Tough test postion

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meschle
Posts: 200
Joined: Tue Apr 01, 2008 11:53 pm

Tough test postion

Post by meschle »

[D] 4rk2/1p3r2/3q1nQp/1R1P2p1/P2pp3/3B2PP/1P3P2/2R3K1 w - - 0 1

Rxb7 according to the test suite

Spark & winfinder give correct solution but falling score

Rybka 4 and Stockfish give Be2

Advise please on correct solution please - esp those with monster machines :wink:
Regards Mark

Quad Q6600 3.0 Ghz, Vista 64bit, 4gb Ram
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jdart
Posts: 4367
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Re: Tough test postion

Post by jdart »

I gave Rybka 3 a fairly long think, and it prefers Be2 (depth 16):

New game
4rk2/1p3r2/3q1nQp/1R1P2p1/P2pp3/3B2PP/1P3P2/2R3K1 w - - 0 1

Analysis by Rybka 3 32-bit:

1. +- (1.97): 1.Be2 Rd8 2.Qxh6+ Kg8 3.Qg6+ Kf8 4.a5 d3 5.Rb6 Qxd5 6.Rxf6 dxe2 7.Re1 Rdd7 8.Qh6+ Ke7 9.Rxf7+ Kxf7 10.Qh5+ Kg7 11.Qxe2 Qxa5 12.Qxe4 Qc5 13.Qe8 Rf7 14.Qe3 Qxe3 15.Rxe3 Kg6

2. +/- (1.31): 1.Rxb7 Rxb7 2.Rc6 Rg7 3.Qxh6 Rd8 4.Rxd6 Rxd6 5.Be2 d3 6.Bg4 Kf7 7.Be6+ Rxe6 8.dxe6+ Kxe6 9.Kf1 Kf7 10.a5 Rg6 11.Qh8 Rg8 12.Qxg8+ Kxg8 13.a6 Nd7 14.a7 Nb6 15.Ke1 Kf7 16.Kd2

3. +/- (1.24): 1.Bb1 h5 2.Kg2 d3 3.Qh6+ Kg8 4.Qxg5+ Kh7 5.Ba2 Rg8 6.Qf5+ Kh6 7.Rc8 Rxc8 8.Qxc8 Rc7 9.Qf5 Rg7 10.Bb3 h4
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Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Tough test postion

Post by Dann Corbit »

stockfish says:

Code: Select all

     29	35:46	8.212.507,277	3.825.664	+3.43	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2d1 e4e3 Qf5xd3 Rg7e7 Bd1f3 Rd8f8 Rc1f1 Nf6d7 Bf3h5 Nd7f6 Bh5e2 Nf6e4 Qd3xe3 Ne4xf2 Qe3xg5+ Re7g7 Qg5xg7+ Kg8xg7 Rf1xf2 b7b6 Kg1g2 Rf8e8 Be2f3 Re8e3 Rf2e2 Re3xe2+ Bf3xe2 Qd6e5 Be2f3 Qe5d4 Kg2h2 Qd4f2+ Bf3g2 Qf2d4 h3h4 Qd4xa4 Rb5xb6 Qa4d4 Rb6b8
IvanHoe says:

Code: Select all

     26+	33:44	 508.478.596	251.000	+2.22	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Qg6xg5 Nf6h7 Qg5h4 Qd6f6 Qh4xf6 Nh7xf6 Rc1e1 d4d3 Be2d1 Rf7e7 Bd1b3 Nf6e8
More coming later.
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Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Tough test postion

Post by Dann Corbit »

Dann Corbit wrote:stockfish says:

Code: Select all

     29	35:46	8.212.507,277	3.825.664	+3.43	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2d1 e4e3 Qf5xd3 Rg7e7 Bd1f3 Rd8f8 Rc1f1 Nf6d7 Bf3h5 Nd7f6 Bh5e2 Nf6e4 Qd3xe3 Ne4xf2 Qe3xg5+ Re7g7 Qg5xg7+ Kg8xg7 Rf1xf2 b7b6 Kg1g2 Rf8e8 Be2f3 Re8e3 Rf2e2 Re3xe2+ Bf3xe2 Qd6e5 Be2f3 Qe5d4 Kg2h2 Qd4f2+ Bf3g2 Qf2d4 h3h4 Qd4xa4 Rb5xb6 Qa4d4 Rb6b8
IvanHoe says:

Code: Select all

     26+	33:44	 508.478.596	251.000	+2.22	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Qg6xg5 Nf6h7 Qg5h4 Qd6f6 Qh4xf6 Nh7xf6 Rc1e1 d4d3 Be2d1 Rf7e7 Bd1b3 Nf6e8
More coming later.
Fire 1.3 says:

Code: Select all

     24+	30:45	9.890.710,470	5.362.000	+2.51	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Rb5xb7 Rf7xb7 Rc1c6 d4d3 Rc6xd6 Rd8xd6 Be2d1 Rb7xb2 Qg6h6+ Kf8f7 Bd1h5+ Nf6xh5 Qh6xh5+ Rd6g6 Qh5h7+ Rg6g7 Qh7f5+ Kf7g8 Qf5e6+ Rg7f7 Qe6e8+ Rf7f8 Qe8g6+ Kg8h8 Qg6h6+ Kh8g8 Qh6xg5+ Kg8f7 Qg5f5+ Kf7g8 Qf5xe4 d3d2 Qe4g6+
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Terry McCracken
Posts: 16465
Joined: Wed Aug 01, 2007 4:16 am
Location: Canada

Re: Tough test postion

Post by Terry McCracken »

meschle wrote:[D] 4rk2/1p3r2/3q1nQp/1R1P2p1/P2pp3/3B2PP/1P3P2/2R3K1 w - - 0 1

Rxb7 according to the test suite

Spark & winfinder give correct solution but falling score

Rybka 4 and Stockfish give Be2

Advise please on correct solution please - esp those with monster machines :wink:
The move is good. The problem is the're other moves just as good but less aesthetic.
Terry McCracken
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Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Tough test postion

Post by Dann Corbit »

Dann Corbit wrote:
Dann Corbit wrote:stockfish says:

Code: Select all

     29	35:46	8.212.507,277	3.825.664	+3.43	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2d1 e4e3 Qf5xd3 Rg7e7 Bd1f3 Rd8f8 Rc1f1 Nf6d7 Bf3h5 Nd7f6 Bh5e2 Nf6e4 Qd3xe3 Ne4xf2 Qe3xg5+ Re7g7 Qg5xg7+ Kg8xg7 Rf1xf2 b7b6 Kg1g2 Rf8e8 Be2f3 Re8e3 Rf2e2 Re3xe2+ Bf3xe2 Qd6e5 Be2f3 Qe5d4 Kg2h2 Qd4f2+ Bf3g2 Qf2d4 h3h4 Qd4xa4 Rb5xb6 Qa4d4 Rb6b8
IvanHoe says:

Code: Select all

     26+	33:44	 508.478.596	251.000	+2.22	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Qg6xg5 Nf6h7 Qg5h4 Qd6f6 Qh4xf6 Nh7xf6 Rc1e1 d4d3 Be2d1 Rf7e7 Bd1b3 Nf6e8
More coming later.
Fire 1.3 says:

Code: Select all

     24+	30:45	9.890.710,470	5.362.000	+2.51	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Rb5xb7 Rf7xb7 Rc1c6 d4d3 Rc6xd6 Rd8xd6 Be2d1 Rb7xb2 Qg6h6+ Kf8f7 Bd1h5+ Nf6xh5 Qh6xh5+ Rd6g6 Qh5h7+ Rg6g7 Qh7f5+ Kf7g8 Qf5e6+ Rg7f7 Qe6e8+ Rf7f8 Qe8g6+ Kg8h8 Qg6h6+ Kh8g8 Qh6xg5+ Kg8f7 Qg5f5+ Kf7g8 Qf5xe4 d3d2 Qe4g6+
Bright says:

Code: Select all

    20/70	25:40	2.575.320,850	1.671.854	+2.06	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2g4 Qd6f8 Bg4d1 Rd8e8 Bd1b3 Qf8d6 Kg1f1 Re8f8 Rc1c8 Rf8xc8 Qf5xc8+ Kg8h7 Rb5xb7 Rg7xb7 Qc8xb7+ Kh7g6 a4a5 Kg6f5 Qb7c6 Kf5e5 Qc6c3+ Ke5f5
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Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Tough test postion

Post by Dann Corbit »

Dann Corbit wrote:
Dann Corbit wrote:
Dann Corbit wrote:stockfish says:

Code: Select all

     29	35:46	8.212.507,277	3.825.664	+3.43	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2d1 e4e3 Qf5xd3 Rg7e7 Bd1f3 Rd8f8 Rc1f1 Nf6d7 Bf3h5 Nd7f6 Bh5e2 Nf6e4 Qd3xe3 Ne4xf2 Qe3xg5+ Re7g7 Qg5xg7+ Kg8xg7 Rf1xf2 b7b6 Kg1g2 Rf8e8 Be2f3 Re8e3 Rf2e2 Re3xe2+ Bf3xe2 Qd6e5 Be2f3 Qe5d4 Kg2h2 Qd4f2+ Bf3g2 Qf2d4 h3h4 Qd4xa4 Rb5xb6 Qa4d4 Rb6b8
IvanHoe says:

Code: Select all

     26+	33:44	 508.478.596	251.000	+2.22	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Qg6xg5 Nf6h7 Qg5h4 Qd6f6 Qh4xf6 Nh7xf6 Rc1e1 d4d3 Be2d1 Rf7e7 Bd1b3 Nf6e8
More coming later.
Fire 1.3 says:

Code: Select all

     24+	30:45	9.890.710,470	5.362.000	+2.51	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Rb5xb7 Rf7xb7 Rc1c6 d4d3 Rc6xd6 Rd8xd6 Be2d1 Rb7xb2 Qg6h6+ Kf8f7 Bd1h5+ Nf6xh5 Qh6xh5+ Rd6g6 Qh5h7+ Rg6g7 Qh7f5+ Kf7g8 Qf5e6+ Rg7f7 Qe6e8+ Rf7f8 Qe8g6+ Kg8h8 Qg6h6+ Kh8g8 Qh6xg5+ Kg8f7 Qg5f5+ Kf7g8 Qf5xe4 d3d2 Qe4g6+
Bright says:

Code: Select all

    20/70	25:40	2.575.320,850	1.671.854	+2.06	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2g4 Qd6f8 Bg4d1 Rd8e8 Bd1b3 Qf8d6 Kg1f1 Re8f8 Rc1c8 Rf8xc8 Qf5xc8+ Kg8h7 Rb5xb7 Rg7xb7 Qc8xb7+ Kh7g6 a4a5 Kg6f5 Qb7c6 Kf5e5 Qc6c3+ Ke5f5
This problem appears to be part of the IQ test:
http://www.horizonchess.com/Jim/iq.html.txt
Neither of the stated solutions in the original problem are as good as Be2.

Rybka

Code: Select all

     21	16:33	 250.876.605	252.658	+2.41	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Qg6xg5 Nf6h7 Qg5h4 Qd6f6 Qh4xf6 Nh7xf6 Rb5b4 d4d3 Be2g4 Rf7e7 Bg4e6 Nf6xd5 Rb4xe4 Nd5f6 Re4e3 Rd8e8 Be6f5 Re7xe3 f2xe3 Re8xe3 Kg1f2 Re3e2+ Kf2f3 Re2xb2 Bf5xd3
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Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Tough test postion

Post by Dann Corbit »

Dann Corbit wrote:
Dann Corbit wrote:
Dann Corbit wrote:
Dann Corbit wrote:stockfish says:

Code: Select all

     29	35:46	8.212.507,277	3.825.664	+3.43	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2d1 e4e3 Qf5xd3 Rg7e7 Bd1f3 Rd8f8 Rc1f1 Nf6d7 Bf3h5 Nd7f6 Bh5e2 Nf6e4 Qd3xe3 Ne4xf2 Qe3xg5+ Re7g7 Qg5xg7+ Kg8xg7 Rf1xf2 b7b6 Kg1g2 Rf8e8 Be2f3 Re8e3 Rf2e2 Re3xe2+ Bf3xe2 Qd6e5 Be2f3 Qe5d4 Kg2h2 Qd4f2+ Bf3g2 Qf2d4 h3h4 Qd4xa4 Rb5xb6 Qa4d4 Rb6b8
IvanHoe says:

Code: Select all

     26+	33:44	 508.478.596	251.000	+2.22	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Qg6xg5 Nf6h7 Qg5h4 Qd6f6 Qh4xf6 Nh7xf6 Rc1e1 d4d3 Be2d1 Rf7e7 Bd1b3 Nf6e8
More coming later.
Fire 1.3 says:

Code: Select all

     24+	30:45	9.890.710,470	5.362.000	+2.51	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Rb5xb7 Rf7xb7 Rc1c6 d4d3 Rc6xd6 Rd8xd6 Be2d1 Rb7xb2 Qg6h6+ Kf8f7 Bd1h5+ Nf6xh5 Qh6xh5+ Rd6g6 Qh5h7+ Rg6g7 Qh7f5+ Kf7g8 Qf5e6+ Rg7f7 Qe6e8+ Rf7f8 Qe8g6+ Kg8h8 Qg6h6+ Kh8g8 Qh6xg5+ Kg8f7 Qg5f5+ Kf7g8 Qf5xe4 d3d2 Qe4g6+
Bright says:

Code: Select all

    20/70	25:40	2.575.320,850	1.671.854	+2.06	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2g4 Qd6f8 Bg4d1 Rd8e8 Bd1b3 Qf8d6 Kg1f1 Re8f8 Rc1c8 Rf8xc8 Qf5xc8+ Kg8h7 Rb5xb7 Rg7xb7 Qc8xb7+ Kh7g6 a4a5 Kg6f5 Qb7c6 Kf5e5 Qc6c3+ Ke5f5
This problem appears to be part of the IQ test:
http://www.horizonchess.com/Jim/iq.html.txt
Neither of the stated solutions in the original problem are as good as Be2.

Rybka

Code: Select all

     21	16:33	 250.876.605	252.658	+2.41	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Qg6xg5 Nf6h7 Qg5h4 Qd6f6 Qh4xf6 Nh7xf6 Rb5b4 d4d3 Be2g4 Rf7e7 Bg4e6 Nf6xd5 Rb4xe4 Nd5f6 Re4e3 Rd8e8 Be6f5 Re7xe3 f2xe3 Re8xe3 Kg1f2 Re3e2+ Kf2f3 Re2xb2 Bf5xd3
Junior sees the train wreck coming, but not how to get out of the way:

Code: Select all

     18	00:48	 451.472.566	0	+2.55	Rb5xb7 Rf7xb7 Rc1c6 Rb7b6 Rc6xd6 Rb6xd6 Bd3b5 Re8e5 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 h3h4 e4e3 f2xe3 d4xe3 Qg6h6+ Kf8g8 h4xg5
     19	01:10	 641.964.893	0	+2.44	Rb5xb7 Rf7xb7 Rc1c6 Rb7b6 Rc6xd6 Rb6xd6 Bd3b5 Re8e5 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 h3h4 g5xh4 Qg6h6+ Kf8e7 Qh6g7+ Ke7d8 Qg7h8+
     20	02:32	1.350.033.630	0	+2.12	Rb5xb7 Rf7xb7 Rc1c6 Rb7g7 Qg6xh6 Re8d8 Rc6xd6 Rd8xd6 Bd3e2 d4d3 Be2g4 d3d2 Bg4d1 Kf8f7
     21	05:22	2.778.305,535	0	+2.01	Rb5xb7 Rf7xb7 Rc1c6 Rb7g7 Qg6xh6 Re8d8 Rc6xd6 Rd8xd6 Bd3e2 d4d3 Be2g4 d3d2 Kg1f1 e4e3 Bg4d1 Nf6e4 Qh6h8+ Rg7g8 Qh8e5
     22	14:31	7.765.717,777	0	+1.64	Rb5xb7 Rf7xb7 Rc1c6 Rb7g7 Qg6xh6 Re8d8 Rc6xd6 Rd8xd6 Bd3e2 d4d3 Be2g4 d3d2 Kg1f1 e4e3 Bg4d1 Nf6e4 Qh6h8+ Kf8f7 Qh8h5+
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Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Tough test postion

Post by Dann Corbit »

Dann Corbit wrote:
Dann Corbit wrote:
Dann Corbit wrote:
Dann Corbit wrote:
Dann Corbit wrote:stockfish says:

Code: Select all

     29	35:46	8.212.507,277	3.825.664	+3.43	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2d1 e4e3 Qf5xd3 Rg7e7 Bd1f3 Rd8f8 Rc1f1 Nf6d7 Bf3h5 Nd7f6 Bh5e2 Nf6e4 Qd3xe3 Ne4xf2 Qe3xg5+ Re7g7 Qg5xg7+ Kg8xg7 Rf1xf2 b7b6 Kg1g2 Rf8e8 Be2f3 Re8e3 Rf2e2 Re3xe2+ Bf3xe2 Qd6e5 Be2f3 Qe5d4 Kg2h2 Qd4f2+ Bf3g2 Qf2d4 h3h4 Qd4xa4 Rb5xb6 Qa4d4 Rb6b8
IvanHoe says:

Code: Select all

     26+	33:44	 508.478.596	251.000	+2.22	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Qg6xg5 Nf6h7 Qg5h4 Qd6f6 Qh4xf6 Nh7xf6 Rc1e1 d4d3 Be2d1 Rf7e7 Bd1b3 Nf6e8
More coming later.
Fire 1.3 says:

Code: Select all

     24+	30:45	9.890.710,470	5.362.000	+2.51	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Rb5xb7 Rf7xb7 Rc1c6 d4d3 Rc6xd6 Rd8xd6 Be2d1 Rb7xb2 Qg6h6+ Kf8f7 Bd1h5+ Nf6xh5 Qh6xh5+ Rd6g6 Qh5h7+ Rg6g7 Qh7f5+ Kf7g8 Qf5e6+ Rg7f7 Qe6e8+ Rf7f8 Qe8g6+ Kg8h8 Qg6h6+ Kh8g8 Qh6xg5+ Kg8f7 Qg5f5+ Kf7g8 Qf5xe4 d3d2 Qe4g6+
Bright says:

Code: Select all

    20/70	25:40	2.575.320,850	1.671.854	+2.06	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2g4 Qd6f8 Bg4d1 Rd8e8 Bd1b3 Qf8d6 Kg1f1 Re8f8 Rc1c8 Rf8xc8 Qf5xc8+ Kg8h7 Rb5xb7 Rg7xb7 Qc8xb7+ Kh7g6 a4a5 Kg6f5 Qb7c6 Kf5e5 Qc6c3+ Ke5f5
This problem appears to be part of the IQ test:
http://www.horizonchess.com/Jim/iq.html.txt
Neither of the stated solutions in the original problem are as good as Be2.

Rybka

Code: Select all

     21	16:33	 250.876.605	252.658	+2.41	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Qg6xg5 Nf6h7 Qg5h4 Qd6f6 Qh4xf6 Nh7xf6 Rb5b4 d4d3 Be2g4 Rf7e7 Bg4e6 Nf6xd5 Rb4xe4 Nd5f6 Re4e3 Rd8e8 Be6f5 Re7xe3 f2xe3 Re8xe3 Kg1f2 Re3e2+ Kf2f3 Re2xb2 Bf5xd3
Junior sees the train wreck coming, but not how to get out of the way:

Code: Select all

     18	00:48	 451.472.566	0	+2.55	Rb5xb7 Rf7xb7 Rc1c6 Rb7b6 Rc6xd6 Rb6xd6 Bd3b5 Re8e5 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 h3h4 e4e3 f2xe3 d4xe3 Qg6h6+ Kf8g8 h4xg5
     19	01:10	 641.964.893	0	+2.44	Rb5xb7 Rf7xb7 Rc1c6 Rb7b6 Rc6xd6 Rb6xd6 Bd3b5 Re8e5 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 h3h4 g5xh4 Qg6h6+ Kf8e7 Qh6g7+ Ke7d8 Qg7h8+
     20	02:32	1.350.033.630	0	+2.12	Rb5xb7 Rf7xb7 Rc1c6 Rb7g7 Qg6xh6 Re8d8 Rc6xd6 Rd8xd6 Bd3e2 d4d3 Be2g4 d3d2 Bg4d1 Kf8f7
     21	05:22	2.778.305,535	0	+2.01	Rb5xb7 Rf7xb7 Rc1c6 Rb7g7 Qg6xh6 Re8d8 Rc6xd6 Rd8xd6 Bd3e2 d4d3 Be2g4 d3d2 Kg1f1 e4e3 Bg4d1 Nf6e4 Qh6h8+ Rg7g8 Qh8e5
     22	14:31	7.765.717,777	0	+1.64	Rb5xb7 Rf7xb7 Rc1c6 Rb7g7 Qg6xh6 Re8d8 Rc6xd6 Rd8xd6 Bd3e2 d4d3 Be2g4 d3d2 Kg1f1 e4e3 Bg4d1 Nf6e4 Qh6h8+ Kf8f7 Qh8h5+

Shredder finds it:

Code: Select all

    22/57	27:41	5.605.113,163	3.373.807	+2.06	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Kg1g2 Nf6xd5 Qh6xd6 Rd8xd6 Be2c4 Rf7d7 Rc1e1 d4d3 Re1xe4 Kg8h8 Re4e1 d3d2 Re1d1 Nd5b6 Bc4b3 Rd6c6 a4a5 Nb6c4 a5a6 b7xa6 Rb5b8+ Kh8h7 Bb3c2+ Rc6g6
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Dann Corbit
Posts: 12541
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Tough test postion

Post by Dann Corbit »

Dann Corbit wrote:
Dann Corbit wrote:
Dann Corbit wrote:
Dann Corbit wrote:
Dann Corbit wrote:
Dann Corbit wrote:stockfish says:

Code: Select all

     29	35:46	8.212.507,277	3.825.664	+3.43	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2d1 e4e3 Qf5xd3 Rg7e7 Bd1f3 Rd8f8 Rc1f1 Nf6d7 Bf3h5 Nd7f6 Bh5e2 Nf6e4 Qd3xe3 Ne4xf2 Qe3xg5+ Re7g7 Qg5xg7+ Kg8xg7 Rf1xf2 b7b6 Kg1g2 Rf8e8 Be2f3 Re8e3 Rf2e2 Re3xe2+ Bf3xe2 Qd6e5 Be2f3 Qe5d4 Kg2h2 Qd4f2+ Bf3g2 Qf2d4 h3h4 Qd4xa4 Rb5xb6 Qa4d4 Rb6b8
IvanHoe says:

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     26+	33:44	 508.478.596	251.000	+2.22	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Qg6xg5 Nf6h7 Qg5h4 Qd6f6 Qh4xf6 Nh7xf6 Rc1e1 d4d3 Be2d1 Rf7e7 Bd1b3 Nf6e8
More coming later.
Fire 1.3 says:

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     24+	30:45	9.890.710,470	5.362.000	+2.51	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Rb5xb7 Rf7xb7 Rc1c6 d4d3 Rc6xd6 Rd8xd6 Be2d1 Rb7xb2 Qg6h6+ Kf8f7 Bd1h5+ Nf6xh5 Qh6xh5+ Rd6g6 Qh5h7+ Rg6g7 Qh7f5+ Kf7g8 Qf5e6+ Rg7f7 Qe6e8+ Rf7f8 Qe8g6+ Kg8h8 Qg6h6+ Kh8g8 Qh6xg5+ Kg8f7 Qg5f5+ Kf7g8 Qf5xe4 d3d2 Qe4g6+
Bright says:

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    20/70	25:40	2.575.320,850	1.671.854	+2.06	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2g4 Qd6f8 Bg4d1 Rd8e8 Bd1b3 Qf8d6 Kg1f1 Re8f8 Rc1c8 Rf8xc8 Qf5xc8+ Kg8h7 Rb5xb7 Rg7xb7 Qc8xb7+ Kh7g6 a4a5 Kg6f5 Qb7c6 Kf5e5 Qc6c3+ Ke5f5
This problem appears to be part of the IQ test:
http://www.horizonchess.com/Jim/iq.html.txt
Neither of the stated solutions in the original problem are as good as Be2.

Rybka

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     21	16:33	 250.876.605	252.658	+2.41	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 Qg6xg5 Nf6h7 Qg5h4 Qd6f6 Qh4xf6 Nh7xf6 Rb5b4 d4d3 Be2g4 Rf7e7 Bg4e6 Nf6xd5 Rb4xe4 Nd5f6 Re4e3 Rd8e8 Be6f5 Re7xe3 f2xe3 Re8xe3 Kg1f2 Re3e2+ Kf2f3 Re2xb2 Bf5xd3
Junior sees the train wreck coming, but not how to get out of the way:

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     18	00:48	 451.472.566	0	+2.55	Rb5xb7 Rf7xb7 Rc1c6 Rb7b6 Rc6xd6 Rb6xd6 Bd3b5 Re8e5 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 h3h4 e4e3 f2xe3 d4xe3 Qg6h6+ Kf8g8 h4xg5
     19	01:10	 641.964.893	0	+2.44	Rb5xb7 Rf7xb7 Rc1c6 Rb7b6 Rc6xd6 Rb6xd6 Bd3b5 Re8e5 Qg6xh6+ Kf8g8 Qh6g6+ Kg8f8 h3h4 g5xh4 Qg6h6+ Kf8e7 Qh6g7+ Ke7d8 Qg7h8+
     20	02:32	1.350.033.630	0	+2.12	Rb5xb7 Rf7xb7 Rc1c6 Rb7g7 Qg6xh6 Re8d8 Rc6xd6 Rd8xd6 Bd3e2 d4d3 Be2g4 d3d2 Bg4d1 Kf8f7
     21	05:22	2.778.305,535	0	+2.01	Rb5xb7 Rf7xb7 Rc1c6 Rb7g7 Qg6xh6 Re8d8 Rc6xd6 Rd8xd6 Bd3e2 d4d3 Be2g4 d3d2 Kg1f1 e4e3 Bg4d1 Nf6e4 Qh6h8+ Rg7g8 Qh8e5
     22	14:31	7.765.717,777	0	+1.64	Rb5xb7 Rf7xb7 Rc1c6 Rb7g7 Qg6xh6 Re8d8 Rc6xd6 Rd8xd6 Bd3e2 d4d3 Be2g4 d3d2 Kg1f1 e4e3 Bg4d1 Nf6e4 Qh6h8+ Kf8f7 Qh8h5+

Shredder finds it:

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    22/57	27:41	5.605.113,163	3.373.807	+2.06	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Kg1g2 Nf6xd5 Qh6xd6 Rd8xd6 Be2c4 Rf7d7 Rc1e1 d4d3 Re1xe4 Kg8h8 Re4e1 d3d2 Re1d1 Nd5b6 Bc4b3 Rd6c6 a4a5 Nb6c4 a5a6 b7xa6 Rb5b8+ Kh8h7 Bb3c2+ Rc6g6
Sjeng sees it immediately at ply 3 and never lets go:

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    19/61	38:18	7.746.749,109	3.371.977	+2.04	Bd3e2 Re8d8 Qg6xh6+ Kf8g8 Qh6g6+ Rf7g7 Qg6f5 d4d3 Be2d1 Rg7e7 Qf5xg5+ Re7g7 Qg5e3 Rd8f8 Kg1g2 Rg7f7 f2f4 Rf7g7 a4a5 Qd6d7 Rb5c5 Qd7d6 Rc5c8 Qd6xd5 Rc8xf8+ Kg8xf8 Rc1c8+
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