg5 11.Rg3+ Kh6
 43/77	11:59	5 880 504 874	8 174 816	+0,28	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh5 19.Qf6 Qd2+ 20.Kg1 Qc1+ 21.Qf1 Qxb2 22.Qe1 Kh6 23.Qxe5 Kh7 24.Qe7+ Kh6 25.Qh4+ Kg7 26.Qd4+ Kh7 27.Qd7+ Kh6 28.Qd3 Kh7 29.h4 Qa1+ 30.Kg2 Qxa2+ 31.Kf3 Qf7+ 32.Ke3 Qe6+ 33.Kf2 Qf7+ 34.Qf3 Qa2+ 35.Qe2 Qf7+ 36.Kg2 Qd5+ 37.Kh3 Kg7
 43/70	11:59	5 880 504 874	8 174 816	+0,88	1.Bh5+ Ke7 2.Qf4 Rd8 3.Rad1 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Bxb7 Qc7 9.g3 Rd8 10.Rxd8 Bxd8 11.Kg2 f5 12.a4 g5 13.Kf2 Ke7 14.Bc6 Kd6 15.Be8 Qb6+ 16.Ke2 Qxb5+ 17.Bxb5 g4 18.b4 Bb6 19.a5 Bg1 20.Kf1 Be3 21.a6 Kc7 22.Ke2 Bg1 23.Bc4 Bxh2 24.Bxe6 Bxg3 25.Bxf5 h5
---------------------------------------------------------------------------
 44/81	15:59	7 823 939 413	8 155 569	+0,23	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh5 19.Qf6 Qd2+ 20.Kg1 Qc1+ 21.Qf1 Qxb2 22.Qe1 Kh6 23.Qxe5 Kh7 24.h4 Qxa2 25.Kf1 Qc4+ 26.Kg2 Qd3 27.g4 Qd2+ 28.Kf3 Qd1+ 29.Kf4 Qd2+ 30.Qe3 Qd6+ 31.Kf3 Qd1+ 32.Kg3 Qd6+ 33.Kg2 Qd7 34.Kh3 Qd6 35.Qe2
 44/72	15:59	7 823 939 413	8 155 569	+0,25	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Be5 6.Qe2 Qb6 7.Bxb5 Rd8 8.Rd1 Kf7 9.a4 Rxd1 10.Rxd1 Rd8 11.Qxh5+ Ke7 12.g3 Rxd1+ 13.Qxd1 f5 14.Qd7+ Kf6 15.Kg2 g5 16.h3 Bb8 17.a5 Qxa5 18.Qe8 Ba7 19.Qf8+ Ke5 20.Qg7+ Kd6 21.Qxb7 Qa1 22.Qa6+ Qxa6 23.Bxa6 Be3 24.Bc8 Bc1 25.b3 g4 26.hxg4 fxg4 27.Bb7 Bd2 28.c4 Bb4 29.Be4 Ke5
 44/69	15:59	7 823 939 413	8 155 569	+0,88	1.Bh5+ Ke7 2.Rad1 Rd8 3.Qf4 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Qxb7 Qxb7 9.Bxb7 Rb8 10.Rd7 e5 11.Bd5+ Ke8 12.Rb7 Rxb7 13.Bxb7 Bc5 14.a4 Be3 15.a5 Kd7 16.Be4 f5 17.Bd5 Kd6 18.Bg8 h6 19.Bh7 Kc5 20.Bxg6 Kb5 21.Bxf5 Kxa5 22.g4 Ka4 23.Kg2 Kb3 24.Kf3 Bc5 25.h4 Kxb2 26.c4 Kb3 27.Be6 Kb4 28.Bd5 e4+ 29.Kxe4 Kc3
---------------------------------------------------------------------------
 45/92	17:30	8 551 308 899	8 139 747	+0,14	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kg5 20.Qe7+ Kf5 21.Qxb7 Kf6 22.Qb6+ Ke7 23.Qc5+ Ke6 24.Kg2 e4 25.Qc8+ Ke5 26.Qg4 Qd2+ 27.Kf1 Qc1+ 28.Kf2 Qxb2+ 29.Qe2 Qxc3 30.Qxb5+ Kf6 31.Qb6+ Kf5 32.Qe3 Qb2+ 33.Qe2 Qd4+ 34.Kf1 Qa1+ 35.Kg2 Qc3 36.h4 Ke5 37.a4 Qa3 38.h5 gxh5 39.Qb5+ Kd4
 45/65	17:30	8 551 308 899	8 139 747	+0,42	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Be5 6.Qe2 Qb6 7.Bxb5 Rd8 8.Rd1 Kf7 9.a4 Rxd1 10.Rxd1 Rd8 11.Qxh5+ Ke7 12.g3 Rxd1+ 13.Qxd1 f5 14.Kg2 Qd6 15.Qxd6+ Bxd6 16.Kf3 e5 17.Ke3 Bc7 18.Bc4 g6 19.Bd5 b6 20.Bb3 Kf6 21.Bc4 Bd6 22.b4 g5 23.g4 e4 24.gxf5 Kxf5 25.a5 bxa5 26.bxa5 Bxh2 27.a6 Bb8 28.Kd4 Ba7+ 29.Kd5
 45/70	17:30	8 551 308 899	8 139 747	+0,78	1.Bh5+ Ke7 2.Rad1 Rd8 3.Qf4 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Qxb7 Qxb7 9.Bxb7 Rb8 10.Rd7 e5 11.Bd5+ Ke8 12.Rb7 Rxb7 13.Bxb7 Bc5 14.a4 Kd7 15.a5 Be3 16.Be4 f5 17.Bd5 Kd6 18.Bg8 h6 19.Bh7 f4 20.Bxg6 Kd5 21.Bd3 e4 22.Bc2 Kc4 23.h4 Kb5 24.Bxe4 Kxa5 25.Kh2 Bc1 26.b3 Bd2 27.c4 Be3 28.Bd5 h5 29.Bf7 Kb4 30.Bxh5 Kxb3 31.Bf3 Kb4

zullil
Posts: 6442
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Test Position: Rook Sac from WCRCC 2013

Post by zullil » Mon Dec 23, 2019 8:12 pm

Vinvin wrote:
Mon Dec 23, 2019 12:08 pm
I came across this thread by accident.
I reran the position and found that Rxf6 eval is 3rd on depth 45 (probably because a lot of piece exchange that give a drawish position)
There are a lot of up and down with 3 best moves.

FEN: r3kb1r/1p4pp/2q1pp2/1p2Q3/8/2P5/PP2B1PP/R4R1K w kq - 0 1

Stockfish_19121008_x64_modern:

Code: Select all

...

---------------------------------------------------------------------------
 45/92	17:30	8 551 308 899	8 139 747	+0,14	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kg5 20.Qe7+ Kf5 21.Qxb7 Kf6 22.Qb6+ Ke7 23.Qc5+ Ke6 24.Kg2 e4 25.Qc8+ Ke5 26.Qg4 Qd2+ 27.Kf1 Qc1+ 28.Kf2 Qxb2+ 29.Qe2 Qxc3 30.Qxb5+ Kf6 31.Qb6+ Kf5 32.Qe3 Qb2+ 33.Qe2 Qd4+ 34.Kf1 Qa1+ 35.Kg2 Qc3 36.h4 Ke5 37.a4 Qa3 38.h5 gxh5 39.Qb5+ Kd4
 45/65	17:30	8 551 308 899	8 139 747	+0,42	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Be5 6.Qe2 Qb6 7.Bxb5 Rd8 8.Rd1 Kf7 9.a4 Rxd1 10.Rxd1 Rd8 11.Qxh5+ Ke7 12.g3 Rxd1+ 13.Qxd1 f5 14.Kg2 Qd6 15.Qxd6+ Bxd6 16.Kf3 e5 17.Ke3 Bc7 18.Bc4 g6 19.Bd5 b6 20.Bb3 Kf6 21.Bc4 Bd6 22.b4 g5 23.g4 e4 24.gxf5 Kxf5 25.a5 bxa5 26.bxa5 Bxh2 27.a6 Bb8 28.Kd4 Ba7+ 29.Kd5
 45/70	17:30	8 551 308 899	8 139 747	+0,78	1.Bh5+ Ke7 2.Rad1 Rd8 3.Qf4 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Qxb7 Qxb7 9.Bxb7 Rb8 10.Rd7 e5 11.Bd5+ Ke8 12.Rb7 Rxb7 13.Bxb7 Bc5 14.a4 Kd7 15.a5 Be3 16.Be4 f5 17.Bd5 Kd6 18.Bg8 h6 19.Bh7 f4 20.Bxg6 Kd5 21.Bd3 e4 22.Bc2 Kc4 23.h4 Kb5 24.Bxe4 Kxa5 25.Kh2 Bc1 26.b3 Bd2 27.c4 Be3 28.Bd5 h5 29.Bf7 Kb4 30.Bxh5 Kxb3 31.Bf3 Kb4
Stockfish-dev:

+2.34 1. Rxf6 O-O-O 2. Rf7 Rd5 3. Qe3 Bc5 4. Qg3 Rd7 5. Qxg7 Rxf7 6. Qxf7 Rf8 7. Qxh7 Bd6 8. Qg7 Qc7 9. Qh6 Qf7 10. Rd1 Kb8 11. Bf3 Bc7 12. Qh4 Qg6 13. Re1 Rd8 14. a4 Qd3 15. axb5 Qxb5 16. Qf2 Bb6 17. Qc2 Rd3 18. Qc1 Rd6 19. Qf4 Bc7 20. Qe4 Qb3 21. Qh7 Rd8 22. Qh3 Qb5 23. Qxe6 Rh8 24. h3 Qxb2 25. Qg4 Qb6 26. Qe4 Qc6 27. Qxc6 bxc6 28. Bxc6 Rd8 29. Bf3 Kc8 30. Re3 Bf4 31. Re4 Bg3 32. c4 Rd3 33. Rg4 Be5 34. Kg1 Kd7 35. h4 Ke6 36. h5 Rd4 37. Rxd4 Bxd4+ 38. Kh1 Kf5 39. h6 Bh8 40. h7 Kf4 41. c5 (depth 63, 6:54:57)

Paloma
Posts: 984
Joined: Thu Dec 25, 2008 8:07 pm

Re: Test Position: Rook Sac from WCRCC 2013

Post by Paloma » Mon Dec 23, 2019 9:32 pm

Thanks Louis

Vinvin
Posts: 4784
Joined: Thu Mar 09, 2006 8:40 am
Full name: Vincent Lejeune

Re: Test Position: Rook Sac from WCRCC 2013

Post by Vinvin » Mon Dec 23, 2019 11:19 pm

zullil wrote:
Mon Dec 23, 2019 8:12 pm
Vinvin wrote:
Mon Dec 23, 2019 12:08 pm
I came across this thread by accident.
I reran the position and found that Rxf6 eval is 3rd on depth 45 (probably because a lot of piece exchange that give a drawish position)
There are a lot of up and down with 3 best moves.

FEN: r3kb1r/1p4pp/2q1pp2/1p2Q3/8/2P5/PP2B1PP/R4R1K w kq - 0 1

Stockfish_19121008_x64_modern:

Code: Select all

...

---------------------------------------------------------------------------
 45/92	17:30	8 551 308 899	8 139 747	+0,14	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kg5 20.Qe7+ Kf5 21.Qxb7 Kf6 22.Qb6+ Ke7 23.Qc5+ Ke6 24.Kg2 e4 25.Qc8+ Ke5 26.Qg4 Qd2+ 27.Kf1 Qc1+ 28.Kf2 Qxb2+ 29.Qe2 Qxc3 30.Qxb5+ Kf6 31.Qb6+ Kf5 32.Qe3 Qb2+ 33.Qe2 Qd4+ 34.Kf1 Qa1+ 35.Kg2 Qc3 36.h4 Ke5 37.a4 Qa3 38.h5 gxh5 39.Qb5+ Kd4
 45/65	17:30	8 551 308 899	8 139 747	+0,42	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Be5 6.Qe2 Qb6 7.Bxb5 Rd8 8.Rd1 Kf7 9.a4 Rxd1 10.Rxd1 Rd8 11.Qxh5+ Ke7 12.g3 Rxd1+ 13.Qxd1 f5 14.Kg2 Qd6 15.Qxd6+ Bxd6 16.Kf3 e5 17.Ke3 Bc7 18.Bc4 g6 19.Bd5 b6 20.Bb3 Kf6 21.Bc4 Bd6 22.b4 g5 23.g4 e4 24.gxf5 Kxf5 25.a5 bxa5 26.bxa5 Bxh2 27.a6 Bb8 28.Kd4 Ba7+ 29.Kd5
 45/70	17:30	8 551 308 899	8 139 747	+0,78	1.Bh5+ Ke7 2.Rad1 Rd8 3.Qf4 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Qxb7 Qxb7 9.Bxb7 Rb8 10.Rd7 e5 11.Bd5+ Ke8 12.Rb7 Rxb7 13.Bxb7 Bc5 14.a4 Kd7 15.a5 Be3 16.Be4 f5 17.Bd5 Kd6 18.Bg8 h6 19.Bh7 f4 20.Bxg6 Kd5 21.Bd3 e4 22.Bc2 Kc4 23.h4 Kb5 24.Bxe4 Kxa5 25.Kh2 Bc1 26.b3 Bd2 27.c4 Be3 28.Bd5 h5 29.Bf7 Kb4 30.Bxh5 Kxb3 31.Bf3 Kb4
Stockfish-dev:

+2.34 1. Rxf6 O-O-O 2. Rf7 Rd5 3. Qe3 Bc5 4. Qg3 Rd7 5. Qxg7 Rxf7 6. Qxf7 Rf8 7. Qxh7 Bd6 8. Qg7 Qc7 9. Qh6 Qf7 10. Rd1 Kb8 11. Bf3 Bc7 12. Qh4 Qg6 13. Re1 Rd8 14. a4 Qd3 15. axb5 Qxb5 16. Qf2 Bb6 17. Qc2 Rd3 18. Qc1 Rd6 19. Qf4 Bc7 20. Qe4 Qb3 21. Qh7 Rd8 22. Qh3 Qb5 23. Qxe6 Rh8 24. h3 Qxb2 25. Qg4 Qb6 26. Qe4 Qc6 27. Qxc6 bxc6 28. Bxc6 Rd8 29. Bf3 Kc8 30. Re3 Bf4 31. Re4 Bg3 32. c4 Rd3 33. Rg4 Be5 34. Kg1 Kd7 35. h4 Ke6 36. h5 Rd4 37. Rxd4 Bxd4+ 38. Kh1 Kf5 39. h6 Bh8 40. h7 Kf4 41. c5 (depth 63, 6:54:57)
It's strange that your engine selects 1...O-O-O?
I checked the position after 1.Rxf6 gxf6 and I got a drawish eval after the line : 1. Rxf6 gxf6 2. Qxf6 Rg8 3. Bh5+ Rg6 4. Bxg6+ hxg6 5. Rf1 Kd7 6. Qf7+ Kd6 7. Rd1+ Ke5 8. h4 Rc8 9. Re1+ Kd5 10. b4 b6 11. c4+ bxc4 12. Rd1+ Ke5 13. Qf2 Qe4 14. Re1 c3 15. Rxe4+ Kxe4 16. Qxb6 *

Analyse after 1. Rxf6 gxf6 2. Qxf6 Rg8 3. Bh5+ Rg6 4. Bxg6+ hxg6 5. Rf1 Kd7 6. Qf7+ Kd6 7. Rd1+ Ke5 8. h4 Rc8 9. Re1+ Kd5 10. b4 b6 :

[d]2r2b2/5Q2/1pq1p1p1/1p1k4/1P5P/2P5/P5P1/4R2K w - - 0 11

+0,46 11.c4+ bxc4 12.Rd1+ Ke5 13.Qf2 Qe4 14.Re1 c3 15.Qg3+ Kd5 16.Rxe4 Kxe4 17.Qxg6+ Ke5 18.Qg3+ Kf6 19.Qg5+ Kf7 20.Qh5+ Kf6 21.Qh8+ Ke7 22.Qh7+ Kf6 23.Qc2 Bxb4 24.g4 Rc4 25.h5 Rxg4 26.h6 Ba5 27.Qh2 c2 28.Qf2+ Ke7 29.Qxc2 Rh4+ 30.Kg2 Rxh6 31.Qc7+ Kf6 32.Qf4+ Kg6 33.Qd6 Kf7 34.Qd7+ Kf6 35.Qe8 Ke5 36.Qb8+ Kf5 37.Qf8+ Rf6 38.Qe7 e5 39.Kf3 Bc3 40.Qd7+ Kg5+ 41.Ke3 Bd4+ 42.Ke4 Rf4+ 43.Kd5 Rf2 44.Qg7+ Kf4 45.Qh6+ Kf3 46.a3 Ra2 47.Qe6 Kf4

zullil
Posts: 6442
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Test Position: Rook Sac from WCRCC 2013

Post by zullil » Tue Dec 24, 2019 11:35 am

zullil wrote:
Mon Dec 23, 2019 8:12 pm
Vinvin wrote:
Mon Dec 23, 2019 12:08 pm
I came across this thread by accident.
I reran the position and found that Rxf6 eval is 3rd on depth 45 (probably because a lot of piece exchange that give a drawish position)
There are a lot of up and down with 3 best moves.

FEN: r3kb1r/1p4pp/2q1pp2/1p2Q3/8/2P5/PP2B1PP/R4R1K w kq - 0 1

Stockfish_19121008_x64_modern:

Code: Select all

...

---------------------------------------------------------------------------
 45/92	17:30	8 551 308 899	8 139 747	+0,14	1.Rxf6 gxf6 2.Qxf6 Rg8 3.Bh5+ Rg6 4.Bxg6+ hxg6 5.Rf1 Kd7 6.Qf7+ Kd6 7.Rd1+ Ke5 8.h3 Rc8 9.Qg8 Qe4 10.Qh8+ Kf5 11.Rf1+ Kg5 12.Rxf8 Rxf8 13.Qxf8 Qe1+ 14.Kh2 Qe5+ 15.g3 Qe2+ 16.Kg1 e5 17.Qf2 Qd3 18.Kh2 Kh6 19.Qf8+ Kg5 20.Qe7+ Kf5 21.Qxb7 Kf6 22.Qb6+ Ke7 23.Qc5+ Ke6 24.Kg2 e4 25.Qc8+ Ke5 26.Qg4 Qd2+ 27.Kf1 Qc1+ 28.Kf2 Qxb2+ 29.Qe2 Qxc3 30.Qxb5+ Kf6 31.Qb6+ Kf5 32.Qe3 Qb2+ 33.Qe2 Qd4+ 34.Kf1 Qa1+ 35.Kg2 Qc3 36.h4 Ke5 37.a4 Qa3 38.h5 gxh5 39.Qb5+ Kd4
 45/65	17:30	8 551 308 899	8 139 747	+0,42	1.Qg3 Kf7 2.Rae1 Bd6 3.Qg5 h5 4.Bd3 Kg8 5.Qe3 Be5 6.Qe2 Qb6 7.Bxb5 Rd8 8.Rd1 Kf7 9.a4 Rxd1 10.Rxd1 Rd8 11.Qxh5+ Ke7 12.g3 Rxd1+ 13.Qxd1 f5 14.Kg2 Qd6 15.Qxd6+ Bxd6 16.Kf3 e5 17.Ke3 Bc7 18.Bc4 g6 19.Bd5 b6 20.Bb3 Kf6 21.Bc4 Bd6 22.b4 g5 23.g4 e4 24.gxf5 Kxf5 25.a5 bxa5 26.bxa5 Bxh2 27.a6 Bb8 28.Kd4 Ba7+ 29.Kd5
 45/70	17:30	8 551 308 899	8 139 747	+0,78	1.Bh5+ Ke7 2.Rad1 Rd8 3.Qf4 Rxd1 4.Rxd1 g6 5.Bf3 Qc8 6.Qb4+ Kf7 7.Qxb5 Be7 8.Qxb7 Qxb7 9.Bxb7 Rb8 10.Rd7 e5 11.Bd5+ Ke8 12.Rb7 Rxb7 13.Bxb7 Bc5 14.a4 Kd7 15.a5 Be3 16.Be4 f5 17.Bd5 Kd6 18.Bg8 h6 19.Bh7 f4 20.Bxg6 Kd5 21.Bd3 e4 22.Bc2 Kc4 23.h4 Kb5 24.Bxe4 Kxa5 25.Kh2 Bc1 26.b3 Bd2 27.c4 Be3 28.Bd5 h5 29.Bf7 Kb4 30.Bxh5 Kxb3 31.Bf3 Kb4
Stockfish-dev:

+2.34 1. Rxf6 O-O-O 2. Rf7 Rd5 3. Qe3 Bc5 4. Qg3 Rd7 5. Qxg7 Rxf7 6. Qxf7 Rf8 7. Qxh7 Bd6 8. Qg7 Qc7 9. Qh6 Qf7 10. Rd1 Kb8 11. Bf3 Bc7 12. Qh4 Qg6 13. Re1 Rd8 14. a4 Qd3 15. axb5 Qxb5 16. Qf2 Bb6 17. Qc2 Rd3 18. Qc1 Rd6 19. Qf4 Bc7 20. Qe4 Qb3 21. Qh7 Rd8 22. Qh3 Qb5 23. Qxe6 Rh8 24. h3 Qxb2 25. Qg4 Qb6 26. Qe4 Qc6 27. Qxc6 bxc6 28. Bxc6 Rd8 29. Bf3 Kc8 30. Re3 Bf4 31. Re4 Bg3 32. c4 Rd3 33. Rg4 Be5 34. Kg1 Kd7 35. h4 Ke6 36. h5 Rd4 37. Rxd4 Bxd4+ 38. Kh1 Kf5 39. h6 Bh8 40. h7 Kf4 41. c5 (depth 63, 6:54:57)
+2.92 1. Rxf6 O-O-O 2. Rf7 Rd5 3. Qe3 Bc5 4. Qg3 Rd7 5. Qxg7 Rxf7 6. Qxf7 Qd7 7. Qxd7+ Kxd7 8. Bxb5+ Ke7 9. Re1 h5 10. Bc4 Rh6 11. g3 h4 12. gxh4 Bf2 13. Re4 Rxh4 14. Rxe6+ Kd7 15. Re2 Rf4 16. Bd5 b6 17. Kg2 Bc5 18. Bf3 Ra4 19. a3 Rf4 20. h3 Bd6 21. Bg4+ Kc6 22. Re6 Kd5 23. Rg6 Ke5 24. Kg3 Bc7 25. Rc6 Rf7 26. Bf3 Rg7+ 27. Kf2 Bd8 28. a4 Rh7 29. Bg4 Kd5 30. Rc8 Bg5 31. Ke2 Ra7 32. Bf3+ Ke5 33. Re8+ Kf5 34. Re4 Rh7 35. Rb4 Re7+ 36. Kf1 Be3 37. Kg2 Re8 38. Bg4+ Ke5 39. Kf3 Kd5 40. h4 Bc5 41. Rb5 Kc6 42. b4 Be3 43. Kg3 Kc7 44. Rd5 Rd8 45. Rxd8 Kxd8 46. h5 Bd2 47. a5 (depth 70, 19:23:30)

zullil
Posts: 6442
Joined: Mon Jan 08, 2007 11:31 pm
Location: PA USA
Full name: Louis Zulli

Re: Test Position: Rook Sac from WCRCC 2013

Post by zullil » Tue Dec 24, 2019 11:40 am

Vinvin wrote:
Mon Dec 23, 2019 11:19 pm

It's strange that your engine selects 1...O-O-O?
I checked the position after 1.Rxf6 gxf6 and I got a drawish eval after the line : 1. Rxf6 gxf6 2. Qxf6 Rg8 3. Bh5+ Rg6 4. Bxg6+ hxg6 5. Rf1 Kd7 6. Qf7+ Kd6 7. Rd1+ Ke5 8. h4 Rc8 9. Re1+ Kd5 10. b4 b6 11. c4+ bxc4 12. Rd1+ Ke5 13. Qf2 Qe4 14. Re1 c3 15. Rxe4+ Kxe4 16. Qxb6 *

Analyse after 1. Rxf6 gxf6 2. Qxf6 Rg8 3. Bh5+ Rg6 4. Bxg6+ hxg6 5. Rf1 Kd7 6. Qf7+ Kd6 7. Rd1+ Ke5 8. h4 Rc8 9. Re1+ Kd5 10. b4 b6 :

[d]2r2b2/5Q2/1pq1p1p1/1p1k4/1P5P/2P5/P5P1/4R2K w - - 0 11

+0,46 11.c4+ bxc4 12.Rd1+ Ke5 13.Qf2 Qe4 14.Re1 c3 15.Qg3+ Kd5 16.Rxe4 Kxe4 17.Qxg6+ Ke5 18.Qg3+ Kf6 19.Qg5+ Kf7 20.Qh5+ Kf6 21.Qh8+ Ke7 22.Qh7+ Kf6 23.Qc2 Bxb4 24.g4 Rc4 25.h5 Rxg4 26.h6 Ba5 27.Qh2 c2 28.Qf2+ Ke7 29.Qxc2 Rh4+ 30.Kg2 Rxh6 31.Qc7+ Kf6 32.Qf4+ Kg6 33.Qd6 Kf7 34.Qd7+ Kf6 35.Qe8 Ke5 36.Qb8+ Kf5 37.Qf8+ Rf6 38.Qe7 e5 39.Kf3 Bc3 40.Qd7+ Kg5+ 41.Ke3 Bd4+ 42.Ke4 Rf4+ 43.Kd5 Rf2 44.Qg7+ Kf4 45.Qh6+ Kf3 46.a3 Ra2 47.Qe6 Kf4
In your line, 8. h4 is poor:

+4.53 8. Re1+ Kd5 9. Rd1+ Ke5 10. h3 Rc8 11. Re1+ Kd5 12. b4 b6 13. c4+ bxc4 14. Rd1+ Ke5 15. Qxg6 Qe4 16. Qg5+ Qf5 17. Qh4 Qf4 18. Re1+ Kf5 19. Qh7+ Kg5 20. Qg8+ Kh5 21. Qxe6 Bd6 22. Qd5+ Kh6 23. Re6+ Kg7 24. Rxd6 Qf1+ 25. Kh2 Qf4+ 26. g3 Qf2+ 27. Qg2 Rf8 28. Rd7+ Kg8 29. Rd2 Qe1 30. Qe2 Qxe2+ 31. Rxe2 b5 32. Kg2 Kh8 33. Rd2 Kh7 34. Rd5 Rc8 35. Kf3 c3 36. Rd1 Ra8 37. Rc1 Rxa2 38. Rxc3 Rb2 39. g4 Rxb4 40. h4 Rb1 41. Rc7+ Kg6 42. Rc6+ Kg7 43. h5 b4 44. Kf4 (depth 36, 0:00:24)

+4.50 8. h3 Rc8 9. Re1+ Kd5 10. b4 b6 11. c4+ bxc4 12. Rd1+ Ke5 13. Qxg6 Qe4 14. Qg5+ Qf5 15. Qh4 Qf4 16. Re1+ Kf5 17. Qh7+ Kg5 18. Qg8+ Kh5 19. Qxe6 Bd6 20. Qd5+ Kh6 21. Re6+ Kg7 22. Rxd6 Re8 23. Qd1 Re7 24. Rxb6 Qg3 25. Qd4+ Kh7 26. Rh6+ Kxh6 27. Qf6+ Qg6 28. Qh4+ Qh5 29. Qxe7 Qd1+ 30. Kh2 Qd4 31. Qc7 c3 32. b5 Qd2 33. b6 c2 34. b7 c1=Q 35. Qxc1 Qxc1 36. b8=Q Qc4 37. Qd6+ Kh7 38. Qd7+ Kh6 39. Qd2+ Kh7 40. Qf2 Qc7+ 41. g3 Qc3 42. a4 Qa5 (depth 36, 0:00:24)

+0.79 8. h4 Rc8 9. Re1+ Kd5 10. b4 b6 11. c4+ bxc4 12. Rd1+ Ke5 13. Qf2 Qe4 14. Re1 c3 15. Qg3+ Kd5 16. Rxe4 Kxe4 17. Qxg6+ Ke5 18. Qg3+ Kf6 19. Qg5+ Kf7 20. Qh5+ Kf6 21. Qh8+ Kf7 22. Qh7+ Kf6 23. Qc2 Bxb4 24. g4 Rc4 25. h5 Rxg4 26. h6 Rh4+ 27. Kg2 Rxh6 28. Qf2+ Ke7 29. Qg3 Rf6 30. Qc7+ Kf8 31. Qxb6 Be7 32. Qc7 Rf5 33. Qxc3 Bd8 34. Qa3+ Kf7 35. Qd6 Rd5 36. Qb8 Ke7 37. Kf3 Kd7 38. Qb7+ Kd6 39. a3 Rf5+ 40. Ke2 (depth 36, 0:00:24)

EDIT: Actually, these lines seem quite subtle/complicated/uncertain.

Robert Flesher
Posts: 1242
Joined: Tue Aug 18, 2009 1:06 am

Re: Test Position: Rook Sac from WCRCC 2013

Post by Robert Flesher » Tue Dec 24, 2019 1:36 pm

are we sure from this position white is winning? Yes white has an edge, and the winning chances.

[d]r4b2/1p3Q2/2q1p1p1/1p2k3/8/2P5/PP4PP/3R3K w - - 0 32

Robert Flesher
Posts: 1242
Joined: Tue Aug 18, 2009 1:06 am

Re: Test Position: Rook Sac from WCRCC 2013

Post by Robert Flesher » Tue Dec 24, 2019 1:49 pm

New game Line
r4b2/1p3Q2/2q1p1p1/1p2k3/8/2P5/PP4PP/3R3K w - - 0 1

Analysis by Fat Fritz (in lc0) rtx:

32.Re1+ Kd5 33.Rd1+ Ke5 34.h3 Rc8 35.Qg8 Qe4 36.Qh8+ Kf5 37.Rf1+ Kg5 38.Rxf8 Rxf8 39.Qxf8 e5 40.Qf2 Qd3 41.Qc5 Kf4 42.Qf2+ Kg5 43.Kg1 e4 44.Qd4 Qb1+ 45.Kh2 Qe1 46.g3 Qe2+ 47.Kg1 Kh6 48.Qf2 Qd3 49.Kg2 Kh7 50.g4 e3 51.Qf7+ Kh8 52.Qf6+ Kh7 53.Kf3 e2+ 54.Kf2 Qd2 55.Qe7+ Kg8 56.Qxe2
White is slightly better: +/= (54% +28% =53% -19%) Depth: 29/64 00:10:32 24712kN
(, 24.12.2019)

Robert Flesher
Posts: 1242
Joined: Tue Aug 18, 2009 1:06 am

Re: Test Position: Rook Sac from WCRCC 2013

Post by Robert Flesher » Tue Dec 24, 2019 2:02 pm

New game Line
r4b2/1p3Q2/2q1p1p1/1p2k3/8/2P5/PP4PP/3R3K w - - 0 1

Analysis by Black Diamond XR7:

32.Re1+ Kd5 33.Rd1+ Ke5 34.h3 Rc8 35.Qh7 Qe4 36.Qh8+ Kf5 37.Rf1+ Kg5 38.Rxf8 Rxf8 39.Qxf8 Qe1+ 40.Kh2 Qe5+ 41.g3 Qe2+ 42.Kg1 e5 43.Qf2 Qd3 44.Kh2 Kh5 45.Qf6 Qc2+ 46.Kg1 Qb1+ 47.Qf1 Qxb2 48.Qe1 Kh6 49.Qxe5 Kh7 50.h4 Qa1+ 51.Kf2 Qxa2+ 52.Ke3 Qb3 53.g4 Qc4 54.g5 Qxh4 55.Qc7+ Kg8 56.Qb8+ Kf7 57.Qxb7+ Ke6 58.Qa6+ Kd7 59.Qxg6
White is slightly better: +/= (0.31) Depth: 25/62 00:06:53 2838MN
(, 24.12.2019)

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