Simple exchange sac

[muxecoid]

From my game on company's championship.
[D]r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 6 16

Some engines see it immediately other need a few seconds.

[Ajedrecista]

Hello Michael:

From my game on company's championship.
[D]r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 6 16

Some engines see it immediately other need a few seconds.

I did not get the sac with any engine (it is true that analysis were short), so I toyed a little with Houdini and my ideas until I got in few time to 16.- ..., Rxf3; 17.- gxf3, Qh4; 18.- Kh2, Rf8; 19.- Qb2, Nf4; 20.- Bxf4, Rxf4. Surely it is not what you was referring to, but this line gives a small advantage for black according to Houdini 1.5a.

Analysis by Houdini 1.5a w32 (using two cores) in an Intel Pentium D930 (3GHz), with 512 MB of hash and 64 MB for the full set of Gaviota TB, running under Arena 2-.0.1 GUI:

[d]6n1/bpp3pk/p2pp2p/4p3/PP2Pr1q/2PP1PNP/1Q3P1K/R4R2 w - - 0 21

FEN: 6n1/bpp3pk/p2pp2p/4p3/PP2Pr1q/2PP1PNP/1Q3P1K/R4R2 w - - 0 21

Houdini_15a_w32:
4/12 00:00 895 0 +0,54 Qb2e2 Ng8e7 Rf1g1 Rf4f8
5/13 00:00 1.424 0 +0,54 Qb2e2 Ng8e7 Rf1g1 Rf4f8 a4a5
6/13 00:00 2.087 0 +0,54 Qb2e2 Ng8e7 Rf1g1 Rf4f8 a4a5 Qh4f4
7/18 00:00 4.332 0 +0,46 Qb2e2 Ng8e7 Rf1e1 Rf4f8 Re1g1 Qh4f4 a4a5
8/20 00:00 8.206 248.000 +0,51 Qb2e2 Ng8e7 Rf1e1 Rf4f8 Re1g1 Qh4f4 a4a5 d6d5
9/20 00:00 12.949 340.000 +0,46 Qb2e2 Ng8e7 Rf1g1 Rf4f8 a4a5 Qh4f4 Ra1e1 Qf4xf3 Qe2xf3 Rf8xf3
10/20 00:00 20.811 341.000 +0,48 Qb2e2 Ng8e7 Rf1g1 Rf4f8 a4a5 Qh4f4 Rg1g2 Qf4xf3 Qe2xf3 Rf8xf3 Ng3h5 Rf3xf2 Rg2xf2 Ba7xf2
11/23- 00:00 47.882 488.000 +0,42 Qb2e2 Ng8e7
11/25- 00:00 96.155 616.000 +0,30 Qb2e2 Ng8e7
11/26- 00:00 168.416 722.000 +0,03 Qb2e2 Ng8e7
11/30 00:00 306.571 794.000 +0,24 b4b5 Rf4xf3 Qb2e2 Rf3f8 b5xa6 b7xa6 Ra1d1 Ng8f6 d3d4 e5xd4 c3xd4 Ba7b6 e4e5 d6xe5 d4xe5 Nf6d5 Qe2e4+ Qh4xe4 Ng3xe4
12/32- 00:01 417.024 822.000 +0,18 b4b5 Rf4xf3
12/32 00:01 592.897 848.000 +0,12 b4b5 Rf4xf3 Qb2e2 Rf3f8 b5xa6 b7xa6 a4a5 Ng8e7 Ra1a2 Ne7g6 Ng3h5 Ng6f4 Nh5xf4 Qh4xf4+ Kh2h1 Rf8b8 Rf1g1
13/32+ 00:01 776.011 873.000 +0,18 b4b5
13/32 00:01 1.092.566 909.000 +0,10 b4b5 Rf4xf3 Qb2e2 Rf3f8 b5xa6 b7xa6 Ra1a2 Ng8e7 Ra2b2 Ne7g6 Rb2b7 Ng6f4 Qe2g4 Qh4xg4 h3xg4 Ba7b6 d3d4 Nf4d3 f2f3 e5xd4 c3xd4 Bb6xd4 Rb7xc7
14/32 00:02 2.148.825 961.000 +0,12 b4b5 Rf4xf3 Qb2e2 Rf3f4 b5xa6 b7xa6 Kh2g2 Ng8f6 a4a5 Nf6d7 Ra1b1 Nd7c5 Kg2h2 Nc5a4 Qe2c2 Na4c5 f2f3 Rf4f8 d3d4 e5xd4 c3xd4
15/32- 00:03 2.733.225 969.000 +0,06 b4b5 Rf4xf3
15/36 00:06 6.034.808 990.000 0,00 b4b5 Ng8e7 b5xa6 Ne7g6 a6xb7 Qh4xh3+ Kh2xh3 Rf4h4+ Kh3g2 Ng6f4+ Kg2g1 Nf4h3+ Kg1h2 Nh3f4+ Kh2g1 Nf4h3+
16/44- 00:10 10.040.176 989.000 -0,05 b4b5 Ng8e7
16/44 00:17 17.553.349 1.006.000 -0,01 b4b5 Ng8e7 b5xa6 Ne7g6 Qb2e2 Rf4f7 f3f4 Ng6xf4 Qe2g4 Qh4xg4 h3xg4 b7xa6 Ra1d1 Kh7g6 Rd1d2 Kg6g5 Ng3e2 Nf4xe2 Rd2xe2 Rf7f3 Re2d2 Kg5h4 a4a5 g7g5 Kh2g2 Kh4xg4 Rf1b1 h6h5 Rb1b7
17/50- 00:20 19.744.309 1.008.000 -0,07 b4b5 Ng8e7
17/50- 00:35 35.734.577 1.014.000 -0,19 b4b5 Ng8e7
17/50 00:44 44.717.036 1.018.000 -0,13 d3d4 Rf4xf3 Ra1d1 Qh4f4 Qb2d2 Qf4f6 b4b5 Ng8e7 b5xa6 b7xa6 Qd2e2 Rf3xc3 d4xe5 Qf6xe5 Rd1c1 a6a5 Rc1xc3 Qe5xc3 Rf1b1 Ba7c5 Rb1b7 Bc5b6
17/50 00:47 48.199.819 1.018.000 -0,11 Ra1d1 Ng8e7 d3d4 e5xd4 c3xd4 Rf4xf3 Qb2e2 Rf3a3 d4d5 Ne7g6 d5xe6 Ng6f4 Qe2g4 Qh4xg4 h3xg4 Nf4xe6 Rd1a1 Ra3xa1 Rf1xa1 Ba7xf2 Kh2g2 Bf2d4 Ra1c1 c7c5 b4xc5 Ne6xc5 Ng3f5 Bd4e5 Rc1b1 Kh7g6
18/50 00:50 50.762.008 1.018.000 -0,11 Ra1d1 Ng8e7 d3d4 e5xd4 c3xd4 Rf4xf3 Qb2e2 Rf3a3 d4d5 Ne7g6 d5xe6 Ng6f4 Qe2g4 Qh4xg4 h3xg4 Nf4xe6 Rd1a1 Ra3b3 Ra1b1 Rb3xb1 Rf1xb1 Ba7xf2 Ng3f5 g7g6 Nf5e7 Bf2d4 Kh2g2 Bd4e5 Ne7d5 Kh7g7
19/50- 01:04 65.396.174 1.023.000 -0,17 Ra1d1 Ng8e7
19/51- 01:23 84.936.456 1.021.000 -0,29 Ra1d1 Ng8e7
19/63 03:24 204.631.787 1.004.000 -0,28 Ra1d1 Ng8e7 d3d4 Ne7g6 Rd1d3 d6d5 Qb2d2 Rf4f7 Ng3e2 d5xe4 f3xe4 Rf7xf2+ Rf1xf2 Qh4xf2+ Kh2h1 Qf2f1+ Kh1h2 Ng6h4 Ne2g1 e5xd4 c3xd4 e6e5 Qd2e2 Qf1f4+ Kh2h1 Ba7xd4 Ng1f3 Nh4xf3 Rd3xf3 Qf4g5 Rf3f1 Qg5g3 Qe2g4
20/63+ 03:27 208.617.246 1.006.000 -0,22 Ra1d1
20/63- 03:39 219.870.777 1.005.000 -0,34 Ra1d1 Ng8e7
20/63- 06:46 411.608.794 1.014.000 -0,46 Ra1d1 Ng8e7
20/63 08:54 543.731.957 1.017.000 -0,39 b4b5 Ng8e7 b5b6 c7xb6 Qb2e2 Ne7g6 Rf1d1 Rf4f8 d3d4 Ba7b8 Ra1b1 Bb8c7 Rb1b3 Qh4g5 d4xe5 Ng6xe5 c3c4 Rf8f7 Kh2g2 Kh7g8 Qe2d2 Qg5h4 Qd2d4 Rf7f8 Ng3e2 Qh4g5+
21/63 11:28 703.723.522 1.022.000 -0,40 b4b5 Ng8e7 b5b6 c7xb6 Qb2e2 Ne7g6 Rf1d1 Rf4f8 Ra1a2 Qh4g5 Qe2e3 Ng6f4 Rd1h1 Ba7b8 Kh2g1 Bb8c7 h3h4 Qg5f6 Ra2b2 d6d5 d3d4 g7g6 e4xd5 e5xd4 Qe3xd4 e6xd5 Qd4xf6 Rf8xf6
21/63 15:00 925.385.977 1.028.000 -0,40 b4b5 Ng8e7 b5b6 c7xb6 Qb2e2 Ne7g6 Rf1d1 Rf4f8 Ra1a2 Qh4g5 Qe2e3 Ng6f4 Rd1h1 Ba7b8 Kh2g1 Bb8c7 h3h4 Qg5f6 Ra2b2 Rf8c8

I stopped the analysis after fifteen minutes; there were not TB hits.

I wonder which is the sac you wrote about; my line seems good but better analysis are needed, just for verification purposes.

Regards from Spain.

Ajedrecista.

[Dschmitt]

Komodo 5 never went that direction, though I did only give it 20 minutes.

FEN: r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 6 16

Komodo-5-64bit:
1 00:00 107 53,529 -0.29 Ba7xe3 f2xe3 Ng8-f6
2 00:00 260 37,143 -0.29 Ba7xe3 f2xe3 Ng8-f6
3 00:00 581 48,420 -0.24 Ba7xe3 f2xe3 Ng6-h4 Nf3xh4
4 00:00 2,112 111,163 -0.20 Ba7xe3 f2xe3 Ng6-h4 Qc1-d1 Nh4xf3+ Rf1xf3 Ng8-f6
5 00:00 2,829 113,153 -0.16 Ba7xe3 f2xe3 Ng6-h4 Qc1-b2 Nh4xf3+ Rf1xf3 Rf8xf3 g2xf3
5 00:00 2,924 116,952 -0.16 Ba7xe3 f2xe3 Ng6-h4 Qc1-b2 Nh4xf3+ Rf1xf3 Rf8xf3 g2xf3
6 00:00 4,002 148,219 -0.10 Ba7xe3 f2xe3 Ng6-h4 Qc1-d1 Nh4xf3+ Rf1xf3 Ng8-f6 Qd1-b3 Qd8-d7
6 00:00 4,195 155,367 -0.10 Ba7xe3 f2xe3 Ng6-h4 Qc1-d1 Nh4xf3+ Rf1xf3 Ng8-f6 Qd1-b3 Qd8-d7
7 00:00 7,168 155,821 -0.26 Ba7xe3 Qc1xe3
7 00:00 10,054 173,337 -0.29 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 e5xd4 c3xd4 Qd8-d7 Rf1-c1 Kh7-g8 e4-e5
7 00:00 10,345 159,147 -0.29 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 e5xd4 c3xd4 Qd8-d7 Rf1-c1 Kh7-g8 e4-e5
8 00:00 17,474 213,090 -0.23 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Nf6-d7 Ng3-h5 Nd7-f6 Nh5xf6+ Qd8xf6 d4xe5 Ng6xe5 Nf3xe5 Qf6xe5
8 00:00 17,964 216,423 -0.23 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Nf6-d7 Ng3-h5 Nd7-f6 Nh5xf6+ Qd8xf6 d4xe5 Ng6xe5 Nf3xe5 Qf6xe5
9 00:00 30,588 302,840 -0.25 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Nf6-d7 Ng3-h5 Kh7-g8 Rf1-d1 Nd7-f6 Nh5xf6+ Qd8xf6 Qe3-d3
9 00:00 31,862 309,326 -0.25 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Nf6-d7 Ng3-h5 Kh7-g8 Rf1-d1 Nd7-f6 Nh5xf6+ Qd8xf6 Qe3-d3
10 00:00 74,366 456,211 -0.30 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Kh7-g8 a4-a5 Qd8-f6 Qe3-d3 Ng6-h4 Nf3xh4 Qf6xh4 c3-c4
10 00:00 77,181 462,135 -0.30 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Kh7-g8 a4-a5 Qd8-f6 Qe3-d3 Ng6-h4 Nf3xh4 Qf6xh4 c3-c4
11 00:00 163,747 574,520 -0.28 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 d4xe5 Ng6xe5 Nf3xe5 d6xe5 b4-b5 Qd8-e7 Rf1-d1 Kh7-g8 f2-f3 Rf8-d8 Ng3-f1
11 00:00 171,125 576,147 -0.28 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 d4xe5 Ng6xe5 Nf3xe5 d6xe5 b4-b5 Qd8-e7 Rf1-d1 Kh7-g8 f2-f3 Rf8-d8 Ng3-f1
12 00:00 230,763 610,449 -0.27 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 d4xe5 Ng6xe5 Nf3xe5 d6xe5 b4-b5 Qd8-e7 Rf1-d1 Kh7-g8 f2-f3 b7-b6 Rd1-d2 Ra8-d8 Ra1-d1 Rd8xd2
12 00:00 239,587 611,158 -0.27 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 d4xe5 Ng6xe5 Nf3xe5 d6xe5 b4-b5 Qd8-e7 Rf1-d1 Kh7-g8 f2-f3 b7-b6 Rd1-d2 Ra8-d8 Ra1-d1 Rd8xd2
13 00:01 543,367 673,279 -0.28 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 d4xe5 d6xe5 b4-b5 Qd8-e7 c3-c4 b7-b6 Ra1-c1 Nf6-d7 Ng3-h5 Nd7-c5 Rf1-d1
13 00:01 559,069 672,729 -0.28 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 d4xe5 d6xe5 b4-b5 Qd8-e7 c3-c4 b7-b6 Ra1-c1 Nf6-d7 Ng3-h5 Nd7-c5 Rf1-d1
14 00:01 869,858 690,872 -0.20 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 d4xe5 d6xe5 b4-b5 Qd8-e7 c3-c4 Nf6-d7 Rf1-c1 Nd7-c5 Qe3-c3 Rf8-d8 Rc1-d1 Rd8xd1+ Ra1xd1 Nc5xa4
14 00:01 899,287 692,253 -0.20 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 d4xe5 d6xe5 b4-b5 Qd8-e7 c3-c4 Nf6-d7 Rf1-c1 Nd7-c5 Qe3-c3 Rf8-d8 Rc1-d1 Rd8xd1+ Ra1xd1 Nc5xa4
15 00:02 1,467,820 704,626 -0.23 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Qd8-e7 Ng3-e2 Nf6-d7 Ne2-c1 Kh7-g8 Nc1-d3 Ra8-d8 Ra1-a2 Qe7-f6 Qe3-e2 e5xd4 c3xd4 e6-e5
15 00:02 1,504,735 704,754 -0.23 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Qd8-e7 Ng3-e2 Nf6-d7 Ne2-c1 Kh7-g8 Nc1-d3 Ra8-d8 Ra1-a2 Qe7-f6 Qe3-e2 e5xd4 c3xd4 e6-e5
16 00:03 2,247,725 714,203 -0.20 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Qd8-e7 Ng3-e2 Ra8-d8 Nf3-d2 Kh7-g8 Nd2-c4 b7-b6 Qe3-g3 Qe7-f7 d4xe5 Nf6xe4 Qg3-e3
16 00:03 2,311,934 714,843 -0.20 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Qd8-e7 Ng3-e2 Ra8-d8 Nf3-d2 Kh7-g8 Nd2-c4 b7-b6 Qe3-g3 Qe7-f7 d4xe5 Nf6xe4 Qg3-e3
17 00:06 4,277,224 722,096 -0.23 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Qd8-e7 Ng3-e2 Nf6-d7 Ne2-c1 Kh7-g8 Nc1-d3 Ra8-d8 Ra1-a2 Ng6-h4 Nf3xh4 Qe7xh4 f2-f3 Qh4-f6 Qe3-f2 e5xd4 c3xd4
17 00:06 4,430,214 722,904 -0.23 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Qd8-e7 Ng3-e2 Nf6-d7 Ne2-c1 Kh7-g8 Nc1-d3 Ra8-d8 Ra1-a2 Ng6-h4 Nf3xh4 Qe7xh4 f2-f3 Qh4-f6 Qe3-f2 e5xd4 c3xd4
18 00:11 8,457,646 722,217 -0.18 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Qd8-e7 Ng3-e2 Nf6-d7 Ne2-c1 Ng6-f4 Nc1-d3 Ra8-d8 Rf1-e1 Nd7-b6 Nd3xf4 e5xf4 Qe3-e2 e6-e5 Qe2-a2 Qe7-f6
18 00:12 8,651,915 724,210 -0.18 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Qd8-e7 Ng3-e2 Nf6-d7 Ne2-c1 Ng6-f4 Nc1-d3 Ra8-d8 Rf1-e1 Nd7-b6 Nd3xf4 e5xf4 Qe3-e2 e6-e5 Qe2-a2 Qe7-f6
19 00:27 19,556,559 724,570 -0.15 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Nf6-d7 Rf1-d1 Qd8-e7 Ng3-e2 Qe7-f6 Rd1-d3 Kh7-g8 Ra1-d1 Ra8-d8 Rd3-d2 Nd7-b6 d4xe5 Ng6xe5 Nf3xe5 Qf6xe5 Rd2-d4 Nb6-d7 f2-f4
19 00:27 19,883,054 725,749 -0.15 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Nf6-d7 Rf1-d1 Qd8-e7 Ng3-e2 Qe7-f6 Rd1-d3 Kh7-g8 Ra1-d1 Ra8-d8 Rd3-d2 Nd7-b6 d4xe5 Ng6xe5 Nf3xe5 Qf6xe5 Rd2-d4 Nb6-d7 f2-f4
20 00:38 28,031,268 725,893 -0.15 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Nf6-d7 Rf1-d1 Qd8-e7 Ng3-e2 Qe7-f6 Rd1-d3 Kh7-g8 Ra1-d1 Ra8-d8 Rd3-d2 Nd7-b6 d4xe5 Ng6xe5 Nf3xe5 Qf6xe5 Rd2-d4 Nb6-d7 f2-f4
20 00:39 28,397,201 727,140 -0.15 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 a6-a5 b4-b5 Nf6-d7 Rf1-d1 Qd8-e7 Ng3-e2 Qe7-f6 Rd1-d3 Kh7-g8 Ra1-d1 Ra8-d8 Rd3-d2 Nd7-b6 d4xe5 Ng6xe5 Nf3xe5 Qf6xe5 Rd2-d4 Nb6-d7 f2-f4
21 02:19 101,519,850 726,709 -0.12 Ba7xe3 Qc1xe3 a6-a5 b4-b5 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Qd8-f6 Nf3-d2 Nd7-b6 Qe3-d3 Kh7-g8 Nd2-c4 Nb6xc4 Qd3xc4 Ra8-c8 d4-d5 Rf8-e8 Ra1-d1 Qf6-f7 f2-f3 Ng6-h4 d5xe6 Qf7-g6
21 02:21 102,526,751 727,599 -0.12 Ba7xe3 Qc1xe3 a6-a5 b4-b5 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Qd8-f6 Nf3-d2 Nd7-b6 Qe3-d3 Kh7-g8 Nd2-c4 Nb6xc4 Qd3xc4 Ra8-c8 d4-d5 Rf8-e8 Ra1-d1 Qf6-f7 f2-f3 Ng6-h4 d5xe6 Qf7-g6
22 02:28 108,149,665 729,053 -0.13 Ba7xe3 Qc1xe3 a6-a5 b4-b5 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Qd8-f6 Nf3-d2 Kh7-g8 Qe3-d3 Ng6-h4 Qd3-g3 Nh4-g6 Qg3-d3
22 02:30 109,796,064 730,126 -0.13 Ba7xe3 Qc1xe3 a6-a5 b4-b5 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Qd8-f6 Nf3-d2 Kh7-g8 Qe3-d3 Ng6-h4 Qd3-g3 Nh4-g6 Qg3-d3
23 02:44 120,105,527 731,777 -0.13 Ba7xe3 Qc1xe3 a6-a5 b4-b5 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Qd8-f6 Nf3-d2 Kh7-g8 Qe3-d3 Ng6-h4 Qd3-g3 Nh4-g6 Qg3-d3
23 02:47 122,577,569 733,165 -0.13 Ba7xe3 Qc1xe3 a6-a5 b4-b5 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Qd8-f6 Nf3-d2 Kh7-g8 Qe3-d3 Ng6-h4 Qd3-g3 Nh4-g6 Qg3-d3
24 03:50 169,292,445 734,205 -0.20 Ba7xe3 Qc1xe3 a6-a5 b4-b5 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Qd8-f6 Nf3-d2 Kh7-g8 g2-g3 Ra8-d8 d4xe5 d6xe5 Ne2-c1 Ng6-h8 Nc1-d3 Nh8-f7 Rf1-d1 Nf7-d6 Qe3-e2 Nd7-b6 Nd3-c5 Nb6-d7 Nc5xd7 Rd8xd7 Nd2-c4 Rd7-f7
24 04:01 177,608,574 737,528 -0.20 Ba7xe3 Qc1xe3 a6-a5 b4-b5 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Qd8-f6 Nf3-d2 Kh7-g8 g2-g3 Ra8-d8 d4xe5 d6xe5 Ne2-c1 Ng6-h8 Nc1-d3 Nh8-f7 Rf1-d1 Nf7-d6 Qe3-e2 Nd7-b6 Nd3-c5 Nb6-d7 Nc5xd7 Rd8xd7 Nd2-c4 Rd7-f7
25 16:53 749,297,558 739,354 -0.24 Ba7xe3 Qc1xe3 a6-a5 b4-b5 Ng8-f6 Ng3-e2 Kh7-g8 d3-d4 Nf6-d7 g2-g3 Qd8-f6 Nf3-d2 Ra8-e8 Nd2-c4 b7-b6 Nc4-d2 Re8-d8 Ra1-d1 Qf6-e7 f2-f3 Qe7-f7 Nd2-c4 Ng6-e7 d4xe5 Nd7xe5 Nc4xe5 d6xe5 f3-f4 Qf7-h5
25 17:19 769,617,803 740,530 -0.24 Ba7xe3 Qc1xe3 a6-a5 b4-b5 Ng8-f6 Ng3-e2 Kh7-g8 d3-d4 Nf6-d7 g2-g3 Qd8-f6 Nf3-d2 Ra8-e8 Nd2-c4 b7-b6 Nc4-d2 Re8-d8 Ra1-d1 Qf6-e7 f2-f3 Qe7-f7 Nd2-c4 Ng6-e7 d4xe5 Nd7xe5 Nc4xe5 d6xe5 f3-f4 Qf7-h5

Stockfish 2.3.1 on 4 cpus did.

FEN: r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 6 16

Stockfish-231-64-popcnt-ja:
1/1 00:00 246 246,000 -1.29 Kh7-h8 Be3xa7 Ra8xa7 Qc1-e3
2/2 00:00 579 579,000 -1.05 Ng6-h4 Nf3xh4 Ba7xe3 Qc1xe3 Qd8xh4 Rf1-b1
3/3 00:00 825 412,500 -1.05 Ng6-h4 Nf3xh4 Ba7xe3 Qc1xe3 Qd8xh4 Rf1-b1
4/4 00:00 1,166 583,000 -1.05 Ng6-h4 Nf3xh4 Ba7xe3 Qc1xe3 Qd8xh4 Rf1-b1
5/6 00:00 2,356 785,333 -1.29 Rf8xf3 g2xf3 Qd8-h4 d3-d4 Qh4xh3
6/6 00:00 3,875 775,000 -1.01 Ba7xe3 Qc1xe3 Ng6-h4 Nf3xh4 Qd8xh4 Rf1-b1
7/10 00:00 6,278 784,750 -0.56 Ba7xe3 Qc1xe3 Ng6-h4 Nf3xh4 Qd8xh4 Rf1-b1 Ng8-e7 b4-b5
8/12 00:00 13,216 826,000 -0.52 Ba7xe3 Qc1xe3 Ng8-f6 Rf1-d1 Kh7-g8 d3-d4 e5xd4 c3xd4 Qd8-d7
9/13 00:00 27,496 982,000 -0.28 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Kh7-g8 Ra1-d1 Nf6-d7 d4-d5 e6xd5 Rd1xd5
10/14 00:00 45,073 1,126,825 -0.32 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Kh7-g8 Ra1-a2 Qd8-d7 Rf1-b1 Rf8-d8 Rb1-d1 Qd7-c6 d4xe5 Ng6xe5 Nf3xe5 d6xe5
11/17 00:00 85,373 1,237,289 -0.16 Ba7xe3 Qc1xe3 Ng6-h4 Nf3xh4 Qd8xh4 b4-b5 a6xb5 a4xb5 Qh4-f4 Qe3xf4 e5xf4 Ng3-e2 e6-e5 Kg1-h2 Ra8xa1 Rf1xa1 f4-f3
12/18 00:00 106,846 1,287,301 -0.28 Ba7xe3 Qc1xe3 Ng6-h4 Nf3-d2 Qd8-f6 d3-d4 g7-g5 d4xe5 Qf6xe5 Nd2-c4 Qe5-f4 Ng3-e2 Qf4xe3 f2xe3
13/19 00:00 272,271 1,670,374 -0.40 Ba7xe3 Qc1xe3 Ng6-h4 Nf3-d2 Ng8-e7 Ng3-e2 Kh7-g8 Qe3-g3 Ne7-g6 Qg3-g4 Qd8-g5 Qg4xg5 h6xg5 Nd2-c4
14/20 00:00 327,331 1,722,794 -0.36 Ba7xe3 Qc1xe3 Ng6-h4 Nf3-d2 Ng8-e7 Ng3-e2 Kh7-g8 Qe3-g3 Ne7-g6 Qg3-g4 Qd8-g5 Qg4xg5 h6xg5 Nd2-c4 b7-b5
15/22 00:00 662,946 2,071,706 -0.36 Ba7xe3 Qc1xe3 Ng6-h4 Nf3-d2 Ng8-e7 Ng3-e2 Kh7-g8 f2-f4 e5xf4 Ne2xf4 e6-e5 Nf4-e6 Rf8xf1+ Ra1xf1 Qd8-d7 Qe3-g3 Qd7xe6 Qg3xh4
16/22 00:00 724,538 2,094,040 -0.36 Ba7xe3 Qc1xe3 Ng6-h4 Nf3-d2 Ng8-e7 Ng3-e2 Kh7-g8 f2-f4 e5xf4 Ne2xf4 e6-e5 Nf4-e6 Rf8xf1+ Ra1xf1 Qd8-d7 Qe3-g3 Qd7xe6 Qg3xh4
17/22 00:00 1,501,595 2,313,705 -0.28 Ba7xe3 Qc1xe3 Ng6-h4 Nf3-d2 Qd8-f6 Ng3-e2 g7-g5 d3-d4 Nh4-g6 Nd2-f3 Ng8-e7 Rf1-c1 Ne7-c6 b4-b5 a6xb5 a4xb5 e5xd4 c3xd4 Ra8xa1 Rc1xa1
18/22 00:01 2,317,149 2,324,121 -0.28 Ba7xe3 Qc1xe3 Ng6-h4 Nf3-d2 Qd8-f6 Ng3-e2 g7-g5 d3-d4 Nh4-g6 Nd2-f3 Ng8-e7 Rf1-c1 Ne7-c6 b4-b5 a6xb5 a4xb5 e5xd4 c3xd4 Ra8xa1 Rc1xa1 Nc6-e7
19/27 00:02 5,563,075 2,557,735 -0.32 Ba7xe3 Qc1xe3 Ng6-h4 Nf3-d2 Ng8-e7 Ng3-e2 Nh4-g6 Rf1-b1 Qd8-d7 d3-d4 Kh7-h8 Nd2-f3 e5xd4 c3xd4 e6-e5 Ra1-a3 e5xd4 Ne2xd4 Ng6-e5 Nf3xe5 d6xe5 Nd4-f3
20/28+ 00:03 9,769,763 2,623,459 -0.24 Ba7xe3 Qc1xe3 Ng8-e7 Ng3-e2 Kh7-g8 Rf1-b1 Ne7-c6 b4-b5 Nc6-a5 Ra1-a2 Qd8-f6 Ne2-g3 Ng6-h4 Nf3xh4 Qf6xh4
20/28 00:04 11,632,097 2,609,849 -0.20 Ba7xe3 Qc1xe3 Ng8-e7 d3-d4 e5xd4 c3xd4 Ng6-f4 Qe3-c3 Kh7-g8 Rf1-c1 d6-d5 Nf3-e5 d5xe4 Qc3-d2 Ne7-d5 Ng3xe4 Qd8-h4 Rc1-e1 Ra8-d8 Ra1-c1
21/29+ 00:09 26,833,340 2,699,259 -0.12 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Nf6-d7 d4xe5 Nd7xe5 Nf3xe5 Ng6xe5 f2-f4 Ne5-c4 Qe3-d4 b7-b5 a4xb5 a6xb5 f4-f5 Ra8xa1 Rf1xa1 e6-e5 Qd4-d1 Qd8-g5
21/31 00:12 30,708,705 2,552,040 -0.12 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Kh7-g8 Nf3-d2 Qd8-e8 d4xe5 Ng6xe5 f2-f4 Ne5-c6 Ne2-d4 Nd7-f6 Qe3-e2 Qe8-d7 f4-f5 e6xf5 e4xf5 Nc6xd4 c3xd4
22/32- 00:13 33,169,049 2,470,876 -0.20 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Kh7-g8 a4-a5 Qd8-f6 d4xe5 Ng6xe5 Nf3xe5 Nd7xe5 f2-f4 Ne5-c6 Ne2-d4 Nc6xd4 c3xd4 Qf6-h4 Ra1-c1
22/32 00:13 33,729,918 2,452,193 -0.16 Ba7xe3 Qc1xe3 Ng8-f6 d3-d4 Nf6-d7 Ng3-e2 Kh7-g8 a4-a5 Qd8-f6 d4xe5 Ng6xe5 Nf3xe5 Nd7xe5 f2-f4 Ne5-c6 Ne2-d4 Nc6xd4 c3xd4 Qf6-h4 Qe3-f2 Qh4xf2+ Rf1xf2 Kg8-f7 Ra1-c1 c7-c6 f4-f5 Kf7-e7
23/32- 00:18 43,937,773 2,375,143 -0.24 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Kh7-g8 d3-d4 e5xd4 c3xd4 Qd8-d7 Ra1-c1 e6-e5 Qe3-d3
23/32 00:19 47,869,491 2,399,834 -0.16 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Kh7-g8 d3-d4 Nf6-d7 Ng3-e2 Qd8-f6 d4xe5 Ng6xe5 Nf3xe5 Nd7xe5 f2-f4 Ne5-c6 Ne2-d4 Nc6xd4 c3xd4 Qf6-g6 Rf1-c1 Rf8-f7 g2-g4 Ra8-f8 f4-f5 e6xf5 e4xf5 Rf7xf5 Rc1xc7
24/32- 00:22 55,946,605 2,453,798 -0.24 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Kh7-g8 d3-d4 Nf6-d7 Rf1-b1 c7-c6 Rb1-d1 Ng6-h4 Nf3-h2 e5xd4 Qe3xd4 d6-d5 e4xd5 e6xd5 Nh2-g4
24/34 00:25 63,856,648 2,476,311 -0.20 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Kh7-g8 d3-d4 Nf6-d7 Rf1-b1 c7-c6 Rb1-d1 Qd8-f6 Ra1-a2 e5xd4 Qe3xd4 d6-d5 Qd4xf6 Nd7xf6 Rd1-e1 Rf8-e8 Ra2-d2 Kg8-f7 Rd2-d1 Ng6-f4 Nf3-e5+ Kf7-e7 c3-c4 Re8-c8
25/40+ 00:33 81,868,316 2,449,313 -0.12 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Kh7-g8 d3-d4 Nf6-d7 Rf1-b1 c7-c6 Rb1-d1 Qd8-f6 Ra1-a2 e5xd4 Qe3xd4 Qf6xd4 Nf3xd4 Ra8-e8 f2-f3 Nd7-e5
25/40 00:34 84,159,672 2,416,437 -0.12 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Kh7-g8 d3-d4 Nf6-d7 Rf1-b1 c7-c6 Rb1-d1 Qd8-f6 Ng3-h5 Qf6-e7 Qe3-e2 e5xd4 Rd1xd4 Nd7-e5 Nf3xe5 Ng6xe5 Ra1-d1 Ra8-d8 f2-f4 Ne5-g6 e4-e5 d6-d5 Qe2-g4
26/40- 00:39 93,649,271 2,363,627 -0.20 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Kh7-g8 d3-d4 Nf6-d7 Rf1-b1 c7-c6 Rb1-d1 Qd8-f6 Ng3-h5 Qf6-e7 Qe3-e2 e5xd4 Rd1xd4 Nd7-e5 Nf3xe5 Ng6xe5 Ra1-d1 Ra8-d8 f2-f4 Ne5-g6 e4-e5 d6-d5 Qe2-g4
26/40- 00:52 128,928,433 2,458,073 -0.28 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Kh7-g8 d3-d4 e5xd4 c3xd4 Qd8-d7 Ra1-c1 e6-e5 Rf1-d1
26/40 01:02 148,792,296 2,366,628 -0.20 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Kh7-g8 d3-d4 e5xd4 c3xd4 Rf8-f7 Ra1-c1 Qd8-e8 Rc1-c3 Qe8-a4 Rf1-c1 Ra8-c8 Rc3-b3 Rc8-e8 Rb3-b1 Qa4-d7 Rb1-b2 Qd7-b5 Qe3-d2 Nf6-h5 Qd2-e2 Qb5xe2 Ng3xe2 Nh5-f4 Ne2xf4 Ng6xf4
27/40+ 01:35 229,657,654 2,415,262 -0.12 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Nf6-d7 Rf1-b1 Ng6-h4 Nf3xh4 Qd8xh4 d3-d4 Kh7-h8 b4-b5 a6xb5 Rb1xb5 Ra8-b8 Ra1-b1
27/40 01:46 258,404,358 2,421,715 -0.24 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Nf6-d7 Rf1-b1 Ng6-h4 Nf3xh4 Qd8xh4 Ng3-f1 Rf8-f7 Qe3-g3 Qh4-f4 Qg3xf4 e5xf4 d3-d4 Rf7-f8 b4-b5 Nd7-f6 Nf1-d2 a6xb5 Rb1xb5 Rf8-b8 Ra1-b1 c7-c6 Rb5xb7 Rb8xb7 Rb1xb7 Ra8xa5
28/40+ 01:59 288,722,157 2,423,202 -0.16 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Nf6-d7 Rf1-b1 Ng6-h4 Nf3xh4 Qd8xh4 Ng3-f1 Qh4-f4 Qe3-e2 Qf4-f7 Nf1-e3 g7-g6 Qe2-a2 Nd7-f6 b4-b5 a6xb5 Rb1xb5 Nf6-d7 Rb5xb7 Nd7-c5
28/40 02:05 306,609,169 2,442,575 -0.16 Ba7xe3 Qc1xe3 Ng8-f6 a4-a5 Nf6-d7 Rf1-b1 Ng6-h4 Nf3xh4 Qd8xh4 Ng3-f1 Qh4-f4 Qe3-e2 Qf4-f7 Nf1-e3 g7-g6 Ne3-c4 Kh7-g7 b4-b5 a6xb5 Rb1xb5 b7-b6 Qe2-e3 Qf7-f4 a5-a6 Qf4xe3 Nc4xe3 Nd7-c5 a6-a7 Nc5xd3 f2-f3 Nd3-c5
29/40+ 02:47 413,657,530 2,464,315 -0.08 Rf8xf3 g2xf3 Qd8-h4 Kg1-h2 Ra8-f8 b4-b5 Ng6-f4 Be3xf4 Rf8xf4 b5xa6 b7xa6 Qc1-d1 Ng8-e7 Ra1-b1 Ne7-g6 Qd1-e2 Rf4-f8 Rf1-d1 Ng6-f4 Qe2-f1 Nf4-g6 d3-d4 Rf8xf3 Rd1-d3 Rf3xd3 Qf1xd3 Ng6-f4
29/40+ 02:59 440,624,231 2,454,826 0.00 Rf8xf3 g2xf3 Qd8-h4 Kg1-g2 Ng8-e7 d3-d4 Ra8-f8 a4-a5 Qh4-f6
29/40 03:25 508,143,205 2,469,615 0.00 Rf8xf3 g2xf3 Qd8-h4 Kg1-h2 Ra8-f8 Qc1-b2 Ng6-f4 Be3xf4 Rf8xf4 b4-b5 Ng8-e7 b5xa6 b7xa6 Qb2-e2 Ne7-g6 Ra1-a2 Qh4xh3+ Kh2xh3 Rf4-h4+ Kh3-g2 Ng6-f4+ Kg2-g1 Nf4-h3+ Kg1-g2 Nh3-f4+
30/40+ 03:59 598,332,882 2,499,448 +0.08 Rf8xf3 g2xf3 Qd8-h4 Kg1-h2 Ra8-f8 Qc1-b2 Ng6-f4 Be3xf4 Rf8xf4 b4-b5 Ng8-e7 b5xa6 b7xa6 Qb2-e2 Ne7-g6 Ra1-a2 Rf4-f6 Rf1-b1 Ng6-f4 Qe2-f1 Rf6-g6 d3-d4 e5xd4 Rb1-b7 Ba7-c5 c3xd4 Bc5xd4 Rb7xc7 Bd4xf2 Ra2xf2 Rg6xg3
30/40+ 04:26 665,186,224 2,498,427 +0.16 Rf8xf3 g2xf3 Qd8-h4 Kg1-g2 Ng8-e7 d3-d4 Ra8-f8 Ra1-b1 Qh4-f6 Qc1-d1 e5xd4 c3xd4 Ng6-h4+ Kg2-h1 Nh4xf3 Ng3-f5 e6xf5 Qd1xf3 Ba7xd4 Be3xd4 Qf6xd4 e4xf5 c7-c6
30/42+ 05:15 793,009,582 2,513,732 +0.28 Rf8xf3 g2xf3 Qd8-h4 Kg1-h2 Ra8-f8 Qc1-b2 Ng6-f4
30/55+ 09:05 1,384,607,111 2,537,430 +0.46 Rf8xf3 g2xf3 Qd8-h4 Kg1-g2 Ng8-e7 Kg2-h2 Ra8-f8 Rf1-h1 Ba7xe3 Qc1xe3 d6-d5 Ng3-e2 d5-d4 c3xd4 e5xd4 Ne2xd4 Ng6-f4

[Robert Flesher]

No problem for Vitrivius 1.15Beta7



New game
r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 0 1

Analysis by Vitruvius 1.15b7:

16...Rxf3 17.gxf3 Qh4 18.Kh2 Rf8 19.b5 a5 20.Qd2 N8e7 21.Qa2 d5 22.Qe2 Nf4 23.Bxf4 Qxf4 24.c4 Qxf3 25.cxd5 exd5 26.Ra2 dxe4 27.Qxe4+ Ng6 28.Rc2 Bb6 29.Ne2 Rf7 30.Ng3 Rf8
= (-0.15 ++) Depth: 23 00:01:10 111mN
(Doe, 22.10.2012)

[WuShock]

Houdini 3 Pro x64 , 4 threads , i7 / 940 @ 2.93

This is in regular mode , not tactical .


[/img]

[Dschmitt]

Had a little more time tonight. Critter 1.6a and Houdini 1.5ax64 both in 4 cpu found it nearly instantly. Below is a sample of the output. Spike 1.4 and fritz 13 went down the BxB line.

Critter 1.6a

Analysis by Critter 1.6a 64-bit:

16...Rf8xf3 17.g2xf3 Qd8-h4 18.Kg1-h2 Ra8-f8 19.Qc1-d2 Ng8-e7 20.Qd2-a2 d6-d5 21.Ra1-e1 Rf8-f6 22.b4-b5 d5-d4 23.c3xd4 e5xd4 24.f3-f4 d4xe3 25.f2xe3 a6xb5 26.a4xb5 Ba7-b6 27.e4-e5 Ng6xf4 28.Rf1xf4 Rf6xf4 29.e3xf4 Ne7-g6 30.Qa2-e2 Qh4xf4 31.Qe2-g2 Qf4-d4 32.Re1-f1 Qd4xd3 33.Qg2xb7 Qd3xb5 34.Qb7-e4 Qb5xe5 35.Qe4xe5 Ng6xe5 36.Kh2-g2 Ne5-c4 37.Rf1-f7 Kh7-g6 38.Rf7-d7 Nc4-e5 39.Rd7-e7
= (-0.25) Depth: 25/61 00:13:05 2699mN

Houdini 1.5a x 64

Analysis by Houdini 1.5a x64:

16...Rf8xf3 17.g2xf3 Qd8-h4 18.Kg1-h2 Ra8-f8 19.b4-b5 Ng8-e7 20.b5xa6 b7xa6 21.Ra1-b1 Ng6-f4 22.Be3xf4 e5xf4 23.Qc1-c2 f4xg3+ 24.f2xg3 Qh4-g5 25.f3-f4 Qg5-c5 26.d3-d4 Qc5-c4 27.Rf1-d1 Kh7-g8 28.Qc2-d3 Qc4xd3 29.Rd1xd3 Ba7-b6 30.Kh2-g2 Kg8-f7 31.Rd3-d2 d6-d5 32.Rd2-e2 d5xe4 33.Re2xe4 Ne7-d5 34.Rb1-e1 Nd5xc3 35.Re4xe6 Bb6xd4 36.Re6xa6
= (-0.18) Depth: 27/74 00:09:43 2431mN

[Master Om]

From my game on company's championship.
[D]r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 6 16

Some engines see it immediately other need a few seconds.

These are the engines I found.

New game
[d]r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 0 1

Analysis by Houdini 3 Pro x64:

16...Rxf3 17.gxf3 Qh4 18.Kh2 Rf8 19.Qe1 Nf4 20.Bxf4 Qxf4 21.Rd1 Ne7 22.d4 exd4 23.cxd4 Nc6 24.Qe3 Qh4 25.Qc3 e5 26.d5 Nd4 27.Rd3 Qf4 28.Kg2 Rf7 29.a5 g6 30.Rg1 Qh4 31.Rc1 Kg7 32.Qd2 c6 33.dxc6 bxc6
= (-0.11) Depth: 23/57 00:00:27 192mN
(Prakash, Bhubaneswar 23.10.2012)


New game
[d]r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 0 1

Analysis by Critter 1.6a 64-bit:

16...Rxf3 17.gxf3 Qf6 18.Qd1 N8e7 19.Kh2 Nf4 20.Rg1 Neg6 21.Ne2 Nh5 22.d4 Nh4 23.Rg4 Nxf3+ 24.Kh1 Rf8 25.dxe5 Qxe5 26.Bxa7 Qh2#
= (-0.02 ++) Depth: 19/52 00:00:14 133mN
(Prakash, Bhubaneswar 23.10.2012)


New game
[d]r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 0 1

Analysis by Naum 4.2 x64:

16...Rxf3 17.gxf3 Qh4 18.Kh2 Rf8 19.Qe1 Nf4 20.Bxf4 exf4 21.Ne2 e5 22.d4 Qh5 23.dxe5 dxe5 24.Rd1 Qxf3
= (0.21) Depth: 17/32 00:00:02 18995kN
(Prakash, Bhubaneswar 23.10.2012)


New game
[d]r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 0 1

Analysis by Rybka 3 Dynamic:

16...Rxf3 17.gxf3[] Qh4 18.Kh2 Rf8 19.Qd2 N8e7 20.Qa2 Rf6 21.Qc4 c6 22.d4 d5
= (-0.16) Depth: 13 00:00:03 652kN
(Prakash, Bhubaneswar 23.10.2012)

New game
[d]r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 0 1

Analysis by Spark-1.0-win64-mp-corei 1000:

16...Rxf3 17.gxf3
-+ (-2.48 ++) Depth: 19/35 00:00:05 71032kN
(Prakash, Bhubaneswar 23.10.2012)

[Dan Astrachan]

[D]r2q1rn1/bpp3pk/p2pp1np/4p3/PP2P3/2PPBNNP/5PP1/R1Q2RK1 b - - 6 16

Ivanhoe 9.46h x64 4-Gb hash

Code: Select all

 23	00:48	 481 848 849	10 197 000	-0,11	16. ... Bxe3 17.Qxe3 a5 18.b5 Nf6 19.Rfd1 Kg8 20.d4 Nd7 21.Nh5 Nh4 22.Nd2 Qe7 23.Nc4 Qf7 24.Ng3 Qf6 25.Ra2 Kh7 26.Re2 Kg8 27.f3 Qg6 28.Qf2 exd4 29.cxd4
  23+	01:11	 718 253 752	10 208 000	-0,03	16. ... Rxf3
(...)
 30	41:56	26 318 607 606	10 464 000	+0,30	16. ... Rxf3 17.gxf3 Qh4 18.Kh2 Rf8 19.b5 N8e7 20.bxa6 bxa6 21.Ra2 Nf4 22.Bxf4 exf4 23.d4 fxg3+ 24.fxg3 Qh5 25.Qb2 Qa5 26.f4 Rb8 27.Qc2 Kg8 28.Raa1 Rb6 29.Rfc1 c5 30.dxc5 Qxc5 31.Rcb1 Rxb1 32.Rxb1 Qc6 33.a5 

[ZirconiumX]

Code: Select all

Engine: IvanHoe 9.46b
Core0 : GenuineIntel Pentium(R) Dual-Core  CPU      E5700  @ 3.00GHz
Core1 : GenuineIntel Pentium(R) Dual-Core  CPU      E5700  @ 3.00GHz
Core2 : GenuineIntel Pentium(R) Dual-Core  CPU      E5700  @ 3.00GHz
Core3 : GenuineIntel Pentium(R) Dual-Core  CPU      E5700  @ 3.00GHz
Score : +0.06
Depth : 22/1
Time  : 00:00:13
Nodes : 26296961
N/sec : 1999768
1... Rxf3 2. gxf3 Qh4 3. Kh2 Rf8 4. b5 Nf4 5. Bxf4 Rxf4 6. Qc2 Ne7 7. Qe2 Ng6 8. Rfd1 Rf8 9. d4 a5 10. Rac1 Qg5 11. Qe3 Nf4 12. Qe1 g6 13. Qf1 Kg7 14. Kg1

Matthew:out