Food for thought ( engines)

Discussion of chess software programming and technical issues.

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neelbasant
Posts: 226
Joined: Sun Apr 01, 2012 7:57 pm

Food for thought ( engines)

Post by neelbasant »

Here is the position where engines might fail..

r1b2rk1/2q1bppp/pp2p3/2npP3/1n3P1P/2NBBN2/PPPQ2P1/1K1R3R w - - 0 14



Find the winning line for white.

Neel
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Dann Corbit
Posts: 12542
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Food for thought ( engines)

Post by Dann Corbit »

[d]r1b2rk1/2q1bppp/pp2p3/2npP3/1n3P1P/2NBBN2/PPPQ2P1/1K1R3R w - -

When there is a tricky chess position, the first thing engines should try is Bxh7
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Food for thought ( engines)

Post by Vinvin »

Dann Corbit wrote:[d]r1b2rk1/2q1bppp/pp2p3/2npP3/1n3P1P/2NBBN2/PPPQ2P1/1K1R3R w - -

When there is a tricky chess position, the first thing engines should try is Bxh7
Bxh7 seems not especially good, g4, h5 and Bd4 seem better :

Code: Select all

Stockfish_160712_x64_modern_matefinder:
 25/42	02:35	 1 424 204k	9 172k	 0,00	14.Bxh7+ Kxh7 15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Qg4 f5 19.Nxe6 fxg4 20.Nxc7 Ra7 21.N7xd5 Bf5 22.h5 Ne4 23.hxg6 Nxc3+ 24.Nxc3 Bxg6 25.b4 Kg7 26.Kb2 Rb7 27.Ne2 Be4 28.Rhg1 Bg6 29.Rh1
 25/42	02:35	 1 424 204k	9 172k	 0,00	14.Qf2 Bb7 15.Qg3 f5 16.exf6 Bxf6 17.Bxc5 Nxd3 18.Bxf8 Nxb2 19.Bxg7 Bxg7 20.Ne2 Nxd1 21.Rxd1 Qc5 22.Ned4 Qb4+ 23.Ka1 Qc3+ 24.Kb1 Qb4+
 25/42	02:35	 1 424 204k	9 172k	+0,07	14.Bd4 Ncxd3 15.cxd3 Rb8 16.h5 a5 17.Qe3 Qd7 18.h6 g6 19.Nh2 Ba6 20.Ng4 Rfc8 21.Nf6+ Bxf6 22.exf6 Nc6 23.Ne2 Nb4 24.Bc3 d4 25.Nxd4 Nd5 26.Qd2 Nxf6 27.Nc6 Rxc6 28.Bxf6 Rbc8 29.Bc3 Rd6 30.Rh3
 25/42	02:35	 1 424 204k	9 172k	+0,12	14.g4 Nbxd3 15.cxd3 a5 16.Bd4 Qd7 17.h5 Bb7 18.g5 Ba6 19.Qe3 Rac8 20.h6 g6 21.Nh2 b5 22.Ng4 b4 23.Bxc5 bxc3 24.d4 cxb2 25.Rd2 Kh8 26.Rxb2 Rb8 27.Bxe7 Rxb2+ 28.Kxb2 Rb8+ 29.Ka1 Qxe7 30.Rb1 Rxb1+ 31.Kxb1
 26/42	02:35	 1 424 204k	9 172k	+0,18	14.h5 Ncxd3 15.cxd3 a5 16.g4 Ba6 17.Qe2 Rad8 18.Nd4 Rc8 19.g5 Nc6 20.Ncb5 Nxd4 21.Nxd4 Bc5 22.g6 h6 23.Rhf1 Qe7 24.Qd2 Kh8 25.a3 Qd7 26.Qf2 fxg6 27.hxg6 Kg8
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Dann Corbit
Posts: 12542
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Food for thought ( engines)

Post by Dann Corbit »

See also:
http://rybkaforum.net/cgi-bin/rybkaforu ... 27072;pg=1
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.
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neelbasant
Posts: 226
Joined: Sun Apr 01, 2012 7:57 pm

Re: Food for thought ( engines)

Post by neelbasant »

Wow..
I am happy that my opening analysis is not bad at all..
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Food for thought ( engines)

Post by Vinvin »

Vinvin wrote:
Dann Corbit wrote:r1b2rk1/2q1bppp/pp2p3/2npP3/1n3P1P/2NBBN2/PPPQ2P1/1K1R3R w - -

When there is a tricky chess position, the first thing engines should try is Bxh7
Bxh7 seems not especially good, g4, h5 and Bd4 seem better :

Code: Select all

Stockfish_160712_x64_modern_matefinder:
 25/42	02:35	 1 424 204k	9 172k	 0,00	14.Bxh7+ Kxh7 15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Qg4 f5 19.Nxe6 fxg4 20.Nxc7 Ra7 21.N7xd5 Bf5 22.h5 Ne4 23.hxg6 Nxc3+ 24.Nxc3 Bxg6 25.b4 Kg7 26.Kb2 Rb7 27.Ne2 Be4 28.Rhg1 Bg6 29.Rh1
 25/42	02:35	 1 424 204k	9 172k	 0,00	14.Qf2 Bb7 15.Qg3 f5 16.exf6 Bxf6 17.Bxc5 Nxd3 18.Bxf8 Nxb2 19.Bxg7 Bxg7 20.Ne2 Nxd1 21.Rxd1 Qc5 22.Ned4 Qb4+ 23.Ka1 Qc3+ 24.Kb1 Qb4+
 25/42	02:35	 1 424 204k	9 172k	+0,07	14.Bd4 Ncxd3 15.cxd3 Rb8 16.h5 a5 17.Qe3 Qd7 18.h6 g6 19.Nh2 Ba6 20.Ng4 Rfc8 21.Nf6+ Bxf6 22.exf6 Nc6 23.Ne2 Nb4 24.Bc3 d4 25.Nxd4 Nd5 26.Qd2 Nxf6 27.Nc6 Rxc6 28.Bxf6 Rbc8 29.Bc3 Rd6 30.Rh3
 25/42	02:35	 1 424 204k	9 172k	+0,12	14.g4 Nbxd3 15.cxd3 a5 16.Bd4 Qd7 17.h5 Bb7 18.g5 Ba6 19.Qe3 Rac8 20.h6 g6 21.Nh2 b5 22.Ng4 b4 23.Bxc5 bxc3 24.d4 cxb2 25.Rd2 Kh8 26.Rxb2 Rb8 27.Bxe7 Rxb2+ 28.Kxb2 Rb8+ 29.Ka1 Qxe7 30.Rb1 Rxb1+ 31.Kxb1
 26/42	02:35	 1 424 204k	9 172k	+0,18	14.h5 Ncxd3 15.cxd3 a5 16.g4 Ba6 17.Qe2 Rad8 18.Nd4 Rc8 19.g5 Nc6 20.Ncb5 Nxd4 21.Nxd4 Bc5 22.g6 h6 23.Rhf1 Qe7 24.Qd2 Kh8 25.a3 Qd7 26.Qf2 fxg6 27.hxg6 Kg8
I ran a 6 hours analyze (6*4GHz) with 2 best lines after Bxh7+ Kxh7 and SF-MF likes white now.
The eval start to rise after 12m51s.

Code: Select all

FEN: r1b2r2/2q1bppk/pp2p3/2npP3/1n3P1P/2N1BN2/PPPQ2P1/1K1R3R w - - 0 15

Stockfish_160712_x64_modern_matefinder:
...
 32/55	02:11	 1 348 025k	10 213k	 0,00	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Qg4 f5 19.Nxe6 fxg4 20.Nxc7 Ra7 21.N7xd5 Bf5 22.g3 Ne4 23.Nxe4 Bxe4 24.Rh2 Rb7 25.Nxb6 Rfb8 26.Nc4 Bf3 27.Rd3 Na5 28.Nxa5 Rxb2+ 29.Kc1 Rb1+ 30.Kd2 Rc8 31.Bd4 Bd8 32.Nb3 Rd1+ 33.Ke3 Re1+ 34.Kd2 Rd1+
 32/55	02:11	 1 348 025k	10 213k	 0,00	15.Ng5+ Kg8 16.a3 Nc6 17.Qe2 g6 18.Qg4 f5 19.Nxe6 fxg4 20.Nxc7 Ra7 21.N7xd5 Bf5 22.g3 Ne4 23.Nxe4 Bxe4 24.Rh2 Rb7 25.Nxb6 Rfb8 26.Nc4 Bf3 27.Rd3 Na5 28.Nxa5 Rxb2+ 29.Kc1 Rb1+ 30.Kd2 Rc8 31.Bd4 Bd8 32.Nb3 Rd1+ 33.Ke3 Re1+ 34.Kd2 Rd1+
---------------------------------------------------------------------------
 33/66	12:51	 7 942 485k	10 294k	 0,00	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Qg4 f5 19.Nxe6 fxg4 20.Nxc7 Ra7 21.N7xd5 Bf5 22.g3 Ne4 23.Nxe4 Bxe4 24.Rh2 Rb7 25.Nxb6 Rfb8 26.Nc4 Bf3 27.Rd3 Na5 28.Nxa5 Rxb2+ 29.Kc1 Rb1+ 30.Kd2 Rc8 31.Bd4 Bd8 32.Nb3 Rd1+ 33.Ke3 Re1+ 34.Kd2 Rd1+
 33/66	12:51	 7 942 485k	10 294k	+0,75	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Bb7 18.Rdh1 Na4 19.Nxa4 Qc4 20.Qxc4 dxc4 21.Re1 Nd5 22.Nxb6 Nxb6 23.Bxb6 Bxg2 24.Rh2 Bd5 25.h5 Bxg5 26.fxg5 gxh5 27.Rxh5 Kg7 28.Rh4 Rfb8 29.Bc5 Rh8 30.Rf4 Rac8 31.Be7 Rh1 32.Rxh1 Bxh1 33.c3 Bd5 34.Kc2 Kg6 35.Rf6+ Kg7 36.Rh6 Be4+ 37.Kd2 Rb8 38.Bf6+ Kf8
---------------------------------------------------------------------------
 34/66	19:57	 12 266 566k	10 241k	 0,00	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Qg4 f5 19.Nxe6 fxg4 20.Nxc7 Ra7 21.N7xd5 Bf5 22.g3 Ne4 23.Nxe4 Bxe4 24.Rh2 Rb7 25.Nxb6 Rfb8 26.Nc4 Bf3 27.Rd3 Na5 28.Nxa5 Rxb2+ 29.Kc1 Rb1+ 30.Kd2 Rc8 31.Bd4 Bd8 32.Nb3 Rd1+ 33.Ke3 Re1+ 34.Kd2 Rd1+
 34/66	19:57	 12 266 566k	10 241k	+1,17	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Nd5 21.Nxe4 Bb7 22.Nf6+ Kh8 23.Nxd5 Bxd5 24.g6 Kg8 25.Bh6 Qc4 26.Qxc4 Bxc4 27.Bxf8 Rxf8 28.Rg3 fxg6 29.Rxg6+ Kh7 30.g4 Bd5 31.a4 Bc5 32.Rf6 Rg8 33.c4 Bxc4 34.Rd7+ Rg7 35.Rxg7+ Kxg7 36.Kc2 Bd5 37.Kc3 b5 38.a5 Be7 39.h6+ Kh8 40.g5 Kg8 41.Rg6+ Kh8
---------------------------------------------------------------------------
 35/72	28:15	 17 299 962k	10 203k	 0,00	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Qg4 f5 19.Nxe6 fxg4 20.Nxc7 Ra7 21.N7xd5 Bf5 22.g3 Ne4 23.Nxe4 Bxe4 24.Rh2 Rb7 25.Nxb6 Rfb8 26.Nc4 Bf3 27.Rd3 Na5 28.Nxa5 Rxb2+ 29.Kc1 Rb1+ 30.Kd2 Rc8 31.Bd4 Bd8 32.Nb3 Rd1+ 33.Ke3 Re1+ 34.Kd2 Rd1+
 35/72	28:15	 17 299 962k	10 203k	+1,38	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Nd5 21.Nxe4 Bb7 22.Nf6+ Kh8 23.Bd4 Bxf6 24.exf6 Nf4 25.Be5 Nxe2 26.Bxc7 Bxg2 27.Rh2 Bc6 28.Rxe2 Bf3 29.Ree1 Bxd1 30.Rxd1 Rg8 31.Rg1 b5 32.g6 Rgc8 33.Bd6 Kg8 34.Be7 e5 35.Rf1 a5 36.b3 e4 37.Kb2 Rc6 38.h6 Rcc8 39.h7+ Kh8 40.gxf7 Kxh7 41.Re1 Kg6
---------------------------------------------------------------------------
 36/73	42:22	 25 850 753k	10 166k	+0,24	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Rh3 d4 19.Rdh1 Ra7 20.h5 Bxg5 21.hxg6 fxg6 22.Rh8+ Kf7 23.R1h7+ Ke8 24.Rxc7 Rxc7 25.Rxf8+ Kxf8 26.fxg5 dxe3 27.Qd1 Rf7 28.Qd6+ Ne7 29.Qxb6 Ne4 30.Qxe3 Nxc3+ 31.Qxc3 Rf1+ 32.Ka2 Rf2 33.Qb3 Ke8 34.g3 Bd7 35.Qc4 Bc6 36.Kb1 Rf5 37.Qd4 Rf3 38.g4 a5 39.Qc5 Rf1+ 40.Ka2
 36/73	42:22	 25 850 753k	10 166k	+1,53	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Qxe5 21.g6 Nc6 22.Bg1 a5 23.Bh2 Qf5 24.g4 Ba6 25.Qxa6 Qxg4 26.gxf7+ Kxf7 27.Qf1+ Kg8 28.Qg1 Qxg1 29.Rxg1+ Kh7 30.Nxe4 Rf5 31.a3 Raf8 32.Rc3 Bc5 33.Nxc5 Rxc5 34.Bd6 Rxc3 35.Bxf8 Rh3 36.Rg7+ Kh8 37.Rc7 Kg8 38.Rxc6 Kxf8 39.Rxe6 Rxh5 40.Rxb6 Ke7
---------------------------------------------------------------------------
 37/78	1:10:00	 42 693 132k	10 163k	+1,01	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Rh3 Ra7 19.Rdh1 d4 20.h5 Bxg5 21.fxg5 Qxe5 22.Qf3 Qf5 23.Qxc6 Bb7 24.Qxb6 Bxg2 25.Bxd4 Rd7 26.Bxc5 Rc8 27.hxg6 Bxh3 28.gxf7+ Kxf7 29.Bd4 e5 30.g6+ Qxg6 31.Rxh3 exd4 32.Qb3+ Kg7 33.Nd5 Qxc2+ 34.Qxc2 Rxc2 35.Rg3+ Kf7 36.Rf3+ Kg7 37.Kxc2 Rxd5 38.Kd3 a5 39.Kc4 Rd7 40.b4 axb4 41.axb4 Rb7 42.b5 Rb8 43.Kc5 Rd8 44.Rd3 Kf6 45.Rxd4 Rc8+ 46.Kb4 Ke5 47.Rd3 Rb8 48.Ka5
 37/78	1:10:00	 42 693 132k	10 163k	+1,56	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nd5 22.Nxd5 Bxd5 23.Qg4 Rac8 24.h6 Qxc2+ 25.Ka1 Qxd1+ 26.Qxd1 fxg6 27.Rg3 g5 28.Bxb6 Kh7 29.Rh3 Rf5 30.Rh1 Rcf8 31.Qc1 g4 32.Be3 R8f7 33.Kb1 a5 34.Qc3 Bg5 35.Bxg5 Rxg5 36.Re1 Rgf5 37.Qg3 Rf4 38.b3 Kxh6 39.Qh4+ Kg6
---------------------------------------------------------------------------
 38/78	1:19:26	 48 480 119k	10 171k	+1,01	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Rh3 Ra7 19.Rdh1 d4 20.h5 Bxg5 21.fxg5 Qxe5 22.Qf3 Qf5 23.Qxc6 Bb7 24.Qxb6 Bxg2 25.Bxd4 Rd7 26.Bxc5 Rc8 27.hxg6 Bxh3 28.gxf7+ Kxf7 29.Bd4 e5 30.g6+ Qxg6 31.Rxh3 exd4 32.Qb3+ Kg7 33.Nd5 Qxc2+ 34.Qxc2 Rxc2 35.Rg3+ Kf7 36.Rf3+ Kg7 37.Kxc2 Rxd5 38.Kd3 a5 39.Kc4 Rd7 40.b4 axb4 41.axb4 Rb7 42.b5 Rb8 43.Rb3 Kf6 44.Kxd4 Ke6
 38/78	1:19:26	 48 480 119k	10 171k	+1,46	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nd5 22.Nxd5 Bxd5 23.Qg4 f5 24.Qf4 Rfd8 25.Rc1 Rd7 26.g7 Bg5 27.Qxg5 Rxg7 28.Qh4 Qe7 29.Qxe7 Rxe7 30.c4 Bc6 31.Rd1 b5 32.Rd6 Be8 33.c5 a5 34.Rg3+ Kh7 35.Rg5 b4 36.g4 fxg4 37.Rxg4 Bxh5 38.Rh4 Kg6 39.Rxe4 Bf3 40.Rh4
---------------------------------------------------------------------------
 39/78	1:44:22	 63 660 140k	10 166k	+1,04	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Rh3 d4 19.Rdh1 Ra7 20.h5 Bxg5 21.fxg5 Qxe5 22.Qf3 Qf5 23.Qxc6 Bb7 24.Qxb6 Bxg2 25.Bxd4 Rd7 26.Bxc5 Rc8 27.hxg6 Bxh3 28.gxf7+ Rxf7 29.Bd4 Qf3 30.Rh2 Qf4 31.Re2 Qc7 32.Qxa6 Rf1+ 33.Ka2 Qc4+ 34.Qxc4 Rxc4 35.Bf6 Kf7 36.a4 Rf3 37.Kb3 Rc6 38.Kb4 Bf1 39.Rh2 Rc4+ 40.Ka3 Bh3 41.Kb3 Rc8 42.a5 Kg6 43.Ka3 Rc4 44.b4 Rcxc3+ 45.Bxc3 Rxc3+ 46.Kb2 Rg3 47.a6
 39/78	1:44:22	 63 660 140k	10 166k	+1,36	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nd5 22.Nxd5 Bxd5 23.Qg4 f5 24.Qf4 Rfd8 25.Rc1 Rd7 26.g7 Ba3 27.h6 Kh7 28.c4 Bxc4 29.g4 Bd3+ 30.Ka1 Bc2 31.Rh2 Rc8 32.Rhxc2 Qxc2 33.g8Q+ Kxg8 34.bxa3 Rd1 35.Qg5+ Kf7 36.Qf6+ Ke8 37.Qxe6+ Kf8 38.Qxf5+ Ke8 39.Qe6+ Kf8 40.Qf6+ Ke8 41.Qh8+ Kd7 42.Qh7+ Ke8 43.Qg8+ Kd7 44.Qf7+ Kc6 45.Qe6+ Kc7 46.Qe7+ Kb8 47.Qd6+ Rxd6 48.Rxc2 Rxc2 49.exd6 Rh2
---------------------------------------------------------------------------
 40/81	2:47:48	102 690 922k	10 199k	+1,11	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Rh3 d4 19.Rdh1 Ra7 20.h5 Bxg5 21.fxg5 Qxe5 22.Qf3 Qf5 23.Qxc6 Bb7 24.Qxb6 Bxg2 25.Bxd4 Rd7 26.Bxc5 Rc8 27.hxg6 Bxh3 28.gxf7+ Kxf7 29.Bd4 e5 30.g6+ Qxg6 31.Rxh3 exd4 32.Qb3+ Kg7 33.Nd5 Qxc2+ 34.Qxc2 Rxc2 35.Rg3+ Kf8 36.Rf3+ Kg7 37.Kxc2 Rxd5 38.Kd3 Kg6 39.Kc4 Rh5 40.Kxd4 Kg5 41.Rf2 a5 42.Kc4 Kg4 43.Rf7 Kg3 44.b3 Kg4 45.Ra7 Kf4
 40/81	2:47:48	102 690 922k	10 199k	+1,61	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Nd5 21.Nxe4 Bb7 22.Nf6+ Kh8 23.Bc1 Rac8 24.g6 Nxf6 25.exf6 Bxf6 26.Rf1 Qe5 27.Re3 Qd4 28.c3 Qd8 29.Ka1 Bd5 30.Rg3 Qc7 31.Rxf6 Qxg3 32.gxf7 Kg7 33.Rg6+ Qxg6 34.hxg6 Kxg6 35.Qxa6 Kxf7 36.Qxb6 Rc4 37.Qd6 Ra8 38.b3 Rxc3 39.Bh6 Rg8 40.Qf4+ Ke8 41.Bg5 Rc2 42.g4 Rf8 43.Qb8+ Kf7
---------------------------------------------------------------------------
 41/81	3:01:15	110 915 311k	10 199k	+0,87	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Rh3 d4 19.Rdh1 Ra7 20.h5 Bxg5 21.fxg5 Qxe5 22.Qf3 Qf5 23.Qxc6 Bb7 24.Qxb6 Bxg2 25.Bxd4 Rd7 26.Bxc5 Rc8 27.hxg6 Bxh3 28.gxf7+ Kxf7 29.Bd4 Qf3 30.g6+ Kxg6 31.Rg1+ Kh7 32.Qxa6 Rcd8 33.Bb6 Rf8 34.Bc5 Rf4 35.Qc8 Rg7 36.Rxg7+ Kxg7 37.Ka2 Qf1 38.a4 Kh7 39.Qd7+ Rf7 40.Qe8 Qf5 41.a5 Rg7 42.Bd4 Qf7 43.Qxf7 Rxf7 44.a6 Kg6
 41/81	3:01:15	110 915 311k	10 199k	+1,53	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Nd5 21.Nxe4 Bb7 22.Nf6+ Kh8 23.Bd4 Bxf6 24.gxf6 Rg8 25.Qd2 Rg4 26.Qh6+ Kg8 27.Rh4 Rxg2 28.Rd2 Rg3 29.Bf2 Qxe5 30.Bxg3 Qxg3 31.a3 Ne3 32.Rdd4 Qg1+ 33.Ka2 Bd5+ 34.b3 Bxb3+ 35.Kb2 Nc4+ 36.Rxc4 Bxc4 37.Qf4 Be2 38.Rh3 Kh7 39.Rg3 Qxg3 40.Qxg3 Rg8 41.Qe3 Bxh5 42.Qd3+ Kh6 43.Qxa6 Rg4 44.Qxb6 Kg6 45.Qd8 Rf4 46.Qc7 Rf5 47.a4 Bf3 48.a5 Kxf6
---------------------------------------------------------------------------
 42/88	3:49:31	141 121 478k	10 247k	+0,84	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Rh3 d4 19.Rdh1 Ra7 20.h5 Bxg5 21.fxg5 Qxe5 22.Qf3 Qf5 23.Qxc6 Bb7 24.Qxb6 Bxg2 25.Bxd4 Rd7 26.Bxc5 Rc8 27.hxg6 Bxh3 28.gxf7+ Rxf7 29.Bd4 Qf3 30.Rh2 Qf4 31.Rxh3 Qf1+ 32.Ka2 Qxh3 33.g6 Rff8 34.Nd5 Rce8 35.Qxa6 Qf5 36.Qa7 Qxg6 37.Ne7+ Rxe7 38.Qxe7 Re8 39.Qd6 Kf7 40.Qe5 Rc8 41.c3 Qf5 42.Qg7+ Ke8 43.Bf6 Qd5+ 44.b3 Qd6
 42/88	3:49:31	141 121 478k	10 247k	+1,22	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Nc3 e5 34.g4 Rf2 35.b4 Bf8 36.Rd1 Rc8 37.Kb2 a5 38.Re1 axb4 39.axb4 Rc4 40.Rxb6 Bxb4 41.Rh6+ Kg7 42.Rg6+ Kh7 43.Rxe3 Bc5 44.Re2 Rb4+ 45.Ka2 Rf8 46.Ra6 Rxg4 47.Nd5 Kg7 48.Rxe5 Rg2 49.Kb3 Rb8+ 50.Kc3 Rd8 51.h6+ Kh8 52.Rc6 Bd6 53.Rh5 Ba3
---------------------------------------------------------------------------
 43/90	5:10:22	190 627 880k	10 236k	+0,74	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Rh3 d4 19.Rdh1 Ra7 20.h5 Bxg5 21.fxg5 Qxe5 22.Qf3 Qf5 23.Qxc6 Bb7 24.Qxb6 Bxg2 25.Bxd4 Rd7 26.hxg6 Bxh3 27.gxf7+ Kxf7 28.Bxc5 Rc8 29.Bd4 Qf3 30.g6+ Kxg6 31.Rg1+ Kh7 32.Qxa6 Rcd8 33.Be5 Qe3 34.Rh1 Qxe5 35.Rxh3+ Kg8 36.Rh6 Re7 37.Ka2 Qg5 38.Rxe6 Kg7 39.Rd6 Rxd6 40.Qxd6 Qe5 41.Qd2 Kf7 42.Qd3 Qe6+ 43.b3
 43/90	5:10:22	190 627 880k	10 236k	+1,30	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.c3 Rad8 29.Kc2 fxg6 30.b4 Bd6 31.Rxb6 Bf4 32.Ne3 Rd3 33.Nc4 Rxh3 34.gxh3 Kf7 35.hxg6+ Kxg6 36.Rxe6+ Kf5 37.Re7 Rh8 38.a4 Rxh3 39.b5 axb5 40.axb5 Rh6 41.b6 Re6 42.Rf7+ Rf6 43.Rc7 Ke6 44.Rc6+ Ke7 45.Rc8 Re6 46.Kd1 Rh6 47.b7 Rh1+ 48.Kc2 Rh2+ 49.Kb3 Rh1 50.b8Q Rb1+ 51.Nb2 Bxb8 52.Rxb8
---------------------------------------------------------------------------
 43/90	5:25:46	200 166 796k	10 240k	+0,74	15.a3 Nc6 16.Ng5+ Kg8 17.Qe2 g6 18.Rh3 d4 19.Rdh1 Ra7 20.h5 Bxg5 21.fxg5 Qxe5 22.Qf3 Qf5 23.Qxc6 Bb7 24.Qxb6 Bxg2 25.Bxd4 Rd7 26.hxg6 Bxh3 27.gxf7+ Kxf7 28.Bxc5 Rc8 29.Bd4 Qf3 30.g6+ Kxg6 31.Rg1+ Kh7 32.Qxa6 Rcd8 33.Be5 Qe3 34.Rh1 Qxe5 35.Rxh3+ Kg8 36.Rh6 Re7 37.Ka2 Qg5 38.Rxe6 Kg7 39.Rd6 Rxd6 40.Qxd6 Qe5 41.Qd2 Kf7 42.Qd3 Qe6+ 43.b3
 44/90	5:25:46	200 166 796k	10 240k	+1,35	15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Rh6+ Kg8 34.Rhh7 Bd4 35.Nxe3 Bxe3 36.Rdg7+ Kf8 37.h6 Bxh6 38.Rb7 Bg7 39.Rbxg7 Rf2 40.Kb3 e5 41.Rg6 e4 42.Rh8+ Kf7 43.Rxe8 Kxe8 44.Rxb6 Kf7 45.g4 e3 46.Kc3 a5 47.Kd3 e2 48.Kd2 e1Q+ 49.Kxe1
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tpoppins
Posts: 919
Joined: Tue Nov 24, 2015 9:11 pm
Location: upstate

Re: Food for thought ( engines)

Post by tpoppins »

Recent Stockfish can find 14.Bxh7+ in the initial position on its own, although it takes an inordinate time to do so. Here's the analysis from a week ago, with the then-current dev build:

[d]r1b2rk1/2q1bppp/pp2p3/2npP3/1n3P1P/2NBBN2/PPPQ2P1/1K1R3R w - - 0 14

Code: Select all

Analysis by Stockfish 240716 64 POPCNT:

14.h5 h6 15.a3 Ncxd3 16.cxd3 Nc6 17.g4 
  =  (-0.01)   Depth: 7/7   00:00:00  27kN
14.h5 h6 15.g4 Ncxd3 16.cxd3 Bb7 17.Qg2 b5 
  =  (-0.01)   Depth: 8/8   00:00:00  72kN
14.h5 h6 15.Be2 Ne4 16.Nxe4 dxe4 17.Nd4 Nd5 18.c4 
  =  (0.00)   Depth: 9/9   00:00:00  128kN
14.g4 Bb7 15.Nd4 Ncxd3 16.cxd3 Nc6 17.h5 Nxd4 18.Bxd4 Rfc8 
  =  (-0.04)   Depth: 10/14   00:00:00  234kN
14.h5 h6 15.Nd4 Ncxd3 16.cxd3 Bc5 17.g4 Bb7 18.Qf2 Nc6 19.Nxc6 
  =  (0.07)   Depth: 11/14   00:00:00  355kN
14.h5 h6 15.a3 Ncxd3 16.cxd3 Nc6 17.g4 Bb7 18.Ne2 d4 19.Bxd4 Na5 20.Rc1 Qd7 21.Bxb6 Bxf3 
  =  (0.19)   Depth: 12/17   00:00:00  586kN
14.h5 h6 15.a3 Nbxd3 16.cxd3 Bd7 17.g4 Rfb8 18.Qc2 b5 19.b4 Na4 20.Nxa4 Qxc2+ 21.Kxc2 
  =  (0.18)   Depth: 13/18   00:00:00  762kN
14.h5 Bb7 15.h6 g6 16.Nd4 Rac8 17.g4 b5 18.Rc1 Nc6 19.Nxc6 Qxc6 20.Ne2 Ne4 21.Bxe4 dxe4 22.g5 Rfd8 23.Nd4 
  =  (0.13)   Depth: 14/25   00:00:00  2820kN
14.h5 Bb7 15.h6 g6 16.Bd4 Rac8 17.Qe3 b5 18.Rc1 Nbxd3 19.cxd3 Qa5 20.Bxc5 Rxc5 21.Ng5 d4 22.Qxd4 b4 
  =  (0.06)   Depth: 15/25   00:00:01  6907kN
14.h5 Bb7 15.Nd4 Rac8 16.g4 b5 17.h6 g6 18.Rc1 Ne4 19.Bxe4 dxe4 20.Rhd1 Nd5 21.Nxe4 Nxf4 22.Nf6+ Bxf6 23.exf6 e5 
  =  (0.18)   Depth: 16/25   00:00:01  7094kN
14.h5 Bb7 15.Nd4 Rac8 16.g4 Nbxd3 17.cxd3 f6 18.exf6 Bxf6 19.Rhf1 e5 20.fxe5 Bxe5 21.Rxf8+ Rxf8 22.h6 g6 23.g5 Qf7 
  =  (0.11)   Depth: 17/25   00:00:01  7807kN
14.h5 Bb7 15.Nd4 Rac8 16.g4 b5 17.Rc1 Ne4 18.Bxe4 dxe4 19.h6 g6 20.Rhd1 Nc6 21.Nb3 b4 22.Na4 Rfd8 23.Qh2 a5 
  =  (0.11)   Depth: 18/25   00:00:01  10812kN
14.h5 Bb7 15.Nd4 Rac8 16.g4 b5 17.Rc1 h6 18.a3 Nc6 19.g5 Nxd3 20.cxd3 b4 21.axb4 hxg5 22.Nxc6 Bxc6 23.h6 
  =  (0.11)   Depth: 19/25   00:00:02  23419kN
14.h5 Bb7 
  =  (0.18 --)   Depth: 20/34   00:00:03  35417kN
14.h5 
  =  (0.27 ++)   Depth: 20/34   00:00:04  43454kN
14.h5 Bb7 
  =  (0.15 --)   Depth: 20/34   00:00:05  58447kN
14.h5 Bb7 15.h6 g6 16.Bd4 Rfc8 17.Rc1 Nbxd3 18.cxd3 Qd7 19.Ng5 a5 20.Qe3 a4 21.f5 Nxd3 22.f6 Nxc1 23.fxe7 Nxa2 24.Kxa2 Qxe7 25.Bxb6 
  =  (0.08)   Depth: 20/34   00:00:08  87995kN
14.h5 Bb7 15.Nd4 Rac8 16.g4 Nbxd3 17.cxd3 f6 18.exf6 Bxf6 19.Rdf1 e5 20.fxe5 Bxe5 21.Rhg1 a5 22.Rf5 Ba6 23.Ncb5 Qb8 24.Qg2 Rxf5 25.gxf5 Qb7 
  =  (0.03)   Depth: 21/34   00:00:14  157MN
14.h5 
  =  (0.10 ++)   Depth: 22/34   00:00:14  159MN
14.h5 Bb7 15.Nd4 Rac8 16.g4 Nbxd3 17.cxd3 f6 18.exf6 Bxf6 19.Rdf1 e5 20.fxe5 Bxe5 21.Rhg1 a5 22.Rxf8+ Rxf8 23.Ndb5 Bxc3 24.Qxc3 Qc6 25.h6 Rf7 26.Nd4 Qf6 27.Rh1 g5 28.Nf5 Qxc3 29.bxc3 
  =  (0.14)   Depth: 22/34   00:00:14  161MN
14.h5 
  =  (0.21 ++)   Depth: 23/34   00:00:17  185MN
14.h5 Bb7 15.Nd4 Nbxd3 16.cxd3 Rac8 17.g4 f6 18.exf6 Bxf6 19.Rhf1 e5 20.fxe5 Bxe5 21.Rf5 Rce8 22.Rdf1 Rxf5 23.Nxf5 d4 24.Nxd4 Qd7 25.Nf5 Qxd3+ 26.Qxd3 Nxd3 27.Bxb6 g6 28.hxg6 hxg6 
  =  (0.17)   Depth: 23/36   00:00:19  208MN
14.h5 
  =  (0.24 ++)   Depth: 24/36   00:00:20  220MN
14.h5 Bb7 
  =  (0.17 --)   Depth: 24/36   00:00:22  246MN
14.h5 
  =  (0.24 ++)   Depth: 24/36   00:00:24  263MN
14.h5 Bb7 
  =  (0.15 --)   Depth: 24/36   00:00:26  291MN
14.h5 Bb7 15.Nd4 Nbxd3 16.cxd3 a5 17.Qe2 a4 18.g4 Rfc8 19.Ncb5 Qd7 20.h6 g6 21.f5 a3 22.Nxa3 Rxa3 23.bxa3 Na4 24.Ka1 Nc3 25.Qd2 Nxd1 26.Rxd1 Ba6 27.Rb1 Qc7 
  =  (0.09)   Depth: 24/39   00:00:32  355MN
14.g4 Bb7 15.Nd4 Nbxd3 16.cxd3 f6 17.exf6 Bxf6 18.Rhf1 Bxh4 19.Nf3 d4 20.Nxd4 Rac8 21.Nf3 Bf6 22.g5 Bxc3 23.Qxc3 Nd7 24.Qxc7 Rxc7 25.Ne5 b5 26.g6 Nxe5 27.gxh7+ Kxh7 28.fxe5 
  =  (0.06)   Depth: 25/39   00:01:02  684MN
14.g4 
  =  (0.13 ++)   Depth: 26/39   00:01:58  1314MN
14.g4 
  =  (0.20 ++)   Depth: 26/39   00:02:11  1453MN
14.g4 Ncxd3 
  =  (0.13 --)   Depth: 26/39   00:02:34  1706MN
14.h5 Bb7 15.Rhf1 Ncxd3 16.cxd3 a5 17.Qe2 Ba6 18.g4 Rac8 19.h6 g6 20.f5 Nc6 21.Na4 d4 22.Bxd4 Nxd4 23.Nxd4 exf5 24.gxf5 Qd7 25.Nxb6 Qxd4 26.Nxc8 Bxc8 27.Qe4 Qxe4 28.dxe4 
  =  (0.07)   Depth: 26/42   00:03:04  2049MN
14.h5 
  =  (0.14 ++)   Depth: 27/42   00:03:13  2144MN
14.h5 Ncxd3 
  =  (0.07 --)   Depth: 27/42   00:03:35  2386MN
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 h6 18.g4 Rac8 19.Rhf1 Qb8 20.Ncb5 Rc5 21.Nc3 Rcc8 
  =  (0.00)   Depth: 27/43   00:04:23  2929MN
14.h5 Ncxd3 15.cxd3 a5 16.Bd4 Qd7 17.Qe3 Ba6 18.g4 Nc6 19.f5 exf5 20.gxf5 Qxf5 21.Nxd5 Rad8 22.Nxe7+ Nxe7 23.Rhg1 Qxh5 24.e6 f6 25.Bxb6 Rb8 26.Bd4 Nd5 27.Qe2 Rfc8 28.Ka1 Rb7 29.Qe4 Nb4 30.Bxf6 Nc2+ 31.Kb1 Na3+ 32.Ka1 
  =  (0.00)   Depth: 28/47   00:05:02  3361MN
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 Rac8 18.g4 Qd7 19.f5 Nc6 20.Nxc6 Rxc6 21.Qf3 Rfc8 22.f6 Ba3 23.Bc1 Rxc3 24.bxc3 Rxc3 25.Bxa3 Rxa3 26.Qf4 Bxd3+ 27.Rxd3 Qb5+ 28.Rb3 Rxb3+ 29.axb3 Qxb3+ 30.Ka1 Qa3+ 31.Kb1 Qb3+ 
  =  (0.00)   Depth: 29/47   00:05:14  3498MN
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 Rac8 18.g4 Qd7 19.f5 Nc6 20.Nxc6 Rxc6 21.Qf3 Rfc8 22.f6 Ba3 23.Bc1 Rxc3 24.bxc3 Rxc3 25.Bxa3 Rxa3 26.Qf4 Bxd3+ 27.Rxd3 Qb5+ 28.Rb3 Rxb3+ 29.axb3 Qxb3+ 30.Ka1 Qa3+ 31.Kb1 Qb3+ 
  =  (0.00)   Depth: 30/47   00:05:21  3570MN
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 Rac8 18.g4 Qd7 19.f5 Nc6 20.Nxc6 Rxc6 21.Qf3 Rfc8 22.f6 Ba3 23.Bc1 Rxc3 24.bxc3 Rxc3 25.Bxa3 Rxa3 26.Qf4 Bxd3+ 27.Rxd3 Qb5+ 28.Rb3 Rxb3+ 29.axb3 Qxb3+ 30.Ka1 Qa3+ 31.Kb1 Qb3+ 
  =  (0.00)   Depth: 31/47   00:06:20  4240MN, tb=33
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 Rfc8 18.Rhf1 Nc6 19.Qf2 Nb4 20.Qe2 
  =  (0.00)   Depth: 32/53   00:07:44  5179MN, tb=34
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 Rfc8 18.Rhf1 Nc6 19.Qf2 Nb4 20.Qe2 
  =  (0.00)   Depth: 33/53   00:08:45  5866MN, tb=35
14.Bd4 
  =  (0.06 ++)   Depth: 34/53   00:12:20  8290MN, tb=477
14.Bd4 Ncxd3 
  =  (0.00 --)   Depth: 34/53   00:20:54  14214MN, tb=707
14.Bd4 
  =  (0.06 ++)   Depth: 34/53   00:21:16  14456MN, tb=707
14.Bd4 Nbxd3 15.cxd3 a5 16.h5 a4 17.h6 g6 18.Nb5 Qd7 19.Nd6 Ba6 20.Qc3 f6 21.Bxc5 bxc5 22.Qxc5 Bxd6 23.exd6 Rac8 24.Qe3 Qxd6 25.Rhe1 Rce8 26.Rc1 Rb8 27.Ka1 Qb6 28.Qxe6+ Qxe6 29.Rxe6 Bxd3 30.Re7 Rfc8 31.Rg7+ Kh8 32.Rcc7 Rxc7 33.Rxc7 Be4 34.Rf7 
  =  (0.12)   Depth: 34/53   00:23:08  15715MN, tb=710
14.Bd4 
  =  (0.18 ++)   Depth: 35/53   00:25:03  17085MN, tb=710
14.Bd4 Nbxd3 
  =  (0.12 --)   Depth: 35/53   00:29:17  20007MN, tb=717
14.Bd4 Ncxd3 
  =  (0.01 --)   Depth: 35/53   00:33:14  22759MN, tb=732
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.h5 Qd7 18.g4 Rac8 19.Rh2 Nc6 20.Bxb6 Rb8 21.f5 Rfc8 22.f6 gxf6 23.exf6 Bxf6 24.Bc5 Bxc3 25.d4 Bxb2 26.Qg5+ Kh8 27.Qf6+ Kg8 28.Qg5+ 
  =  (0.00)   Depth: 35/63   00:36:40  25411MN, tb=809
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.Rh2 Nc6 20.Bxb6 Rb8 21.f5 Rfc8 22.f6 gxf6 23.exf6 Bxf6 24.Bc5 Bxc3 25.d4 Bxb2 26.Qg5+ Kh8 27.Qf6+ Kg8 28.Qg5+ 
  =  (0.00)   Depth: 36/63   00:37:37  26133MN, tb=811
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.Rh2 Nc6 20.Bxb6 Rb8 21.f5 Qb7 22.f6 gxf6 23.exf6 Bxf6 24.Bc5 Bxc3 25.d4 Bxb2 26.Qg5+ Kh8 27.Qf6+ Kg8 28.Qg5+ 
  =  (0.00)   Depth: 37/63   00:43:01  29912MN, tb=1586
14.Bd4 
  =  (0.06 ++)   Depth: 38/63   00:53:29  37301MN, tb=1872
14.Bd4 Ncxd3 
  =  (0.00 --)   Depth: 38/63   01:06:56  46860MN, tb=2558
14.Bd4 
  =  (0.06 ++)   Depth: 38/63   01:15:13  52694MN, tb=3058
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.g5 Nc6 20.g6 fxg6 21.hxg6 h6 22.Ne2 Nb4 23.Bc3 Bc5 24.Nfd4 Nc6 25.Qg3 Nxd4 26.Bxd4 Qa4 27.Qe3 Qb4 28.Ka1 Qa4 29.Kb1 
  =  (0.00)   Depth: 38/63   01:19:12  55426MN, tb=3098
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.g5 Nc6 20.Rd2 Qb7 21.Ne2 Bb4 22.Rdd1 Bc5 23.Rc1 Ne7 24.Nh4 Nc6 25.Nf3 
  =  (0.00)   Depth: 39/63   01:23:16  58230MN, tb=3279
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.g5 Nc6 20.Rd2 Qb7 21.Ne2 Bb4 22.Rdd1 Bc5 23.f5 exf5 24.g6 Nxd4 25.Nfxd4 h6 26.Nf4 Rfe8 27.gxf7+ Qxf7 28.Rhg1 Qe7 29.Rxg7+ Kxg7 30.Qg3+ Kh7 31.Qg6+ Kh8 32.Qxh6+ Qh7 33.Ng6+ Kg8 34.Qg5 Bxd4 35.Ne7+ Kh8 36.Ng6+ Kg8 
  =  (0.00)   Depth: 40/63   01:25:33  59823MN, tb=4671
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.a3 Nc6 20.f5 Nxd4 21.Nxd4 Rfe8 22.a4 exf5 23.h6 g6 24.gxf5 Bf6 25.e6 fxe6 26.fxe6 Qd6 27.Rhf1 Qe5 28.Qf3 Qxd4 29.Qxf6 Bxd3+ 30.Rxd3 Qxd3+ 31.Ka1 Rc7 32.Nb5 Qb3 33.Nxc7 Qxa4+ 34.Kb1 Qe4+ 35.Kc1 Qe3+ 36.Kc2 Qe2+ 37.Kc3 Qe3+ 38.Kc2 
  =  (0.00)   Depth: 41/66   01:36:30  67882MN, tb=6163
14.Bxh7+ 
  =  (0.06 ++)   Depth: 42/66   02:12:31  94268MN, tb=35783
14.Bxh7+ 
  =  (0.13 ++)   Depth: 42/66   02:12:36  94338MN, tb=36635
14.Bxh7+ 
  =  (0.24 ++)   Depth: 42/66   02:12:38  94363MN, tb=36701
14.Bxh7+ 
  +/=  (0.39 ++)   Depth: 42/66   02:12:51  94527MN, tb=37053
14.Bxh7+ 
  +/=  (0.59 ++)   Depth: 42/66   02:13:58  95372MN, tb=37459
14.Bxh7+ 
  +/-  (0.86 ++)   Depth: 42/66   02:16:33  97253MN, tb=38627
14.Bxh7+ 
  +/-  (1.22 ++)   Depth: 42/66   02:19:20  99221MN, tb=39170
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Nd5 21.Nxe4 Bb7 22.Nf6+ Kh8 23.Bd4 Bxf6 24.exf6 Nf4 25.Be5 Nxe2 26.Bxc7 Bxg2 27.Rh2 Bf3 28.Rd3 Bg4 29.g6 Kg8 30.Rd7 e5 31.g7 Nc3+ 32.bxc3 Bxd7 33.gxf8Q+ Rxf8 34.Bxe5 Kh7 35.Rd2 Bf5 36.Rd5 Rc8 37.Kb2 Rc6 38.Bd4 Bg4 
  +/-  (1.16)   Depth: 42/71   02:31:45  108594MN, tb=59187
14.Bxh7+ 
  +/-  (1.23 ++)   Depth: 43/71   02:49:47  122176MN, tb=81108
14.Bxh7+ 
  +/-  (1.30 ++)   Depth: 43/74   02:55:49  126699MN, tb=85319
14.Bxh7+ 
  +/-  (1.40 ++)   Depth: 43/74   03:09:58  137218MN, tb=108244
14.Bxh7+ Kxh7 
  +/-  (1.31 --)   Depth: 43/78   03:26:49  149982MN, tb=182502
14.Bxh7+ 
  +/-  (1.43 ++)   Depth: 43/78   03:40:01  159947MN, tb=237395
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 e5 32.Ka2 e3 33.Nc3 Re8 34.g4 Rf2 35.b4 Bf8 36.Rd1 Rc8 37.Kb2 a5 38.Re1 axb4 39.axb4 Rc4 40.Rxb6 Bxb4 41.Rh6+ Kg7 42.Rg6+ Kh8 43.Rxe3 Bc5 44.Re2 Rb4+ 45.Ka2 Rf8 46.Ra6 Rxg4 47.Ne4 Bd4 48.c3 Rxe4 49.Rxe4 Bxc3 
  +/-  (1.35)   Depth: 43/80   03:55:21  171489MN, tb=384675
14.Bxh7+ 
  +/-  (1.42 ++)   Depth: 44/80   04:14:25  185718MN, tb=440614
14.Bxh7+ 
  +/-  (1.49 ++)   Depth: 44/80   04:24:12  193132MN, tb=495847
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Rgg7 Bd4 34.Nxe3 Bxe3 35.h6 Bxh6 36.Rh7+ Kg8 37.Rxh6 e5 38.Rd2 Kf7 39.Rxb6 Re6 40.Rb7+ Kf6 41.c4 e4 42.Re2 a5 43.Kb3 e3 44.Rb8 Ke7 45.c5 
  +/-  (1.53)   Depth: 44/80   04:34:58  201242MN, tb=648099
14.Bxh7+ 
  +/-  (1.60 ++)   Depth: 45/80   05:17:40  233185MN, tb=823224
14.Bxh7+ 
  +-  (1.67 ++)   Depth: 45/80   05:35:22  246345MN, tb=849138
14.Bxh7+ Kxh7 
  +/-  (1.60 --)   Depth: 45/85   05:43:21  252425MN, tb=864575
14.Bxh7+ Kxh7 
  +/-  (1.45 --)   Depth: 45/85   06:11:07  273538MN, tb=983898
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Rgg7 Rf6 34.Rh7+ Kg8 35.Rdg7+ Kf8 36.Rb7 Kg8 37.Rhg7+ Kh8 38.Nc3 Bd4 39.Ne2 Be5 40.Rg4 Rf2 41.Re4 Bxb2 42.Rxe3 Bg7 43.g4 b5 44.Kb3 Rg2 45.Re4 Rf8 46.Rxe6 Rf3+ 47.c3 Rff2 48.Re8+ Kh7 49.Ree7 Rxg4 50.Rb6 Kg8 51.Rxa6 Bf8 
  +/-  (1.51)   Depth: 45/86   06:26:35  285569MN, tb=1075352
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Rgg7 Rf6 34.Rh7+ Kg8 35.Rdg7+ Kf8 36.Rb7 Kg8 37.Rhg7+ Kh8 38.Nc3 Bd4 39.Ne2 Be5 40.Rg4 Rf2 41.Re4 Bxb2 42.Rxe3 Bg7 43.g4 b5 44.Kb3 Rg2 45.Re4 Rf8 46.Rxe6 Rxg4 47.h6 Rf3+ 48.c3 Bf8 49.Rxa6 Re4 50.Ng1 Rf1 51.Rb8 Rb1+ 52.Kc2 Rxg1 
  +/-  (1.54)   Depth: 46/86   07:41:29  343652MN, tb=2051969
14.Bxh7+ Kxh7 
  +/-  (1.47 --)   Depth: 47/86   07:44:30  345712MN, tb=2086489
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Rh6+ Kg8 34.Rhh7 Bd4 35.Nxe3 Bxe3 36.Rdg7+ Kf8 37.h6 Bxh6 38.Ra7 Bg7 39.Raxg7 Rf6 40.g4 a5 41.Rb7 Kg8 42.Rhg7+ Kf8 43.g5 Rf5 44.Kb3 e5 45.g6 Rf6 46.Rbd7 Rf3+ 47.c3 e4 48.Rh7 
  +/-  (1.44)   Depth: 47/86   08:00:27  356606MN, tb=2165105
14.Bxh7+ 
  +/-  (1.51 ++)   Depth: 48/86   09:12:53  412152MN, tb=2949597
14.Bxh7+ Kxh7 
  +/-  (1.44 --)   Depth: 48/86   09:13:01  412263MN, tb=2949695
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Rgg7 Rf6 34.Rh7+ Kg8 35.Rdg7+ Kf8 36.Rb7 Kg8 37.Rhg7+ Kh8 38.Nc3 Bd4 39.Rh7+ Kg8 40.Ne2 Be5 41.Rhg7+ Kh8 42.Rg4 Rf2 43.Re4 Bxb2 44.Rxe3 Bg7 45.g4 b5 46.Kb3 Rg2 47.Re4 Rf8 48.Rxe6 Rxg4 49.h6 Rf3+ 50.c3 Bf8 51.Rxa6 Ra4 52.Rxa4 bxa4+ 53.Kxa4 Bxh6 
  +/-  (1.43)   Depth: 48/88   09:18:54  416623MN, tb=2981704
Note that at no point SF wastes time on the 15.a3 dud.
Following the PV we arrive by force at an endgame where White is a pawn up with his Rooks dominating the seventh rank, and which is evaluated at over +2.00. There are a couple of points along the way where Black can deviate but that doesn't help him.

[pgn]
[Result "*"]
[SetUp "1"]
[FEN "r1b2rk1/2q1bppp/pp2p3/2npP3/1n3P1P/2NBBN2/PPPQ2P1/1K1R3R w - - 0 14"]
[PlyCount "45"]

14. Bxh7+ Kxh7 15. Ng5+ Kg8 16. Qe2 g6 17. Rh3 Ne4 (17... Bb7) 18. Ngxe4 dxe4
19. h5 g5 20. fxg5 Bb7 (20... Qxe5 {2.13/40}) (20... Nd5 {2.62/38}) 21. g6 Nc6 22. Bf4 Nxe5 23.
Bxe5 Qxe5 24. Rd7 Qc5 25. Rxb7 Qg1+ 26. Qd1 Qxd1+ 27. Nxd1 Bc5 28. Rg3 fxg6 29.
Rxg6+ Kh8 30. a3 Rf1 31. Rd7 Re8 32. Ka2 e3 {2.46/40} 33. Rgg7 *

[/pgn]

In the final position White gets his second rook on the 7th rank with the help of a cute little trick: 33...Rxd1?? 34.Rh7+ Kg8 35.Rdg7+ Kf8 36.h6 and it's mate in two.
Top
neelbasant
Posts: 226
Joined: Sun Apr 01, 2012 7:57 pm

Re: Food for thought ( engines)

Post by neelbasant »

tpoppins wrote:Recent Stockfish can find 14.Bxh7+ in the initial position on its own, although it takes an inordinate time to do so. Here's the analysis from a week ago, with the then-current dev build:

[d]r1b2rk1/2q1bppp/pp2p3/2npP3/1n3P1P/2NBBN2/PPPQ2P1/1K1R3R w - - 0 14

Code: Select all

Analysis by Stockfish 240716 64 POPCNT:

14.h5 h6 15.a3 Ncxd3 16.cxd3 Nc6 17.g4 
  =  (-0.01)   Depth: 7/7   00:00:00  27kN
14.h5 h6 15.g4 Ncxd3 16.cxd3 Bb7 17.Qg2 b5 
  =  (-0.01)   Depth: 8/8   00:00:00  72kN
14.h5 h6 15.Be2 Ne4 16.Nxe4 dxe4 17.Nd4 Nd5 18.c4 
  =  (0.00)   Depth: 9/9   00:00:00  128kN
14.g4 Bb7 15.Nd4 Ncxd3 16.cxd3 Nc6 17.h5 Nxd4 18.Bxd4 Rfc8 
  =  (-0.04)   Depth: 10/14   00:00:00  234kN
14.h5 h6 15.Nd4 Ncxd3 16.cxd3 Bc5 17.g4 Bb7 18.Qf2 Nc6 19.Nxc6 
  =  (0.07)   Depth: 11/14   00:00:00  355kN
14.h5 h6 15.a3 Ncxd3 16.cxd3 Nc6 17.g4 Bb7 18.Ne2 d4 19.Bxd4 Na5 20.Rc1 Qd7 21.Bxb6 Bxf3 
  =  (0.19)   Depth: 12/17   00:00:00  586kN
14.h5 h6 15.a3 Nbxd3 16.cxd3 Bd7 17.g4 Rfb8 18.Qc2 b5 19.b4 Na4 20.Nxa4 Qxc2+ 21.Kxc2 
  =  (0.18)   Depth: 13/18   00:00:00  762kN
14.h5 Bb7 15.h6 g6 16.Nd4 Rac8 17.g4 b5 18.Rc1 Nc6 19.Nxc6 Qxc6 20.Ne2 Ne4 21.Bxe4 dxe4 22.g5 Rfd8 23.Nd4 
  =  (0.13)   Depth: 14/25   00:00:00  2820kN
14.h5 Bb7 15.h6 g6 16.Bd4 Rac8 17.Qe3 b5 18.Rc1 Nbxd3 19.cxd3 Qa5 20.Bxc5 Rxc5 21.Ng5 d4 22.Qxd4 b4 
  =  (0.06)   Depth: 15/25   00:00:01  6907kN
14.h5 Bb7 15.Nd4 Rac8 16.g4 b5 17.h6 g6 18.Rc1 Ne4 19.Bxe4 dxe4 20.Rhd1 Nd5 21.Nxe4 Nxf4 22.Nf6+ Bxf6 23.exf6 e5 
  =  (0.18)   Depth: 16/25   00:00:01  7094kN
14.h5 Bb7 15.Nd4 Rac8 16.g4 Nbxd3 17.cxd3 f6 18.exf6 Bxf6 19.Rhf1 e5 20.fxe5 Bxe5 21.Rxf8+ Rxf8 22.h6 g6 23.g5 Qf7 
  =  (0.11)   Depth: 17/25   00:00:01  7807kN
14.h5 Bb7 15.Nd4 Rac8 16.g4 b5 17.Rc1 Ne4 18.Bxe4 dxe4 19.h6 g6 20.Rhd1 Nc6 21.Nb3 b4 22.Na4 Rfd8 23.Qh2 a5 
  =  (0.11)   Depth: 18/25   00:00:01  10812kN
14.h5 Bb7 15.Nd4 Rac8 16.g4 b5 17.Rc1 h6 18.a3 Nc6 19.g5 Nxd3 20.cxd3 b4 21.axb4 hxg5 22.Nxc6 Bxc6 23.h6 
  =  (0.11)   Depth: 19/25   00:00:02  23419kN
14.h5 Bb7 
  =  (0.18 --)   Depth: 20/34   00:00:03  35417kN
14.h5 
  =  (0.27 ++)   Depth: 20/34   00:00:04  43454kN
14.h5 Bb7 
  =  (0.15 --)   Depth: 20/34   00:00:05  58447kN
14.h5 Bb7 15.h6 g6 16.Bd4 Rfc8 17.Rc1 Nbxd3 18.cxd3 Qd7 19.Ng5 a5 20.Qe3 a4 21.f5 Nxd3 22.f6 Nxc1 23.fxe7 Nxa2 24.Kxa2 Qxe7 25.Bxb6 
  =  (0.08)   Depth: 20/34   00:00:08  87995kN
14.h5 Bb7 15.Nd4 Rac8 16.g4 Nbxd3 17.cxd3 f6 18.exf6 Bxf6 19.Rdf1 e5 20.fxe5 Bxe5 21.Rhg1 a5 22.Rf5 Ba6 23.Ncb5 Qb8 24.Qg2 Rxf5 25.gxf5 Qb7 
  =  (0.03)   Depth: 21/34   00:00:14  157MN
14.h5 
  =  (0.10 ++)   Depth: 22/34   00:00:14  159MN
14.h5 Bb7 15.Nd4 Rac8 16.g4 Nbxd3 17.cxd3 f6 18.exf6 Bxf6 19.Rdf1 e5 20.fxe5 Bxe5 21.Rhg1 a5 22.Rxf8+ Rxf8 23.Ndb5 Bxc3 24.Qxc3 Qc6 25.h6 Rf7 26.Nd4 Qf6 27.Rh1 g5 28.Nf5 Qxc3 29.bxc3 
  =  (0.14)   Depth: 22/34   00:00:14  161MN
14.h5 
  =  (0.21 ++)   Depth: 23/34   00:00:17  185MN
14.h5 Bb7 15.Nd4 Nbxd3 16.cxd3 Rac8 17.g4 f6 18.exf6 Bxf6 19.Rhf1 e5 20.fxe5 Bxe5 21.Rf5 Rce8 22.Rdf1 Rxf5 23.Nxf5 d4 24.Nxd4 Qd7 25.Nf5 Qxd3+ 26.Qxd3 Nxd3 27.Bxb6 g6 28.hxg6 hxg6 
  =  (0.17)   Depth: 23/36   00:00:19  208MN
14.h5 
  =  (0.24 ++)   Depth: 24/36   00:00:20  220MN
14.h5 Bb7 
  =  (0.17 --)   Depth: 24/36   00:00:22  246MN
14.h5 
  =  (0.24 ++)   Depth: 24/36   00:00:24  263MN
14.h5 Bb7 
  =  (0.15 --)   Depth: 24/36   00:00:26  291MN
14.h5 Bb7 15.Nd4 Nbxd3 16.cxd3 a5 17.Qe2 a4 18.g4 Rfc8 19.Ncb5 Qd7 20.h6 g6 21.f5 a3 22.Nxa3 Rxa3 23.bxa3 Na4 24.Ka1 Nc3 25.Qd2 Nxd1 26.Rxd1 Ba6 27.Rb1 Qc7 
  =  (0.09)   Depth: 24/39   00:00:32  355MN
14.g4 Bb7 15.Nd4 Nbxd3 16.cxd3 f6 17.exf6 Bxf6 18.Rhf1 Bxh4 19.Nf3 d4 20.Nxd4 Rac8 21.Nf3 Bf6 22.g5 Bxc3 23.Qxc3 Nd7 24.Qxc7 Rxc7 25.Ne5 b5 26.g6 Nxe5 27.gxh7+ Kxh7 28.fxe5 
  =  (0.06)   Depth: 25/39   00:01:02  684MN
14.g4 
  =  (0.13 ++)   Depth: 26/39   00:01:58  1314MN
14.g4 
  =  (0.20 ++)   Depth: 26/39   00:02:11  1453MN
14.g4 Ncxd3 
  =  (0.13 --)   Depth: 26/39   00:02:34  1706MN
14.h5 Bb7 15.Rhf1 Ncxd3 16.cxd3 a5 17.Qe2 Ba6 18.g4 Rac8 19.h6 g6 20.f5 Nc6 21.Na4 d4 22.Bxd4 Nxd4 23.Nxd4 exf5 24.gxf5 Qd7 25.Nxb6 Qxd4 26.Nxc8 Bxc8 27.Qe4 Qxe4 28.dxe4 
  =  (0.07)   Depth: 26/42   00:03:04  2049MN
14.h5 
  =  (0.14 ++)   Depth: 27/42   00:03:13  2144MN
14.h5 Ncxd3 
  =  (0.07 --)   Depth: 27/42   00:03:35  2386MN
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 h6 18.g4 Rac8 19.Rhf1 Qb8 20.Ncb5 Rc5 21.Nc3 Rcc8 
  =  (0.00)   Depth: 27/43   00:04:23  2929MN
14.h5 Ncxd3 15.cxd3 a5 16.Bd4 Qd7 17.Qe3 Ba6 18.g4 Nc6 19.f5 exf5 20.gxf5 Qxf5 21.Nxd5 Rad8 22.Nxe7+ Nxe7 23.Rhg1 Qxh5 24.e6 f6 25.Bxb6 Rb8 26.Bd4 Nd5 27.Qe2 Rfc8 28.Ka1 Rb7 29.Qe4 Nb4 30.Bxf6 Nc2+ 31.Kb1 Na3+ 32.Ka1 
  =  (0.00)   Depth: 28/47   00:05:02  3361MN
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 Rac8 18.g4 Qd7 19.f5 Nc6 20.Nxc6 Rxc6 21.Qf3 Rfc8 22.f6 Ba3 23.Bc1 Rxc3 24.bxc3 Rxc3 25.Bxa3 Rxa3 26.Qf4 Bxd3+ 27.Rxd3 Qb5+ 28.Rb3 Rxb3+ 29.axb3 Qxb3+ 30.Ka1 Qa3+ 31.Kb1 Qb3+ 
  =  (0.00)   Depth: 29/47   00:05:14  3498MN
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 Rac8 18.g4 Qd7 19.f5 Nc6 20.Nxc6 Rxc6 21.Qf3 Rfc8 22.f6 Ba3 23.Bc1 Rxc3 24.bxc3 Rxc3 25.Bxa3 Rxa3 26.Qf4 Bxd3+ 27.Rxd3 Qb5+ 28.Rb3 Rxb3+ 29.axb3 Qxb3+ 30.Ka1 Qa3+ 31.Kb1 Qb3+ 
  =  (0.00)   Depth: 30/47   00:05:21  3570MN
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 Rac8 18.g4 Qd7 19.f5 Nc6 20.Nxc6 Rxc6 21.Qf3 Rfc8 22.f6 Ba3 23.Bc1 Rxc3 24.bxc3 Rxc3 25.Bxa3 Rxa3 26.Qf4 Bxd3+ 27.Rxd3 Qb5+ 28.Rb3 Rxb3+ 29.axb3 Qxb3+ 30.Ka1 Qa3+ 31.Kb1 Qb3+ 
  =  (0.00)   Depth: 31/47   00:06:20  4240MN, tb=33
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 Rfc8 18.Rhf1 Nc6 19.Qf2 Nb4 20.Qe2 
  =  (0.00)   Depth: 32/53   00:07:44  5179MN, tb=34
14.h5 Ncxd3 15.cxd3 a5 16.Nd4 Ba6 17.Qe2 Rfc8 18.Rhf1 Nc6 19.Qf2 Nb4 20.Qe2 
  =  (0.00)   Depth: 33/53   00:08:45  5866MN, tb=35
14.Bd4 
  =  (0.06 ++)   Depth: 34/53   00:12:20  8290MN, tb=477
14.Bd4 Ncxd3 
  =  (0.00 --)   Depth: 34/53   00:20:54  14214MN, tb=707
14.Bd4 
  =  (0.06 ++)   Depth: 34/53   00:21:16  14456MN, tb=707
14.Bd4 Nbxd3 15.cxd3 a5 16.h5 a4 17.h6 g6 18.Nb5 Qd7 19.Nd6 Ba6 20.Qc3 f6 21.Bxc5 bxc5 22.Qxc5 Bxd6 23.exd6 Rac8 24.Qe3 Qxd6 25.Rhe1 Rce8 26.Rc1 Rb8 27.Ka1 Qb6 28.Qxe6+ Qxe6 29.Rxe6 Bxd3 30.Re7 Rfc8 31.Rg7+ Kh8 32.Rcc7 Rxc7 33.Rxc7 Be4 34.Rf7 
  =  (0.12)   Depth: 34/53   00:23:08  15715MN, tb=710
14.Bd4 
  =  (0.18 ++)   Depth: 35/53   00:25:03  17085MN, tb=710
14.Bd4 Nbxd3 
  =  (0.12 --)   Depth: 35/53   00:29:17  20007MN, tb=717
14.Bd4 Ncxd3 
  =  (0.01 --)   Depth: 35/53   00:33:14  22759MN, tb=732
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.h5 Qd7 18.g4 Rac8 19.Rh2 Nc6 20.Bxb6 Rb8 21.f5 Rfc8 22.f6 gxf6 23.exf6 Bxf6 24.Bc5 Bxc3 25.d4 Bxb2 26.Qg5+ Kh8 27.Qf6+ Kg8 28.Qg5+ 
  =  (0.00)   Depth: 35/63   00:36:40  25411MN, tb=809
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.Rh2 Nc6 20.Bxb6 Rb8 21.f5 Rfc8 22.f6 gxf6 23.exf6 Bxf6 24.Bc5 Bxc3 25.d4 Bxb2 26.Qg5+ Kh8 27.Qf6+ Kg8 28.Qg5+ 
  =  (0.00)   Depth: 36/63   00:37:37  26133MN, tb=811
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.Rh2 Nc6 20.Bxb6 Rb8 21.f5 Qb7 22.f6 gxf6 23.exf6 Bxf6 24.Bc5 Bxc3 25.d4 Bxb2 26.Qg5+ Kh8 27.Qf6+ Kg8 28.Qg5+ 
  =  (0.00)   Depth: 37/63   00:43:01  29912MN, tb=1586
14.Bd4 
  =  (0.06 ++)   Depth: 38/63   00:53:29  37301MN, tb=1872
14.Bd4 Ncxd3 
  =  (0.00 --)   Depth: 38/63   01:06:56  46860MN, tb=2558
14.Bd4 
  =  (0.06 ++)   Depth: 38/63   01:15:13  52694MN, tb=3058
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.g5 Nc6 20.g6 fxg6 21.hxg6 h6 22.Ne2 Nb4 23.Bc3 Bc5 24.Nfd4 Nc6 25.Qg3 Nxd4 26.Bxd4 Qa4 27.Qe3 Qb4 28.Ka1 Qa4 29.Kb1 
  =  (0.00)   Depth: 38/63   01:19:12  55426MN, tb=3098
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.g5 Nc6 20.Rd2 Qb7 21.Ne2 Bb4 22.Rdd1 Bc5 23.Rc1 Ne7 24.Nh4 Nc6 25.Nf3 
  =  (0.00)   Depth: 39/63   01:23:16  58230MN, tb=3279
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.g5 Nc6 20.Rd2 Qb7 21.Ne2 Bb4 22.Rdd1 Bc5 23.f5 exf5 24.g6 Nxd4 25.Nfxd4 h6 26.Nf4 Rfe8 27.gxf7+ Qxf7 28.Rhg1 Qe7 29.Rxg7+ Kxg7 30.Qg3+ Kh7 31.Qg6+ Kh8 32.Qxh6+ Qh7 33.Ng6+ Kg8 34.Qg5 Bxd4 35.Ne7+ Kh8 36.Ng6+ Kg8 
  =  (0.00)   Depth: 40/63   01:25:33  59823MN, tb=4671
14.Bd4 Ncxd3 15.cxd3 a5 16.Qe3 Ba6 17.g4 Qd7 18.h5 Rac8 19.a3 Nc6 20.f5 Nxd4 21.Nxd4 Rfe8 22.a4 exf5 23.h6 g6 24.gxf5 Bf6 25.e6 fxe6 26.fxe6 Qd6 27.Rhf1 Qe5 28.Qf3 Qxd4 29.Qxf6 Bxd3+ 30.Rxd3 Qxd3+ 31.Ka1 Rc7 32.Nb5 Qb3 33.Nxc7 Qxa4+ 34.Kb1 Qe4+ 35.Kc1 Qe3+ 36.Kc2 Qe2+ 37.Kc3 Qe3+ 38.Kc2 
  =  (0.00)   Depth: 41/66   01:36:30  67882MN, tb=6163
14.Bxh7+ 
  =  (0.06 ++)   Depth: 42/66   02:12:31  94268MN, tb=35783
14.Bxh7+ 
  =  (0.13 ++)   Depth: 42/66   02:12:36  94338MN, tb=36635
14.Bxh7+ 
  =  (0.24 ++)   Depth: 42/66   02:12:38  94363MN, tb=36701
14.Bxh7+ 
  +/=  (0.39 ++)   Depth: 42/66   02:12:51  94527MN, tb=37053
14.Bxh7+ 
  +/=  (0.59 ++)   Depth: 42/66   02:13:58  95372MN, tb=37459
14.Bxh7+ 
  +/-  (0.86 ++)   Depth: 42/66   02:16:33  97253MN, tb=38627
14.Bxh7+ 
  +/-  (1.22 ++)   Depth: 42/66   02:19:20  99221MN, tb=39170
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Nd5 21.Nxe4 Bb7 22.Nf6+ Kh8 23.Bd4 Bxf6 24.exf6 Nf4 25.Be5 Nxe2 26.Bxc7 Bxg2 27.Rh2 Bf3 28.Rd3 Bg4 29.g6 Kg8 30.Rd7 e5 31.g7 Nc3+ 32.bxc3 Bxd7 33.gxf8Q+ Rxf8 34.Bxe5 Kh7 35.Rd2 Bf5 36.Rd5 Rc8 37.Kb2 Rc6 38.Bd4 Bg4 
  +/-  (1.16)   Depth: 42/71   02:31:45  108594MN, tb=59187
14.Bxh7+ 
  +/-  (1.23 ++)   Depth: 43/71   02:49:47  122176MN, tb=81108
14.Bxh7+ 
  +/-  (1.30 ++)   Depth: 43/74   02:55:49  126699MN, tb=85319
14.Bxh7+ 
  +/-  (1.40 ++)   Depth: 43/74   03:09:58  137218MN, tb=108244
14.Bxh7+ Kxh7 
  +/-  (1.31 --)   Depth: 43/78   03:26:49  149982MN, tb=182502
14.Bxh7+ 
  +/-  (1.43 ++)   Depth: 43/78   03:40:01  159947MN, tb=237395
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 e5 32.Ka2 e3 33.Nc3 Re8 34.g4 Rf2 35.b4 Bf8 36.Rd1 Rc8 37.Kb2 a5 38.Re1 axb4 39.axb4 Rc4 40.Rxb6 Bxb4 41.Rh6+ Kg7 42.Rg6+ Kh8 43.Rxe3 Bc5 44.Re2 Rb4+ 45.Ka2 Rf8 46.Ra6 Rxg4 47.Ne4 Bd4 48.c3 Rxe4 49.Rxe4 Bxc3 
  +/-  (1.35)   Depth: 43/80   03:55:21  171489MN, tb=384675
14.Bxh7+ 
  +/-  (1.42 ++)   Depth: 44/80   04:14:25  185718MN, tb=440614
14.Bxh7+ 
  +/-  (1.49 ++)   Depth: 44/80   04:24:12  193132MN, tb=495847
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Rgg7 Bd4 34.Nxe3 Bxe3 35.h6 Bxh6 36.Rh7+ Kg8 37.Rxh6 e5 38.Rd2 Kf7 39.Rxb6 Re6 40.Rb7+ Kf6 41.c4 e4 42.Re2 a5 43.Kb3 e3 44.Rb8 Ke7 45.c5 
  +/-  (1.53)   Depth: 44/80   04:34:58  201242MN, tb=648099
14.Bxh7+ 
  +/-  (1.60 ++)   Depth: 45/80   05:17:40  233185MN, tb=823224
14.Bxh7+ 
  +-  (1.67 ++)   Depth: 45/80   05:35:22  246345MN, tb=849138
14.Bxh7+ Kxh7 
  +/-  (1.60 --)   Depth: 45/85   05:43:21  252425MN, tb=864575
14.Bxh7+ Kxh7 
  +/-  (1.45 --)   Depth: 45/85   06:11:07  273538MN, tb=983898
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Rgg7 Rf6 34.Rh7+ Kg8 35.Rdg7+ Kf8 36.Rb7 Kg8 37.Rhg7+ Kh8 38.Nc3 Bd4 39.Ne2 Be5 40.Rg4 Rf2 41.Re4 Bxb2 42.Rxe3 Bg7 43.g4 b5 44.Kb3 Rg2 45.Re4 Rf8 46.Rxe6 Rf3+ 47.c3 Rff2 48.Re8+ Kh7 49.Ree7 Rxg4 50.Rb6 Kg8 51.Rxa6 Bf8 
  +/-  (1.51)   Depth: 45/86   06:26:35  285569MN, tb=1075352
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Rgg7 Rf6 34.Rh7+ Kg8 35.Rdg7+ Kf8 36.Rb7 Kg8 37.Rhg7+ Kh8 38.Nc3 Bd4 39.Ne2 Be5 40.Rg4 Rf2 41.Re4 Bxb2 42.Rxe3 Bg7 43.g4 b5 44.Kb3 Rg2 45.Re4 Rf8 46.Rxe6 Rxg4 47.h6 Rf3+ 48.c3 Bf8 49.Rxa6 Re4 50.Ng1 Rf1 51.Rb8 Rb1+ 52.Kc2 Rxg1 
  +/-  (1.54)   Depth: 46/86   07:41:29  343652MN, tb=2051969
14.Bxh7+ Kxh7 
  +/-  (1.47 --)   Depth: 47/86   07:44:30  345712MN, tb=2086489
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Rh6+ Kg8 34.Rhh7 Bd4 35.Nxe3 Bxe3 36.Rdg7+ Kf8 37.h6 Bxh6 38.Ra7 Bg7 39.Raxg7 Rf6 40.g4 a5 41.Rb7 Kg8 42.Rhg7+ Kf8 43.g5 Rf5 44.Kb3 e5 45.g6 Rf6 46.Rbd7 Rf3+ 47.c3 e4 48.Rh7 
  +/-  (1.44)   Depth: 47/86   08:00:27  356606MN, tb=2165105
14.Bxh7+ 
  +/-  (1.51 ++)   Depth: 48/86   09:12:53  412152MN, tb=2949597
14.Bxh7+ Kxh7 
  +/-  (1.44 --)   Depth: 48/86   09:13:01  412263MN, tb=2949695
14.Bxh7+ Kxh7 15.Ng5+ Kg8 16.Qe2 g6 17.Rh3 Ne4 18.Ngxe4 dxe4 19.h5 g5 20.fxg5 Bb7 21.g6 Nc6 22.Bf4 Nxe5 23.Bxe5 Qxe5 24.Rd7 Qc5 25.Rxb7 Qg1+ 26.Qd1 Qxd1+ 27.Nxd1 Bc5 28.Rg3 fxg6 29.Rxg6+ Kh8 30.a3 Rf1 31.Rd7 Re8 32.Ka2 e3 33.Rgg7 Rf6 34.Rh7+ Kg8 35.Rdg7+ Kf8 36.Rb7 Kg8 37.Rhg7+ Kh8 38.Nc3 Bd4 39.Rh7+ Kg8 40.Ne2 Be5 41.Rhg7+ Kh8 42.Rg4 Rf2 43.Re4 Bxb2 44.Rxe3 Bg7 45.g4 b5 46.Kb3 Rg2 47.Re4 Rf8 48.Rxe6 Rxg4 49.h6 Rf3+ 50.c3 Bf8 51.Rxa6 Ra4 52.Rxa4 bxa4+ 53.Kxa4 Bxh6 
  +/-  (1.43)   Depth: 48/88   09:18:54  416623MN, tb=2981704
Note that at no point SF wastes time on the 15.a3 dud.
Following the PV we arrive by force at an endgame where White is a pawn up with his Rooks dominating the seventh rank, and which is evaluated at over +2.00. There are a couple of points along the way where Black can deviate but that doesn't help him.

[pgn]
[Result "*"]
[SetUp "1"]
[FEN "r1b2rk1/2q1bppp/pp2p3/2npP3/1n3P1P/2NBBN2/PPPQ2P1/1K1R3R w - - 0 14"]
[PlyCount "45"]

14. Bxh7+ Kxh7 15. Ng5+ Kg8 16. Qe2 g6 17. Rh3 Ne4 (17... Bb7) 18. Ngxe4 dxe4
19. h5 g5 20. fxg5 Bb7 (20... Qxe5 {2.13/40}) (20... Nd5 {2.62/38}) 21. g6 Nc6 22. Bf4 Nxe5 23.
Bxe5 Qxe5 24. Rd7 Qc5 25. Rxb7 Qg1+ 26. Qd1 Qxd1+ 27. Nxd1 Bc5 28. Rg3 fxg6 29.
Rxg6+ Kh8 30. a3 Rf1 31. Rd7 Re8 32. Ka2 e3 {2.46/40} 33. Rgg7 *

[/pgn]

In the final position White gets his second rook on the 7th rank with the help of a cute little trick: 33...Rxd1?? 34.Rh7+ Kg8 35.Rdg7+ Kf8 36.h6 and it's mate in two.
I like the way you and stockfish analysed the position..
Thank you Very Much..
Neel
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