With build 103 the solution takes more than ten minutes, getting higher plydepths though than later versions because of less extensions. ..I did however not expect so much difference in time to plydepths
.. 3.Ne5 is eventually found:r1r3k1/1Q1n2pp/p3pp2/3p4/3P1B2/q1pBPN1P/5PP1/2R3K1 w - -
Engine: Blueberry Beta 4 DM70 Build 103 (256 MB)
by F. Letouzey, T. Gaksch, E. de Groot
8/28 0:00 +1.38 1.e4 dxe4 2.Qxe4 Nf8 3.d5 g5 4.Be3 f5
5.Qe5 (180.620)
9/32 0:00 +1.42 1.e4 dxe4 2.Qxe4 Nf8 3.d5 f5 4.Qe5 Rc5
5.Qd6 Re8 (365.251)
10/47 0:07 +1.25 1.e4 dxe4 2.Qxe4 Nf8 3.d5 e5 4.Be3 Qd6
5.Rb1 Rc7 6.h4 (3.328.456) 454
11/47 0:11 +1.20 1.e4 Nf8 2.exd5 Qb2 3.Qxb2 cxb2
4.Rb1 exd5 5.Rxb2 a5 6.Ra2 g5 7.Bd2 a4
8.Bf5 Rc7 9.Ra3 (5.301.431) 470
12/47 0:17 +1.80 1.e4 Nf8 2.exd5 Qb2 3.Bxa6 Kh8 4.d6 Rcb8
5.Qc6 g5 6.Nxg5 fxg5 7.Bxg5 Qb6
8.Qc7 Qxd4 9.Rxc3 Rb1+ 10.Bf1 (8.598.486) 484
13/47 0:27 +1.57 1.e4 Nf8 2.exd5 Qb2 3.Bxa6 Kh8 4.d6 Rcb8
5.Qc6 g5 6.Nxg5 fxg5 7.Bxg5 Qb6
8.Qxb6 Rxb6 9.Bd3 Ra5 10.Bf6+ Kg8
11.Rxc3 Ra1+ 12.Kh2 Rxd6 (13.404.441) 494
14/52 0:57 +1.73 1.e4 Nf8 2.exd5 Qb2 3.Bxa6 Qa3 4.Bd3 Qb2
5.Qe7 exd5 6.Bf5 Ra2 7.Be3 Qb8
8.Bxc8 Qxc8 9.Qb4 c2 10.Bf4 (29.071.266) 509
15/52 1:46 +1.60 1.e4 Nf8 2.exd5 Qb2 3.Bxa6 Qa3 4.Bd3 Qb2
5.Qe7 exd5 6.Bf5 Rc6 7.Rb1 Qa3 8.Qb7 Qa6
9.Qb4 Qa3 (54.078.796) 509
16/52 3:15 +1.62 1.e4 Nf8 2.exd5 Qb2 3.Bxa6 Qa3 4.Bd3 Qb2
5.Qe7 exd5 6.Bf5 Rc6 7.Ne1 g5 8.Be3 Qa3
9.Qb7 Qa6 10.Qe7 (99.179.625) 507
17/53 8:21 +1.93 1.e4 dxe4 2.Bxe4 Nf8 3.Rc2 Ng6 4.Bc1 Qa1
5.Qb6 Rab8 6.Qxe6+ Kh8 7.Bxg6 hxg6
8.Nh4 Kh7 9.Qg4 Re8 10.Qxg6+ Kg8
11.Nf5 Re1+ 12.Kh2 (250.306.306) 498
17/63 10:48 +2.31 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Rad8 6.Qc6 Qb2 7.Bc7 Rde8
8.Kg3 Re7 9.d5 Rff7 10.Bd6 Rb7
11.Kh2 Kg7 (322.975.605) 497
18/63 12:21 +2.93 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Qa3 6.Ng5 Qe7 7.Bd6 Qd7
8.Ne4 Rfd8 9.Qb3 Rac8 10.Bc5 f5
11.Nf6 Qg7 (367.402.582) 495
19/63 13:31 +2.90 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Qa3 6.Ng5 Qe7 7.Ne4 Rad8
8.Qb3 a5 9.Bh6 a4 10.Qxa4 Ra8 11.Qb3 Rfc8
12.Nc5 g5 13.Qxc3 Ra2 14.Kg1 (398.743.409) 491
20/63 16:31 +2.96 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Qa3 6.Ng5 Qe7 7.Ne4 Rad8
8.Qb3 a5 9.h4 Rc8 10.Qc2 Qd7 11.Nc5 Qg4
12.Qxc3 Qxh4+ 13.Kg1 g5 14.Bd6 (483.625.046) 487
21/63 22:04 +3.04 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Qa3 6.Ng5 Qe7 7.Ne4 a5
8.Nxc3 a4 9.Bd6 Qf7 10.Qxf7 Rxf7
11.Be4 Ra6 12.Ba3 Rc7 13.Nb5 Rd7
14.d5 (642.799.332) 485
22/63 32:15 +2.82 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Qa3 6.Ng5 Qe7 7.Ne4 a5
8.Nxc3 a4 9.Bd6 Qf7 10.Qxf7 Rxf7
11.Be4 Ra6 12.Ba3 Rc7 13.Nb5 Rd7
14.g4 (924.874.184) 477
23/63 51:08 +3.02 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Qa3 6.Ng5 Qe7 7.Ne4 a5
8.Bd6 Qf7 9.Nxc3 a4 10.Qxf7 Rxf7
11.Be4 Ra6 12.Ba3 f5 13.Bd3 Ra5
14.Bb5 (1.463.944.839) 477
24/67 91:43 +3.63 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5
4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3
7.Qxd3 Rac8 8.Qc2 a5 9.e4 a4 10.exd5 a3
11.d6 Ra8 12.d5 a2 13.Bxc3 a1Q
14.Bxa1 (2.631.105.819) 478
25/67 118:12 +3.70 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5
4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3
7.Qxd3 Rac8 8.Qc2 a5 9.e4 a4 10.exd5 a3
11.d6 Ra8 12.d5 a2 13.Bxc3 a1Q
14.Bxa1 (3.401.745.235) 479
26/69 173:46 +3.76 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5
4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3
7.Qxd3 Rac8 8.Qc2 a5 9.e4 a4 10.exd5 a3
11.h4 Rgf8 12.h5 Rf7 13.d6 Kg8 14.h6 (5.021.613.007) 481
27/73 364:50 +3.97 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 fxe5
4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3
7.Qxd3 Rac8 8.Qc2 a5 9.e4 a4 10.Bd6 dxe4
11.Bc5 Rgd8 12.Qxc3 Ra8 13.Qe3 h6
14.Ba3 (10.524.127.385) 480
best move: Qb7xd7 time: 369:36.281 min n/s: 481.248 CPU 100.0% n/s(1CPU): 481.248 nodes: 10.672.190.000
But I'm not unhappy with the latest build 194 that again has undergone some eval changes not related to this position, but to solve Dann's silent_but_deadly No.15 (*)
[d]r1r3k1/1Q1n2pp/p3pp2/3p4/3P1B2/q1pBPN1P/5PP1/2R3K1 w - -
Engine: Blueberry Beta 4 DM70 Build 194 (256 MB)
by F. Letouzey, T. Gaksch, E. de Groot
1/09 0:00 -2.05 1.Qxd7 Qxc1+ 2.Kh2 (66)
1/09 0:00 -0.59 1.Rb1 (277)
1/09 0:00 -0.49 1.Rc2 Qa1+ 2.Kh2 (305)
1/13 0:00 +0.11 1.e4 (619)
2/13 0:00 +0.11 1.e4 dxe4 2.Bxe4 (2.319)
3/24 0:00 +0.79 1.e4 dxe4 2.Bxe4 Qa4 3.Rxc3 Qa1+
4.Kh2 Qxc3 5.Qxd7 (11.042)
4/24 0:00 +0.55 1.e4 dxe4 2.Qxe4 Nf8 3.Qb7 (16.030)
5/24 0:00 +0.50 1.e4 dxe4 2.Bxe4 Nf8 3.d5 a5 4.d6 Qa4 (45.754)
6/28 0:00 +0.48 1.e4 dxe4 2.Bxe4 Nf8 3.Qb1 Qb2
4.Bxa8 Qxb1 5.Rxb1 Rxa8 (106.652)
7/32 0:00 +0.48 1.e4 dxe4 2.Bxe4 Nf8 3.Qb1 Qb2
4.Bxa8 Qxb1 5.Rxb1 Rxa8 (161.469)
8/32 0:00 +0.73 1.e4 dxe4 2.Bxe4 Nf8 3.Qb1 Ra7 4.Bb7 Rc4
5.Qb6 Rxb7 6.Qxb7 c2 7.h4 (252.839)
9/32 0:00 +0.49 1.e4 dxe4 2.Bxe4 Nf8 3.Qb1 Ng6 4.Bg3 Qb2
5.Bxa8 Qxb1 6.Rxb1 Rxa8 7.Rc1 (422.315)
10/39 0:02 +0.49 1.e4 dxe4 2.Bxe4 Nf8 3.Qb1 Ng6 4.Bg3 Qb2
5.Bxa8 Qxb1 6.Rxb1 Rxa8 7.Rc1 (1.412.095) 501
11/59 0:45 +0.55 1.e4 dxe4 2.Bxe4 Nf8 3.Re1 Ng6
4.Bxg6 hxg6 5.Rxe6 g5 6.Qd5 Kh8
7.Bd6 Qa4 8.Bc5 Qd1+ 9.Re1 (24.316.429) 529
12/59 0:54 +0.55 1.e4 dxe4 2.Bxe4 Nf8 3.Re1 Ng6
4.Bxg6 hxg6 5.Rxe6 g5 6.Qd5 Kh8
7.Bd6 Qa4 8.Bc5 Qd1+ 9.Re1 (29.183.237) 532
12/62 2:08 +2.17 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Rad8 6.Qe6 Rde8
7.Qc4 Qb2 8.Qxa6 Qxf2 9.Bh6 Rc8 (69.506.377) 543
13/62 2:09 +1.96 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Rad8 6.Qc5 Rc8 7.Qa7 Qd1
8.Ng5 Qh5 9.Qxa6 (70.192.950) 543
14/62 2:35 +2.13 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Rad8 6.Qe6 Rde8 7.e4 (83.664.785) 539
15/62 2:57 +1.94 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Rad8 6.Qe6 Rde8
7.Qd5 Qb2 8.Ne1 Qxf2 9.Nf3 c2 (96.945.771) 547
16/64 9:26 +2.03 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Rad8 6.Qa5 Qb2 7.Bh6 c2
8.Qc7 c1B (293.237.093) 517
17/66 13:17 +2.62 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Rad8 6.Qa5 c2 7.Qa4 Rc8
8.Bd6 Qb2 9.Ng5 Rcd8 10.Qxa6 Rde8
11.Qc6 fxg5 12.Bxc2 Kg8 13.Bxf8 Rxf8
14.Qd5+ (410.604.086) 515
18/74 25:24 +2.55 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Rad8 6.Qa5 Rde8
7.Bh6 Qb2 8.Qc7 Rg8 9.Qc6 Rgf8
10.Bxf8 Rxf8 11.Qc4 (838.175.420) 549
19/74 30:42 +2.54 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Qxe6 Rf8
4.Qf5 g6 5.Qxd5 Rad8 6.Bd6 Qb2 7.Qc6 Rc8
8.Qe4 a5 9.Kg1 Kg7 10.Bc5 Kg8
11.Qe6+ Kg7 12.Bxf8+ Rxf8 13.Qd7+ Kh8
14.Qc7 (997.591.450) 541
Just over two minutes and twelve plies, I think it is an improvement at least compared to earlier versions, if only I could get Blueberry to find 3. Ne5 again!
Eelco
If anyone wants to check the variations after 3.Ne5, here is a Multi_PV analysis after 1.Qxd7 Qxc1+ 2.Kh2 Kh8 3.Ne5 with an earlier version Blueberry 188, the eval actually went up after 3.Ne5 after large depth-searches but I'm not sure if that is real or related to inaccurate analysis...
[d]r1r4k/3Q2pp/p3pp2/3pN3/3P1B2/2pBP2P/5PPK/2q5 b - -
Engine: Blueberry Beta 4 DM70 Build 188 (Athlon 2009 MHz, 256 MB)
by F. Letouzey, T. Gaksch, E. de Groot
Code: Select all
12 37:32 -2.28 3...fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Bxg7+ Rxg7
7.Qxd5 Qxd3 8.e4 (1.353.273.782) 598
12 37:33 -9.16 3...Qa3 4.Nf7+ Kg8 5.Bd6 Qa4 6.Qxa4 Ra7
7.Bc5 Rxf7 8.Qxa6 Re8 9.Qc6 Rfe7
10.Bxe7 Rxe7 11.Qxc3 g6 12.Qc8+ Kg7 (1.353.629.168) 598
12 37:51 -M10 3...Rc7 4.Nf7+ Kg8 5.Bxc7 Rf8 6.Bd6 Qb2
7.Bxf8 Qb8+ 8.Bd6 f5 9.Bxb8 h6
10.Qxe6 g6 11.Qxg6+ Kf8 12.Bd6+ Ke8
13.Qe6+ (1.363.892.601) 598
12 45:58 -M10 3...Qh1+ 4.Kxh1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (1.648.864.353) 598
12 46:47 -M10 3...Qg1+ 4.Kxg1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (1.679.935.518) 598
12 47:08 -M7 3...Qxe3 4.fxe3 Rc7 5.Nf7+ Kg8 6.Bxc7 Rf8
7.Bd6 g6 8.Nh6+ Kh8 9.Bxf8 c2 10.Qg7+ (1.694.269.711) 598Code: Select all
13 57:48 -3.24 3...fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3
7.Qxd3 Rac8 8.Qc2 Rc4 9.e4 dxe4
10.d5 Rc5 11.Bxc3 Rgc8 12.Bxg7+ Kxg7
13.Qxe4 R5c7 14.Qe5+ Kf7 15.d6 Rc1
16.Qd5+ Ke8 (2.101.222.013) 638
13 59:12 -9.98 3...Qa3 4.Nf7+ Kg8 5.Bd6 Qa4 6.Qxa4 Ra7
7.Bc5 Rxf7 8.Qxa6 Re8 9.Qc6 Rfe7
10.Bxe7 Rxe7 11.Qc8+ Kf7 12.Bxh7 f5
13.Bg8+ Kg6 14.Qxc3 (2.148.165.031) 638
13 68:20 -M10 3...Qh1+ 4.Kxh1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (2.580.173.254) 638
13 76:51 -M10 3...Qg1+ 4.Kxg1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (2.942.179.626) 638
13 78:49 -M9 3...Rc7 4.Nf7+ Kg8 5.Bxc7 Rf8 6.Bd6 Qb2
7.Bxf8 Qb8+ 8.Bd6 f5 9.Bxb8 h6
10.Be5 Kh7 11.Nh8 Kxh8 12.Qxg7+ (3.015.190.334) 638
13 81:35 -M7 3...Qxe3 4.fxe3 Rc7 5.Nf7+ Kg8 6.Bxc7 Rf8
7.Bd6 g6 8.Nh6+ Kh8 9.Bxf8 g5
10.Qxh7+ (3.125.404.679) 638Code: Select all
14 82:39 -3.24 3...fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3
7.Qxd3 Rac8 8.Qc2 h5 (3.168.501.453) 642
14 82:47 -9.30 3...Qa3 4.Nf7+ Kg8 5.Bd6 Qa4 6.Nh6+ Kh8
7.Qxa4 Ra7 8.Bc5 Rac7 9.Qxa6 Rc6
10.Qa3 gxh6 11.Qxc3 R6c7 12.h4 Rb8
13.Qc2 (3.173.425.098) 642
14 83:13 -M10 3...Qh1+ 4.Kxh1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (3.189.012.313) 642
14 87:19 -M10 3...Qg1+ 4.Kxg1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (3.333.137.001) 642
14 90:22 -M9 3...Rc7 4.Nf7+ Kg8 5.Bxc7 Rf8 6.Bd6 Qb2
7.Bxf8 Qb8+ 8.Bd6 f5 9.Bxb8 h6
10.Be5 Kh7 11.Nh8 Kxh8 12.Qxg7+ (3.459.477.207) 642
14 91:58 -M7 3...Qxe3 4.fxe3 Rc7 5.Nf7+ Kg8 6.Bxc7 Rf8
7.Bd6 Ra8 8.Nd8 g6 9.Nxe6 Kh8 10.Qg7+ (3.544.545.842) 642Code: Select all
15 92:56 -3.18 3...fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3
7.Qxd3 Rac8 8.Qc2 Rc4 9.e4 dxe4
10.Kg3 Rgc8 11.h4 Kg8 12.Kg4 (3.585.748.581) 689
15 93:55 -10.03 3...Qa3 4.Nf7+ Kg8 5.Bd6 Qa4 6.Qxa4 Ra7
7.Bc5 Rxf7 8.Qxa6 Re8 9.Qc6 Rd8
10.Qxe6 g6 11.Bb4 Kg7 12.Qc6 Kh8
13.Bxc3 f5 (3.623.493.589) 689
15 105:12 -M10 3...Qh1+ 4.Kxh1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (4.314.125.312) 689
15 131:16 -M10 3...Qg1+ 4.Kxg1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (5.397.251.065) 689
15 151:36 -M9 3...Rc7 4.Nf7+ Kg8 5.Bxc7 Rf8 6.Bd6 Qb2
7.Bxf8 Qb8+ 8.Bd6 f5 9.Bxb8 h6
10.Be5 Kh7 11.Nh8 Kxh8 12.Qxg7+ (6.259.294.342) 689
15 160:48 -M7 3...Qxe3 4.fxe3 Rc7 5.Nf7+ Kg8 6.Bxc7 Rf8
7.Bd6 Ra8 8.Nd8 g6 9.Nxe6 g5 10.Qxh7+ (6.653.205.972) 689Code: Select all
16 161:41 -2.88 3...fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3
7.Qxd3 Rac8 8.Qc2 Rc4 9.e4 dxe4
10.Kg3 Rf8 11.Qe2 Rcc8 12.Kh4 Rfe8
13.Qxe4 Kg8 14.Qd5+ Kf8 15.Qf3+ Ke7
16.Bxg7 (6.693.806.824) 763
16 162:28 -9.58 3...Qa3 4.Nf7+ Kg8 5.Bd6 Qa4 6.Qxa4 Ra7
7.Bc5 Rxf7 8.Qxa6 Re8 9.Qc6 Rb8
10.Qxe6 Rd8 11.Bd6 g5 12.Bxh7+ Kg7
13.Bd3 Rfd7 14.Be7 (6.725.103.664) 763
16 185:57 -M10 3...Qh1+ 4.Kxh1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (8.322.507.580) 763
16 221:58 -M10 3...Qg1+ 4.Kxg1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (10.022.591.068) 763
16 253:43 -M9 3...Rc7 4.Nf7+ Kg8 5.Bxc7 Rf8 6.Bd6 Qb2
7.Bxf8 Qb8+ 8.Bd6 f5 9.Bxb8 h6
10.Be5 Kh7 11.Nh8 Kxh8 12.Qxg7+ (11.610.743.149) 763
16 266:28 -M7 3...Qxe3 4.fxe3 Rc7 5.Nf7+ Kg8 6.Bxc7 Rf8
7.Bd6 Ra8 8.Nd8 g6 9.Nxe6 g5
10.Qxh7+ (12.203.698.017) 763Code: Select all
17 270:45 -2.95 3...fxe5 4.Bxe5 Rg8 5.Qxe6 Qd1 6.Qf5 Qxd3
7.Qxd3 Rac8 8.Qc2 Rc4 9.e4 dxe4
10.Kg3 a5 11.Kf4 a4 12.Kxe4 Ra8
13.Kd3 Rcc8 14.d5 a3 15.Bxc3 a2
16.Bxg7+ Kxg7 (12.390.425.554) 779
17 276:32 -10.93 3...Qa3 4.Nf7+ Kg8 5.Bd6 Qa4 6.Qxa4 Ra7
7.Bc5 Rxf7 8.Qxa6 Re8 9.Qc6 Rd8
10.Qxe6 f5 11.Bb4 g6 12.Bxc3 Kg7
13.Bb5 f4 14.exf4 Ra7 15.Qe5+ Kg8 (12.623.967.602) 779
17 316:02 -M10 3...Qh1+ 4.Kxh1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (15.865.863.947) 779
17 652:42 -M10 3...Qg1+ 4.Kxg1 c2 5.Nf7+ Kg8 6.Qxe6 c1Q+
7.Kh2 Qc7 8.Nd8+ Kf8 9.Bd6+ Qxd6+
10.Qxd6+ Ke8 11.Bxh7 Ra7 12.Bg6+ Rf7
13.Bxf7+ (30.536.134.165) 779 (*)[d]3r1rk1/p1q4p/1pP1ppp1/2n1b1B1/2P5/6P1/P1Q2PBP/1R3RK1 w - - bm Bh6; id "sbd.015"; Silentbutdeadly.epd No.15; Possibly trapped Bishop to be evaluated versus the evaluation of connected Rooks. There was no evaluation of connected Rooks as yet in Fruit or Toga! At least I could not find any. So I had to make something up. I made two versions but the one that plays 1.Bh6 the fastest is probably no good
. But I have not tested yet if the penalty for Trapped Bishop on the sixth makes any difference, that is just a constant of 50 at the moment, this may slow down the search if Bishop turns out not to be actually trapped.)