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The best move
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Mc Mad

Joined: 08 Mar 2006
Posts: 6965
Location: UK

Posted: Mon Jun 25, 2012 8:22 am Post subject: The best move

[d] r1r1q1k1/5p1p/b3pBp1/n3P1Q1/p1ppR2P/P2P2PB/2P2P2/R5K1 w - - 0 27

Here black has just blundered with 26...c4? so now white has to decide between 27. Rxd4 or h5 both of which are winning. However which one is stronger and which one does your engine prefer to play? Confused

_________________
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Jesús Muñoz

Joined: 13 Jul 2011
Posts: 690
Location: Madrid, Spain.

Posted: Mon Jun 25, 2012 9:37 am Post subject: Re: Which is the best move?

Hello!

I tried Critter 1.6 w32 with Multi PV = 2. Analysis by Critter 1.6 w32 in an Intel Pentium D930 (using two cores) with 512 MB of hash and 32 MB of cache for the full set of Gaviota TBs, running under Arena 2.0.1 GUI:

[d]r1r1q1k1/5p1p/b3pBp1/n3P1Q1/p1ppR2P/P2P2PB/2P2P2/R5K1 w - - 0 27

Quote:

FEN: r1r1q1k1/5p1p/b3pBp1/n3P1Q1/p1ppR2P/P2P2PB/2P2P2/R5K1 w - - 0 27

Critter_1.6_32bit:

2/4 00:01 765 19.125 +1,52 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 Re4xd4 c4xd3 c2xd3
2/4 00:01 765 19.125 +1,52 Re4xd4 c4xd3 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 c2xd3
---------------------------------------------------------------------------
3/5 00:01 1.859 40.413 +1,37 Re4xd4 Na5c6 Rd4d6 c4xd3 c2xd3
3/5 00:01 1.859 40.413 +1,52 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 Re4xd4 c4xd3 c2xd3
---------------------------------------------------------------------------
4/7 00:01 3.059 59.980 +1,50 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 Re4xd4 c4xd3 c2xd3 Kf8g8
4/7 00:01 3.059 59.980 +1,50 Re4xd4 c4xd3 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 c2xd3 Kf8g8
---------------------------------------------------------------------------
5/9 00:01 4.684 74.349 +0,83 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 Re4xd4 c4xd3 c2xd3 Na5b3
5/9 00:01 4.684 74.349 +0,83 Re4xd4 c4xd3 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 c2xd3 Na5b3
---------------------------------------------------------------------------
6/12 00:01 11.867 144.719 +0,42 d3xc4 Rc8xc4 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 Ra1b1 Na5c6 Re4e2
6/12 00:01 11.867 144.719 +0,56 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 Re4xd4 c4xd3 Bh3g2 d3xc2 Bg2xa8 Rc8xa8 Ra1c1
---------------------------------------------------------------------------
7/13 00:01 42.689 227.069 +0,36 d3xc4 Rc8xc4 Qg5d2 Na5c6 Bh3f1 Rc4c5 Qd2h6 Qe8f8 Qh6xf8+ Kg8xf8
7/13 00:01 42.689 227.069 +0,42 h4h5 c4xd3 h5xg6 f7xg6 Qg5h6 Rc8c7 c2xd3 Na5b3 Ra1d1
---------------------------------------------------------------------------
8/18 00:01 132.485 354.237 +0,66 d3xc4 Rc8xc4 h4h5 Rc4xc2 h5xg6 f7xg6 Qg5h6 Rc2c7 Re4xd4 Na5b3 Rd4d6 Ba6c4
8/18 00:01 132.485 354.237 +0,86 Re4g4 Qe8f8 Rg4xd4 c4xd3 Rd4xa4 Na5c6 c2xd3 Ba6xd3 Ra4xa8 Rc8xa8 Ra1c1 Bd3e4
---------------------------------------------------------------------------
9/20 00:01 215.704 432.272 +0,65 Re4g4 Qe8f8 Bh3g2 Na5c6 Bg2xc6 Rc8xc6 Rg4xd4 c4xd3 c2xd3 Rc6c3 Bf6e7 Qf8g7
9/20 00:01 215.704 432.272 +0,95 d3xc4 Rc8xc4 h4h5 Rc4xc2 h5xg6 f7xg6 Qg5h6 Rc2c7 Re4xd4 Ba6b7 Ra1d1 Bb7d5 Bh3f1 Qe8f8 Qh6xf8+ Ra8xf8 Rd4xa4
---------------------------------------------------------------------------
10/34 00:02 590.338 576.501 +0,89 d3xc4 Na5c6 Bh3f1 Qe8f8 h4h5 Ra8b8 Qg5d2 Qf8c5 Qd2h6 Qc5f8 Qh6xf8+ Kg8xf8
10/34 00:02 590.338 576.501 +1,26 Re4g4 Qe8f8 h4h5 c4xd3 h5xg6 f7xg6 Rg4xd4 Rc8c6 Rd4d6 Rc6xd6 e5xd6 Qf8xd6 Qg5xa5 d3xc2 Qa5xa4 Ra8f8 Qa4d4 Qd6xd4 Bf6xd4
---------------------------------------------------------------------------
11/36 00:05 3.264.696 830.711 +1,17 Re4g4 Qe8f8 h4h5 c4xd3 h5xg6 f7xg6 Rg4xd4 Rc8e8 Rd4xa4 Na5b7 Qg5d2 Nb7c5 Ra4d4 d3xc2 Qd2xc2 Ra8b8 Ra1d1
11/36 00:05 3.264.696 830.711 +1,20 h4h5 c4xd3 Re4h4 Rc8c7 Qg5h6 Qe8f8 h5xg6 Qf8xh6 Rh4xh6 f7xg6 Bh3xe6+ Kg8f8 c2xd3 Ba6xd3 Be6d5 Na5c6 Bd5xc6 Rc7xc6 Rh6xh7 Ra8e8 Ra1d1
---------------------------------------------------------------------------
12/38 00:06 4.452.631 832.423 +1,35 h4h5 c4xd3 Re4h4 Rc8c7 Bh3xe6 f7xe6 h5xg6 Qe8xg6 Qg5xg6+ h7xg6 Rh4h8+ Kg8f7 Rh8h7+ Kf7e8 Rh7xc7 d3xc2 Rc7xc2 Na5b3 Ra1d1 Ke8d7 f2f4 Ra8b8 Kg1f2 d4d3
12/38 00:06 4.452.631 832.423 +1,57 Re4g4 Qe8f8 h4h5 c4xd3 h5xg6 f7xg6 Rg4xd4 Qf8f7 Rd4d6 Rc8e8 Qg5h6 d3xc2 Bh3xe6 Re8xe6 Rd6xe6 Qf7f8 Qh6xf8+ Kg8xf8 Ra1c1 Ba6d3 Re6e7
---------------------------------------------------------------------------
13/46 00:09 7.080.568 854.934 +1,00 d3xc4 Na5c6 h4h5 Ba6xc4 c2c3 Ra8b8 c3xd4 Qe8f8 Re4h4 Rb8b3 h5xg6 f7xg6 Ra1c1 Bc4d5 Bh3g2 Qf8f7 Bg2xd5 e6xd5 Rc1e1 Rc8f8 Qg5h6 Qf7a7 Re1c1 Nc6xd4
13/46 00:09 7.080.568 854.934 +1,32 h4h5 c4xd3 Re4h4 Rc8c7 Bh3xe6 f7xe6 h5xg6 Qe8xg6 Qg5xg6+ h7xg6 Rh4h8+ Kg8f7 Rh8h7+ Kf7e8 Rh7xc7 d3xc2 Rc7xc2 Na5b3 Ra1d1 Ke8d7 f2f4 Ra8b8 Kg1f2 d4d3 Kf2e3 Nb3d4 Rc2d2 Nd4f5+ Ke3f2 Rb8b3
---------------------------------------------------------------------------
14/46 00:16 14.398.982 923.603 +1,24 h4h5 c4xd3 Re4h4 Rc8c7 Bh3xe6 f7xe6 h5xg6 Qe8xg6 Qg5xg6+ h7xg6 Rh4h8+ Kg8f7 Rh8h7+ Kf7e8 Rh7xc7 d3xc2 Rc7xc2 Na5b3 Ra1d1 Ke8d7 f2f4 Ra8b8 Kg1f2 d4d3 Kf2e3 Nb3d4 Rc2d2 Nd4f5+ Ke3f2 Rb8b3 g3g4
14/46 00:16 14.398.982 923.603 +1,37 d3xc4 Na5c6 Bh3f1 Ra8b8 h4h5 Qe8f8 Re4h4 Ba6b7 Qg5g4 Rc8e8 Bf1e2 Qf8c5 Qg4e4 Nc6e7 Qe4xd4
---------------------------------------------------------------------------
15/56 00:38 35.268.854 948.265 +1,24 h4h5 c4xd3 Re4h4 Rc8c7 Bh3xe6 f7xe6 h5xg6 Qe8xg6 Qg5xg6+ h7xg6 Rh4h8+ Kg8f7 Rh8h7+ Kf7e8 Rh7xc7 d3xc2 Rc7xc2 Na5b3 Ra1d1 Ke8d7 f2f4 Ra8b8 Kg1f2 d4d3 Kf2e3 Nb3d4 Rc2d2 Nd4f5+ Ke3f2 Rb8b3 g3g4
15/56 00:38 35.268.854 948.265 +1,74 d3xc4 Na5c6 Bh3f1 Qe8f8 h4h5 Rc8c7 Re4h4 Rc7d7 h5xg6 f7xg6 Bf1d3 Nc6e7 Ra1b1 Ra8c8 Rb1b4 Ba6b7 Rb4xa4 Bb7c6 Ra4a6 Qf8f7 Bf6xe7 Rd7xe7 Rh4xd4 Bc6b7 Ra6b6 Rc8b8
---------------------------------------------------------------------------
16/56 00:51 48.462.078 960.767 +1,35 h4h5 c4xd3 c2xd3 Na5b3 Re4h4 Rc8c7 Qg5h6 Qe8f8 h5xg6 Qf8xh6 Rh4xh6 f7xg6 Bh3xe6+ Kg8f8 Be6d5 Ba6b7 Bd5xb7 Rc7xb7 Ra1b1 Ra8e8 f2f4 Rb7c7 Kg1g2 Rc7c2+ Kg2h3 Rc2c3 Rh6xh7 Rc3xd3 Kh3g4 Rd3c3
16/56 00:51 48.462.078 960.767 +1,74 d3xc4 Na5c6 Bh3f1 Qe8f8 h4h5 Rc8c7 Re4h4 Rc7d7 h5xg6 f7xg6 Bf1d3 Nc6e7 Ra1b1 Ra8c8 Rb1b4 Ba6b7 Rb4xa4 Bb7c6 Ra4a6 Qf8f7 Bf6xe7 Rd7xe7 Rh4xd4 Bc6b7 Ra6b6 Rc8b8
---------------------------------------------------------------------------
17/62 05:11 330.332.873 1.063.959 +1,74 d3xc4 Na5c6 Bh3f1 Qe8f8 h4h5 Rc8c7 Re4h4 Nc6e7 Bf1d3 Rc7d7 Ra1b1 Ra8c8 h5xg6 f7xg6 Rb1b4 Ba6b7 Rb4xa4 Bb7c6 Ra4a6 Qf8f7 Bf6xe7 Rd7xe7 Rh4xd4 Bc6b7 Ra6b6 Rc8b8
17/62 05:11 330.332.873 1.063.959 +2,26 Re4xd4 c4xd3 Rd4d7 Na5c6 c2xd3 Ra8a7 Rd7d6 Ra7c7 Ra1b1 Rc7b7 Rb1c1 Rb7c7 Bh3g2 Ba6b7 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 d3d4 Kf8e8 Rc1c5 Ke8f8 Bf6d8 Nc6xd8
---------------------------------------------------------------------------
18/62 07:58 505.214.870 1.058.229 +1,92 d3xc4 Na5c6 Bh3f1 Ra8a7 h4h5 Nc6e7 Re4xd4 Ne7f5 Rd4d2 Ra7d7 Rd2xd7 Qe8xd7 g3g4 Nf5g7 h5xg6 f7xg6 Qg5f4 Ng7e8 Ra1b1 Ne8xf6 e5xf6 e6e5 Qf4e4 Qd7f7 Qe4xe5 Ba6xc4 Bf1g2 Rc8e8 Qe5d6
18/62 07:58 505.214.870 1.058.229 +2,53 Re4xd4 Rc8c7 h4h5 c4xd3 c2xd3 Ba6b7 h5xg6 f7xg6 Ra1c1 Rc7d7 Rd4d6 Bb7d5 Rc1c5 Bd5a2 Rd6xd7 Qe8xd7 Qg5c1 Na5b3 Rc5c7 Nb3xc1 Rc7xd7 Nc1e2+ Kg1f1 Ne2c3 Rd7g7+ Kg8f8 Rg7xh7 Ba2d5 Bh3g2 Bd5xg2+ Kf1xg2
---------------------------------------------------------------------------
19/66 09:17 587.639.985 1.056.158 +1,82 d3xc4 Na5c6 Bh3f1 Ra8a7 h4h5 Nc6e7 Re4xd4 Ne7f5 h5xg6 f7xg6 Rd4d2 Ra7d7 Ra1d1 Rd7xd2 Rd1xd2 Ba6b7 Qg5g4 Qe8f7 Qg4h3 h7h5 c4c5 Bb7f3 Rd2d8+ Rc8xd8 Bf6xd8 Bf3g4 Qh3g2 Nf5d4
19/66 09:17 587.639.985 1.056.158 +2,71 Re4xd4 Rc8c7 h4h5 c4xd3 c2xd3 Na5b7 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 h5xg6 f7xg6 Rd4xa4 Kf8f7 Bh3f1 Rc7c8 Bf1g2 Nb7c5 Ra4h4 Ra8b8 Rh4xh7+ Kf7g8 Rh7a7 Ba6xd3 a3a4 Rb8b2 Ra1c1 Bd3f5 a4a5 Bf5d3 g3g4 Rb2d2
---------------------------------------------------------------------------
20/66 26:00 1.661.485.080 1.065.821 +3,18 Re4xd4 c4xd3 Rd4d7 Na5c6 c2xd3 Ba6b5 Bh3xe6 Nc6d8 Rd7e7 Qe8xe7 Bf6xe7 Nd8xe6 Qg5e3 Rc8c7 Be7b4 Rc7c2 Ra1d1 Ra8d8 Bb4d6 Rc2c3 h4h5 g6xh5 Qe3f3 Bb5a6 Qf3e4 Rd8c8 d3d4 Ne6g5 Qe4f5
20/66 26:00 1.661.485.080 1.065.821 +3,61 h4h5 Rc8c7 Re4xd4 c4xd3 c2xd3 Na5b7 Rd4xa4 Nb7c5 Ra1c1 Ba6b7 Ra4xa8 Bb7xa8 Qg5h6 Qe8f8 Qh6xf8+ Kg8xf8 h5xg6 h7xg6 Bf6d8 Rc7d7 Bd8a5 Nc5xd3 Rc1c8+ Kf8e7 Rc8xa8 Nd3xe5 Ba5b4+ Ke7f6 Bh3f1 Rd7b7 f2f4 Ne5g4 Bb4c3+ Kf6e7 a3a4 Rb7b3 Bc3e1 f7f6 a4a5 e6e5 f4xe5 Ng4xe5

I stopped the analysis after 27 minutes; Arena showed five tablebase hits. Critter prefers 27.- h5 at depth 20/66 in my analysis.

Regards from Spain.

Ajedrecista.
_________________
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Chess will never be solved.

Louis Zulli

Joined: 08 Jan 2007
Posts: 2145
Location: PA USA

Posted: Mon Jun 25, 2012 12:12 pm Post subject: Re: The best move

Jack Lad wrote:

[d] r1r1q1k1/5p1p/b3pBp1/n3P1Q1/p1ppR2P/P2P2PB/2P2P2/R5K1 w - - 0 27

Critter-1.4 prefers Rxd4 followed by h5:

Code:

17/43 00:03 14081764 3550621 +1.32 h5 cxd3 Rh4 Rc7 cxd3 Nb3 Qh6 Qf8 hxg6 Qxh6 Rxh6 fxg6 Bxe6+ Kf8 Rd1 Bb7 Bg5 Re8 Bc4 Na5 Bb5 Bc6 Bxc6 Nxc6 f4 Rb8 Kg2 Rb2+ Kf3
17/43+ 00:05 24903082 4784453 +1.51 Rxd4 cxd3 Qh6 Qf8
17/45+ 00:06 32581987 5389906 +1.70 Rxd4 cxd3 Qh6 Qf8
17/45+ 00:09 62724756 6713556 +1.99 Rxd4 cxd3 Qh6 Qf8
17/50+ 00:13 96842057 7447097 +2.41 Rxd4 cxd3 Qh6 Qf8
17/59 00:24 207089953 8346362 +2.65 Rxd4 Rc7 h5 cxd3 cxd3 Nb7 Qh6 Qf8 Qxf8+ Kxf8 hxg6 fxg6 Rxa4 Kf7 Rh4 Ke8 Bxe6 Bxd3 a4 Nc5 Bd5 Rac8 a5 Rd7 Bf3 h5 Rc1
18/59+ 00:28 244875191 8521844 +2.81 Rxd4 Rc7 h5 cxd3 cxd3 Nb7 Qh6 Qf8 Qxf8+ Kxf8 hxg6 fxg6 Rxa4 Kf7 Rh4 Ke8 Bxe6 Bxd3 a4 Nc5 Bd5 Rac8 a5 Rd7 Bf3 Bf5 a6 Ra7 Be2 h5 Bb5+ Bd7 Bc4 Be6 Kg2
18/67+ 00:32 283777298 8635423 +2.98 Rxd4 Rc7 h5 cxd3 cxd3 Nb7 Qh6 Qf8 Qxf8+ Kxf8 hxg6 fxg6 Rxa4 Kf7 Rh4 Ke8 Bxe6 Bxd3 a4 Nc5 Bd5 Rac8 a5 Rd7 Bf3 Bf5 a6 Ra7 Be2 h5 Bb5+ Bd7 Bc4 Be6 Kg2
18/67+ 00:45 402357936 8870129 +3.22 Rxd4 Rc7 h5 cxd3 cxd3 Nb7 Qh6 Qf8 Qxf8+ Kxf8 hxg6 fxg6 Rxa4 Kf7 Rh4 Ke8 Bxe6 Bxd3 a4 Nc5 Bd5 Rac8 a5 Rd7 Bf3 Bf5 a6 Ra7 Be2 h5 Bb5+ Bd7 Bc4 Be6 Kg2
18/67 00:54 490142111 8912160 +3.17 Rxd4 Rc6 Rd7 cxd3 cxd3 Qf8 Bg2 h6 Qg4 Bb5 h5 g5 Bxc6 Bxc6 Rc7 Rb8 Rc1 Qxa3 R7xc6 Nxc6 Rxc6 Qa2 Rc7 Rb1+ Kg2 Qd5+ Qe4 Qxe4+ dxe4 Rb8 Kf3 Rb3+ Ke2 Rb2+ Ke3
19/67 01:09 629775400 9057215 +3.32 Rxd4 Rc7 h5 cxd3 cxd3 Nb7 Qh6 Qf8 Qxf8+ Kxf8 hxg6 fxg6 Rxa4 Kf7 Rb1 Nc5 Rc1 Bb7 Rxa8 Bxa8 Bd8 Rd7 Rxc5 Rxd8 Rc7+ Kf8 Rxh7 Bd5 Rh8+ Ke7 Rxd8 Kxd8 a4 Bb3 a5 Kc7 Bg2 g5 Be4 Kb8 Kg2 Ka7 Kf3
20/67 01:26 796839726 9229304 +3.23 Rxd4 Rc7 h5 Bb7 dxc4 Nxc4 Qh6 Qf8 Qxf8+ Kxf8 hxg6 fxg6 Bxe6 Na5 Rad1 Bc6 Ba2 Nb7 e6 Ke8 Bc4 Rac8 c3 Bf3 Bb5+ Bc6 Be2 Kf8 Rf4 Kg8 e7 Kf7 Bg5+ Kg7 c4
21/67 02:10 1255112901 9604916 +3.27 Rxd4 Rc7 h5 cxd3 cxd3 Nb7 Qh6 Qf8 Qxf8+ Kxf8 hxg6 fxg6 Rxa4 Kf7 Rb1 Nc5 Rc1 Bb7 Rxa8 Bxa8 Bd8 Rd7 Rxc5 Rxd8 Rc7+ Kf8 Rxh7 Bd5 a4 Ba2 Rh8+ Ke7 Rxd8 Kxd8 a5 Kc7 Bg2 Kb8 Be4 Ka7 Kg2 Ka6 Bxg6 Kxa5 Be4 Kb6
22/67 03:43 2208968969 9897390 +3.33 Rxd4 Rc7 h5 cxd3 cxd3 Nb7 Qh6 Qf8 Qxf8+ Kxf8 hxg6 fxg6 Rxa4 Kf7 Rb1 Nc5 Rc1 Bb7 Rxa8 Bxa8 Bd8 Rd7 Rxc5 Rxd8 Rc7+ Kf8 Rxh7 Bd5 a4 Bb3 a5 Rxd3 Bf1 Rd1 Rc7 Ba4 Kg2 Bb3 a6 Bd5+ Kg1 Ke8 a7 Ra1 f4
23/67+ 07:37 4640794963 10139027 +3.54 Rxd4 Rc7 h5 cxd3 cxd3 Nb7 Qh6 Qf8 Qxf8+ Kxf8 hxg6 fxg6 Rxa4 Kf7 Rb1 Nc5 Rc1 Bb7 Rxa8 Bxa8 Bd8 Rd7 Rxc5 Rxd8 Rc7+ Kf8 Rxh7 Bd5 a4 Ba2 a5 Kg8 Ra7 Rxd3 Bf1 Rd1 Rc7 Bd5 a6 Ra1 a7 Kf8 f4 Ke8 Kf2 Kd8 Rh7 Kc8
23/69+ 12:43 7810148405 10235635 +3.75 Rxd4 Rc7 h5 cxd3 cxd3 Nb7 Qh6 Qf8 Qxf8+ Kxf8 hxg6 fxg6 Rxa4 Kf7 Rb1 Nc5 Rc1 Bb7 Rxa8 Bxa8 Bd8 Rd7 Rxc5 Rxd8 Rc7+ Kf8 Rxh7 Bd5 a4 Ba2 a5 Kg8 Ra7 Rxd3 Bf1 Rd1 Rc7 Bd5 a6 Ra1 a7 Kf8 f4 Ke8 Kf2 Kd8 Rh7 Kc8
23/69 19:48 12342046261 10382093 +3.93 Rxd4 Rc7 h5 Bb7 dxc4 Nxc4 Qh6 Qf8 Qxf8+ Kxf8 hxg6 fxg6 Bxe6 Ba6 Rad1 Bb5 Bd8 Rxd8 Rxd8+ Ke7 Bxc4 Rxc4 Rb8 Be8 Rb7+ Ke6 Rxh7 Rc3 Rd6+ Kxe5 Rd3 Rxd3 cxd3 Kd4 Rh8 Bf7 Rh4+ Kxd3 Rxa4 Bd5 Rg4 Be4 Kf1 Bf5 Rb4 Be6 Kg2 Bd5+ f3
24/69 33:57 21436374014 10520997 +4.03 Rxd4 Rc7 h5 cxd3 cxd3 Nb3 hxg6 fxg6 Rd6 Bb7 Bxe6+ Qxe6 Rxe6 Nd4 Qe3 Nxe6 Qb6 Ra6 Qb5 Kf7 Kh2 Rac6 Qxa4 Rc2 Rf1 R2c3 Qh4 Kg8 Qb4 Rxd3 a4 Rdc3 a5 Kf7 Rb1 h5 Rd1 Rc2 Qb6 Bf3 Rd3 Be4 Rd6 Rc1

Rodolfo Leoni

Joined: 29 Nov 2010
Posts: 263

Posted: Mon Jun 25, 2012 12:38 pm Post subject: Re: The best move

zullil wrote:

Jack Lad wrote:

[d] r1r1q1k1/5p1p/b3pBp1/n3P1Q1/p1ppR2P/P2P2PB/2P2P2/R5K1 w - - 0 27

Critter-1.4 prefers Rxd4 followed by h5:

Code:

They both have the same PV, as there's a transposition with firts 3 plies....
_________________
Rodolfo (The Baron Team)

Matthew R. Brades

Joined: 17 Jul 2011
Posts: 800

Posted: Mon Jun 25, 2012 4:11 pm Post subject: Re: The best move

IMO this is a position which sorts tactical play (Rxd4 wins a pawn) against positional play (h5 increases pressure against the Black king). JM2C. Matthew:out _________________ Well, that's that. Account. Gone.

Terry McCracken

Joined: 01 Aug 2007
Posts: 10782
Location: Canada

Posted: Mon Jun 25, 2012 8:04 pm Post subject: Re: The best move

ZirconiumX wrote:

IMO this is a position which sorts tactical play (Rxd4 wins a pawn) against positional play (h5 increases pressure against the Black king).

JM2C.

Matthew:out

That's true..(but what is more important in this position?), and that is what a program needs to ask.
_________________
Terry McCracken

kgburcham

Joined: 17 Feb 2008
Posts: 1309

Posted: Mon Jun 25, 2012 11:25 pm Post subject: Re: The best move

Terry McCracken wrote:

ZirconiumX wrote:

IMO this is a position which sorts tactical play (Rxd4 wins a pawn) against positional play (h5 increases pressure against the Black king).
JM2C.
Matthew:out

That's true..(but what is more important in this position?), and that is what a program needs to ask.

Both moves scoring about 4, this is usually enough to win with best moves played.

Terry McCracken

Joined: 01 Aug 2007
Posts: 10782
Location: Canada

Posted: Mon Jun 25, 2012 11:35 pm Post subject: Re: The best move

kgburcham wrote:

Terry McCracken wrote:

ZirconiumX wrote:

IMO this is a position which sorts tactical play (Rxd4 wins a pawn) against positional play (h5 increases pressure against the Black king).
JM2C.
Matthew:out

That's true..(but what is more important in this position?), and that is what a program needs to ask.

Both moves scoring about 4, this is usually enough to win with best moves played.

But my point is what is truly the best way to go...we can choose h5 everytime. The machine needs to know why.
_________________
Terry McCracken

Mike Libanan

Joined: 01 Sep 2011
Posts: 123

Posted: Tue Jun 26, 2012 5:54 am Post subject: Re: The best move

Fischer played h5 in this position, and gave up a whole Q at h7 a few moves later, to deliver a mate with his spanish B. So maybe h5 is the best move : ), pawn grabbing with Rxd4 seems not to be inline with Fischers plan to deliver mate in this type of position. But Rxd4 can also transpose to the mating attack, though that would be 1 move slower I guess.

Terry McCracken

Joined: 01 Aug 2007
Posts: 10782
Location: Canada

Posted: Tue Jun 26, 2012 5:59 am Post subject: Re: The best move

MikeGL wrote:

Fischer played h5 in this position, and gave up a whole Q at h7 a few moves later, to deliver a mate with his spanish B.
So maybe h5 is the best move : ), pawn grabbing with Rxd4 seems not to be inline with Fischers plan to deliver mate in this type of position.

But Rxd4 can also transpose to the mating attack, though that would be 1 move slower I guess.

Yes, so to follow a logical plan, h5! is necessary. When computers master ideas they will be on a new level.
_________________
Terry McCracken

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