test position: Bos-Severinov, RCCA-Bronze ICCF 2009

[jdart]

[d] 2r4k/1bq2rp1/3p2Rp/p3pP1P/np1NP3/3PQ3/PP6/1KN3R1 w - -

bm Rxh6+. This was the move played in the game, and I think it is best.

--Jon

[Joerg Oster]

[d] 2r4k/1bq2rp1/3p2Rp/p3pP1P/np1NP3/3PQ3/PP6/1KN3R1 w - -

bm Rxh6+. This was the move played in the game, and I think it is best.

--Jon

Hi Jon,

Stockfish 2.2.2 takes about 45 sec to find this one. Again, another nice position. Thanks.

Code: Select all

 1 [-2.34]  1.Sce2 exd4 2.Sxd4  (0.95)
 4 [-2.30]  1.Sce2 exd4 2.Sxd4 La6  (0.97)
 5 [-2.14]  1.Sce2 exd4 2.Sxd4 La6 3.T6g2  (0.97)
 6 [-1.85]  1.Sce2 exd4 2.Sxd4 Sxb2 3.Kxb2 La6  (0.98)
 7 [-0.68]  1.Sce2 exd4 2.Sxd4 La6 3.f6 gxf6 4.Dxh6+ Th7  (0.98)
 8 [-0.52]  1.Sce2 exd4 2.Sxd4 d5 3.f6 gxf6 4.T6g2 Th7 5.Se6  (0.98)
 9 [-0.68]  1.Sce2 exd4 2.Sxd4 d5 3.f6 gxf6 4.T6g2 Th7 5.Se6 De5  (1.00)
10 [-0.04]  1.Sce2 exd4 2.Sxd4 Sxb2 3.Kxb2 Dc3+ 4.Kb1 La6 5.Td1 Tfc7 6.f6 Kg8 7.fxg7  (1.01)
11 [-0.28]  1.Sce2 exd4 2.Sxd4 Sxb2 3.f6 Sxd3 4.Txg7 Txg7 5.fxg7+ Kg8 6.Dxh6 Dc1+ 7.Txc1 Txc1+ 8.Dxc1 Sxc1 9.Kxc1 Kxg7  (1.05)
12 [-0.28]  1.Sce2 exd4 2.Sxd4 Sxb2 3.f6 Sxd3 4.Txg7 Txg7 5.fxg7+ Kg8 6.Dxh6 Dc1+ 7.Txc1 Txc1+ 8.Dxc1 Sxc1 9.Kxc1 Kxg7 10.Sf5+  (1.06)
13 [+0.44]  1.Sce2 exd4 2.Sxd4 Sxb2 3.f6 Sxd3 4.Txg7 Txg7 5.fxg7+ Kg8 6.Dxh6 Dc1+ 7.Txc1 Txc1+ 8.Dxc1 Sxc1 9.Kxc1 Lxe4 10.h6 Ld5 11.Kb2 Le4 12.a3 bxa3+ 13.Kxa3  (1.11)
14 [+0.44]  1.Sce2 exd4 2.Sxd4 Sxb2 3.f6 Sxd3 4.Txg7 Txg7 5.fxg7+ Kg8 6.Dxh6 Dc1+ 7.Txc1 Txc1+ 8.Dxc1 Sxc1 9.Kxc1 Lxe4 10.h6 Ld5 11.Kb2 Kh7 12.Sf5 Le6 13.Sxd6 Kxh6 14.Sf5+ Kh7  (1.13)
16 [+0.80]  1.Sce2 exd4 2.Sxd4 Sxb2 3.f6 Sxd3 4.Txg7 Txg7 5.fxg7+ Kg8 6.Dxh6 Dc1+ 7.Txc1 Txc1+ 8.Dxc1 Sxc1 9.Kxc1 Lxe4 10.h6 Kh7 11.Kb2 Ld5 12.Sf5 Lg8 13.a3 bxa3+ 14.Kxa3  (1.31)
17 [+0.56]  1.Sce2 exd4 2.Sxd4 Sxb2 3.f6 Sxd3 4.Txg7 Txg7 5.fxg7+ Kg8 6.Dxh6 Dc1+ 7.Txc1 Txc1+ 8.Dxc1 Sxc1 9.Kxc1 Lxe4 10.h6 Ld5 11.Kb2 Lc4 12.Sf5  (1.38)
18 [+1.61]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 De7 7.Txh7+ Kxh7 8.Tg6 Kh8 9.Th6+ Kg8 10.Sb3 f5 11.Tg6+ Kh8 12.Dh6+ Dh7 13.Dg5 Tg8 14.exf5 Txg6 15.fxg6  (1.90)
20 [+1.77]  1.f6 gxf6 2.Txh6+ Th7 3.Txh7+ Dxh7 4.Sf5 Dxh5 5.Dg3  (2.13)
20 [+1.61]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 De7 7.Txh7+ Kxh7 8.Tg6 Kh8 9.Th6+ Kg8 10.Sb3 f5 11.Tg6+ Kh8 12.Dh6+ Dh7 13.Dg5 Tg8 14.exf5 Txg6 15.fxg6  (2.22)
21 [+2.08]  1.f6 gxf6 2.Txh6+ Th7 3.Txh7+ Dxh7 4.Sf5 Dxh5 5.Dg3  (2.65)
21 [M11]  1.Dd2 Sc3+ 2.Ka1 Sxa2 3.Sxa2 exd4 4.f6 Tg8 5.Dg2 Te8 6.fxg7+ Kg8 7.Txh6 Txg7 8.Tg6 Te7 9.h6 Txg6 10.Dxg6+ Kh8 11.Dg8#  (3.60)
21 [+1.53]  1.Dd2 Sc3+ 2.Ka1 exd4 3.f6 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txh7+ Kxh7 8.Tg6 Kh8 9.Sb3 Tg8 10.Sxa5 Txg6 11.hxg6 Dxg6 12.Dh2+ Kg7 13.Sxb7 Dxe4 14.Dg1+ Kf8 15.Sxd6 Dd5  (3.83)
21 [+1.65]  1.Dd2 Sc3+ 2.Ka1 exd4 3.f6 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txh7+ Kxh7 8.Tg6 Kh8 9.Sb3 Tg8 10.Sxa5 Txg6 11.hxg6 Dxg6 12.Dh2+ Kg7 13.Sxb7 Dxe4 14.Dg1+ Kf8 15.Sxd6 Dd5 16.Dh2 d3 17.Dh8+ Ke7 18.Sc8+ Kf7 19.Dh7+ Ke6 20.De7+ Kf5 21.Dxb4  (3.90)
22 [+1.57]  1.Dd2 Sc3+ 2.Ka1 exd4 3.f6 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txh7+ Kxh7 8.Tg6 Kh8 9.Sb3 Tg8 10.Sxa5 Txg6 11.hxg6 Dxg6 12.Dh2+ Kg7 13.Sxb7 Dxe4 14.Dg1+ Kf8 15.Sxd6 Dd5 16.Dh2 d3 17.Dh8+ Ke7 18.Sc8+ Kf7 19.Dh7+ Ke6 20.De7+ Kf5 21.Dxb4 d2  (4.14)
22 [+1.49]  1.Dd2 Sc3+ 2.Ka1 exd4 3.f6 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txh7+ Kxh7 8.Tg6 Kh8 9.Sb3 Tg8 10.Sxa5 Txg6 11.hxg6 Dxg6 12.Dh2+ Kg7 13.Sxb7 Dxe4 14.Dg1+ Kf8 15.Sxd6 Df3  (4.32)
22 [+1.65]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txh7+ Kxh7 8.Tg6 Kh8 9.Sb3 Tg8 10.Sxa5 Txg6 11.hxg6 Dxg6 12.Dh2+ Kg7 13.Sxb7 Dxe4 14.Dg1+ Kf8 15.Sxd6 Dd5 16.Dh2 d3 17.Dh8+ Ke7 18.Sc8+ Kf7 19.Dh7+ Ke6 20.De7+ Kf5 21.Dxb4 d2  (4.78)
23 [+1.73]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Tf8 9.Tdg6 Lxe4 10.Dg4 Lxg6 11.hxg6 Tg7 12.Dh3+ Kg8 13.Th1  (5.28)
23 [+1.81]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Tf8 9.Tdg6 Lxe4 10.Dg4 Lxg6 11.hxg6 Tg7 12.Dh3+ Kg8 13.Th1 Txg6 14.Dh8+ Kf7 15.Th7+ Ke6 16.Txe7+ Kxe7 17.Dh4+ Ke6 18.Dxd4  (5.41)
23 [+1.93]  1.f6 gxf6 2.Txh6+ Th7 3.Txh7+ Dxh7 4.Sf5 Dxh5 5.Dg3  (5.54)
23 [+2.12]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Tf8 9.Tdg6 Lxe4 10.Dg4 Lxg6 11.hxg6 Tg7 12.Dh3+ Kg8 13.Db3+  (5.70)
23 [+2.39]  1.f6 gxf6 2.Txh6+ Th7 3.Txh7+ Dxh7 4.Sf5 Dxh5 5.Dg3  (5.95)
23 [+2.14]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4 9.Txd4 La8 10.Sd3 Te8 11.Td6 Le4 12.Se5 Lf5 13.Dxf5 Dxd6 14.Sf7+ Txf7 15.Dxf7 De5  (6.69)
24 [+2.22]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 a4 9.e5 a3 10.bxa3 bxa3 11.Dxd4 Txh5 12.e6+  (7.05)
24 [+2.87]  1.f6 gxf6 2.Txh6+ Th7 3.Txh7+ Dxh7 4.Sf5 d5 5.Tg6 d4 6.Dd2  (8.38)
24 [+2.58]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4 9.Txd4 La8 10.Sd3 Tg7 11.Dh6+ Th7 12.Da6 Lb7 13.Dxa5 Tg7 14.Tf1 Lg2 15.Df5 Te8 16.Tf2  (8.91)
25 [+2.50]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4 9.Txd4 La8 10.Sd3 Tg7 11.Dh6+ Th7 12.Da6 Lb7 13.Dxa5 Tg7 14.Tf1 Lg2 15.Df5 Te8 16.Tf2 Tg5  (9.19)
25 [+2.66]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4 9.Txd4 La8 10.Sd3 Tg7 11.Dh6+ Th7 12.Da6 Lb7 13.Dg6 Df7 14.Dg5 De7 15.Df4 Txh5 16.Dg4 Dh7 17.Sf4  (9.49)
25 [+2.42]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4 9.Txd4 La8 10.Sd3 Tg7 11.Dh6+ Th7 12.Da6 Lb7 13.Dg6 Df7 14.Dg5 De7 15.Df4 Txh5 16.Dg4 Th7 17.Sf4  (9.66)
25 [+2.42]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4 9.Txd4 La8 10.Sd3 Tg7 11.Dh6+ Th7 12.Da6 Lb7 13.Dg6 Df7 14.Dg5 De7 15.Dxa5 Tg7 16.Tf1 Lg2 17.Df5 Te8 18.Tf2 Le4  (9.78)
26 [+2.50]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4 9.Txd4 La8 10.Sd3 Tg7 11.Dh6+ Th7 12.Da6 Lb7 13.Dg6 Df7 14.Dg3 Df6 15.Tg4  (10.65)
26 [+2.58]  1.f6 gxf6 2.Txh6+ Th7 3.Txh7+ Dxh7 4.Sf5 Tg8 5.Txg8+ Kxg8 6.Da7 Dd7 7.Dg1+  (11.01)
26 [+2.34]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4 9.Txd4 La8 10.Sd3 Tg7 11.Dh6+ Th7 12.Da6 Lb7 13.Dg6 Df7 14.Dg3 Txh5 15.Se5 Df6 16.Sg6+ Kh7 17.Td7+  (11.34)
26 [+2.97]  1.f6 gxf6 2.Txh6+ Th7 3.Txh7+ Dxh7 4.Sf5 Tg8 5.Txg8+ Kxg8 6.Da7 Dd7 7.Dg1+  (12.50)
26 [+2.74]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4 9.Txd4 La8 10.Sd3 Tg7 11.Dh6+ Th7 12.Da6 Lb7 13.Dg6 Lf3 14.h6 Te8 15.Sf4 Tf7 16.Tc4  (13.13)
27 [+3.03]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4  (15.50)
27 [+3.21]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4 9.Txd4 La8 10.Sd3 Tg7 11.Dh6+ Th7 12.Da6 Lb7 13.Dg6 Lf3 14.Df5 Tf8 15.Se5 Txf5 16.Sg6+ Kg7 17.Sxe7+ Kf6 18.Sxf5 Kxf5 19.Td8 Txh5 20.Tf8+ Ke4 21.Te1+  (16.45)
27 [+2.78]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 Df7 7.Txf6 De7 8.Txd6 Lxe4 9.Txd4 La8 10.Sd3 Tg7 11.Dh6+ Th7 12.Da6 Lb7 13.Dg6 Lf3 14.Df5 Tf8 15.Se5 Txf5 16.Sg6+ Kg7 17.Sxe7+ Kf6 18.Sxf5 Kxf5 19.Td8 Lxh5 20.Td5+ Ke4 21.Txa5 Le2 22.Ta8 Te7  (17.04)
28 [+2.70]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 De7 7.Txh7+ Kxh7 8.Tg6 Kh8 9.Th6+ Kg8 10.Sb3 Dxe4 11.Tg6+ Kf7 12.Dxf6+ Ke8 13.Tg8+ Kd7  (19.05)
28 [+2.62]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 De7 7.Txh7+ Kxh7 8.Tg6 Kh8 9.Th6+ Kg8 10.Sb3 Dxe4 11.Tg6+ Kf7 12.Dxf6+ Ke8 13.Tg8+ Kd7 14.Tg7+ Kc6 15.Sxd4+ Kb6 16.Dxd6+ Ka7 17.Sb5+ Ka8  (19.59)
28 [+2.32]  1.f6 exd4 2.Dd2 Sc3+ 3.Ka1 Sxe4 4.dxe4 gxf6 5.Txh6+ Th7 6.Df4 De7 7.Txh7+ Kxh7 8.Tg6 Kh8 9.Th6+ Kg8 10.Sb3 Dxe4 11.Tg6+ Kf7 12.Dxf6+ Ke8 13.Tg8+ Kd7 14.Tg7+ Kc6 15.Sxd4+ Kc5 16.Sb3+ Kb6 17.Df2+ Ka6 18.Df1+ Kb6 19.h6 De3  (21.22)
28 [+2.86]  1.Txh6+ Kg8 2.f6 exd4 3.De2 Dd8 4.fxg7 Txc1+ 5.Kxc1 Txg7 6.Txg7+ Kxg7 7.Dg2+ Kf7 8.Dg6+  (44.68)
28 [+3.27]  1.Txh6+ Kg8 2.f6 exd4 3.De2 Sc3+ 4.bxc3 dxc3 5.Sb3 Db6 6.Thg6 Tcc7 7.fxg7 Txg7 8.Dg4 c2+ 9.Kc1 De3+ 10.Sd2 Dd4 11.De6+ Kf8 12.Tf1+ Tgf7 13.Txf7+ Txf7 14.Dxd6+ Dxd6 15.Txd6 Tc7 16.Tg6 Tg7 17.Txg7 Kxg7 18.Sc4 a4 19.Kxc2 Lc8 20.Sb6 Le6 21.Sxa4 Kh6  (65.60)
30 [+3.35]  1.Txh6+ Kg8 2.f6 exd4 3.De2 Sc3+ 4.bxc3 dxc3 5.Sb3 Db6 6.Thg6 Tcc7 7.fxg7 Txg7 8.Dg4 c2+ 9.Kc1 De3+ 10.Sd2 Dd4 11.De6+ Kf8 12.Tf1+ Tgf7 13.Txf7+ Txf7 14.Dxd6+ Dxd6 15.Txd6 Tc7 16.Tg6 Tg7 17.Tb6 Tc7 18.d4 Kg7 19.Tb5 Lc8 20.Txa5  (91.99)
30 [+3.19]  1.Txh6+ Kg8 2.f6 exd4 3.De2 Sc3+ 4.bxc3 dxc3 5.Sb3 Db6 6.Thg6 c2+ 7.Kc1 Txf6 8.Txg7+ Kh8 9.T7g6 Tcf8 10.e5 Txg6 11.Txg6 Kh7 12.exd6 Ld5 13.d4  (100.05)
30 [+3.43]  1.Txh6+ Kg8 2.f6 exd4 3.De2 Lc6 4.fxg7 Sc3+ 5.bxc3 Txg7 6.Txg7+ Dxg7 7.Tg6  (108.63)
30 [+3.27]  1.Txh6+ Kg8 2.f6 exd4 3.De2 Sc3+ 4.bxc3 dxc3 5.Sb3 Db6 6.Thg6 Tcc7 7.fxg7 Txg7 8.Dg4 c2+ 9.Kc1  (119.49)
31 [+3.35]  1.Txh6+ Kg8 2.f6 exd4 3.De2 Sc3+ 4.bxc3 dxc3 5.Sb3 Db6 6.Thg6 Tcc7 7.fxg7 Txg7  (155.53)
31 [+3.43]  1.Txh6+ Kg8 2.f6 exd4 3.De2 d5 4.fxg7 Txg7 5.Txg7+ Dxg7 6.Tg6 Txc1+ 7.Kxc1  (189.90)
31 [+3.55]  1.Txh6+ Kg8 2.f6 exd4 3.De2 Sc3+ 4.bxc3 dxc3 5.Sb3 Db6 6.Thg6 Tcc7 7.fxg7 Txg7 8.Dg4 c2+ 9.Kc1 De3+ 10.Sd2 Dd4 11.De6+ Kf8 12.Tf1+ Tgf7 13.Txf7+  (213.32)
31 [+3.73]  1.Txh6+ Kg8 2.f6 exd4 3.De2 Dd7 4.fxg7 Txc1+ 5.Kxc1 Txg7 6.Txg7+ Kxg7 7.Tg6+ Kf7 8.Df2+  (245.53)
31 [+3.55]  1.Txh6+ Kg8 2.f6 exd4 3.De2 Sc3+ 4.bxc3 dxc3 5.Sb3 Db6 6.Thg6 Tcc7 7.fxg7 c2+ 8.Kc1 Txg7 9.Dg4 De3+ 10.Sd2 Dd4 11.De6+ Kf8 12.Tf1+ Tgf7 13.Txf7+ Txf7 14.Dxd6+ Dxd6 15.Txd6 Ke7 16.Tg6 Lc8 17.d4 Tf6 18.Kxc2 Txg6 19.hxg6 a4 20.Sc4 Kf6 21.Sb6 La6 22.Sd5+ Kxg6 23.Sxb4  (266.55)

[zullil]

[d] 2r4k/1bq2rp1/3p2Rp/p3pP1P/np1NP3/3PQ3/PP6/1KN3R1 w - -

bm Rxh6+. This was the move played in the game, and I think it is best.

--Jon

Critter has stuck with f6 for a long time, though the search is ongoing:

Code: Select all

Critter v1.6a 64-bit, by Richard Vida
hardware POPCNT enabled
setoption name Hash value 4096
setboard 2r4k/1bq2rp1/3p2Rp/p3pP1P/np1NP3/3PQ3/PP6/1KN3R1 w - -
info string Opening book: "book.cbk" - 57853 entries [native]
info string GTB Init OK (5 piece set)
info string Using 8 thread(s), 4096 MB hash LP=off
go infinite
 2/ 3  00:00      792  158400  -0.94 f6 exd4 fxg7+ Rxg7 Rxh6+ Kg8 Qxd4 Rxg1 Qxg1+ Kf8
 3/ 6  00:00     1137  189500  -0.94 f6 exd4 fxg7+ Rxg7 Rxh6+ Kg8 Qxd4 Rxg1 Qxg1+ Kf8
 4/ 9  00:00     2114  211400  -1.42 f6 exd4 fxg7+ Kg8 Qd2 Ba6 Rxh6 Rxg7 Rxg7+ Kxg7
 4/ 9  00:00     3403  226866  -0.62 Ncb3 exd4 Qxd4 Kg8 Ka1
 5/ 9  00:00     4415  232368  -0.42 Ncb3 exd4 Qxd4 Kg8 Ka1 Nc5 Rxh6 Nxb3+ axb3
 6/10  00:00     5216  260800  -0.42 Ncb3 exd4 Qxd4 Kg8 Ka1 Nc5 Rxh6 Nxb3+ axb3
 7/12  00:00     9090  267352  -0.42 Ncb3 exd4 Qxd4 Kg8 Ka1 Nc5 Rxh6 Nxb3+ axb3
 8/13+ 00:00    14596  275396  -0.33 Ncb3 exd4 Qxd4 Kg8 Ka1 Nc5 Rxd6 Nxb3+ axb3 Qc2 Rxh6 Qxb3
 8/14+ 00:00    17560  287868  -0.20 Ncb3 exd4 Qxd4 Kg8 Ka1 Nc5 Rxd6 Nxb3+ axb3 Qc2 Rxh6 Qxb3
 8/16- 00:00    28520  310000  -0.50 Ncb3 exd4 Qxd4 Kg8 Ka1 Nc5 Rxd6 Nxb3+ axb3 Qc2 Rxh6 Qxb3
 8/19- 00:00    34206  328903  -0.63 Ncb3 exd4 Qxd4 Kg8 Ka1 Nc5 Rxd6 Nxb3+ axb3 Qc2 Rxh6 Qxb3
 8/19  00:00    37113  331366  -0.67 Ncb3 exd4 Qxd4 d5 Rxh6+ Kg8 Ka1 dxe4 dxe4 Qc4 Re6 Qxd4 Nxd4
 9/20  00:00    54451  344626  -0.59 Ncb3 exd4 Qxd4 Qc2+ Ka1 Nc5 Rxg7 Nxb3+ axb3
 9/20+ 00:00    79108  385892  -0.59 Qd2 exd4 Nb3
 9/20+ 00:00    83875  395636  -0.46 Qd2 exd4 Nb3
 9/20+ 00:00    92991  406074  -0.27 Qd2 exd4 Nb3
 9/22  00:00   108006  401509  +0.00 Qd2 exd4 f6 Nc3+ Ka1 gxf6 Qxh6+ Rh7 Rg8+ Rxg8 Qxf6+ Rhg7 Qh6+ Rh7 Qf6+
10/26  00:00   143974  452748  +0.00 Qd2 Nc3+ bxc3 bxc3 Qf2 Qb6+ Ncb3 a4 f6 axb3 fxg7+ Kg8
11/29  00:00   246440  569145  +0.00 Qd2 Nc3+ Ka1 exd4 f6 gxf6 Qxh6+ Rh7 Rg8+ Rxg8 Qxf6+ Rhg7 Qh6+ Rh7 Qf6+
12/30+ 00:00   452831  775395  +0.08 Qd2 Nc3+ Ka1 exd4 f6 gxf6 Qxh6+ Rh7 Rg8+ Rxg8 Qxf6+ Rhg7 Qh6+ Rh7 Qf6+
12/30+ 00:00   664653  869964  +0.21 Qd2 Nc3+ Ka1 exd4 f6 gxf6 Qxh6+ Rh7 Rg8+ Rxg8 Qxf6+ Rhg7 Qh6+ Rh7 Qf6+
12/31  00:00   834922  925634  +0.26 Qd2 exd4 f6 Rg8 fxg7+ Rgxg7 Rxg7 Rxg7 Qxh6+ Kg8 Qe6+ Kh7 Rg6 Qf7 Qxd6 Qc7 Rh6+ Kg8 Qxd4 Nc5 Ne2 Nd7 Re6 Rg2 h6 Ne5 Qxe5 Qxe5 Rxe5 Rxe2 Rxa5
13/32+ 00:01    1149K   1059K  +0.35 Qd2 exd4 f6 Rg8 fxg7+ Rgxg7 Rxg7 Rxg7 Qxh6+ Kg8 Qe6+ Kh7 Rg6 Qf7 Qxd6 Qc7 Rh6+ Kg8 Qxd4 Nc5 Ne2 Nd7 Re6 Rg2 h6 Ne5 Qxe5 Qxe5 Rxe5 Rxe2 Rxa5
13/32+ 00:01    1568K   1258K  +0.48 Qd2 exd4 f6 Rg8 fxg7+ Rgxg7 Rxg7 Rxg7 Qxh6+ Kg8 Qe6+ Kh7 Rg6 Qf7 Qxd6 Qc7 Rh6+ Kg8 Qxd4 Nc5 Ne2 Nd7 Re6 Rg2 h6 Ne5 Qxe5 Qxe5 Rxe5 Rxe2 Rxa5
13/32  00:01    1852K   1367K  +0.66 Qd2 Nc3+ Ka1 exd4 f6 gxf6 Qxh6+ Rh7 Rg8+ Rxg8 Qxf6+ Rhg7 Qh6+ Rh7 Qf6+
14/32+ 00:01    3724K   1948K  +0.75 Qd2 Nc3+ Ka1 exd4 f6 gxf6 Qxh6+ Rh7 Rg8+ Rxg8 Qxf6+ Rhg7 Qh6+ Rh7 Qf6+
14/40+ 00:02    5724K   2493K  +0.88 Qd2 Nc3+ Ka1 exd4 f6 gxf6 Qxh6+ Rh7 Rg8+ Rxg8 Qxf6+ Rhg7 Qh6+ Rh7 Qf6+
14/50  00:02    8396K   2850K  +0.94 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Rxh6+ Rh7 Rxf6 Bxe4 h6 Re7 Nb3 Rg8 Rxg8+ Kxg8 Nxd4 Rf7 h7+ Bxh7 Ne6 Rxf6 Qg2+ Rg6 Qa8+
15/50- 00:03    9304K   2967K  +0.86 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Rxh6+ Rh7 Rxf6 Bxe4 h6 Re7 Nb3 Rg8 Rxg8+ Kxg8 Nxd4 Rf7 h7+ Bxh7 Ne6 Rxf6 Qg2+ Rg6 Qa8+
15/50  00:03   11302K   3328K  +0.94 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Rxh6+ Rh7 Rxf6 Bxe4 h6 Re7 Nb3 Rg8 Rc1 Qb6 Qf2 Bh7 Nxd4 Re4 Rd1 a4 Rf7 d5 Qh2 Ree8
16/50- 00:03   12806K   3524K  +0.85 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Rxh6+ Rh7 Rxf6 Bxe4 h6 Re7 Nb3 Rg8 Rc1 Qb6 Qf2 Bh7 Nxd4 Re4 Rd1 a4 Rf7 d5 Qh2 Ree8
16/50  00:04   17871K   4238K  +0.84 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Bxe4 Rxf6 d3 Rf1 Rg8 Rf8 Bd5 Nxd3 Rf7 Rxf7 Bxf7 Re1 Qa7 Nf2 Rg6 Ng4 Bg8 b3 Qc5 Kb1 Qc3
17/50+ 00:05   31158K   5427K  +0.92 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Bxe4 Rxf6 d3 Rf1 Rg8 Rf8 Bd5 Nxd3 Rf7 Rxf7 Bxf7 b3 Bh5 Re1 Qf8 Qd4+ Kh7 Nf4 Rg4 Qd3+ Bg6 Nxg6 Rxg6 Re6
17/54+ 00:07   45260K   6111K  +1.05 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Bxe4 Rxf6 d3 Rf1 Rg8 Rf8 Bd5 Nxd3 Rf7 Rxg8+ Kxg8 Qg3+ Kh7 Nf4 Qe5
17/54+ 00:09   60226K   6564K  +1.25 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Bxe4 Rxf6 d3 Rf1 Rg8 Rf8 Bd5 Nxd3 Rf7 Rxg8+ Kxg8 Qg3+ Kh7 Nf4 Qe5
17/54+ 00:11   84005K   7056K  +1.53 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Bxe4 Rxf6 Qe8 Rxd6 Rf7 Qg4 Rfc7 Nb3 Qg8 Qd1 Qc4 Rxd4 Qc2 Qxc2 Bxc2 Nxa5 Bh7
17/56  00:15  109579K   7297K  +1.62 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Bxe4 Rxf6 Re8 Nb3 Bd5 Rxd6 Bf7 Qxd4+ Qe5 Qd3 Bxb3 axb3 Rf7 Qc4 Rf1+
18/56+ 00:21  174395K   8028K  +1.73 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Bxe4 Rxf6 Re8 Nb3 Bd5 Rxd6 Bf7 Qxd4+ Qe5 Qxe5+ Rxe5 Nxa5 Re8 Nc6 Be6 Nxb4 Rxh6 Nc6
18/56- 00:22  182185K   8002K  +1.52 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Bxe4 Rxf6 Re8 Nb3 Bd5 Rxd6 Bf7 Qxd4+ Qe5 Qxe5+ Rxe5 Nxa5 Re8 Nc6 Be6 Nxb4 Rxh6 Nc6
18/70+ 00:29  241282K   8275K  +1.88 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Bxe4 Rxf6 Re8 Nb3 Bd5 Rxd6 Bf7 Qxd4+ Qe5 Qxe5+ Rxe5 Nxa5 Re8 Nc6 Be6 Nxb4 Rxh6 Nc6
18/70  00:29  244697K   8254K  +1.37 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Rxh6+ Rh7 Rxf6 Bxe4 h6 Re7 Nb3 Rg8 Rc1 Qb6 Qf2 Bh7 Nxd4 Re4 Rd1 a4 Rf7 d5 Qh2 Re3
18/70  00:31  263852K   8349K  +1.86 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Rf7 Qg4 Qe8 Nb3 Bxe4 Rxf6 Rfc7 Re6 Qg8 Rxe4 Qxg4 Rexg4 a4 Nd2 Rc1+ Nb1 Rxg1 Rxg1 Rg8 Rd1 Rg4 Nd2 Rf4 Nc4 Kh7 Nxd6 Rf2
19/70- 00:32  268770K   8317K  +1.75 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Rf7 Qg4 Qe8 Nb3 Bxe4 Rxf6 Rfc7 Re6 Qg8 Rxe4 Qxg4 Rexg4 a4 Nd2 Rc1+ Nb1 Rxg1 Rxg1 Rg8 Rd1 Rg4 Nd2 Rf4 Nc4 Kh7 Nxd6 Rf2
19/70+ 00:42  359133K   8540K  +1.97 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Rf7 Qg4 Qe8 Nb3 Bxe4 Rxf6 Rfc7 Re6 Qg8 Rxe4 Qxg4 Rexg4 a4 Nd2 Rc1+ Nb1 Rxg1 Rxg1 Rg8 Rd1 Rg4 Nd2 Rf4 Nc4 Kh7 Nxd6 Rf6 Ne4 Rxh6 Kb1
19/70  00:42  359839K   8535K  +1.58 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Rxh6+ Rh7 Rxf6 Bxe4 h6 Re7 Nb3 Rg8 Rc1 Qb6 Qf2 Bh7 Nxd4 Re4 Rd1 a4 Rf7 d5 Qh2 Re3
20/70+ 00:49  434461K   8794K  +1.68 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Rxh6+ Rh7 Rxf6 Bxe4 h6 Re7 Nb3 Rg8 Rc1 Qb6 Qf2 Bh7 Nxd4 Re4 Rd1 a4 Rf7 d5 Qh2 Re3
20/70+ 00:55  497097K   8959K  +1.82 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Rxh6+ Rh7 Rxf6 Bxe4 h6 Re7 Nb3 Rg8 Rc1 Qb6 Qf2 Bh7 Nxd4 Re4 Rd1 a4 Rf7 d5 Qh2 Re3
20/70+ 01:12  670518K   9247K  +2.04 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Rxh6+ Rh7 Rxf6 Bxe4 h6 Re7 Nb3 Rg8 Rc1 Qb6 Qf2 Bh7 Nxd4 Re4 Rd1 a4 Rf7 d5 Qh2 Re3
20/70  01:13  681326K   9246K  +2.03 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Rf7 Qg4 Qe8 Nb3 Bxe4 Rxf6 Rfc7 Re6 Qg8 Rxe4 Qxg4 Rexg4 a4 Nd2 Rc1+ Nb1 Rxg1 Rxg1 Rc5 Nd2 Kh7 Kb1 Kxh6 Rg4 Rd5 Kc2 d3+ Kd1 Rb5
21/70+ 01:42  976000K   9549K  +2.15 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Rf7 Qg4 Qe8 Nb3 Bxe4 Rxf6 Rfc7 Re6 Qg8 Rxe4 Qxg4 Rexg4 a4 Nd2 Rc1+ Nb1 Rxg1 Rxg1 Rc5 Nd2 Kh7 Kb1 Kxh6 Rg4 Rd5 Kc2 d3+ Kd1 Rb5
21/70  01:43  987447K   9548K  +1.99 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Rxh6+ Rh7 Rxf6 Bxe4 h6 Re7 Nb3 Rg8 Rc1 Qb6 Qf2 Bh7 Nxd4 Re4 Rd1 a4 Rf7 d5 Qh2 Re3
22/70  02:04    1216M   9749K  +1.98 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Rf7 Qg4 Qe8 Nb3 Bxe4 Rxf6 Rfc7 Re6 Qg8 Rxe4 Qxg4 Rexg4 a4 Nd2 Rc1+ Nb1 Rxg1 Rxg1 Rc5 Nd2 Kh7 Kb1 Kxh6 Rh1+ Rh5 Rxh5+ Kxh5 Kc2
23/70+ 03:20    2061M  10265K  +2.10 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Rf7 Qg4 Qe8 Nb3 Bxe4 Rxf6 Rfc7 Re6 Qg8 Rxe4 Qxg4 Rexg4 a4 Nd2 Rc1+ Nb1 Rxg1 Rxg1 Rc5 Nd2 Kh7 Kb1 Kxh6 Rh1+ Rh5 Rxh5+ Kxh5 Kc2
23/70+ 05:28    3426M  10417K  +2.28 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Rf7 Qg4 Qe8 Nb3 Bxe4 Rxf6 Rfc7 Re6 Qg8 Rxe4 Qxg4 Rexg4 a4 Nd2 Rc1+ Nb1 Rxg1 Rxg1 Rc5 Nd2 Kh7 Kb1 Kxh6 Rh1+ Rh5 Rxh5+ Kxh5 Kc2
23/70  08:47    5556M  10541K  +2.54 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Rf7 Qg4 Qe8 Nb3 Bxe4 Rxf6 Rfc7 Re6 Qg8 Rxe4 Qxg4 Rexg4 a4 Nd2 Rc1+ Nb1 Rxg1 Rxg1 Rc5 Nd2 Rf5 Kb1 Kh7 Kc2 Kxh6 Rg4 Rc5+ Kd3 a3 Rh4+ Kg5 Rxd4 axb2
24/71+ 16:51   10936M  10816K  +2.69 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Rf7 Qg4 Qe8 Nb3 Bxe4 Rxf6 Rfc7 Re6 Qg8 Rxe4 Qxg4 Rexg4 a4 Nd2 Rc1+ Nb1 Rxg1 Rxg1 Rc5 Nd2 Kh7 Ne4 Rf5 Nxd6 Rf3 Kb1 Kxh6 Nc4 b3 Rd1 bxa2+ Kxa2 Rf4 Nd6 Kg6 Nb5 a3 b4 d3 Kxa3 Rf3 Nd4
24/76+ 29:19   19200M  10912K  +2.93 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Rf7 Qg4 Qe8 Nb3 Bxe4 Rxf6 Rfc7 Re6 Qg8 Rxe4 Qxg4 Rexg4 a4 Nd2 Rc1+ Nb1 Rxg1 Rxg1 Rc5 Nd2 Kh7 Ne4 Rf5 Nxd6 Rf3 Kb1 Kxh6 Nc4 b3 Rd1 bxa2+ Kxa2 Rf4 Nd6 Kg6 Nb5 a3 b4 d3 Kxa3 Rf3 Nd4
24/77  30:06   19701M  10906K  +2.92 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 h6 Bxe4 Rxf6 Qe8 Nd3 Rhc7 Rxd6 Qe7 Ne5 Re8 Nd7 Rec8 Rxd4 Bh7 Rdd1 Rc4 Qd2 Rd8 Rg7 Rxd7 Qxd7 Qxd7 Rgxd7 Bc2 Rf1 Rc8 Rc1 a4 Rb7 b3 Ra7 Rc6 Rf1 Bf5 Rxa4 Kh7 Rb4 Bd3 Rb7+ Kxh6 Rh1+ Kg5 Rxb3

[Vinvin]

[d] 2r4k/1bq2rp1/3p2Rp/p3pP1P/np1NP3/3PQ3/PP6/1KN3R1 w - -

bm Rxh6+. This was the move played in the game, and I think it is best.

--Jon

Critter has stuck with f6 for a long time, though the search is ongoing:
...

2 or 3 best moves variations should help to see more clearly in the Critter's eval and best lines ...

[Ajedrecista]

Hello!

Rybka has done an incredible job in my computer.

Analysis by Deep Rybka 4.1 w32 (using two cores) in an Intel Pentium D930, with 512 MB of hash and 64 MB for Nalimov TBs (up to five pieces), running under Arena 2.0.1 GUI:

[d]2r4k/1bq2rp1/3p2Rp/p3pP1P/np1NP3/3PQ3/PP6/1KN3R1 w - - 0 1

FEN: 2r4k/1bq2rp1/3p2Rp/p3pP1P/np1NP3/3PQ3/PP6/1KN3R1 w - - 0 1

Deep Rybka 4.1 w32:

1 00:00 165 953 -1,84 f5f6 e5xd4 f6xg7+

2 00:00 211 1.219 -1,84 f5f6 e5xd4 f6xg7+ Kh8g8 Qe3e2 Qc7c5
2+ 00:00 237 1.369 -1,72 Rg6xh6+ g7xh6 Qe3xh6+
2+ 00:00 286 1.513 -0,37 Rg6xh6+ g7xh6 Qe3xh6+
2 00:00 370 1.813 -0,33 Rg6xh6+ Kh8g8 Nc1b3 e5xd4 Nb3xd4 d6d5

3 00:00 418 1.900 -0,26 Rg6xh6+ Kh8g8 Nc1b3 e5xd4 Nb3xd4 d6d5 Kb1a1 Qc7h2

4 00:00 1.318 5.584 -0,46 Nc1b3 e5xd4 Qe3xd4 d6d5 Rg6xh6+ Kh8g8 Kb1a1

5 00:00 2.833 10.010 -0,48 Nc1b3 e5xd4 Qe3xd4 d6d5 e4xd5 Rf7xf5 Rg6xg7 Rf5f1+ Rg1xf1 Qc7xg7 d5d6 Bb7g2 Rf1e1

6+ 00:01 4.148 12.607 -0,36 Nc1b3 e5xd4 Qe3xd4 d6d5 e4xd5 Rf7xf5 Rg6xg7 Rf5f1+ Rg1xf1 Qc7xg7 d5d6 Bb7g2 Rf1e1
6+ 00:01 5.870 14.974 -0,21 Nc1b3 e5xd4 Qe3xd4 d6d5 e4xd5 Rf7xf5 Rg6xg7 Rf5f1+ Rg1xf1 Qc7xg7 d5d6 Bb7g2 Rf1e1
6 00:01 7.060 16.690 -0,33 Nc1b3 e5xd4 Qe3xd4 Kh8h7 Rg1c1 Qc7d8 Rc1xc8 Bb7xc8 Qd4xd6 Rf7d7

7+ 00:01 31.656 32.105 -0,21 Rg6xh6+ Kh8g8 Nc1b3 e5xd4 Nb3xd4 d6d5 Rg1g2 d5xe4 d3xe4 Bb7xe4+
7 00:02 54.771 35.019 -0,16 Rg6xh6+ Kh8g8 Nc1b3 e5xd4 Nb3xd4 Na4xb2 f5f6 Nb2xd3 Qe3xd3 Qc7c4 Qd3xc4 Rc8xc4 f6xg7 Bb7xe4+ Kb1b2 Rf7xg7 Rg1xg7+ Kg8xg7 Rh6xd6 Kg7h7 a2a3

8 00:02 70.965 37.193 -0,31 Rg6xh6+ Kh8g8 Nc1b3 e5xd4 Nb3xd4 Na4xb2 f5f6 Nb2xd3 Qe3xd3 Qc7c3 Qd3xc3 b4xc3 Kb1c1 Bb7xe4 Nd4b5 d6d5 Nb5d6 Rc8b8 Rh6h8+ Kg8xh8

9+ 00:02 88.228 38.127 -0,19 Rg6xh6+ Kh8g8 Nc1b3 e5xd4 Nb3xd4 Na4xb2 Rh6g6 Qc7c3 Rg6xg7+ Rf7xg7 Rg1xg7+ Kg8xg7 Qe3g5+ Kg7f7 Qg5g6+ Kf7e7 Qg6e6+ Ke7d8 Qe6xd6+
9 00:03 99.608 39.827 -0,31 Rg6xh6+ Kh8g8 Nc1b3 e5xd4 Nb3xd4 Na4xb2 f5f6 Nb2xd3 Qe3xd3 Qc7c3 Qd3xc3 b4xc3 Kb1c1 Bb7xe4 Nd4b5 d6d5 Nb5d6 Rc8b8 Nd6xe4 d5xe4 Rh6g6

10 00:03 115.706 41.117 -0,31 Rg6xh6+ Kh8g8 Nc1b3 e5xd4 Nb3xd4 Na4xb2 f5f6 Nb2xd3 Qe3xd3 Qc7c3 Qd3xc3 b4xc3 Kb1c1 Bb7xe4 Nd4b5 d6d5 Nb5d6 Rc8b8 Nd6xe4 d5xe4 Rh6g6

11+ 00:07 271.258 39.536 -0,19 Rg6xh6+ Kh8g8 Qe3d2 e5xd4 f5f6 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7c5 Rh6g6
11+ 00:08 315.934 38.802 -0,04 Rg6xh6+ Kh8g8 Qe3d2 e5xd4 f5f6 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7b6 Rg1xg7+ Rf7xg7 f6xg7 Qb6c5 Rh6g6 Qc5xh5 Rg6xd6 Rc8c7 Rd6d8+ Kg8xg7 Qc2g2+ Kg7h6 Qg2g3
11+ 00:14 549.404 40.181 +0,36 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7b6 Rg1g6 Rf7xf6 Rg6xf6 g7xf6 Qc2g2+
11 00:16 653.369 40.088 +0,47 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7c5 Rh6g6 Rf7xf6 Rg1g5 Qc5e3 Rg5g3 Qe3e1 Rg3g1 Qe1e3 Rg1g3 Qe3e1 Rg3g1 Qe1e3 Rg1g3 Qe3e1 Rg3g1 Qe1e3 Rg1g3 Qe3e1 Rg3g1 Qe1e3 Rg1g3

12+ 00:25 1.014.978 40.878 +0,59 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7c5 Rg1g4 Rc8c7 d3d4 Qc5xd4 e4e5
12+ 00:34 1.375.989 40.863 +0,74 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7c5 Rg1g4 Rc8c7 d3d4 Qc5c4 f6xg7 Rf7xg7 Rg4xg7+ Rc7xg7 Rh6xd6 Qc4f1 d4d5 Bb7c8 Rd6d8+ Kg8h7 Rd8xc8 Rg7g2 Rc8xc3 Rg2xc2 Rc3xc2 Qf1f4 Rc2c4
12 00:35 1.420.186 41.331 +0,69 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7c5 Rg1g4 Rc8c7 d3d4 Qc5c4 e4e5 Bb7e4 Rg4xe4 g7xh6 e5e6 Rf7xf6 e6e7 Rc7xe7 Re4xe7 Kg8f8 Re7h7 Qc4d5 Rh7h8+ Kf8e7 Qc2e2+ Rf6e6 Qe2g4

13+ 00:47 2.007.692 42.433 +0,81 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Bb7a6 f6xg7 Rf7xg7 Rg1xg7+ Qc7xg7 Rh6g6
13+ 00:53 2.189.909 41.403 +0,96 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Qe2c2 Qc7c5 Rg1g4 Rc8c7 d3d4 Qc5c4 e4e5 Bb7e4 Rg4xe4 g7xh6 e5e6 Rf7xf6 e6e7 Rc7xe7 Re4xe7 Kg8f8 Re7h7 Qc4e6 Rh7a7 Rf6f5 Qc2g2
13+ 01:04 2.596.416 40.847 +1,36 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Qe2c2 Qc7c5 Rg1g4 Rc8c7 d3d4 Qc5c4 e4e5 Bb7e4 Rg4xe4 g7xh6 e5e6 Rf7xf6 e6e7 Rc7xe7 Re4xe7 Kg8f8 Re7h7 Qc4e6 Rh7a7 Rf6f5 Qc2g2
13 01:34 3.907.533 41.486 +1,84 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 Bb7a6 Rg6xg7+ Kg8h8 Qe2g4 Ba6xd3+ Kb1a1 Qb6xg1+ Qg4xg1 Rf7xf6 Qg1g5 Rf6f1+ Nb3c1 Rf1xc1+ Qg5xc1 Kh8xg7 Qc1g5+ Kg7f7 Qg5f5+ Kf7e7 Qf5xc8

14+ 02:18 5.637.271 40.812 +1,96 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 Bb7a6 Rg6xg7+ Kg8h8 Qe2g4 Ba6xd3+ Kb1a1
14+ 02:51 6.790.690 39.707 +2,11 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 Bb7a6 Rg6xg7+ Kg8h8 Qe2g4 Ba6xd3+ Kb1a1
14+ 04:04 9.555.769 39.240 +2,51 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 Bb7a6 Rg6xg7+ Kg8h8 Qe2g4 Ba6xd3+ Kb1a1
14 05:30 13.057.581 39.602 +2,71 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 Rc8c7 f6xg7 Rf7xg7 Qe2g4 c3c2+ Kb1c1 Qb6e3+ Nb3d2 Qe3d4 Qg4e6+ Kg8f8 Rg1f1+ Rg7f7 Rf1xf7+ Rc7xf7 Qe6xd6+ Qd4xd6 Rg6xd6 Rf7c7 Rd6b6

15 07:09 17.184.638 40.031 +2,69 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 Rc8c7 f6xg7 Rf7xg7 Qe2g4 c3c2+ Kb1c1 Qb6e3+ Nb3d2 Qe3d4 Qg4e6+ Kg8f8 Rg1f1+ Rg7f7 Rf1xf7+ Rc7xf7 Qe6xd6+ Qd4xd6 Rg6xd6 Rf7c7 Rd6b6
15 08:00 19.550.676 40.746 +2,69 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 Rc8c7 f6xg7 Rf7xg7 Qe2g4 c3c2+ Kb1c1 Qb6e3+ Nb3d2 Qe3d4 Qg4e6+ Kg8f8 Rg1f1+ Rg7f7 Rf1xf7+ Rc7xf7 Qe6xd6+ Qd4xd6 Rg6xd6 Rf7c7 Rd6b6

I stopped the analysis after eight minutes. No TB hits were shown by Arena.

-----------------------

Spark could not miss this move. Analysis by Spark 1.0 w32 (using two cores) in an Intel Pentium D930, with 512 MB of hash, running under Arena 2.0.1 GUI:

FEN: 2r4k/1bq2rp1/3p2Rp/p3pP1P/np1NP3/3PQ3/PP6/1KN3R1 w - - 0 1

Spark-1.0-win32-mp:

1 00:00 7 0 -2,08 a2a3 e5xd4 Qe3xd4
1 00:00 147 0 -0,77 f5f6

2/1 00:00 465 0 -0,61 f5f6 e5xd4 f6xg7+ Rf7xg7 Qe3xh6+ Rg7h7

3/3 00:00 907 0 -1,50 f5f6 e5xd4 f6xg7+ Kh8g8 Qe3xd4 Qc7c2+ Kb1a1
3/7 00:00 1.895 0 -0,20 Rg6xh6+ Kh8g8 Nc1e2 e5xd4 Ne2xd4

4/7 00:00 2.694 0 -0,20 Rg6xh6+ Kh8g8 Nc1e2 e5xd4 Ne2xd4

5/10 00:00 4.637 0 -0,11 Rg6xh6+ Kh8g8 Nc1e2 e5xd4 Ne2xd4 Bb7a6

6/15 00:00 10.642 0 -0,24 Rg6xh6+ Kh8g8 Nc1e2 e5xd4 Ne2xd4 Bb7a6 Rh6g6

7/17 00:00 26.782 0 -0,28 Rg6xh6+ Kh8g8 Nc1e2 e5xd4 Ne2xd4 Bb7a6 Qe3d2 Qc7c5 Qd2e3

8/17- 00:00 55.526 0 -0,53 Rg6xh6+ Kh8g8 Nc1e2 e5xd4 Ne2xd4 Bb7a6 Qe3d2 Qc7c5 Qd2e3
8/17- 00:00 98.361 697.595 -0,78 Rg6xh6+ Kh8g8 Nc1e2 e5xd4 Ne2xd4 Bb7a6 Qe3d2 Qc7c5 Qd2e3
8/17 00:00 135.599 788.366 -1,31 Rg6xh6+ Kh8g8 Nc1e2 e5xd4 Ne2xd4 d6d5 Rh6e6 Qc7h2 Nd4e2 Rf7c7

9/22+ 00:00 181.282 827.771 -1,06 Rg6xh6+ Kh8g8
9/22+ 00:00 184.796 843.817 -0,81 Rg6xh6+ Kh8g8
9/22 00:00 252.831 851.282 -1,12 Rg6xh6+ Kh8g8 Qe3d2 e5xd4 Rh6g6 Na4c5 h5h6 Nc5xe4 d3xe4 Bb7xe4+ Nc1d3

10/22+ 00:00 336.542 897.445 -0,87 Rg6xh6+ Kh8g8
10/22+ 00:00 352.324 901.084 -0,62 Rg6xh6+ Kh8g8
10/22 00:00 377.321 929.362 -0,58 Rg6xh6+ Kh8g8 Qe3d2 e5xd4 Rh6g6 Na4c5 h5h6 Nc5xe4 d3xe4 Bb7xe4+ Nc1d3 Be4xd3+ Qd2xd3

11/27+ 00:00 614.296 936.426 -0,33 Rg6xh6+ Kh8g8
11/27 00:00 703.518 918.430 -0,28 Rg6xh6+ Kh8g8 Qe3d2 e5xd4 Rh6g6 Kg8h8 h5h6 d6d5 h6xg7+ Kh8g8 Nc1e2 d5xe4 Ne2xd4 e4xd3 Qd2xd3

12/27 00:01 1.059.557 982.891 -0,08 Rg6xh6+ Kh8g8 Qe3d2 e5xd4 Rh6g6 Na4c5 h5h6 Nc5xe4 d3xe4 Bb7xe4+ Nc1d3 Be4xf5 Rg6xg7+ Kg8h8 Rg7g3 Qc7c4 b2b3 Bf5xd3+ Rg3xd3
12/28+ 00:01 1.521.209 1.035.540 -0,03 f5f6 e5xd4
12/28+ 00:01 1.699.439 1.045.808 +0,22 f5f6 e5xd4
12/28 00:02 2.113.574 1.032.522 +0,33 f5f6 e5xd4 Qe3d2 Rc8g8 Qd2g2 Rg8d8 f6xg7+ Kh8g8 Qg2d2 Rd8d7 Qd2xh6 Rf7xg7 Nc1e2

13/28+ 00:02 2.617.385 1.040.296 +0,58 f5f6 e5xd4
13/30 00:03 3.523.903 1.044.119 +0,64 f5f6 e5xd4 Qe3d2 Na4c3+ Kb1a1 Nc3xe4 d3xe4 g7xf6 Qd2xh6+ Rf7h7 Qh6f4 Qc7e7 Rg6xf6 Bb7xe4 h5h6 a5a4 Rf6xd6

14/30 00:04 4.923.842 1.079.079 +0,66 f5f6 e5xd4 Qe3d2 Na4c3+ Kb1a1 Nc3xe4 d3xe4 g7xf6 Qd2xh6+ Rf7h7 Qh6f4 Qc7e7 Rg6xf6 Bb7xe4 h5h6 a5a4 Nc1e2 d4d3
15/32+ 00:07 7.941.394 1.090.701 +0,91 f5f6 e5xd4

15/32 00:07 9.006.062 1.132.410 +0,93 f5f6 e5xd4 Qe3d2 Na4c3+ Kb1a1 Nc3xe4 d3xe4 g7xf6 Qd2xh6+ Rf7h7 Qh6f4 Qc7e7 Rg6xf6 Bb7xe4 h5h6 a5a4 Nc1e2 d4d3 Ne2d4

16/35 00:11 13.879.371 1.165.745 +1,02 f5f6 e5xd4 Qe3d2 Na4c3+ Kb1a1 Nc3xe4 d3xe4 g7xf6 Qd2xh6+ Rf7h7 Qh6f4 Qc7e7 Qf4g4 Qe7f7 Nc1b3 d4d3 Qg4f5 a5a4 Rg6xf6 Rh7g7

17/39 00:33 37.221.048 1.100.791 +1,04 f5f6 e5xd4 Qe3f2 d6d5 f6xg7+ Kh8g8 Qf2d2 Qc7f4 Rg6xh6 Rc8xc1+ Kb1xc1 Qf4xd2+ Kc1xd2 Rf7xg7 Rg1xg7+ Kg8xg7 Rh6d6 d5xe4 Rd6d7+ Kg7h6 Rd7xb7 e4e3+ Kd2e2 Na4xb2

18/40 00:48 53.475.283 1.110.090 +1,04 f5f6 e5xd4 Qe3f2 d6d5 f6xg7+ Kh8g8 Qf2d2 Qc7f4 Rg6xh6 Rc8xc1+ Kb1xc1 Qf4xd2+ Kc1xd2 Rf7xg7 Rg1xg7+ Kg8xg7 Rh6d6 d5xe4 Rd6d7+ Kg7h6 Rd7xb7 e4e3+ Kd2e2 Na4xb2

19/46+ 01:29 100.386.354 1.115.986 +1,29 f5f6 e5xd4
19/46+ 01:40 113.585.897 1.129.679 +1,54 f5f6 e5xd4
19/46 01:58 135.581.440 1.141.440 +1,59 f5f6 e5xd4 Qe3f2 d6d5 f6xg7+ Kh8g8 Qf2d2 Na4c3+ Kb1a1 Nc3d1 Qd2xd1 Qc7f4 e4e5 Qf4xe5 Rg6xh6 Rf7xg7 Rg1xg7+ Kg8xg7 Qd1g1+ Kg7f8 Nc1b3 Rc8c6 Rh6h7

20/46 03:18 222.156.788 1.116.539 +1,64 f5f6 e5xd4 Qe3f2 d6d5 Qf2g2 Na4c3+ b2xc3 b4xc3 Kb1a1 c3c2 f6xg7+ Rf7xg7 Nc1e2 Rg7xg6 Qg2xg6 c2c1Q+ Rg1xc1 Qc7g7 Rc1xc8+ Bb7xc8 Qg6e8+ Qg7g8 Qe8e5+ Kh8h7 e4xd5 Qg8g4 d5d6 Bc8d7
20/46+ 04:11 278.811.653 1.108.731 +1,84 Rg6xh6+ Kh8g8
20/46+ 04:24 294.974.578 1.116.469 +2,09 Rg6xh6+ Kh8g8
20/46 05:06 338.473.549 1.103.360 +2,47 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Kb1c2 Qc7c5 Rh6g6 Rc8c7 h5h6 Rf7xf6 Rg6xg7+ Rc7xg7 Rg1xg7+ Kg8f8 Rg7xb7 Rf6f2 h6h7 Rf2xe2+ Nc1xe2 Qc5h5 h7h8Q+ Qh5xh8 Rb7b8+ Kf8g7 Rb8xh8 Kg7xh8

21/51+ 06:17 411.846.046 1.090.439 +2,72 Rg6xh6+ Kh8g8
21/52+ 07:10 466.928.236 1.085.523 +2,97 Rg6xh6+ Kh8g8
21/52+ 08:49 560.747.767 1.059.732 +3,97 Rg6xh6+ Kh8g8
21/53 12:28 762.396.328 1.018.161 +5,18 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 b4xc3 Nc1b3 a5a4 f6xg7 Rf7xg7 Rg1xg7+ Qc7xg7 Rh6g6 a4xb3 a2xb3 Bb7a6 Rg6xg7+ Kg8xg7 Qe2f2 Kg7h6 Qf2xd4 Kh6xh5 Qd4xd6 c3c2+ Kb1c1 Ba6b7 Qd6e5+ Kh5g6 Qe5f5+ Kg6h6 Qf5f6+ Kh6h7
21/53 14:00 855.906.150 1.018.746 +5,18 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 b4xc3 Nc1b3 a5a4 f6xg7 Rf7xg7 Rg1xg7+ Qc7xg7 Rh6g6 a4xb3 a2xb3 Bb7a6 Rg6xg7+ Kg8xg7 Qe2f2 Kg7h6 Qf2xd4 Kh6xh5 Qd4xd6 c3c2+ Kb1c1 Ba6b7 Qd6e5+ Kh5g6 Qe5f5+ Kg6h6 Qf5f6+ Kh6h7

I stopped the analysis after fourteen minutes.

-----------------------

Quazar also finds Rxh6. Analysis by Quazar 0.4 w32 (single core) in an Intel Pentium D930, with 512 MB of hash, running under Arena 2.0.1 GUI:

FEN: 2r4k/1bq2rp1/3p2Rp/p3pP1P/np1NP3/3PQ3/PP6/1KN3R1 w - - 0 1

Quazar_0.4_w32:

1 00:01 15 11 -2,04 Nc1e2 e5xd4 Ne2xd4

2 00:01 64 50 -2,04 Nc1e2 e5xd4 Ne2xd4

3 00:01 145 114 -2,04 Nc1e2 e5xd4 Ne2xd4

4 00:01 300 236 -2,04 Nc1e2 e5xd4 Ne2xd4 d6d5

5 00:01 615 485 -1,95 Nc1e2 e5xd4 Ne2xd4 d6d5 e4e5 Rf7e7

6 00:01 2.019 1.574 -1,49 Nc1e2 e5xd4 Ne2xd4 d6d5 f5f6 g7xf6 Qe3xh6+ Rf7h7

7 00:01 4.932 3.756 -1,19 Rg6xh6+ Kh8g8 Nc1e2 d6d5 Rg1g2 e5xd4 Ne2xd4 Qc7c5

8 00:01 14.983 10.419 -0,69 Nc1b3 e5xd4 Nb3xd4 d6d5 f5f6 Qc7h2 Rg6g2 Qh2xh5 Rg2xg7 Rf7xg7 Rg1xg7

9 00:01 17.479 11.898 -0,67 Nc1b3 e5xd4 Nb3xd4 d6d5 f5f6 g7xf6 Qe3xh6+ Rf7h7 Rg6xf6 Rh7xh6 Rf6xh6+ Qc7h7 Rh6xh7+ Kh8xh7

10 00:01 28.170 17.496 -0,68 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7e7 f5f6 Qc7xe5 Qe3xe5 Re7xe5 f6xg7+ Kh8g8 Rg6xh6 Kg8f7

11 00:01 55.266 28.980 -0,28 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7e7 f5f6 Qc7xe5 Qe3xe5 Re7xe5 f6xg7+ Kh8g8 Rg6xh6 Re5e8 Rh6h8+ Kg8f7 Rh8xe8 Rc8xe8

12+ 00:02 65.610 32.544 -0,20 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7e7 f5f6 Qc7xe5 Qe3xe5 Re7xe5 f6xg7+ Kh8g8 Rg6xh6 Re5e8 Rh6h8+ Kg8f7 Rh8xe8 Rc8xe8 Rg1c1
12- 00:02 68.657 33.540 -0,36 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7e7 f5f6 Qc7xe5 Qe3xe5 Re7xe5 f6xg7+ Kh8g8 Rg6xh6 Re5e8 Rh6h8+ Kg8f7 Rh8xe8 Rc8xe8 Rg1c1
12- 00:02 70.876 34.355 -0,49 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7e7 f5f6 Qc7xe5 Qe3xe5 Re7xe5 f6xg7+ Kh8g8 Rg6xh6 Re5e8 Rh6h8+ Kg8f7 Rh8xe8 Rc8xe8 Rg1c1
12+ 00:02 81.367 37.187 -0,12 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7e7 f5f6 Qc7xe5 Qe3xe5 Re7xe5 f6xg7+ Kh8g8 Rg6xh6 Re5e8 Rh6h8+ Kg8f7 g7g8Q+ Re8xg8 Rh8h7+ Kf7f6 Rg1xg8
12 00:02 100.868 41.373 0,00 Nc1b3 e5xd4 Nb3xd4 Kh8h7 Kb1a1 Kh7h8 Ka1b1

13- 00:02 123.516 44.655 -0,08 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7xf5 Rg6xh6+ g7xh6 Qe3xh6+ Qc7h7 Qh6xh7+ Kh8xh7 Nd4xf5 Kh7h8 Rg1g7 Bb7a6
13- 00:02 126.404 45.436 -0,16 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7xf5 Rg6xh6+ g7xh6 Qe3xh6+ Qc7h7 Qh6xh7+ Kh8xh7 Nd4xf5 Kh7h8 Rg1g7 Bb7a6
13- 00:02 131.723 46.826 -0,46 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7xf5 Rg6xh6+ g7xh6 Qe3xh6+ Qc7h7 Qh6xh7+ Kh8xh7 Nd4xf5 Kh7h8 Rg1g7 Bb7a6
13- 00:02 143.055 48.957 -0,73 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7xf5 Rg6xh6+ g7xh6 Qe3xh6+ Qc7h7 Qh6xh7+ Kh8xh7 Nd4xf5 Bb7a6 Rg1g7+ Kh7h8
13+ 00:03 164.379 51.320 +0,08 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7xf5 Rg6xg7 Rf5f1+ Rg1xf1 Qc7xg7 Rf1f6 Kh8h7 Nd4f5
13 00:03 175.813 52.325 -0,01 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Qc7e7 f5f6 g7xf6 Rg6xh6+ Rf7h7 Rg1g6 Bb7a6 Rg6xf6 Na4c5 Rf6xa6 Nc5xa6 Rh6xa6 Rh7xh5

14+ 00:03 216.362 54.733 +0,06 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Qc7e7 f5f6 g7xf6 Rg6xh6+ Rf7h7 Rg1g6 Bb7a6 Rg6xf6 Na4c5 Rf6xa6 Nc5xa6 Rh6xa6 Rh7xh5 Ra6h6+ Rh5xh6 Qe3xh6+ Kh8g8 Qh6g6+
14 00:04 224.874 55.772 -0,01 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Qc7e7 f5f6 g7xf6 Rg6xh6+ Rf7h7 Rg1g6 Bb7a6 Rg6xf6 Na4c5 Rf6xa6 Nc5xa6 Rh6xa6 Rh7xh5 Ra6h6+ Rh5xh6 Qe3xh6+ Kh8g8 Qh6g6+ Kg8h8 Nd4c6 Rc8xc6

15+ 00:04 246.745 57.422 +0,06 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Qc7e7 f5f6 g7xf6 Rg6xh6+ Rf7h7 Rg1g6 Bb7a6 Rg6xf6 Na4c5 Rh6xh7+ Qe7xh7 Rf6h6 Ba6xd3+ Kb1a1
15+ 00:04 273.237 60.290 +0,14 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Qc7e7 f5f6 g7xf6 Rg6xh6+ Rf7h7 Rg1g6 Bb7a6 Rg6xf6 Na4c5 Rh6xh7+ Qe7xh7 Rf6h6 Ba6xd3+ Kb1a1
15+ 00:07 504.672 68.868 +1,13 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Qc7e7 f5f6 g7xf6 Rg6xh6+ Rf7h7 Rg1g6 Bb7a6 Rg6xf6 Na4c5 Rh6xh7+ Qe7xh7 Rf6h6 Ba6xd3+ Kb1a1
15 00:07 536.706 69.810 +0,69 Nc1b3 e5xd4 Nb3xd4 d6d5 e4e5 Rf7xf5 Rg6xg7 Qc7xg7 Nd4xf5 Qg7f8 Nf5e7 Kh8h7 Ne7xc8 Qf8xc8 Rg1g6 Qc8f8 e5e6 Na4c5

16- 00:08 607.115 70.512 +0,61 Nc1b3 e5xd4 Nb3xd4 Na4xb2 Kb1xb2 Qc7c3+ Kb2b1 Bb7a6 Rg1d1 a5a4 Rg6xd6 a4a3 Rd6xh6+ g7xh6 Qe3xh6+ Rf7h7 Qh6xa6 Qc3b2+
16- 00:08 614.529 71.117 +0,53 Nc1b3 e5xd4 Nb3xd4 Na4xb2 Kb1xb2 Qc7c3+ Kb2b1 Bb7a6 Rg1d1 a5a4 Rg6xd6 a4a3 Rd6xh6+ g7xh6 Qe3xh6+ Rf7h7 Qh6xa6 Qc3b2+
16- 00:08 642.453 72.389 +0,22 Nc1b3 e5xd4 Nb3xd4 Na4xb2 Kb1xb2 Qc7c3+ Kb2b1 Bb7a6 Rg1d1 a5a4 Rg6xd6 a4a3 Rd6xh6+ g7xh6 Qe3xh6+ Rf7h7 Qh6xa6 Qc3b2+
16 00:10 741.669 73.359 +0,64 Nc1b3 e5xd4 Nb3xd4 Na4xb2 f5f6 Nb2xd3 f6xg7+ Kh8g8 Qe3xd3 Qc7c3 Qd3xc3 b4xc3 Rg6e6 Bb7a8 Nd4b5 Rf7b7 a2a4 Rb7xg7 Rg1xg7+ Kg8xg7 Nb5xd6 c3c2+ Kb1c1 Rc8c3 Re6g6+ Kg7h7

17 00:10 781.480 74.095 +0,64 Nc1b3 e5xd4 Nb3xd4 Na4xb2 f5f6 Nb2xd3 f6xg7+ Kh8g8 Qe3xd3 Qc7c3 Qd3xc3 b4xc3 Rg6e6 Bb7a8 Nd4b5 Rf7b7 a2a4 Rb7xg7 Rg1xg7+ Kg8xg7 Nb5xd6 c3c2+ Kb1c1 Rc8c3 Re6g6+ Kg7h7

18- 00:11 846.167 75.108 +0,56 Nc1b3 e5xd4 Nb3xd4 Na4xb2 f5f6 Nb2xd3 f6xg7+ Kh8g8 Qe3xd3 Qc7c3 Qd3xc3 b4xc3 Rg6e6 Bb7a8 Nd4b5 Rf7xg7 Rg1xg7+ Kg8xg7 Re6g6+ Kg7h7 Nb5xd6 Rc8c5
18- 00:11 862.071 75.886 +0,48 Nc1b3 e5xd4 Nb3xd4 Na4xb2 f5f6 Nb2xd3 f6xg7+ Kh8g8 Qe3xd3 Qc7c3 Qd3xc3 b4xc3 Rg6e6 Bb7a8 Nd4b5 Rf7xg7 Rg1xg7+ Kg8xg7 Re6g6+ Kg7h7 Nb5xd6 Rc8c5
18- 00:11 893.102 77.031 +0,36 Nc1b3 e5xd4 Nb3xd4 Na4xb2 f5f6 Nb2xd3 f6xg7+ Kh8g8 Qe3xd3 Qc7c3 Qd3xc3 b4xc3 Rg6e6 Rf7f2 Re6xh6 Bb7xe4+ Kb1a1 Be4h7 Rh6xd6 c3c2 Rg1c1 Bh7d3 Nd4e6 Rf2f1
18+ 00:17 1.297.914 75.928 +0,72 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 d6d5 f6xg7 Rf7xg7 Rg1xg7+ Qc7xg7 Rh6g6
18+ 00:18 1.440.175 77.712 +1,00 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 d6d5 f6xg7 Rf7xg7 Rg1xg7+ Qc7xg7 Rh6g6
18+ 00:22 1.719.428 77.059 +1,40 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 d6d5 f6xg7 Rf7xg7 Rg1xg7+ Qc7xg7 Rh6g6 Qg7xg6 h5xg6 d5xe4 Nc1e2
18 00:27 2.141.164 77.331 +1,67 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7c5 Rg1g6 Qc5e5 f6xg7 Rf7xg7 Rg6xd6 a5a4 Rd6g6 Rg7xg6 Rh6xg6+ Kg8h7 Rg6b6 Qe5e7 e4e5 Rc8c6 d3d4+ Kh7h8 Rb6b5 Rc6c4

19- 00:29 2.295.730 77.045 +1,59 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7c5 Rg1g6 Qc5e5 f6xg7 Rf7xg7 Rg6xd6 a5a4 Rd6g6 Rg7xg6 Rh6xg6+ Kg8h7 Rg6b6 Qe5e7 e4e5 Rc8c6 d3d4+ Kh7h8 Rb6b5 Rc6c4
19- 00:30 2.336.726 77.405 +1,51 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7c5 Rg1g6 Qc5e5 f6xg7 Rf7xg7 Rg6xd6 Rg7f7 Rd6g6+ Kg8f8 Rg6e6 Qe5d4 e4e5 Qd4e3
19- 00:30 2.362.464 77.815 +1,39 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7c5 Rg1g6 Qc5e5 f6xg7 Rf7xg7 Rg6xd6 Rg7f7 Rd6g6+ Kg8f8 Rg6e6 Qe5d4 e4e5 Qd4e3
19 00:35 2.785.832 78.266 +1,36 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 d4xc3 Qd2c2 Qc7c5 Rg1g6 Qc5e5 f6xg7 Rf7xg7 Rg6e6 Qe5b5 Re6xd6 a5a4 Rh6g6 Rg7xg6 h5xg6 Qb5e5 Rd6b6 Qe5e7 Nc1e2 Bb7c6 Ne2d4 Qe7c5 Rb6xc6 Rc8xc6 Nd4xc6 Qc5xc6

20- 00:48 3.793.350 77.786 +1,28 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 b4xc3 Qd2c2 Bb7xe4 d3xe4 d4d3 Qc2b3 c3c2+ Kb1b2 d6d5 Rg1xg7+ Rf7xg7 Qb3xd5+ Rg7f7 Qd5g5+ Rf7g7 Qg5xg7+ Qc7xg7 f6xg7 d3d2
20- 00:49 3.847.043 78.386 +1,20 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 b4xc3 Qd2c2 Bb7xe4 d3xe4 d4d3 Qc2b3 c3c2+ Kb1b2 d6d5 f6xg7 Qc7e5+ Kb2a3 Qe5e7+
20- 00:50 3.962.385 79.098 +1,08 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 b4xc3 Qd2c2 Bb7xe4 d3xe4 d4d3 Qc2b3 c3c2+ Kb1b2 d6d5 e4xd5 Qc7e5+ Kb2a3 d3d2
20- 00:54 4.316.127 79.513 +0,62 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3d2 Na4c3+ b2xc3 b4xc3 Qd2c2 Bb7xe4 d3xe4 d4d3 Qc2b3 c3c2+ Kb1b2 d6d5 e4xd5 Qc7e5+ Kb2a3 d3d2
20+ 01:09 5.394.715 77.377 +1,44 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Rc8b8 f6xg7 Rf7xg7 Rg1xg7+ Qc7xg7 Rh6g6
20+ 01:44 7.916.314 75.946 +2,96 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Rc8b8 f6xg7 Rf7xg7 Rg1xg7+ Qc7xg7 Rh6g6
20 02:37 11.634.969 73.792 +1,66 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Qe2c2 Qc7c5 Rg1g6 Qc5e5 f6xg7 Rf7xg7 Rg6e6 Qe5b5 Re6xd6 a5a4 Rh6g6 Rg7xg6 Rd6xg6+ Kg8h7 d3d4 Qb5xh5 Rg6b6 Rc8c7 d4d5 Bb7c8 Rb6xb4 Bc8d7 d5d6 Rc7c5 a2a3 Qh5e5

21+ 03:04 13.847.665 74.985 +1,74 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 d6d5 Qe2g4 d5xe4 f6xg7 Rf7xg7 Qg4e6+ Qc7f7 Rg1xg7+ Kg8xg7 Rh6g6+
21+ 03:09 14.379.493 75.906 +1,82 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 d6d5 Qe2g4 d5xe4 f6xg7 Rf7xg7 Qg4e6+ Qc7f7 Rg1xg7+ Kg8xg7 Rh6g6+
21+ 03:13 14.865.821 76.950 +1,94 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 a5a4 f6xg7 Rf7xg7 Rg1xg7+ Qc7xg7 Rh6g6 a4xb3 Rg6xg7+ Kg8xg7 Qe2g4+ Kg7h8 a2xb3 Bb7a6
21+ 03:17 15.399.359 78.020 +2,13 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 a5a4 f6xg7 Rf7xg7 Rg1xg7+ Qc7xg7 Rh6g6 a4xb3 Rg6xg7+ Kg8xg7 Qe2g4+ Kg7h8 a2xb3 Bb7a6 Qg4e2 c3c2+ Kb1c1 Rc8c3 Qe2e3 Rc3xd3 Qe3h6+ Kh8g8 Kc1xc2 Rd3f3 Qh6xd6 Ba6d3+ Kc2c1
21+ 03:22 16.024.291 79.150 +2,40 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 a5a4 f6xg7 Rf7xg7 Rg1xg7+ Qc7xg7 Rh6g6 a4xb3 Rg6xg7+ Kg8xg7 Qe2g4+ Kg7h8 a2xb3 Bb7a6 Kb1c2 Rc8f8
21+ 03:31 16.893.407 80.051 +2,81 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Qc7b8 f6xg7 Rc8xc1+ Kb1xc1 Rf7xg7 Rg1xg7+ Kg8xg7 Qe2g4+
21 03:35 17.374.859 80.537 +2,63 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 a5a4 Rg6xg7+ Rf7xg7 Rg1xg7+ Kg8h8 Qe2g2 c3c2+ Kb1c1 Qb6e3+ Qg2d2 Qe3xd2+ Nb3xd2 Bb7a6 d3d4 Ba6d3 h5h6 b4b3 a2xb3 a4xb3 Nd2xb3 Bd3xe4 Nb3d2 Be4f5 d4d5 Bf5d3

22+ 04:10 20.274.481 80.809 +2,71 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 a5a4 Rg6xg7+ Rf7xg7 Rg1xg7+ Kg8h8 Qe2g2 c3c2+ Kb1c1 Qb6e3+ Qg2d2 Qe3xd2+ Nb3xd2 Bb7a6 d3d4 Ba6d3 h5h6 b4b3 a2xb3 a4xb3 Nd2xb3 Bd3xe4
22+ 04:21 21.467.749 82.089 +2,79 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 Bb7a8 Rg6xg7+ Rf7xg7 Rg1xg7+ Kg8h8 Rg7g6 Kh8h7 f6f7 c3c2+ Kb1c1 a5a4 Qe2g2
22+ 04:31 22.592.100 83.317 +2,91 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 Bb7a8 Rg6xg7+ Rf7xg7 Rg1xg7+ Kg8h8 Rg7g6 Kh8h7 f6f7 c3c2+ Kb1c1 a5a4 Qe2g2
22 04:38 23.311.913 83.681 +2,90 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 c3c2+ Kb1c1 Rc8c7 f6xg7 Rf7xg7 Qe2g4 Qb6e3+ Nb3d2 Qe3d4 Qg4e6+ Kg8f8 Rg1f1+ Rc7f7 Rf1xf7+ Rg7xf7 Qe6xd6+ Qd4xd6 Rg6xd6 Rf7c7 h5h6 Kf8g8 Nd2b3 a5a4 Nb3d4 Bb7c8 Rd6b6 Rc7c3 Rb6xb4 Bc8a6 Nd4e2 Rc3a3 Kc1b2 Ba6xd3 Kb2xa3 Bd3xe2

23+ 05:44 28.652.081 83.166 +2,98 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 c3c2+ Kb1c1 Rc8c7 f6xg7 Rf7xg7 Qe2g4 Qb6e3+ Nb3d2 Qe3d4 Qg4e6+ Kg8f8 Rg1f1+ Rc7f7 Rf1xf7+ Rg7xf7 Qe6xd6+ Qd4xd6 Rg6xd6 Rf7c7 h5h6 Kf8g8 Nd2b3 a5a4 Nb3d4 Bb7c8 Rd6b6 Rc7c3 Rb6c6 Rc3xc6 Nd4xc6 Kg8h7 Kc1xc2 Kh7xh6 Nc6xb4 Bc8g4 Nb4d5
23 05:50 29.089.054 83.026 +2,96 Rg6xh6+ Kh8g8 f5f6 e5xd4 Qe3e2 Na4c3+ b2xc3 d4xc3 Nc1b3 Qc7b6 Rh6g6 c3c2+ Kb1c1 Rc8c7 f6xg7 Rf7xg7 Qe2g4 Qb6e3+ Nb3d2 Qe3d4 Qg4e6+ Kg8f8 Rg1f1+ Rc7f7 Rf1xf7+ Rg7xf7 Qe6xd6+ Qd4xd6 Rg6xd6 Rf7c7 h5h6 Kf8g8 Nd2b3 a5a4 Nb3d4 b4b3 a2xb3 a4a3 b3b4 a3a2 Nd4b3 Rc7c3 Nb3a1 Bb7c6 e4e5 Bc6a4 e5e6 Ba4b5 e6e7

I stopped the analysis after seven minutes.

-----------------------

Another interesting position. Thanks for sharing it, Jon!

Regards from Spain.

Ajedrecista.

[zullil]

[d] 2r4k/1bq2rp1/3p2Rp/p3pP1P/np1NP3/3PQ3/PP6/1KN3R1 w - -

bm Rxh6+. This was the move played in the game, and I think it is best.

--Jon

Critter has stuck with f6 for a long time, though the search is ongoing:
...

2 or 3 best moves variations should help to see more clearly in the Critter's eval and best lines ...

Yes, with MultiPV=3 Critter finds Rxh6 easily. Will try another standard search now.

Code: Select all

14/47  00:10   45771K   4163K  +0.73 Rxh6+ Kg8 f6 exd4 Qe2 Nc3+ bxc3 dxc3 Kc2 Qc5 Rxg7+ Rxg7 fxg7 Rc7 Re6 Rxg7 h6 Rf7 Qg2+ Kf8 Rf6 Qh5 Qg7+ Ke8 Rxf7 Qxf7 Qxf7+ Kxf7 Nb3
15/47  00:11   47591K   4182K  +1.16 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 Qg4 Qf8 Nb3 d3 Nxa5 d2 Nb3 d1=N Rxd1 Re8 Qf4 Rxe4 Qf2 Rf7 Nd4 Re5 Nf5 Rd7 Rdg1 Be4 Rh6+ Rh7
14/47  00:11   47591K   4182K  +1.27 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 Qg4 Qf8 Nb3 d3 Nxa5 d2 Nb3 d5 exd5 Bxd5 Rxf6 Bf7 Nxd2 Qc5 Rh6 Qxg1+ Qxg1 Rxh6 Qd4+ Kh7 Qe4+ Kh8
14/47  00:11   47591K   4182K  +0.73 Rxh6+ Kg8 f6 exd4 Qe2 Nc3+ bxc3 dxc3 Kc2 Qc5 Rxg7+ Rxg7 fxg7 Rc7 Re6 Rxg7 h6 Rf7 Qg2+ Kf8 Rf6 Qh5 Qg7+ Ke8 Rxf7 Qxf7 Qxf7+ Kxf7 Nb3
15/47  00:11   48438K   4215K  +1.16 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 Qg4 Qf8 Nb3 d3 Nxa5 d2 Nb3 d1=N Rxd1 Re8 Qf4 Rxe4 Qf2 Rf7 Nd4 Re5 Nf5 Rd7 Rdg1 Be4 Rh6+ Rh7
15/47  00:11   48438K   4215K  +1.16 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 Qg4 Qf8 Nb3 d3 Nxa5 d2 Nb3 d1=N Rxd1 Re8 Qf4 Rxe4 Qf2 Rf7 Nd4 Re5 Nf5 Rd7 Rdg1 Be4 Rh6+ Rh7
14/47  00:11   48438K   4215K  +0.73 Rxh6+ Kg8 f6 exd4 Qe2 Nc3+ bxc3 dxc3 Kc2 Qc5 Rxg7+ Rxg7 fxg7 Rc7 Re6 Rxg7 h6 Rf7 Qg2+ Kf8 Rf6 Qh5 Qg7+ Ke8 Rxf7 Qxf7 Qxf7+ Kxf7 Nb3
15/58  00:25  173324K   6864K  +3.29 Rxh6+ Kg8 f6 exd4 Qe2 b3 Nxb3 Bxe4 dxe4 Qc4 Qxc4 Rxc4 Rhg6 d3 Rxg7+ Rxg7 Rxg7+ Kh8 Rg3 Kh7 f7 Rc8 Rxd3 Rf8 Rxd6 Rxf7 Rd4 Rf1+ Kc2 Rf2+ Rd2 Rxd2+ Nxd2 Kh6 e5 Nc5 Nc4
15/58  00:25  173324K   6864K  +1.16 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 Qg4 Qf8 Nb3 d3 Nxa5 d2 Nb3 d1=N Rxd1 Re8 Qf4 Rxe4 Qf2 Rf7 Nd4 Re5 Nf5 Rd7 Rdg1 Be4 Rh6+ Rh7
15/58  00:25  173324K   6864K  +1.16 Qd2 Nc3+ Ka1 exd4 f6 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 Qg4 Qf8 Nb3 d3 Nxa5 d2 Nb3 d1=N Rxd1 Re8 Qf4 Rxe4 Qf2 Rf7 Nd4 Re5 Nf5 Rd7 Rdg1 Be4 Rh6+ Rh7
16/60  00:29  207054K   7088K  +3.56 Rxh6+ Kg8 f6 exd4 Qe2 Bxe4 dxe4 Nc3+ bxc3 bxc3 Qd3 c2+ Kb2 Qb7+ Qb3 d5 fxg7 Qxb3+ axb3 Rxg7 Rxg7+ Kxg7 Rg6+ Kf7 e5 Rc5 e6+ Ke7 h6 Rc3 h7 Rh3 Rg7+ Kxe6 Kxc2 Kf6 Rc7
15/60  00:29  207054K   7088K  +1.16 f6 exd4 Qd2 Nc3+ Ka1 Nxe4 dxe4 gxf6 Qxh6+ Rh7 Qf4 Qe7 Qg4 Qf8 Nb3 d3 Nxa5 d2 Nb3 d1=N Rxd1 Re8 Qf4 Rxe4 Qf2 Rf7 Nd4 Re5 Nf5 Rd7 Rdg1 Be4 Rh6+ Rh7

[kgburcham]

[d] 2r4k/1bq2rp1/3p2Rp/p3pP1P/np1NP3/3PQ3/PP6/1KN3R1 w - - 0 1

Deep Junior 13.3:

1.Rxh6+ Kg8 2.Nce2 exd4 3.Nxd4
=/+ (-0.63) Depth: 12 00:00:00 671kN
1.Rxh6+
= (-0.21) Depth: 15 00:00:00 2861kN
1.Rxh6+ Kg8 2.Nce2 exd4 3.Nxd4 Nxb2 4.f6 Nxd3 5.fxg7 Rxg7
= (0.00) Depth: 15 00:00:01 15742kN
1.Rxh6+
+/= (0.42) Depth: 18 00:00:04 57991kN
1.Qd2
+/= (0.43) Depth: 18 00:00:05 77794kN
1.Qd2 Nc3+ 2.Ka1 exd4 3.f6 Nxe4 4.dxe4 gxf6 5.Qxh6+ Rh7 6.Qf4 Qe7 7.Nb3 d3 8.Qf5 Re8 9.Nd2 Bc8
+/= (0.61) Depth: 18 00:00:14 206mN
1.Qd2 Nc3+ 2.Ka1 exd4 3.f6 Nxe4 4.dxe4 gxf6 5.Qxh6+ Rh7 6.Qf4 Qe7 7.Qg4 Qf7 8.h6 Qc4 9.Nb3 Rhc7
+/- (0.89) Depth: 20 00:00:18 263mN
1.Rxh6+
+/- (1.03) Depth: 20 00:00:24 332mN
1.Rxh6+ Kg8 2.f6 exd4 3.Qe2 Nc3+ 4.bxc3 bxc3 5.Nb3 a4 6.fxg7 Rxg7 7.Rxg7+ Qxg7 8.Rg6 Qxg6 9.hxg6 axb3
+- (2.02) Depth: 20 00:00:44 636mN
1.Rxh6+ Kg8 2.f6 exd4 3.Qe2 Nc3+
+- (2.02) Depth: 21 00:00:48 688mN
1.Rxh6+
+- (2.44) Depth: 22 00:00:59 827mN
1.Rxh6+ Kg8 2.f6 exd4 3.Qe2 Nc3+ 4.bxc3 bxc3 5.Nb3 a4 6.fxg7 Rxg7 7.Rxg7+ Qxg7 8.Rg6 Qxg6 9.hxg6 axb3
+- (3.15) Depth: 22 00:01:49 1529mN
1.Rxh6+ Kg8 2.f6 exd4 3.Qe2 Nc3+
+- (3.15) Depth: 23 00:02:02 1707mN

[jdart]

Yes, with MultiPV=3 Critter finds Rxh6 easily. Will try another standard search now.

I see a similar strange behavior with Houdini 1.5. In single-var mode, it does not play Rxh6 for a long time. If I search in multi-PV mode, then I do get Rxh6 to fail high after a while with a score of +2.78 (f6 has about +2). But then If I force Rxh6+ I immediately get a score over +5.

--Jon

[bob]

Yes, with MultiPV=3 Critter finds Rxh6 easily. Will try another standard search now.

I see a similar strange behavior with Houdini 1.5. In single-var mode, it does not play Rxh6 for a long time. If I search in multi-PV mode, then I do get Rxh6 to fail high after a while with a score of +2.78 (f6 has about +2). But then If I force Rxh6+ I immediately get a score over +5.

--Jon

Doesn't seem strange to me. Many programs are searching the PV differently than the non-PV branches. Since alpha/beta window has to be wide to include the scores, that changes everything about pruning, reducing, etc...

You must, by definition, search a much larger tree in multi-PV mode. And in doing so, you see more at the same time. At the cost of greatly increasing the computational workload to search the same depth.

[gleperlier]

Seems Hannibal and Komodo don't find it quickly

Analysis by Hannibal 1.2:

1.Dd2 exd4 2.f6 Cc3+ 3.Ra1 Cxe4 4.dxe4 gxf6 5.Dxh6+ Th7 6.Df4 De7 7.Dg4 Df8 8.Cb3 d3 9.Cxa5 d2 10.Cb3 d1D+ 11.Txd1 Te8 12.Cd2 b3 13.Tf1 Tf7 14.h6 bxa2 15.Rxa2 De7 16.Tg1 De6+ 17.Dxe6 Txe6
+- (1.73) Profondeur: 26 00:06:58 601mN

Analysis by Komodo64 SSE Version 4:

1.Dd2 exd4
+/- (1.30) Profondeur: 26 00:07:04 422mN