Which Programs Find the Tacking Move, 17. Qf5!

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Terry McCracken
Posts: 16465
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Location: Canada

Which Programs Find the Tacking Move, 17. Qf5!

Post by Terry McCracken »

[d]r3r1k1/pbp1qpp1/3p3p/2pnP3/5P2/3B3Q/PPPN2PP/4RRK1 w - - 0 17 bmQf5

Terry
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Dirt
Posts: 2851
Joined: Wed Mar 08, 2006 10:01 pm
Location: Irvine, CA, USA

Re: Which Programs Find the Tacking Move, 17. Qf5!

Post by Dirt »

Terry McCracken wrote:r3r1k1/pbp1qpp1/3p3p/2pnP3/5P2/3B3Q/PPPN2PP/4RRK1 w - - 0 17 bmQf5

Terry
On my Athlon 1700+

Toga 3.1.2 SE - 12 seconds
Spike 1.2 Turin - 2.75 minutes
Rybka 1.0 Beta - 9 seconds
Crafty 21.6 - 1.2 seconds
Fruit 05/11/03 - 3.75 minutes
Glaurung 2.0.1 - 33.5 seconds
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Eelco de Groot
Posts: 4698
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Which Programs Find the Tacking Move, 17. Qf5!

Post by Eelco de Groot »

The score does not go up very fast, but Qf5 stays the best move. Nc4 is temporarily sidetracking Checkov Beta:


[d]r3r1k1/pbp1qpp1/3p3p/2pnP3/5P2/3B3Q/PPPN2PP/4RRK1 w - -

Engine: Toga Checkov Beta 1f (256 MB)
by Thomas Gaksch and Fabien Letouzey

1/09 0:00 +0.57 1.exd6 Qxe1 2.Rxe1 Rxe1+ 3.Kf2 Nxf4 (71)

1/09 0:00 +0.60 1.Ra1 (75)

1/09 0:00 +0.71 1.Rd1 (87)

1/09 0:00 +0.79 1.Rf2 (110)

2/13 0:00 +1.00 1.Rf2 Rab8 (747)

3/13 0:00 +0.68 1.Rf2 Nb4 2.Nc4 Nxd3 3.cxd3 (2.405)

3/13 0:00 +0.70 1.c3 Qe6 2.Qh5 (3.252)

3/13 0:00 +0.72 1.Nc4 Rab8 2.Bf5 (3.872)

3/15 0:00 +0.95 1.Qf5 g6 2.Qg4 (10.826)

4/15 0:00 +1.21 1.Qf5 g6 2.Qg4 Nb4 (12.680)

5/20 0:00 +0.83 1.Qf5 g6 2.Qg4 h5 3.Qg3 (20.099)

6/20 0:00 +1.05 1.Qf5 g6 2.Qg4 h5 3.Qg3 h4 (59.543)

7/25 0:00 +0.85 1.Qf5 g6 2.Qg4 h5 3.Qg3 h4 4.exd6 Qxe1
5.Qxe1 Rxe1 6.Rxe1 cxd6 (98.013)

7/25 0:00 +0.99 1.a3 Rab8 2.Be4 dxe5 3.fxe5 Nb6
4.Qh5 Bxe4 5.Nxe4 (235.164)

7/25 0:00 +1.09 1.Be4 Rab8 2.Nc4 Qe6 3.Bf5 Qe7 4.e6 Kh8
5.exf7 Qxf7 (319.999)

8/32 0:01 +0.93 1.Be4 dxe5 2.fxe5 c4 3.e6 fxe6 4.Kh1 Qb4
5.c3 Qxb2 6.Nxc4 Qxa2 (763.535) 520

8/32 0:01 +1.01 1.a3 Rab8 2.c4 Nb6 3.Qf5 g6 4.Qg4 h5 (828.847) 520

9/32 0:03 +0.93 1.a3 Rab8 2.c4 Nb6 3.b4 Qd7 4.Bf5 Qa4
5.e6 fxe6 6.Bxe6+ Kh8 (1.749.907) 513

9/32 0:04 +1.04 1.Bb5 c6 2.Bd3 Nb4 3.Bf5 Nxa2 4.c3 Rad8
5.e6 Kh8 6.exf7 Qxf7 (2.064.365) 512

10/32 0:05 +0.87 1.Bb5 Red8 2.Qg3 Nb4 3.Nc4 c6 4.exd6 Qf6
5.Na5 cxb5 6.Nxb7 Nxc2 7.Nxd8 Qd4+
8.Qf2 Nxe1 9.Rxe1 Rxd8 (2.692.078) 512

10/36 0:09 +1.09 1.Be4 dxe5 2.fxe5 Rad8 3.Rf2 Bc8
4.Qh5 Nf4 5.Rxf4 Rxd2 6.Ref1 Be6 (4.848.355) 511

11/41 0:12 +0.98 1.Be4 dxe5 2.fxe5 Rad8 3.Rf2 Bc8
4.Qh5 Nf4 5.Rxf4 Rxd2 6.Re3 Red8
7.Rd3 R8xd3 8.Bxd3 (6.215.926) 515

11/41 0:13 +1.24 1.Qf5 g6 2.Qh3 Qf8 3.Qg3 Nb4 4.Ne4 Bxe4
5.Bxe4 d5 6.Bf5 Nxa2 (6.865.884) 518

12/41 0:18 +1.06 1.Qf5 g6 2.Qh3 Qf8 3.Qg3 Nb4 4.e6 Nxd3
5.cxd3 Kh8 6.f5 g5 7.Nc4 fxe6 8.Rxe6 (9.924.865) 521

12/41 0:32 +1.12 1.Nc4 dxe5 2.Qf5 g6 3.Qh3 h5 4.Qf3 Rad8
5.Nxe5 c4 6.Bxc4 Qb4 7.Rd1 (16.832.427) 523

13/43 0:54 +0.95 1.Nc4 dxe5 2.Qf5 g6 3.Qh3 h5 4.Qf3 Qf6
5.Rxe5 Rad8 6.Be4 Rxe5 7.Nxe5 Qh4
8.Rd1 (28.637.412) 526

13/43 0:58 +1.10 1.Qf5 g6 2.Qh3 Qf8 3.Bc4 Nb6 4.f5 Nxc4
5.Nxc4 g5 6.e6 Ba6 7.Qd3 Bxc4 8.Qxc4 Rab8
9.exf7+ Qxf7 10.Re6 (30.816.874) 528

14/46 1:33 +1.29 1.Qf5 g6 2.Qh3 Qf8 3.Ne4 Kh8 4.c4 Nb4
5.Nf6 Nxd3 6.Qxd3 Red8 7.Qc3 dxe5
8.Rxe5 Rab8 (49.635.116) 532

15/51 2:18 +1.55 1.Qf5 g6 2.Qh3 Qf8 3.Ne4 Kg7 4.Qg3 dxe5
5.fxe5 Kh8 6.Bb5 c6 7.Nd6 Re7 8.Bd3 Qg7
9.Rd1 (74.597.698) 540

16/57 5:48 +1.26 1.Qf5 g6 2.Qh3 dxe5 3.fxe5 Kg7 4.Qf3 Rad8
5.Ne4 Bc6 6.Nf6 Rf8 7.Qg3 c4 8.Be4 Kh8
9.Bxd5 Bxd5 10.Re3 (189.030.845) 541

17/58 10:28 +1.20 1.Qf5 g6 2.Qh3 dxe5 3.fxe5 Kg7 4.e6 fxe6
5.Qg3 Qg5 6.Qxg5 hxg5 7.Re5 Rf8
8.Rxg5 Nf4 9.Rxc5 Rf7 10.Nc4 Raf8
11.Ne5 Re7 12.Rf2 (341.163.556) 542

18/78 24:14 +1.26 1.Qf5 g6 2.Qh3 dxe5 3.fxe5 Kg7 4.Qf3 Rad8
5.Ne4 Bc6 6.Nf6 Rf8 7.Qg3 c4 8.Be4 Qc5+
9.Kh1 c3 10.bxc3 Kh8 11.Qh4 h5
12.Nxd5 Bxd5 13.Qf6+ Kh7 (797.418.503) 548
Eelco
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pedrox
Posts: 1056
Joined: Fri Mar 10, 2006 6:07 am
Location: Basque Country (Spain)

Re: Which Programs Find the Tacking Move, 17. Qf5!

Post by pedrox »

Qf5 is not the best move.

Code: Select all

Good Engine. Depth 21:

1. +-  (1.44): 17.Df3 Tad8 18.Cc4 dxe5 19.De4 g6 20.f5 f6 21.fxg6 Dg7 22.Ce3 Rh8 23.Tf2 Tf8 24.b3 
2. +-  (1.43): 17.a3 Tad8 18.Df5 g6 19.Dg4 Rh8 20.Dh3 Rg7 
3. +-  (1.43): 17.Df5 g6 18.Dh3 Rg7 19.a3 Tad8 20.b3 f5 

Qf3, a3 and Qf5
DanaSah also want Qf3

Code: Select all

FEN: r3r1k1/pbp1qpp1/3p3p/2pnP3/5P2/3B3Q/PPPN2PP/4RRK1 w - - 0 17 

DanaSah v.3.56 FRC:
   2	00:00	         833	83.300	+0,50	Dg4 g6
   2	00:00	       1.760	176.000	+0,64	Dh5 Dd7
   2	00:00	       2.514	251.400	+0,80	Cc4 Dd8 exd6 Txe1 Txe1 cxd6
   3	00:00	       3.334	333.400	+0,90	Cc4 dxe5 Cxe5 Tad8
   4	00:00	       6.033	603.300	+0,93	Cc4 Ac8 Ah7+ Rxh7 Dd3+ Rg8 Dxd5
   5	00:00	      22.117	552.925	+0,80	Cc4 Dd8 exd6 Txe1 Txe1 cxd6
   6	00:00	      50.092	715.600	+0,83	Cc4 dxe5 Txe5 Df6 Dd7 Txe5 Cxe5 g6
   7	00:00	     144.320	687.238	+0,70	Cc4 Aa6 Cxd6 Axd3 Dxd3 Cxf4 Txf4 cxd6
   8	00:00	     389.415	695.383	+0,68	Cc4 Aa6 Ca5 Axd3 Cc6 De6 Dxd3 a6 exd6 Dxd6
   8	00:01	     914.283	708.746	+0,71	Af5 Dd8 Cc4 Aa6 Dd3 dxe5 Txe5 Txe5 fxe5 Axc4 Dxc4
   9	00:02	   1.616.367	718.385	+0,64	Af5 dxe5 Db3 Cb4 Txe5 Dd6 Cf3 Axf3 Txe8+ Txe8 Txf3
   9	00:03	   2.338.469	730.771	+0,74	Cc4 dxe5 Txe5 Df6 Ca5 Ac6 Cxc6 Dxc6 Ah7+ Rxh7 Df5+ Dg6 Dxg6+ fxg6 Txd5
  10	00:04	   3.495.154	776.700	+0,63	Cc4 dxe5 Txe5 Df6 Dg3 g6 Dh3 Txe5 Cxe5 Dg7 c3 Te8
  10	00:07	   5.228.704	746.957	+0,97	Df5 g6 Dh3 Rg7 Cc4 dxe5 fxe5 Tad8 Tf2 Rh7 c3
  11	00:08	   5.915.987	739.498	+0,85	Df5 g6 Dh3 Rg7 Cc4 dxe5 fxe5 Tad8 Tf2 Rh7 Tef1 Tf8
  12	00:12	   9.128.308	730.264	+0,80	Df5 g6 Dh3 Rg7 Dg3 Tad8 e6 Df6 f5 Dd4+ Rh1 Dxb2 exf7 Txe1 Txe1
  13	00:35	  25.210.137	720.289	+0,80	Df5 g6 Dh3 Rg7 Cc4 dxe5 b3 Ac8 f5 Df6 Dg3 Dg5 Dxg5 hxg5 Cxe5 gxf5 Axf5 Axf5 Txf5
  14	01:00	  43.281.962	721.366	+0,92	Df5 g6 Dh3 Rg7 Cc4 dxe5 fxe5 Tad8 e6 f5 Ca5 c6 c3 Dc7 Cc4
  14	02:18	 102.320.869	741.455	+0,89	Df3 dxe5 Txe5 Df6 Txd5 Dxb2 Ac4 Axd5 Dxd5 Dd4+ Dxd4 cxd4 Cf3 Tad8 Ce5 Te7 Tb1 c5
  15	03:46	 169.486.953	749.942	+0,93	Df3 dxe5 Txe5 Df6 Txd5 Dxb2 Ac4 Axd5 Dxd5 Dd4+ Dxd4 cxd4 Cf3 c5 Ce5 Te7 Tb1 Tae8 Ad5
  16	05:33	 252.189.571	757.326	+0,89	Df3 dxe5 Txe5 Df6 Txd5 Dxb2 Ac4 Axd5 Dxd5 Dd4+ Dxd4 cxd4 Cf3 c5 Ce5 Te7 Tb1 Tae8 Ad5 a5
  17	17:57	 827.167.900	768.029	+1,00	Df3 Tad8 De4 g6 f5 Dxe5 fxg6 f6 c3 Rg7 Df3 Dxe1 Txe1 Txe1+ Cf1 Tde8 Df2 Rg8 Ac4
  18	31:21	1.449.620.157	770.664	+1,09	Df3 Tad8 De4 g6 f5 Dxe5 fxg6 f6 c3 Ac6 Cc4 Dh5 Df5 Dxf5 Axf5 Ab5 Ad3 Ad7 Ae4
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Terry McCracken
Posts: 16465
Joined: Wed Aug 01, 2007 4:16 am
Location: Canada

Re: Which Programs Find the Tacking Move, 17. Qf5!

Post by Terry McCracken »

pedrox wrote:Qf5 is not the best move.

Code: Select all

Good Engine. Depth 21:

1. +-  (1.44): 17.Df3 Tad8 18.Cc4 dxe5 19.De4 g6 20.f5 f6 21.fxg6 Dg7 22.Ce3 Rh8 23.Tf2 Tf8 24.b3 
2. +-  (1.43): 17.a3 Tad8 18.Df5 g6 19.Dg4 Rh8 20.Dh3 Rg7 
3. +-  (1.43): 17.Df5 g6 18.Dh3 Rg7 19.a3 Tad8 20.b3 f5 

Qf3, a3 and Qf5
DanaSah also want Qf3

Code: Select all

FEN: r3r1k1/pbp1qpp1/3p3p/2pnP3/5P2/3B3Q/PPPN2PP/4RRK1 w - - 0 17 

DanaSah v.3.56 FRC:
   2	00:00	         833	83.300	+0,50	Dg4 g6
   2	00:00	       1.760	176.000	+0,64	Dh5 Dd7
   2	00:00	       2.514	251.400	+0,80	Cc4 Dd8 exd6 Txe1 Txe1 cxd6
   3	00:00	       3.334	333.400	+0,90	Cc4 dxe5 Cxe5 Tad8
   4	00:00	       6.033	603.300	+0,93	Cc4 Ac8 Ah7+ Rxh7 Dd3+ Rg8 Dxd5
   5	00:00	      22.117	552.925	+0,80	Cc4 Dd8 exd6 Txe1 Txe1 cxd6
   6	00:00	      50.092	715.600	+0,83	Cc4 dxe5 Txe5 Df6 Dd7 Txe5 Cxe5 g6
   7	00:00	     144.320	687.238	+0,70	Cc4 Aa6 Cxd6 Axd3 Dxd3 Cxf4 Txf4 cxd6
   8	00:00	     389.415	695.383	+0,68	Cc4 Aa6 Ca5 Axd3 Cc6 De6 Dxd3 a6 exd6 Dxd6
   8	00:01	     914.283	708.746	+0,71	Af5 Dd8 Cc4 Aa6 Dd3 dxe5 Txe5 Txe5 fxe5 Axc4 Dxc4
   9	00:02	   1.616.367	718.385	+0,64	Af5 dxe5 Db3 Cb4 Txe5 Dd6 Cf3 Axf3 Txe8+ Txe8 Txf3
   9	00:03	   2.338.469	730.771	+0,74	Cc4 dxe5 Txe5 Df6 Ca5 Ac6 Cxc6 Dxc6 Ah7+ Rxh7 Df5+ Dg6 Dxg6+ fxg6 Txd5
  10	00:04	   3.495.154	776.700	+0,63	Cc4 dxe5 Txe5 Df6 Dg3 g6 Dh3 Txe5 Cxe5 Dg7 c3 Te8
  10	00:07	   5.228.704	746.957	+0,97	Df5 g6 Dh3 Rg7 Cc4 dxe5 fxe5 Tad8 Tf2 Rh7 c3
  11	00:08	   5.915.987	739.498	+0,85	Df5 g6 Dh3 Rg7 Cc4 dxe5 fxe5 Tad8 Tf2 Rh7 Tef1 Tf8
  12	00:12	   9.128.308	730.264	+0,80	Df5 g6 Dh3 Rg7 Dg3 Tad8 e6 Df6 f5 Dd4+ Rh1 Dxb2 exf7 Txe1 Txe1
  13	00:35	  25.210.137	720.289	+0,80	Df5 g6 Dh3 Rg7 Cc4 dxe5 b3 Ac8 f5 Df6 Dg3 Dg5 Dxg5 hxg5 Cxe5 gxf5 Axf5 Axf5 Txf5
  14	01:00	  43.281.962	721.366	+0,92	Df5 g6 Dh3 Rg7 Cc4 dxe5 fxe5 Tad8 e6 f5 Ca5 c6 c3 Dc7 Cc4
  14	02:18	 102.320.869	741.455	+0,89	Df3 dxe5 Txe5 Df6 Txd5 Dxb2 Ac4 Axd5 Dxd5 Dd4+ Dxd4 cxd4 Cf3 Tad8 Ce5 Te7 Tb1 c5
  15	03:46	 169.486.953	749.942	+0,93	Df3 dxe5 Txe5 Df6 Txd5 Dxb2 Ac4 Axd5 Dxd5 Dd4+ Dxd4 cxd4 Cf3 c5 Ce5 Te7 Tb1 Tae8 Ad5
  16	05:33	 252.189.571	757.326	+0,89	Df3 dxe5 Txe5 Df6 Txd5 Dxb2 Ac4 Axd5 Dxd5 Dd4+ Dxd4 cxd4 Cf3 c5 Ce5 Te7 Tb1 Tae8 Ad5 a5
  17	17:57	 827.167.900	768.029	+1,00	Df3 Tad8 De4 g6 f5 Dxe5 fxg6 f6 c3 Rg7 Df3 Dxe1 Txe1 Txe1+ Cf1 Tde8 Df2 Rg8 Ac4
  18	31:21	1.449.620.157	770.664	+1,09	Df3 Tad8 De4 g6 f5 Dxe5 fxg6 f6 c3 Ac6 Cc4 Dh5 Df5 Dxf5 Axf5 Ab5 Ad3 Ad7 Ae4
According to your engine it isn't the best move, but nonetheless it is the best move.

Terry
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Terry McCracken
Posts: 16465
Joined: Wed Aug 01, 2007 4:16 am
Location: Canada

Re: Which Programs Find the Tacking Move, 17. Qf5!

Post by Terry McCracken »

Dirt wrote:
Terry McCracken wrote:r3r1k1/pbp1qpp1/3p3p/2pnP3/5P2/3B3Q/PPPN2PP/4RRK1 w - - 0 17 bmQf5

Terry
On my Athlon 1700+

Toga 3.1.2 SE - 12 seconds
Spike 1.2 Turin - 2.75 minutes
Rybka 1.0 Beta - 9 seconds
Crafty 21.6 - 1.2 seconds
Fruit 05/11/03 - 3.75 minutes
Glaurung 2.0.1 - 33.5 seconds
Thanks Greg.

Terry
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Terry McCracken
Posts: 16465
Joined: Wed Aug 01, 2007 4:16 am
Location: Canada

Re: Which Programs Find the Tacking Move, 17. Qf5!

Post by Terry McCracken »

Eelco de Groot wrote:The score does not go up very fast, but Qf5 stays the best move. Nc4 is temporarily sidetracking Checkov Beta:


[d]r3r1k1/pbp1qpp1/3p3p/2pnP3/5P2/3B3Q/PPPN2PP/4RRK1 w - -

Engine: Toga Checkov Beta 1f (256 MB)
by Thomas Gaksch and Fabien Letouzey

1/09 0:00 +0.57 1.exd6 Qxe1 2.Rxe1 Rxe1+ 3.Kf2 Nxf4 (71)

1/09 0:00 +0.60 1.Ra1 (75)

1/09 0:00 +0.71 1.Rd1 (87)

1/09 0:00 +0.79 1.Rf2 (110)

2/13 0:00 +1.00 1.Rf2 Rab8 (747)

3/13 0:00 +0.68 1.Rf2 Nb4 2.Nc4 Nxd3 3.cxd3 (2.405)

3/13 0:00 +0.70 1.c3 Qe6 2.Qh5 (3.252)

3/13 0:00 +0.72 1.Nc4 Rab8 2.Bf5 (3.872)

3/15 0:00 +0.95 1.Qf5 g6 2.Qg4 (10.826)

4/15 0:00 +1.21 1.Qf5 g6 2.Qg4 Nb4 (12.680)

5/20 0:00 +0.83 1.Qf5 g6 2.Qg4 h5 3.Qg3 (20.099)

6/20 0:00 +1.05 1.Qf5 g6 2.Qg4 h5 3.Qg3 h4 (59.543)

7/25 0:00 +0.85 1.Qf5 g6 2.Qg4 h5 3.Qg3 h4 4.exd6 Qxe1
5.Qxe1 Rxe1 6.Rxe1 cxd6 (98.013)

7/25 0:00 +0.99 1.a3 Rab8 2.Be4 dxe5 3.fxe5 Nb6
4.Qh5 Bxe4 5.Nxe4 (235.164)

7/25 0:00 +1.09 1.Be4 Rab8 2.Nc4 Qe6 3.Bf5 Qe7 4.e6 Kh8
5.exf7 Qxf7 (319.999)

8/32 0:01 +0.93 1.Be4 dxe5 2.fxe5 c4 3.e6 fxe6 4.Kh1 Qb4
5.c3 Qxb2 6.Nxc4 Qxa2 (763.535) 520

8/32 0:01 +1.01 1.a3 Rab8 2.c4 Nb6 3.Qf5 g6 4.Qg4 h5 (828.847) 520

9/32 0:03 +0.93 1.a3 Rab8 2.c4 Nb6 3.b4 Qd7 4.Bf5 Qa4
5.e6 fxe6 6.Bxe6+ Kh8 (1.749.907) 513

9/32 0:04 +1.04 1.Bb5 c6 2.Bd3 Nb4 3.Bf5 Nxa2 4.c3 Rad8
5.e6 Kh8 6.exf7 Qxf7 (2.064.365) 512

10/32 0:05 +0.87 1.Bb5 Red8 2.Qg3 Nb4 3.Nc4 c6 4.exd6 Qf6
5.Na5 cxb5 6.Nxb7 Nxc2 7.Nxd8 Qd4+
8.Qf2 Nxe1 9.Rxe1 Rxd8 (2.692.078) 512

10/36 0:09 +1.09 1.Be4 dxe5 2.fxe5 Rad8 3.Rf2 Bc8
4.Qh5 Nf4 5.Rxf4 Rxd2 6.Ref1 Be6 (4.848.355) 511

11/41 0:12 +0.98 1.Be4 dxe5 2.fxe5 Rad8 3.Rf2 Bc8
4.Qh5 Nf4 5.Rxf4 Rxd2 6.Re3 Red8
7.Rd3 R8xd3 8.Bxd3 (6.215.926) 515

11/41 0:13 +1.24 1.Qf5 g6 2.Qh3 Qf8 3.Qg3 Nb4 4.Ne4 Bxe4
5.Bxe4 d5 6.Bf5 Nxa2 (6.865.884) 518

12/41 0:18 +1.06 1.Qf5 g6 2.Qh3 Qf8 3.Qg3 Nb4 4.e6 Nxd3
5.cxd3 Kh8 6.f5 g5 7.Nc4 fxe6 8.Rxe6 (9.924.865) 521

12/41 0:32 +1.12 1.Nc4 dxe5 2.Qf5 g6 3.Qh3 h5 4.Qf3 Rad8
5.Nxe5 c4 6.Bxc4 Qb4 7.Rd1 (16.832.427) 523

13/43 0:54 +0.95 1.Nc4 dxe5 2.Qf5 g6 3.Qh3 h5 4.Qf3 Qf6
5.Rxe5 Rad8 6.Be4 Rxe5 7.Nxe5 Qh4
8.Rd1 (28.637.412) 526

13/43 0:58 +1.10 1.Qf5 g6 2.Qh3 Qf8 3.Bc4 Nb6 4.f5 Nxc4
5.Nxc4 g5 6.e6 Ba6 7.Qd3 Bxc4 8.Qxc4 Rab8
9.exf7+ Qxf7 10.Re6 (30.816.874) 528

14/46 1:33 +1.29 1.Qf5 g6 2.Qh3 Qf8 3.Ne4 Kh8 4.c4 Nb4
5.Nf6 Nxd3 6.Qxd3 Red8 7.Qc3 dxe5
8.Rxe5 Rab8 (49.635.116) 532

15/51 2:18 +1.55 1.Qf5 g6 2.Qh3 Qf8 3.Ne4 Kg7 4.Qg3 dxe5
5.fxe5 Kh8 6.Bb5 c6 7.Nd6 Re7 8.Bd3 Qg7
9.Rd1 (74.597.698) 540

16/57 5:48 +1.26 1.Qf5 g6 2.Qh3 dxe5 3.fxe5 Kg7 4.Qf3 Rad8
5.Ne4 Bc6 6.Nf6 Rf8 7.Qg3 c4 8.Be4 Kh8
9.Bxd5 Bxd5 10.Re3 (189.030.845) 541

17/58 10:28 +1.20 1.Qf5 g6 2.Qh3 dxe5 3.fxe5 Kg7 4.e6 fxe6
5.Qg3 Qg5 6.Qxg5 hxg5 7.Re5 Rf8
8.Rxg5 Nf4 9.Rxc5 Rf7 10.Nc4 Raf8
11.Ne5 Re7 12.Rf2 (341.163.556) 542

18/78 24:14 +1.26 1.Qf5 g6 2.Qh3 dxe5 3.fxe5 Kg7 4.Qf3 Rad8
5.Ne4 Bc6 6.Nf6 Rf8 7.Qg3 c4 8.Be4 Qc5+
9.Kh1 c3 10.bxc3 Kh8 11.Qh4 h5
12.Nxd5 Bxd5 13.Qf6+ Kh7 (797.418.503) 548
Eelco
Thanks as well Eelco.

Terry
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pedrox
Posts: 1056
Joined: Fri Mar 10, 2006 6:07 am
Location: Basque Country (Spain)

Re: Which Programs Find the Tacking Move, 17. Qf5!

Post by pedrox »

Terry McCracken wrote:
According to your engine it isn't the best move, but nonetheless it is the best move.

Terry
Not only is my engine, the first results that I have given are of Fritz 10 after 4 hours.

I believe that if you let the engines to think more about this position is possible they do other moves, the difference between some of them as Qf5, Qf3 and a3 are minimal, you not can talk "better move".
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pedrox
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Joined: Fri Mar 10, 2006 6:07 am
Location: Basque Country (Spain)

Re: Which Programs Find the Tacking Move, 17. Qf5!

Post by pedrox »

Another example Toga 1.2.1a.

In the first 10 minutes believes that Qf5 is the best move, but then ...

Code: Select all

Depth 18, time 30 minutes

Analysis by Toga II 1.2.1a:

1. ±  (1.18): 17.Df3 Tab8 18.Ae4 c6 19.c4 dxe5 20.fxe5 Cc7 21.Df5 g6 22.Df4 Rg7 23.Dg3 Ted8 24.Td1 Aa6 25.b3 Rh8 26.Cf3 
2. ±  (1.08): 17.Df5 g6 18.Dh3 dxe5 19.fxe5 Rg7 20.Df3 f5 21.exf6+ Dxf6 22.Dxf6+ Cxf6 23.Cb3 Ae4 24.Cxc5 Axd3 25.Cxd3 Tab8 26.b3 Tbd8 27.Cc5 Rf7 28.Cb7 Tb8 
3. ±  (1.04): 17.Cc4 dxe5 18.Txe5 Df6 19.Df3 Txe5 20.Cxe5 Td8 21.Ac4 De6 22.Te1 Df5 23.Db3 Aa8 24.g3 f6 25.Cd3 Rh7 26.Db5 Cb6 27.Te7 

(,  12.01.2008)

Qf3, Qf5, then Nc4
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Terry McCracken
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Location: Canada

Re: Which Programs Find the Tacking Move, 17. Qf5!

Post by Terry McCracken »

pedrox wrote:
Terry McCracken wrote:
According to your engine it isn't the best move, but nonetheless it is the best move.

Terry
Not only is my engine, the first results that I have given are of Fritz 10 after 4 hours.

I believe that if you let the engines to think more about this position is possible they do other moves, the difference between some of them as Qf5, Qf3 and a3 are minimal, you not can talk "better move".
Exuse me? I Know that 17. Qf5! is Best and what its Purpose serves as I played it OTB and Understand the logical follow up!

After 17. Qf5!..g6 (forced) 18. Qh3 and Black now faces eventual doom, 18..Kg7 19. f5!..de 20. fg!..fg (if 20..f6?! 21. Ne4!!+− ) 21. Qg4!..Qg5 22. Qe4!..Re6 22. Nb3..Qe7 23. c4!+− .

There's a lot more, but you get the picture...or you should.
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