Interesting position I recently got from Swami

[zullil]

[d]r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -
How long until your engine sees Bh3? (It takes a while for h5 to fade).
I am wondering if any engine sees it before ply 19.
Rybka took about 1/2 hour on my hardware, and IvanHoe about a minute.

Code: Select all

Stockfish-1.6.3 (8 threads, 1024M hash) takes 37 seconds:

Searching: r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -
infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0
 2     -0.32   00:00      260 Ne6 Qd6 
 2     -0.28   00:00      793 h5 Raf8 hxg6 hxg6 
 3     -0.16   00:00     1173 h5 Raf8 Ne6 
 4     -0.04   00:00     2857 h5 Qe7 hxg6 hxg6 
 5     -0.40   00:00     5168 h5 Qd6 Ne4 Qe6 Ng5 
 6     -0.20   00:00    16426 h5 Qe7 hxg6 hxg6 Qc2 Qf6 
 7     +0.36   00:00    44392 h5 Qd6 Ne4 Qb4 hxg6 hxg6 Qh6 
 8     +0.32   00:00    56538 h5 Qd6 Ne4 Qb4 hxg6 hxg6 Qh6 Rg7 Rb1 
 9     +0.40   00:00    81911 h5 Qd6 Ne4 Qb4 hxg6 hxg6 Qh6 Rg7 Bh3 Qxb3 Be6+ 
                              Kf8 
10     +0.40   00:00   144390 h5 Qd6 Ne4 Qb4 hxg6 hxg6 Qh6 Rg7 Bh3 Qxb3 Be6+ 
                              Kf8 
11     +0.36   00:00   358486 h5 gxh5 Qg5+ Kh8 Qxh5 Re7 Rc1 Qd6 Be4 Nf6 Qf5 
                              Nbd5 
12  >  +0.57   00:00    1317k h5 gxh5 Qg5+ Kh8 Qxh5 Re7 Qh6 Rf7 Ne6 Qe7 Rxe5 
                              Rf6 Qh3 
13     +0.48   00:01    2157k h5 gxh5 Qg5+ Kh8 Qxh5 Re7 Qh6 Rg8 Bh3 Rf7 Ne6 Qe7 
                              Rxe5 Rf6 Qd2 Nd7 
14     +0.44   00:01    3916k h5 gxh5 Qg5+ Kh8 Qxh5 Re7 Qh6 Rg8 Be4 Qc8 Qd2 Nf4 
                              Nd3 Nbd5 Nxf4 Nxf4 Qxa5 Nh3+ Kf1 Qg4 Qd2 
15     +0.73   00:02   10141k h5 gxh5 Bh3 Kh8 Ne6 Qd6 Qh6 Qe7 Qxh5 Qf6 Qxe5 
                              Qxe5 Rxe5 Nd7 Re4 Nc3 Ng5 Nxd1 Nxf7+ Kg7 
16     +0.24   00:03   16106k h5 gxh5 Bh3 Kh8 Ne6 Qd6 Qh6 Qe7 Rxe5 Nd7 Rf5 Rg8 
                              Nf4 Rxf5 Bxf5 Nxf4 Qxf4 Ne5 Be4 b6 
17     +0.24   00:05   29883k h5 gxh5 Bh3 Kh8 Ne6 Qd6 Qh6 Qe7 Rxe5 Nd7 Rf5 Rg8 
                              Nf4 Rxf5 Bxf5 Nxf4 Qxf4 Ne5 Qe4 Rg7 Kg2 Ng4 Qxe7 
                              Rxe7 
18     +0.61   00:12   82992k h5 gxh5 Bh3 Kh8 Qh6 Rg8 Be6 e4 Qxh5 Rxf2 Nxe4 Nf6 
                              Qh3 Nxe4 Bxg8 Ng5 Qg4 Rf3 Kg2 h6 Re8 
19     +0.40   00:15  111244k h5 gxh5 Bh3 Kh8 Qh6 Re8 Qxh5 Nf6 Qf5 Qe7 Nd3 Nfd7 
                              Qh5 Qf6 Bg4 Rg8 f3 Nd5 Nxe5 Nxe5 Qxe5 Qxe5 Rxe5 
                              Rff8 Rd4 Kg7 Bf5 
20     +0.20   00:30  225551k h5 gxh5 Bh3 Kh8 Qh6 Re8 Qxh5 Nf6 Qh4 Nfd5 Ne6 Qe7 
                              Qh5 Nd7 Ng5 Rg7 Bxd7 Qxd7 f4 b6 Rxe5 Rxe5 fxe5 
                              Kg8 Qh6 
20     +0.32   00:37  273722k Bh3 Qd6 Ne4 Qe7 Ng5 Rf6 Qb2 Nd7 Bxd7 Qxd7 Qxe5 
                              Qf5 Qxf5 Rxf5 f4 h6 Ne4 Rf7 Kf2 Kg7 Nc5 b6 Ne6+ 
                              Kf6 
21     +0.48   01:03  481909k Bh3 Qd6 Ne4 Qe7 Ng5 Rf6 Re2 Rd6 Bg4 h5 Bh3 Rad8 
                              Rde1 Nb4 Qe3 Nd7 Ne4 Rd4 Qh6 Nf8 Ng5 Qg7 Qxg7+ 
                              Kxg7 Rxe5 Nd5 Nf3 
22     +0.73   02:15    1040M Bh3 Qd6 Ne4 Qe7 Ng5 Rf6 Re2 Raf8 Rde1 Nd7 Qxa5 h6 
                              Ne4 R6f7 Qd2 Kh7 Nc3 N5f6 Qc2 Qc5 Rd1 Nb6 Be6 Re7 
                              b4 Qxb4 Rxe5 Nbd5 
23     +0.61   04:17    2013M Bh3 Qd6 Ne4 Qe7 Ng5 Rf6 Re2 Nd7 Rde1 Rd8 Qxa5 h6 
                              Ne4 Rff8 Qd2 Kg7 Qb2 Kh7 Nc3 N5f6 f4 Qc5+ Rf2 
                              exf4 b4 Qa7 Re7+ Kh8 gxf4 
24     +0.61   10:37    5052M Bh3 Qd6 Ne4 Qe7 Ng5 Rf6 Re2 Nd7 Rde1 Raf8 Qxa5 h6 
                              Ne4 R6f7 Qd2 Kg7 Nc3 N5f6 Qb2 Qd6 Rd1 Qb4 Bxd7 
                              Nxd7 Ne4 Re7 f4 Kh7 Rd6 Nc5 Nf6+ Kg7 Rxe5 Rxe5 
                              Qxe5 Qxb3 
Nodes: 8109013923
Nodes/second: 7945557
Best move: Bh3
Ponder move: Qd6

[kgburcham]

8
7
6
5
4
3
2
1
	a	b	c	d	e	f	g	h

r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - - 0 1

Rybka 3:

1.h5 Qe7 2.Nd3 Nd7 3.Bh3 Qf6 4.hxg6 hxg6 5.Bxd7 Rxd7 6.Nxe5 Re7 7.Ng4 Qd6
+/= (0.47) Depth: 12 00:00:01 285kN
1.h5 Qd6 2.hxg6 hxg6 3.Rc1 Qf6 4.Ne4 Qe7 5.Qh6 Rg7 6.Ng5 Rd8
+/= (0.48) Depth: 13 00:00:03 861kN
1.h5 Qd6 2.hxg6 hxg6 3.Rc1 Qf6 4.Ne4 Qe7 5.Bh3 Nd7 6.Ng5 Rf6
+/= (0.44) Depth: 14 00:00:04 1196kN
1.Bh3 Qd6 2.Rc1 Re7 3.h5 Qf6 4.Ne4 Qf3 5.hxg6 hxg6 6.Qh6 Qf7 7.Ng5
+/= (0.45) Depth: 14 00:00:05 1758kN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Re2 Re8 5.Qxa5 h6 6.Ne4 Rf3 7.Rb2 Qa3 8.Rdb1 Re7
+/= (0.37) Depth: 15 00:00:09 2741kN
1.h5 Qe7 2.Nd3 Nd7 3.f4 Qd8 4.Bxd5 cxd5 5.Nxe5 Nxe5 6.Rxe5 Qb6+ 7.Qe3 Qxe3+ 8.Rxe3 Rd8 9.hxg6 hxg6 10.Kg2 Kg7 11.Rd4 Kf6
+/= (0.54) Depth: 15 00:00:19 5515kN
1.h5 gxh5 2.Bh3 Rf6 3.Qg5+ Qg7
+/= (0.47) Depth: 16 00:00:55 18540kN
1.h5 gxh5 2.Qg5+ Rg7 3.Qxh5 Qe7 4.Nd3 Rg5 5.Qh4 Re8 6.Rc1 Rg7 7.Rxe5 Qxh4 8.Rxe8+ Kf7 9.gxh4 Kxe8 10.Rc5 Nb4 11.Ne1 Nd7 12.Rxa5 Rg4 13.h5 Ke7 14.Kf1
+/= (0.39) Depth: 17 00:01:49 36442kN
1.Rc1 Qd6 2.h5 Qf6 3.Ne4 Qe7 4.hxg6 hxg6 5.Qh6 Rg7 6.Ng5 Qf6 7.Rc5 Re7 8.Be4 Qg7
+/= (0.45) Depth: 17 00:02:39 52541kN
1.Rc1 Qd6 2.h5 Qf6 3.Ne4 Qe7 4.hxg6 hxg6 5.Qh6 Rg7 6.Ng5 Qf6 7.Re4 Rf8 8.Rh4 Re7 9.Ne4
+/= (0.47) Depth: 18 00:02:50 55309kN
1.Rc1 Qd6 2.h5 gxh5 3.Qg5+ Rg7 4.Qxh5 Re7 5.Qg5+ Kh8 6.Qd2 Qg6 7.Re4 Nf6 8.Rh4 Nbd5 9.Re1 Qg7 10.Ne4 Rd7 11.Bh3 Rdd8 12.Nxf6 Nxf6 13.Qb2 e4 14.Bf5 Rd5
+/= (0.45) Depth: 19 00:04:19 84391kN
1.Rc1 Re7 2.h5 gxh5 3.Qh6 Kh8 4.Qxh5 Rae8
+/= (0.31) Depth: 20 00:10:41 227mN
1.h5 gxh5 2.Qg5+
+/= (0.39) Depth: 20 00:15:06 323mN
1.Bh3
+/= (0.65 !) Depth: 20 00:18:36 375mN
1.Bh3 Qd6 2.Ne4
+/= (0.63) Depth: 20 00:21:29 427mN

[M ANSARI]

MP engines are undetermenistic, it is luck of the draw how fast a move is found sometimes. In this case R3 chooses Bh3 at depth 18

New game

8
7
6
5
4
3
2
1
	a	b	c	d	e	f	g	h

r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - - 0 1

Analysis by Rybka 3:

1.h5 Qe7 2.hxg6
+/= (0.41) Depth: 6 00:00:00 6kN
1.h5 Qe7 2.hxg6 hxg6 3.Nd3 Nd7 4.Bh3
+/= (0.55) Depth: 7 00:00:00 10kN
1.h5 Qe7 2.hxg6 hxg6 3.Nd3 Nd7 4.Bh3
+/= (0.52) Depth: 8 00:00:00 14kN
1.h5 Qe7 2.hxg6 hxg6 3.Nd3 Nd7 4.Bh3
+/= (0.52) Depth: 9 00:00:00 21kN
1.h5 Qe7 2.Nd3 Nd7 3.f4 Re8 4.Qxa5
+/= (0.45) Depth: 10 00:00:00 55kN
1.h5 Qe7 2.Nd3 Nd7 3.f4 Re8 4.Qxa5 Qd6
+/= (0.44) Depth: 11 00:00:00 127kN
1.h5 Qd6 2.Ne4 Qe7 3.hxg6 hxg6 4.Qh6 Rg7 5.Ng5 Rf8 6.f4
+/= (0.53) Depth: 12 00:00:01 438kN
1.h5 Qd6 2.Ne4 Qf8 3.Bh3 Re7 4.Ng5 Qf6
+/= (0.51) Depth: 13 00:00:01 560kN
1.h5 Qd6 2.Ne4 Qf8 3.Bh3 Re7 4.Qg5 Qf7 5.Rd3 Rf8 6.Qd2 gxh5
+/= (0.50) Depth: 14 00:00:01 797kN
1.h5 Qe7 2.Nd3 Nd7 3.f4 Qd8 4.Bxd5 cxd5 5.Nxe5 Nxe5 6.Rxe5 Qb6+ 7.Kg2 Qxb3 8.hxg6 hxg6 9.Qd3 Qxd3 10.Rxd3 Rc7 11.Rexd5 Rc2+ 12.Rd2 Rc4
+/= (0.57) Depth: 15 00:00:09 4258kN
1.h5 Qe7 2.Nd3 Nd7 3.f4 Qd8 4.Bxd5 cxd5 5.Nxe5 Nxe5 6.Rxe5 Qb6+ 7.Qe3 Qxe3+ 8.Rxe3 Rd7 9.Re5 d4 10.Kf2 Rc8 11.Rxa5 Rc2+ 12.Ke1 Rg2 13.hxg6
+/= (0.51) Depth: 16 00:00:15 6558kN
1.h5 Qe7 2.Nd3 Nd7 3.f4 Qa3 4.fxe5 N7b6 5.hxg6 hxg6 6.Rb1 Qe7 7.Re4 Raf8 8.Qxa5 Rf5 9.e6 Nc8 10.Qe1
+/= (0.62) Depth: 17 00:00:25 10648kN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Re2 Kh8 5.Qe1 Re8 6.Qxa5 h6 7.Ne4 Rf3 8.Rb2 Nd7 9.Qd2 Kg7 10.Qe2 Rff8 11.h5
+/= (0.55) Depth: 18 00:02:37 71296kN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Re2 Kh8 5.Qe1 Re8 6.Qxa5 h6 7.Ne4 Rf3 8.Rb2 Nd7 9.Qd2 Kg7 10.Qe2 Rff8 11.h5
+/= (0.55) Depth: 19 00:02:52 77262kN

(, Microsoft 02.02.2010)

[M ANSARI]

Just fresh out of the oven Stockfish 1.6.3 with seemingly vastly improved MP scaling.

New game

8
7
6
5
4
3
2
1
	a	b	c	d	e	f	g	h

r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - - 0 1

Analysis by Stockfish 1.6.3 JA 64bit:

1.h5 gxh5 2.Ne6 Qe7 3.Rxe5 Qf6 4.Qg5+ Kh8 5.Qxf6+ Rxf6 6.Ng5 h4 7.Ne4 Rff8 8.gxh4 Nd7
+/= (0.60) Depth: 6 00:00:00 6kN
1.h5 gxh5 2.Ne6 Qd6 3.Qg5+ Kh8 4.Rxe5 Nd7 5.Re2 N7f6 6.Bf3 Re8
+/= (0.48) Depth: 7 00:00:00 7kN
1.h5 gxh5 2.Qg5+ Kh8 3.Qxh5 Re8 4.Bh3 Nf6 5.Qf5 Nbd5 6.Ne6 Qb6 7.Qf3 e4 8.Rxe4 Rfe7 9.Re2
+/= (0.52) Depth: 8 00:00:00 10kN
1.h5 gxh5 2.Qg5+ Kh8 3.Qxh5 Re8 4.Bh3 Nf6 5.Qf5 Nbd5 6.Ne6 Qb6 7.Qf3 e4 8.Rxe4 Rfe7 9.Re2
+/= (0.32 --) Depth: 9 00:00:00 14kN
1.h5 gxh5 2.Qg5+ Kh8 3.Qxh5 Re8 4.Bh3 Nf6 5.Qg5 Nbd5 6.Be6 Rg7 7.Qxe5 b6 8.Qxc7 Rxc7
+/= (0.48) Depth: 10 00:00:00 24kN
1.h5 gxh5 2.Qg5+ Kh8 3.Qxh5 Re8 4.Bh3 Nf6 5.Qg5 Nbd5 6.Be6 Rg7 7.Qxe5 b6 8.Nd3 Qxe5 9.Rxe5 Rge7 10.Rde1
= (0.24) Depth: 11 00:00:00 60kN
1.h5 gxh5 2.Qg5+ Kh8 3.Qxh5 Re8 4.Bh3 Nf6 5.Qf5 Qe7 6.Nd3 Nbd7 7.Qg5 Qa3 8.Bxd7 Nxd7 9.Nxe5 Nxe5 10.Rxe5 Rxe5 11.Qxe5+ Kg8
+/= (0.44) Depth: 12 00:00:00 509kN
1.h5 gxh5 2.Qg5+ Rg7 3.Qxh5 Qe7 4.Rc1 Rg5 5.Qh3 Nf6 6.f4 Rh5 7.Rxe5 Rxe5 8.fxe5 Qxe5 9.Nxb7 Qd4+
+/= (0.64) Depth: 13 00:00:00 1254kN
1.h5 gxh5 2.Qg5+ Rg7 3.Qxh5 Qd6 4.Rc1 Re7 5.Qg5+ Kh8 6.Re2 Rg8 7.Qd2 Ra8 8.Be4 Qf6 9.f3 Rg7
= (0.20) Depth: 14 00:00:00 3229kN
1.h5 gxh5 2.Bh3 Kh8 3.Qb2 Rf6 4.Rxe5 Qg7 5.Rxh5 Nf4 6.Rh4 Nxh3+ 7.Rxh3 Nd5 8.Ne4 Rh6 9.Qxg7+ Kxg7 10.Rxh6 Kxh6 11.Kg2
+/= (0.36) Depth: 15 00:00:01 8703kN
1.h5 gxh5 2.Bh3 Kh8 3.Ne6 Qd6 4.Qh6 Qe7 5.Qxh5 Nd7 6.Nc7 N7f6 7.Nxd5 Nxh5 8.Nxe7 Rxe7 9.Rd6 Kg7 10.Bf5 Nf6
+/= (0.44) Depth: 16 00:00:02 20718kN
1.h5 gxh5 2.Bh3 Kh8 3.Qb2 Re8 4.Be6 Rg7 5.Rxe5 Qe7 6.Qd4 Qf6 7.Ne4 Qf8 8.Bxd5 Rxe5 9.Qxe5 Nxd5 10.Qxh5 Qe7 11.Qe2 Kg8 12.Qc4 Qf8 13.f4
+/= (0.36) Depth: 17 00:00:03 33886kN
1.h5 gxh5 2.Qg5+ Rg7 3.Qxe5 Qxe5 4.Rxe5 h4 5.gxh4 h6 6.Rd4 Kh7 7.Kf1 Rf7 8.Be4+ Kg7 9.Bd3 Raf8 10.Re2 Nf4 11.Rxf4 Rxf4 12.Ne6+ Kg8 13.Nxf4 Rxf4
+/= (0.28) Depth: 18 00:00:09 92742kN
1.h5 gxh5 2.Qg5+ Rg7 3.Qxe5 Qxe5 4.Rxe5 h4 5.gxh4 Kh8 6.Kf1 Rag8 7.Rg5 Rf7 8.Rxg8+ Kxg8 9.Re1 Kg7 10.Be4 Kf6 11.Bc2 Nb4 12.Re6+ Kg7 13.Be4
= (0.12) Depth: 19 00:00:23 229mN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Re2 Rd6 5.Bg4 h5 6.Bh3 Nc3 7.Qxd6 Qxd6 8.Rxd6 Nxe2+ 9.Kf1 Nd4 10.Rxg6+ Kh8 11.Nf7+ Kh7 12.Rg5
+/= (0.52 !) Depth: 19 00:00:33 320mN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Re2 Rd6 5.Bg4 h5 6.Bh3 Kg7 7.Ree1 Rf6 8.Qc2 Nd7 9.Qb2 Raf8 10.Bxd7 Qxd7 11.Qxe5 Kh8 12.Ne6
+/= (0.44) Depth: 20 00:00:39 379mN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Re2 Nd7 5.Rde1 Raf8 6.Qxa5 h6 7.Ne4 R6f7 8.Qd2 Kg7 9.Bxd7 Qxd7 10.Nc5 Qd6 11.Nd3 e4 12.Rxe4 Qa3 13.Qc2
+/= (0.64) Depth: 21 00:01:57 1104mN
1.Bh3 Qd6 2.Ne4 Qe7 3.Ng5 Rf6 4.Re2 Nd7 5.Rde1 Raf8 6.Qxa5 h6 7.Ne4 R6f7 8.Qd2 Kg7 9.Nc3 Nxc3 10.Qxc3 Qc5 11.Qc2 Re8 12.Qb2 Qa5 13.f4 Qc5+ 14.Kh2 Qd5 15.fxe5
+/= (0.68) Depth: 22 00:02:46 1565mN

(, Microsoft 02.02.2010)

[yanquis1972]

can we get an eval from rybka, or the new stockfish, from someone?

[MirceaH]

AMD Athlon 64 X2, WinXP 32bit, 256 MB hash

Code: Select all

FEN: r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - - 0 1 

Fruit 090705 w32 2CPU [003]:
   1	00:00	         107	0	+0.58	Nc5e6
   2	00:00	         218	0	+0.44	Nc5e6 Qc7d6
   3-	00:00	         526	0	+0.14	Nc5e6 Qc7d6 Ne6c5
   3	00:00	         692	0	+0.43	Qd2h6 Nb6d7
   4	00:00	       2.240	0	+0.36	Qd2h6 Qc7e7 Rd1c1
   5	00:00	       5.823	0	+0.20	Qd2h6 Nd5c3 Rd1d3 Nb6d5 Bg2xd5 Nc3xd5
   5	00:00	      10.774	0	+0.33	h4h5 Qc7d6 Nc5e4 Qd6a3 h5xg6 h7xg6
   6	00:00	      15.533	0	+0.32	h4h5 Qc7e7 Rd1c1 g6xh5 Qd2h6 Rf7f5
   7	00:00	      30.221	0	+0.49	h4h5 Qc7e7 Nc5e4 g6xh5 Qd2h6 Ra8d8 Qh6xh5
   8	00:00	      47.874	0	+0.39	h4h5 Qc7e7 h5xg6 h7xg6 Nc5d3 Rf7f5 Qd2h6 Qe7g7 Qh6xg7+ Kg8xg7 Nd3xe5
   9	00:00	      88.662	0	+0.52	h4h5 Qc7e7 h5xg6 h7xg6 Rd1c1 Qe7f6 Nc5e4 Qf6h8 Ne4d6 Rf7d7
  10	00:00	     156.302	0	+0.37	h4h5 Qc7e7 h5xg6 h7xg6 Nc5d3 Rf7f5 Qd2h6 Qe7g7 Qh6xg7+ Kg8xg7 g3g4 Rf5f8 Nd3xe5
  11	00:01	     368.718	0	+0.56	h4h5 Qc7e7 Rd1c1 g6xh5 f2f4 Ra8d8 Qd2b2 Qe7d6 Re1xe5 Rf7g7
  12	00:01	     617.130	432.614	+0.62	h4h5 Qc7e7 Rd1c1 Ra8d8 h5xg6 h7xg6 Qd2xa5 Qe7f6 Re1e2 Qf6g5 Rc1e1 Qg5f6 Bg2e4
  12	00:02	   1.033.249	862.862	+0.80	Bg2h3 Rf7f6 Qd2h6 Qc7g7 Qh6xg7+ Kg8xg7 Re1xe5 Rf6f7 Kg1g2 Nd5c3 Nc5e6+ Kg7f6 Rd1e1
  13	00:03	   1.517.609	879.095	+0.67	Bg2h3 Qc7d6 Nc5e4 Qd6e7 h4h5 g6xh5 Qd2h6 Kg8h8 Bh3e6 Rf7g7 Rd1d3 Ra8d8
  14	00:04	   2.111.111	883.520	+0.68	Bg2h3 Qc7d6 Nc5e4 Qd6e7 h4h5 Kg8h8 Bh3g4 Rf7f8 Qd2h6 Qe7g7 Qh6g5 Qg7e7 h5xg6 Qe7xg5 Ne4xg5
  15	00:10	   4.933.770	907.180	+0.68	Bg2h3 Qc7d6 Nc5e4 Qd6e7 h4h5 g6xh5 Qd2h6 Kg8h8 Qh6xh5 Ra8f8 Bh3g4 Nd5f6 Ne4xf6 Qe7xf6 f2f3
  16	00:23	  10.733.397	916.940	+0.54	Bg2h3 Qc7d6 Rd1c1 Ra8e8 Re1e2 Rf7e7 Bh3g2 Re8a8 Bg2e4 Qd6f6 Qd2h6 Ra8d8 h4h5 Qf6g7
  16	00:24	  11.192.697	917.942	+0.74	h4h5 Qc7e7 Nc5d3 Nb6d7 f2f4 g6xh5 Bg2xd5 c6xd5 Nd3xe5 Qe7c5+ Kg1g2 Rf7g7 Qd2xd5+ Qc5xd5+ Rd1xd5 Nd7xe5 f4xe5 h5h4 Re1e3 Rg7xg3+ Re3xg3+ h4xg3 Kg2xg3 Ra8c8 e5e6 Kg8f8
  17	00:32	  15.419.146	939.814	+0.74	h4h5 Qc7e7 Nc5d3 Nb6d7 f2f4 Qe7d8 f4xe5 Rf7e7 h5xg6 h7xg6 Bg2xd5+ c6xd5 Qd2f2 Qd8e8 Qf2d4 Qe8f7 Nd3f4 Ra8e8
  18	00:52	  24.706.450	946.705	+0.74	h4h5 Qc7e7 Nc5d3 Nb6d7 f2f4 Qe7d8 f4xe5 Rf7e7 h5xg6 h7xg6 Qd2h6 Qd8b6+ Nd3f2 Qb6xb3 Rd1d3 Qb3b4 Re1e4 Qb4b2 Qh6xg6+ Re7g7
  19	05:37	  51.545.889	604.318	+0.60	h4h5 g6xh5 Bg2h3 Rf7f6 Qd2g5+ Qc7g7 Bh3e6+ Kg8h8 Qg5xh5 Qg7e7 Be6xd5 Nb6xd5 Rd1c1 Ra8f8 Re1xe5 Qe7g7 Re5g5 Qg7f7 f2f4 Qf7xh5 Rg5xh5 Rf6g6 Kg1h2 Rf8g8
  19	06:39	  59.178.601	582.098	+0.74	Bg2h3 Kg8h8 h4h5 Qc7e7 h5xg6 h7xg6 Bh3e6 Rf7h7 Qd2b2 Qe7xc5 Qb2xe5+ Rh7g7 Kg1g2 Nd5e3+ Qe5xe3 Qc5xe3 Re1xe3 Rg7h7 Re3e4 Ra8e8 Be6d5 Re8d8
  20	09:27	  81.101.657	575.346	+0.56	Bg2h3 Kg8h8 h4h5 g6xh5 Qd2h6 Ra8g8 Bh3e6 Rg8g6 Qh6xh5 Nd5f4 Qh5xe5+ Qc7xe5 Re1xe5 Nf4xe6 Nc5xe6 Nb6d5 Rd1e1 Rf7f3 Ne6c5 Rf3f7 Kg1g2 Nd5f4+ Kg2f1
  21	17:48	 182.810.514	601.182	+0.72	Bg2h3 Qc7d6 Rd1c1 Rf7e7 Nc5e4 Qd6d8 Qd2g5 Kg8h8 h4h5 g6xh5 Qg5xh5 Qd8g8 Qh5h4 Qg8g6 Rc1d1 Ra8g8 Kg1h1 Rg8f8 Bh3g4
  22	25:51	 231.630.572	577.930	+0.68	Bg2h3 Qc7d6 Rd1c1 Rf7e7 Nc5e4 Qd6d8 Qd2g5 Kg8h8 h4h5 g6xh5 Qg5xh5 Qd8g8 Qh5h4 Qg8g6 Rc1c5 Ra8f8 Bh3g2 Rf8a8 Bg2f1 Re7f7 Ne4g5 Rf7f5

[P. Villanueva]

AMD turion x2 1600MHz, Vista 32bit
KMT Chess 1.2.1 32bit 96MB cache

Found in 10m at depth 14

ply score nodes time bf principal variation
1 22 98 0cs * g2e4
2 13 1467 1cs * c5d3 b6d7
3 12 4138 3cs 6.50 c5d3 b6d7 g2e4
4 -1 16030 9cs 3.31 c5d3 b6d7 g2h3 a8e8
5 8 36930 18cs 2.99 h4h5 c7d6 c5e4 d6d7 h5g6 h7g6
6 8 78953 34cs 2.22 h4h5 c7d6 c5e4 d6d7 h5g6 h7g6
7 4 177124 66cs 2.19 h4h5 c7d6 c5e4 d6d7 h5g6 h7g6 d2h6
8 19 307484 110cs 1.97 h4h5 c7d6 c5e4 d6b4 d2b4 a5b4 h5g6 h7g6
9 12 688724 233cs 1.97 h4h5 c7d6 c5e4 d6b4 d2b4 a5b4 h5g6 h7g6 d1d2
10 23 1285K 429cs 2.05 h4h5 c7d6 c5e4 d6b4 d2b4 a5b4 e4c5 a8a5 d1c1 f7e7 h5g6 h7g6
11 6 5687K 17s 2.87 h4h5 c7d6 c5e4 d6a3 g2h3 f7e7 d2d3 g6h5 e1e2 a8d8 e4f6 g8h8 f6h5
12 17 10M 30s 2.82 h4h5 c7d6 c5e4 d6a3 g2h3 f7e7 h5g6 h7g6 d2d3 a8f8 h3g4 e7h7
13 17 19M 56s 1.83 h4h5 c7d6 c5e4 d6a3 h5g6 h7g6 d1b1 f7g7 g2h3 a8e8 d2h6 a3b4 h3g4
14 30 226M 10m10s 4.72 g2h3 c7d6 c5e4 d6e7 e4g5 f7f6 f2f4 h7h6 f4e5 f6f8 g5e4 e7e5 d2h6 d5e7
NPS: 406300

[zullil]

[d]r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -
How long until your engine sees Bh3? (It takes a while for h5 to fade).
I am wondering if any engine sees it before ply 19.
Rybka took about 1/2 hour on my hardware, and IvanHoe about a minute.

Good "old" Crafty choose Bh3 in 20 secs. at depth 17:

Code: Select all

Crafty v23.1 (8 cpus)

White(1): setboard r5k1/1pq2r1p/1np3p1/p1Nnp3/P6P/1P4P1/3Q1PB1/3RR1K1 w - -
White(1): st 300
search time set to 300.00.
White(1): display stats
display statistics at end of each search.
White(1): go
              time limit 5:00 (+0.00) (5:00)
              depth   time  score   variation (1)
starting thread 1
starting thread 2
starting thread 3
starting thread 4
starting thread 5
starting thread 6
starting thread 7
                8     0.06  -0.32   1. Kh1 Kh8 2. Nd3 Nd7 3. Bh3 Re8 4.
                                    Qb2 N5f6
                8->   0.07  -0.32   1. Kh1 Kh8 2. Nd3 Nd7 3. Bh3 Re8 4.
                                    Qb2 N5f6 (s=2)
                9     0.09  -0.23   1. Kh1 Kh8 2. Nd3 Nd7 3. Bh3 Re8 4.
                                    Qb2 Rf3 5. Bxd7 Qxd7 6. Nxe5
                9->   0.10  -0.23   1. Kh1 Kh8 2. Nd3 Nd7 3. Bh3 Re8 4.
                                    Qb2 Rf3 5. Bxd7 Qxd7 6. Nxe5 (s=2)
               10     0.16  -0.22   1. Kh1 Qd6 2. Nd3 Re7 3. Re2 Kh8 4.
                                    Qe1 Nd7 5. Bh3 N5f6
               10     0.24  -0.11   1. h5 Qe7 2. Nd3 Nd7 3. hxg6 hxg6 4.
                                    f4 Qa3 5. Nxe5 Nxe5 6. Rxe5 Qxb3
               10->   0.24  -0.11   1. h5 Qe7 2. Nd3 Nd7 3. hxg6 hxg6 4.
                                    f4 Qa3 5. Nxe5 Nxe5 6. Rxe5 Qxb3 (s=2)
               11     0.29  -0.11   1. h5 Qe7 2. Nd3 Nd7 3. hxg6 hxg6 4.
                                    f4 Qa3 5. Nxe5 Nxe5 6. Rxe5 Qxb3
               11->   0.41  -0.11   1. h5 Qe7 2. Nd3 Nd7 3. hxg6 hxg6 4.
                                    f4 Qa3 5. Nxe5 Nxe5 6. Rxe5 Qxb3 (s=5)
               12     0.70   0.12   1. h5 Qd6 2. Ne4 Qf8 3. hxg6 hxg6 4.
                                    Ng5 Re7 5. Re4 Qf5 6. Rh4 Rf8 (s=4)
               12->   0.76   0.12   1. h5 Qd6 2. Ne4 Qf8 3. hxg6 hxg6 4.
                                    Ng5 Re7 5. Re4 Qf5 6. Rh4 Rf8
               13     0.91   0.17   1. h5 Qd6 2. Ne4 Qd7 3. Ng5 Re7 4.
                                    hxg6 hxg6 5. Bh3 Qd6 6. Re4 Kf8 7.
                                    Rh4
               13->   0.97   0.17   1. h5 Qd6 2. Ne4 Qd7 3. Ng5 Re7 4.
                                    hxg6 hxg6 5. Bh3 Qd6 6. Re4 Kf8 7.
                                    Rh4
               14     1.58   0.26   1. h5 Qd6 2. Ne4 Qf8 3. hxg6 hxg6 4.
                                    Ng5 Re7 5. Re4 Qf6 6. Rh4 Rd7 7. Ne4
                                    Qf5
               14->   2.71   0.26   1. h5 Qd6 2. Ne4 Qf8 3. hxg6 hxg6 4.
                                    Ng5 Re7 5. Re4 Qf6 6. Rh4 Rd7 7. Ne4
                                    Qf5 (s=2)
               15     3.18   0.28   1. h5 Qd6 2. Ne4 Qf8 3. hxg6 hxg6 4.
                                    Ng5 Re7 5. Re4 Nf6 6. Rh4 Rd7 7. Qe1
                                    Nh5 8. Rxd7 Nxd7
               15->   3.55   0.28   1. h5 Qd6 2. Ne4 Qf8 3. hxg6 hxg6 4.
                                    Ng5 Re7 5. Re4 Nf6 6. Rh4 Rd7 7. Qe1
                                    Nh5 8. Rxd7 Nxd7 (s=2)
               16     6.29   0.27   1. h5 gxh5 2. Qg5+ Rg7 3. Qxh5 Qd6
                                    4. Rc1 Re7 5. Be4 Rf8 6. Red1 Ref7
                                    7. f3 Kh8 8. Rd2 Rg7 9. Qh4
               16->   7.24   0.27   1. h5 gxh5 2. Qg5+ Rg7 3. Qxh5 Qd6
                                    4. Rc1 Re7 5. Be4 Rf8 6. Red1 Ref7
                                    7. f3 Kh8 8. Rd2 Rg7 9. Qh4
               17    10.22   0.26   1. h5 gxh5 2. Qg5+ Rg7 3. Qxh5 Qd6
                                    4. Rc1 Re7 5. Be4 Rf8 6. Red1 Ref7
                                    7. f3 Rg7 8. Kh1 Qe7 9. Rg1 Kh8
               17    19.73   0.44   1. Bh3 Qd6 2. Ne4 Qe7 3. Ng5 Rf6 4.
                                    f4 Nd7 5. Bg2 Qc5+ 6. Kh2 exf4 7. gxf4
                                    Qd6 8. Bxd5+ cxd5 9. Qxd5+ Qxd5 10.
                                    Rxd5 Rd8
               17->  19.73   0.44   1. Bh3 Qd6 2. Ne4 Qe7 3. Ng5 Rf6 4.
                                    f4 Nd7 5. Bg2 Qc5+ 6. Kh2 exf4 7. gxf4
                                    Qd6 8. Bxd5+ cxd5 9. Qxd5+ Qxd5 10.
                                    Rxd5 Rd8 (s=2)
               18    21.48   0.55   1. Bh3 Qd6 2. Ne4 Qe7 3. Ng5 Rf6 4.
                                    f4 Nd7 5. Bg2 Qc5+ 6. Kh2 exf4 7. gxf4
                                    Qd6 8. Bxd5+ cxd5 9. Qxd5+ Qxd5 10.
                                    Rxd5 Rd8 11. Re7
               18->  23.92   0.55   1. Bh3 Qd6 2. Ne4 Qe7 3. Ng5 Rf6 4.
                                    f4 Nd7 5. Bg2 Qc5+ 6. Kh2 exf4 7. gxf4
                                    Qd6 8. Bxd5+ cxd5 9. Qxd5+ Qxd5 10.
                                    Rxd5 Rd8 11. Re7 (s=2)
               19    36.30   0.66   1. Bh3 Qd6 2. Ne4 Qe7 3. Ng5 Rf6 4.
                                    f4 Qc5+ 5. Kh1 exf4 6. Ne4 Qe7 7. Nxf6+
                                    Qxf6 8. Re6 Qf7 9. Rf1 Re8 10. Rxe8+
                                    Qxe8 11. Re1 Qf7
               19->  41.30   0.66   1. Bh3 Qd6 2. Ne4 Qe7 3. Ng5 Rf6 4.
                                    f4 Qc5+ 5. Kh1 exf4 6. Ne4 Qe7 7. Nxf6+
                                    Qxf6 8. Re6 Qf7 9. Rf1 Re8 10. Rxe8+
                                    Qxe8 11. Re1 Qf7
               20    56.37   0.47   1. Bh3 Qd6 2. Ne4 Qe7 3. Ng5 Rf6 4.
                                    f4 Qc5+ 5. Kh2 exf4 6. Ne4 fxg3+ 7.
                                    Kxg3 Qe7 8. Nxf6+ Qxf6 9. Re6 Qc3+
                                    10. Qxc3 Nxc3 11. Rdd6 Ncd5 12. Re2
                                    Rf8
               20->   1:26   0.47   1. Bh3 Qd6 2. Ne4 Qe7 3. Ng5 Rf6 4.
                                    f4 Qc5+ 5. Kh2 exf4 6. Ne4 fxg3+ 7.
                                    Kxg3 Qe7 8. Nxf6+ Qxf6 9. Re6 Qc3+
                                    10. Qxc3 Nxc3 11. Rdd6 Ncd5 12. Re2
                                    Rf8 (s=2)
               21     1:52   0.43   1. Bh3 Qd6 2. Ne4 Qe7 3. Ng5 Rf6 4.
                                    f4 Qc5+ 5. Kh2 exf4 6. Ne4 fxg3+ 7.
                                    Kxg3 Qe7 8. Nxf6+ Qxf6 9. Re6 Qc3+
                                    10. Qxc3 Nxc3 11. Rdd6 Ncd5 12. Re1
                                    Rf8 13. Bg4
               21->   2:57   0.43   1. Bh3 Qd6 2. Ne4 Qe7 3. Ng5 Rf6 4.
                                    f4 Qc5+ 5. Kh2 exf4 6. Ne4 fxg3+ 7.
                                    Kxg3 Qe7 8. Nxf6+ Qxf6 9. Re6 Qc3+
                                    10. Qxc3 Nxc3 11. Rdd6 Ncd5 12. Re1
                                    Rf8 13. Bg4 (s=2)
               22     4:21   0.50   1. Bh3 Qd6 2. Ne4 Qe7 3. Ng5 Rf6 4.
                                    f4 Qc5+ 5. Kh1 exf4 6. Ne4 Qe7 7. Nxf6+
                                    Qxf6 8. Rf1 Re8 9. Rde1 Rxe1 10. Qxe1
                                    Qd4 11. gxf4 Nxf4 12. Qe8+ Kg7 13.
                                    Qe7+ Kg8 14. Be6+ Kh8
              time=5:00  mat=-1  n=6908932152  fh=93%  nps=23.0M      
              extensions=258.0M qchecks=217.6M reduced=714.4M pruned=2927.4M
              predicted=0  evals=2847.2M  50move=0  EGTBprobes=0  hits=0
              SMP->  splits=516837  aborts=62337  data=53/512  elap=5:00
terminating SMP processes.
White(1): Bh3
              time used:   5:00

[gerold]

You are right about Stockfish 1.6.3. ja
It has taken a big step forward.
Very strong.

Best,
Gerold.

[zullil]

Just fresh out of the oven Stockfish 1.6.3 with seemingly vastly improved MP scaling.

On an 8-core machine, the default value for the Minimum Split Depth parameter is now set at 7. Previously it was 4. In my testing, 7 yielded much better performance than 4, at least on my 8-core Mac Pro.

You can easily test if this change is responsible for the improvement you are seeing. Just set the parameter to 4 and see how much the performance drops.