Nh4 is hard to find, but the stats will tell you it is right

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Dann Corbit
Posts: 12538
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Nh4 is hard to find, but the stats will tell you it is right

Post by Dann Corbit »

[d]r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq - acd 43/61; acs 6451 ; acn 49590987888; ce 18 ; bm Nh4; pv Nh4 O-O Qg4 Ng6 Nxg6 fxg6 Bc1 Rf5 Bxc6 Bxc6 a5 a6 f4 Bb5 Re1 Qd8 h3 Qc7 Bb2 Re8 Reb1 Qf7 Rf1 Qc7 g3 b6 axb6 Qxb6 Rfb1 a5 Kg2 Rf7 Ba3 a4 h4 Qa5 Bd6 Bc6 Ra3 Rb7 Rxb7 Bxb7 Bb4 Qb5 Ra1 Qd7;
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Nh4 is hard to find, but the stats will tell you it is r

Post by Vinvin »

Dann Corbit wrote:r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq - acd 43/61; acs 6451 ; acn 49590987888; ce 18 ; bm Nh4; pv Nh4 O-O Qg4 Ng6 Nxg6 fxg6 Bc1 Rf5 Bxc6 Bxc6 a5 a6 f4 Bb5 Re1 Qd8 h3 Qc7 Bb2 Re8 Reb1 Qf7 Rf1 Qc7 g3 b6 axb6 Qxb6 Rfb1 a5 Kg2 Rf7 Ba3 a4 h4 Qa5 Bd6 Bc6 Ra3 Rb7 Rxb7 Bxb7 Bb4 Qb5 Ra1 Qd7;
Long for SF : 13m11s , i7-4930K 6 cores @4.4 Ghz

FEN: r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq - 0 1

Code: Select all

Stockfish_15090721_x64_modern:
...
 33/41	01:09	 624.279k	9.010k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nf3 Qc7 5.a5 Bb5 6.Rfb1 a6 7.h3 Qd7 8.Nh4 Nxh4 9.Qxh4 0-0 10.Qg3 Kh7 11.Bc1 Rae8 12.Ba3 Rg8 13.Qf3 Rc8 14.Bd6 Rge8 15.Qf4 Red8 16.Bc5 Re8 17.Qg4 Qc7
 34/41	01:26	 781.018k	8.995k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nf3 Qc7 5.a5 Bb5 6.Rfb1 a6 7.h3 Qd7 8.Nh4 Nxh4 9.Qxh4 0-0 10.Qg3 Kh7 11.Bc1 Rae8 12.Ba3 Rg8 13.Qf3 Rc8 14.Bd6 Rgd8 15.Bc5 Re8 16.Qg4 Kg8 17.Bd6 Red8 18.Qg3 Kh7
 35/41	01:41	 908.879k	8.955k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nf3 Qc7 5.a5 Bb5 6.Rfb1 a6 7.h3 Qd7 8.Nh4 Nxh4 9.Qxh4 0-0 10.Qg3 Kh7 11.Bc1 Rae8 12.Ba3 Rg8 13.Qf3 Rc8 14.Bd6 Rgd8 15.Bc5 Re8 16.Qg4 Kg8 17.Bd6 Red8 18.Qg3 Kh7 19.Bc5
 36/46	03:53	 2.112.549k	9.066k	+0,10	1.Ng5 h6 2.Nh3 Ng6 3.Qg4 0-0 4.Nf4 Nxf4 5.Bxf4 Kh7 6.Bc1 a6 7.Bxc6 Bxc6 8.Ba3 Rfd8 9.Bd6 Qd7 10.a5 Rac8 11.Rfb1 Ba4 12.Qd1 Bb5 13.Qf3 Rh8 14.h3 Rhe8 15.Qf4 Red8 16.Bc5 Rg8 17.Qf3 Rge8 18.Qg4 Kg8
 37/48	05:59	 3.310.681k	9.212k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 b6 5.Nf4 Nxf4 6.Bxf4 Qc7 7.Bc1 Qd8 8.Qg4 Kf8 9.Ba3+ Kg8 10.Bd6 Kh7 11.Qf4 Qe8 12.a5 Ba4 13.Ra2 b5 14.Rb1 Rc8 15.Rab2 Qd7 16.Bb4 Rhd8 17.h3 a6 18.Qf3 Kg8 19.Qg3 Kh7 20.Ra1 Qc7
 38/52	07:00	 3.893.655k	9.265k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 Qc7 5.a5 Qd8 6.Bc1 0-0 7.Nf4 Nxf4 8.Bxf4 Qe7 9.Rfe1 Kh7 10.Bc1 Qe8 11.Ba3 Rg8 12.Bc5 Bc6 13.Reb1 Qd7 14.Bd6 Ba4 15.Rb2 Bc6 16.Qe2 Rgd8 17.Qf3 Bb5 18.Rbb1 Ba4 19.Rb2 Re8
 39/52+	13:21	 7.328.569k	9.146k	+0,17	1.Nh4
 39/58	23:11	 12.664.522k	9.099k	+0,12	1.Nh4 0-0 2.Qg4 Ng6 3.Nxg6 fxg6 4.Bc1 Rf5 5.Bxc6 Bxc6 6.a5 Qd8 7.f4 Bb5 8.Bd2 b6 9.Rfb1 a6 10.axb6 Qxb6 11.Ra2 Qd8 12.Bc1 Bd7 13.Qg3 Be8 14.Qf3 a5 15.Rab2 a4 16.Rb6 Bd7 17.g4 Rf7 18.Ba3 h6 19.Kg2 Qh4 20.Qg3 g5 21.Qxh4 gxh4 22.Rd6 g5
 40/58	27:21	 14.978.224k	9.124k	+0,13	1.Nh4 0-0 2.Qg4 Ng6 3.Rfe1 Nce7 4.Nxg6 fxg6 5.Reb1 a6 6.Bxd7 Qxd7 7.Bg5 Nc8 8.Bc1 b6 9.f3 Rb8 10.g3 Na7 11.f4 Rb7 12.Kg2 Nc8 13.Qe2 Rf7 14.Ba3 Rf5 15.Kg1 Rf7 16.Qg4 Rf5 17.Qd1 Na7 18.Bc1 Nc8 19.Kg2 Rf7 20.Ba3 Rf5 21.Qe2 Rf7
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Dann Corbit
Posts: 12538
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Nh4 is hard to find, but the stats will tell you it is r

Post by Dann Corbit »

Statistically (at least in my filtered database) Nh4 fares much better than Ng5 in actual games. This is one of those positions that takes a mighty effort for the engines to find it.
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Nh4 is hard to find, but the stats will tell you it is r

Post by Vinvin »

Vinvin wrote:
Dann Corbit wrote:r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq - acd 43/61; acs 6451 ; acn 49590987888; ce 18 ; bm Nh4; pv Nh4 O-O Qg4 Ng6 Nxg6 fxg6 Bc1 Rf5 Bxc6 Bxc6 a5 a6 f4 Bb5 Re1 Qd8 h3 Qc7 Bb2 Re8 Reb1 Qf7 Rf1 Qc7 g3 b6 axb6 Qxb6 Rfb1 a5 Kg2 Rf7 Ba3 a4 h4 Qa5 Bd6 Bc6 Ra3 Rb7 Rxb7 Bxb7 Bb4 Qb5 Ra1 Qd7;
Long for SF : 13m11s , i7-4930K 6 cores @4.4 Ghz

FEN: r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq - 0 1

Code: Select all

Stockfish_15090721_x64_modern:
...
 33/41	01:09	 624.279k	9.010k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nf3 Qc7 5.a5 Bb5 6.Rfb1 a6 7.h3 Qd7 8.Nh4 Nxh4 9.Qxh4 0-0 10.Qg3 Kh7 11.Bc1 Rae8 12.Ba3 Rg8 13.Qf3 Rc8 14.Bd6 Rge8 15.Qf4 Red8 16.Bc5 Re8 17.Qg4 Qc7
 34/41	01:26	 781.018k	8.995k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nf3 Qc7 5.a5 Bb5 6.Rfb1 a6 7.h3 Qd7 8.Nh4 Nxh4 9.Qxh4 0-0 10.Qg3 Kh7 11.Bc1 Rae8 12.Ba3 Rg8 13.Qf3 Rc8 14.Bd6 Rgd8 15.Bc5 Re8 16.Qg4 Kg8 17.Bd6 Red8 18.Qg3 Kh7
 35/41	01:41	 908.879k	8.955k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nf3 Qc7 5.a5 Bb5 6.Rfb1 a6 7.h3 Qd7 8.Nh4 Nxh4 9.Qxh4 0-0 10.Qg3 Kh7 11.Bc1 Rae8 12.Ba3 Rg8 13.Qf3 Rc8 14.Bd6 Rgd8 15.Bc5 Re8 16.Qg4 Kg8 17.Bd6 Red8 18.Qg3 Kh7 19.Bc5
 36/46	03:53	 2.112.549k	9.066k	+0,10	1.Ng5 h6 2.Nh3 Ng6 3.Qg4 0-0 4.Nf4 Nxf4 5.Bxf4 Kh7 6.Bc1 a6 7.Bxc6 Bxc6 8.Ba3 Rfd8 9.Bd6 Qd7 10.a5 Rac8 11.Rfb1 Ba4 12.Qd1 Bb5 13.Qf3 Rh8 14.h3 Rhe8 15.Qf4 Red8 16.Bc5 Rg8 17.Qf3 Rge8 18.Qg4 Kg8
 37/48	05:59	 3.310.681k	9.212k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 b6 5.Nf4 Nxf4 6.Bxf4 Qc7 7.Bc1 Qd8 8.Qg4 Kf8 9.Ba3+ Kg8 10.Bd6 Kh7 11.Qf4 Qe8 12.a5 Ba4 13.Ra2 b5 14.Rb1 Rc8 15.Rab2 Qd7 16.Bb4 Rhd8 17.h3 a6 18.Qf3 Kg8 19.Qg3 Kh7 20.Ra1 Qc7
 38/52	07:00	 3.893.655k	9.265k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 Qc7 5.a5 Qd8 6.Bc1 0-0 7.Nf4 Nxf4 8.Bxf4 Qe7 9.Rfe1 Kh7 10.Bc1 Qe8 11.Ba3 Rg8 12.Bc5 Bc6 13.Reb1 Qd7 14.Bd6 Ba4 15.Rb2 Bc6 16.Qe2 Rgd8 17.Qf3 Bb5 18.Rbb1 Ba4 19.Rb2 Re8
 39/52+	13:21	 7.328.569k	9.146k	+0,17	1.Nh4
 39/58	23:11	 12.664.522k	9.099k	+0,12	1.Nh4 0-0 2.Qg4 Ng6 3.Nxg6 fxg6 4.Bc1 Rf5 5.Bxc6 Bxc6 6.a5 Qd8 7.f4 Bb5 8.Bd2 b6 9.Rfb1 a6 10.axb6 Qxb6 11.Ra2 Qd8 12.Bc1 Bd7 13.Qg3 Be8 14.Qf3 a5 15.Rab2 a4 16.Rb6 Bd7 17.g4 Rf7 18.Ba3 h6 19.Kg2 Qh4 20.Qg3 g5 21.Qxh4 gxh4 22.Rd6 g5
 40/58	27:21	 14.978.224k	9.124k	+0,13	1.Nh4 0-0 2.Qg4 Ng6 3.Rfe1 Nce7 4.Nxg6 fxg6 5.Reb1 a6 6.Bxd7 Qxd7 7.Bg5 Nc8 8.Bc1 b6 9.f3 Rb8 10.g3 Na7 11.f4 Rb7 12.Kg2 Nc8 13.Qe2 Rf7 14.Ba3 Rf5 15.Kg1 Rf7 16.Qg4 Rf5 17.Qd1 Na7 18.Bc1 Nc8 19.Kg2 Rf7 20.Ba3 Rf5 21.Qe2 Rf7
Even longer the 2nd time 19m14s :

Code: Select all

Stockfish_15090721_x64_modern:
...
 34/42	01:33	 840.010k	8.994k	+0,12	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 b6 5.Nf4 Nxf4 6.Bxf4 Qc7 7.Bc1 Qd8 8.Qg4 Kf8 9.Ba3+ Kg8 10.Bd6 Bc6 11.Rfb1 Kh7 12.Qf4 Qd7 13.a5 b5 14.a6 Rac8 15.Qg3 Rhg8 16.Bc5 Qc7 17.Qf3 Qd7 18.Qg4 Rgd8 19.h3
 35/42-	01:53	 1.024.649k	9.015k	+0,06	1.Ng5 h6
 35/45+	02:01	 1.090.676k	9.001k	+0,12	1.Ng5
 35/45	02:16	 1.232.029k	9.003k	+0,12	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 Qc8 5.a5 b5 6.Nf4 Nxf4 7.Bxf4 Kf8 8.a6 Rb8 9.Bc1 Kg8 10.Ba3 Rb6 11.Bc5 Rxa6 12.Bxa7 Ra4 13.Bc5 Qa8 14.Rab1 Ra2 15.Rfc1 Bc6 16.h4 Qe8 17.Ra1 Ra4 18.Rxa4 bxa4 19.Rb1
 36/45	02:33	 1.380.613k	8.990k	+0,12	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 Qc8 5.a5 b5 6.Nf4 Nxf4 7.Bxf4 Kf8 8.a6 Rb8 9.Bc1 Kg8 10.Qh4 Kh7 11.Qe7 Kg6 12.Ba3 Re8 13.Qh4 Kh7 14.Qh5 Kg8 15.Bc5 Ra8 16.Qg4 Bc6 17.Rfb1 Kh7 18.Bd6 Qd7 19.Qg3
 37/57+	19:14	 9.804.732k	8.492k	+0,18	1.Nh4
 37/57	19:43	 10.068.948k	8.508k	+0,18	1.Nh4 Qa5 2.Qg4 Ng6 3.Nxg6 hxg6 4.Rfb1 a6 5.Bxc6 Bxc6 6.Qd1 Rh5 7.Qe1 Kf8 8.h3 Kg8 9.Be3 Re8 10.Rb4 Qc7 11.a5 Bb5 12.Rbb1 Rc8 13.Qd1 Qd8 14.Bd2 Qd7 15.Qc1 Qd8 16.Qe1 Rh8 17.f3 Rh5 18.Be3 b6 19.axb6 Qxb6
 38/57	20:56	 10.732.584k	8.544k	+0,18	1.Nh4 Qa5 2.Qg4 Ng6 3.Nxg6 hxg6 4.Rfb1 a6 5.Bxc6 Bxc6 6.Qd1 Rh5 7.Qe1 Kf8 8.h3 Kg8 9.Be3 Re8 10.Rb4 Qc7 11.a5 Bb5 12.Rbb1 Rc8 13.Qd1 Qd8 14.Bd2 Qd7 15.Qc1 Qd8 16.Qe1 Rh8 17.Be3 Rh5 18.Qc1 g5 19.Qe1 Rh8 20.Qe2
 39/57	22:28	 11.589.892k	8.591k	+0,18	1.Nh4 Qa5 2.Qg4 Ng6 3.Nxg6 hxg6 4.Rfb1 a6 5.Bxc6 Bxc6 6.Qd1 Rh5 7.Qe1 Kf8 8.h3 Kg8 9.Be3 Re8 10.Rb4 Qc7 11.a5 Bb5 12.Rbb1 Rc8 13.Qd1 Qd8 14.Bd2 Qd7 15.Qc1 Qd8 16.Qe1 Rh8 17.Qd1 Rh5 18.Be3 Rh4 19.Qc1 Rh5 20.Qa3 Rb8
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Nh4 is hard to find, but the stats will tell you it is r

Post by zullil »

Vinvin wrote:
Vinvin wrote:
Dann Corbit wrote:r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq - acd 43/61; acs 6451 ; acn 49590987888; ce 18 ; bm Nh4; pv Nh4 O-O Qg4 Ng6 Nxg6 fxg6 Bc1 Rf5 Bxc6 Bxc6 a5 a6 f4 Bb5 Re1 Qd8 h3 Qc7 Bb2 Re8 Reb1 Qf7 Rf1 Qc7 g3 b6 axb6 Qxb6 Rfb1 a5 Kg2 Rf7 Ba3 a4 h4 Qa5 Bd6 Bc6 Ra3 Rb7 Rxb7 Bxb7 Bb4 Qb5 Ra1 Qd7;
Long for SF : 13m11s , i7-4930K 6 cores @4.4 Ghz

FEN: r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq - 0 1

Code: Select all

Stockfish_15090721_x64_modern:
...
 33/41	01:09	 624.279k	9.010k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nf3 Qc7 5.a5 Bb5 6.Rfb1 a6 7.h3 Qd7 8.Nh4 Nxh4 9.Qxh4 0-0 10.Qg3 Kh7 11.Bc1 Rae8 12.Ba3 Rg8 13.Qf3 Rc8 14.Bd6 Rge8 15.Qf4 Red8 16.Bc5 Re8 17.Qg4 Qc7
 34/41	01:26	 781.018k	8.995k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nf3 Qc7 5.a5 Bb5 6.Rfb1 a6 7.h3 Qd7 8.Nh4 Nxh4 9.Qxh4 0-0 10.Qg3 Kh7 11.Bc1 Rae8 12.Ba3 Rg8 13.Qf3 Rc8 14.Bd6 Rgd8 15.Bc5 Re8 16.Qg4 Kg8 17.Bd6 Red8 18.Qg3 Kh7
 35/41	01:41	 908.879k	8.955k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nf3 Qc7 5.a5 Bb5 6.Rfb1 a6 7.h3 Qd7 8.Nh4 Nxh4 9.Qxh4 0-0 10.Qg3 Kh7 11.Bc1 Rae8 12.Ba3 Rg8 13.Qf3 Rc8 14.Bd6 Rgd8 15.Bc5 Re8 16.Qg4 Kg8 17.Bd6 Red8 18.Qg3 Kh7 19.Bc5
 36/46	03:53	 2.112.549k	9.066k	+0,10	1.Ng5 h6 2.Nh3 Ng6 3.Qg4 0-0 4.Nf4 Nxf4 5.Bxf4 Kh7 6.Bc1 a6 7.Bxc6 Bxc6 8.Ba3 Rfd8 9.Bd6 Qd7 10.a5 Rac8 11.Rfb1 Ba4 12.Qd1 Bb5 13.Qf3 Rh8 14.h3 Rhe8 15.Qf4 Red8 16.Bc5 Rg8 17.Qf3 Rge8 18.Qg4 Kg8
 37/48	05:59	 3.310.681k	9.212k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 b6 5.Nf4 Nxf4 6.Bxf4 Qc7 7.Bc1 Qd8 8.Qg4 Kf8 9.Ba3+ Kg8 10.Bd6 Kh7 11.Qf4 Qe8 12.a5 Ba4 13.Ra2 b5 14.Rb1 Rc8 15.Rab2 Qd7 16.Bb4 Rhd8 17.h3 a6 18.Qf3 Kg8 19.Qg3 Kh7 20.Ra1 Qc7
 38/52	07:00	 3.893.655k	9.265k	+0,10	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 Qc7 5.a5 Qd8 6.Bc1 0-0 7.Nf4 Nxf4 8.Bxf4 Qe7 9.Rfe1 Kh7 10.Bc1 Qe8 11.Ba3 Rg8 12.Bc5 Bc6 13.Reb1 Qd7 14.Bd6 Ba4 15.Rb2 Bc6 16.Qe2 Rgd8 17.Qf3 Bb5 18.Rbb1 Ba4 19.Rb2 Re8
 39/52+	13:21	 7.328.569k	9.146k	+0,17	1.Nh4
 39/58	23:11	 12.664.522k	9.099k	+0,12	1.Nh4 0-0 2.Qg4 Ng6 3.Nxg6 fxg6 4.Bc1 Rf5 5.Bxc6 Bxc6 6.a5 Qd8 7.f4 Bb5 8.Bd2 b6 9.Rfb1 a6 10.axb6 Qxb6 11.Ra2 Qd8 12.Bc1 Bd7 13.Qg3 Be8 14.Qf3 a5 15.Rab2 a4 16.Rb6 Bd7 17.g4 Rf7 18.Ba3 h6 19.Kg2 Qh4 20.Qg3 g5 21.Qxh4 gxh4 22.Rd6 g5
 40/58	27:21	 14.978.224k	9.124k	+0,13	1.Nh4 0-0 2.Qg4 Ng6 3.Rfe1 Nce7 4.Nxg6 fxg6 5.Reb1 a6 6.Bxd7 Qxd7 7.Bg5 Nc8 8.Bc1 b6 9.f3 Rb8 10.g3 Na7 11.f4 Rb7 12.Kg2 Nc8 13.Qe2 Rf7 14.Ba3 Rf5 15.Kg1 Rf7 16.Qg4 Rf5 17.Qd1 Na7 18.Bc1 Nc8 19.Kg2 Rf7 20.Ba3 Rf5 21.Qe2 Rf7
Even longer the 2nd time 19m14s :

Code: Select all

Stockfish_15090721_x64_modern:
...
 34/42	01:33	 840.010k	8.994k	+0,12	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 b6 5.Nf4 Nxf4 6.Bxf4 Qc7 7.Bc1 Qd8 8.Qg4 Kf8 9.Ba3+ Kg8 10.Bd6 Bc6 11.Rfb1 Kh7 12.Qf4 Qd7 13.a5 b5 14.a6 Rac8 15.Qg3 Rhg8 16.Bc5 Qc7 17.Qf3 Qd7 18.Qg4 Rgd8 19.h3
 35/42-	01:53	 1.024.649k	9.015k	+0,06	1.Ng5 h6
 35/45+	02:01	 1.090.676k	9.001k	+0,12	1.Ng5
 35/45	02:16	 1.232.029k	9.003k	+0,12	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 Qc8 5.a5 b5 6.Nf4 Nxf4 7.Bxf4 Kf8 8.a6 Rb8 9.Bc1 Kg8 10.Ba3 Rb6 11.Bc5 Rxa6 12.Bxa7 Ra4 13.Bc5 Qa8 14.Rab1 Ra2 15.Rfc1 Bc6 16.h4 Qe8 17.Ra1 Ra4 18.Rxa4 bxa4 19.Rb1
 36/45	02:33	 1.380.613k	8.990k	+0,12	1.Ng5 h6 2.Qh5 Ng6 3.Bxc6 Qxc6 4.Nh3 Qc8 5.a5 b5 6.Nf4 Nxf4 7.Bxf4 Kf8 8.a6 Rb8 9.Bc1 Kg8 10.Qh4 Kh7 11.Qe7 Kg6 12.Ba3 Re8 13.Qh4 Kh7 14.Qh5 Kg8 15.Bc5 Ra8 16.Qg4 Bc6 17.Rfb1 Kh7 18.Bd6 Qd7 19.Qg3
 37/57+	19:14	 9.804.732k	8.492k	+0,18	1.Nh4
 37/57	19:43	 10.068.948k	8.508k	+0,18	1.Nh4 Qa5 2.Qg4 Ng6 3.Nxg6 hxg6 4.Rfb1 a6 5.Bxc6 Bxc6 6.Qd1 Rh5 7.Qe1 Kf8 8.h3 Kg8 9.Be3 Re8 10.Rb4 Qc7 11.a5 Bb5 12.Rbb1 Rc8 13.Qd1 Qd8 14.Bd2 Qd7 15.Qc1 Qd8 16.Qe1 Rh8 17.f3 Rh5 18.Be3 b6 19.axb6 Qxb6
 38/57	20:56	 10.732.584k	8.544k	+0,18	1.Nh4 Qa5 2.Qg4 Ng6 3.Nxg6 hxg6 4.Rfb1 a6 5.Bxc6 Bxc6 6.Qd1 Rh5 7.Qe1 Kf8 8.h3 Kg8 9.Be3 Re8 10.Rb4 Qc7 11.a5 Bb5 12.Rbb1 Rc8 13.Qd1 Qd8 14.Bd2 Qd7 15.Qc1 Qd8 16.Qe1 Rh8 17.Be3 Rh5 18.Qc1 g5 19.Qe1 Rh8 20.Qe2
 39/57	22:28	 11.589.892k	8.591k	+0,18	1.Nh4 Qa5 2.Qg4 Ng6 3.Nxg6 hxg6 4.Rfb1 a6 5.Bxc6 Bxc6 6.Qd1 Rh5 7.Qe1 Kf8 8.h3 Kg8 9.Be3 Re8 10.Rb4 Qc7 11.a5 Bb5 12.Rbb1 Rc8 13.Qd1 Qd8 14.Bd2 Qd7 15.Qc1 Qd8 16.Qe1 Rh8 17.Qd1 Rh5 18.Be3 Rh4 19.Qc1 Rh5 20.Qa3 Rb8
My Stockfish was lucky---33 seconds:

Code: Select all

info depth 34 seldepth 40 multipv 1 score cp 6 lowerbound nodes 819732530 nps 24478396 hashfull 188 tbhits 0 time 33488 pv f3h4
info depth 34 currmove f3h4 currmovenumber 1
info depth 34 seldepth 44 multipv 1 score cp 12 lowerbound nodes 1275832074 nps 25943146 hashfull 281 tbhits 0 time 49178 pv f3h4
info depth 34 currmove f3h4 currmovenumber 1
info depth 34 currmove d1b1 currmovenumber 5
info depth 34 currmove d1e1 currmovenumber 7
info depth 34 currmove d2g5 currmovenumber 9
info depth 34 currmove a4a5 currmovenumber 10
info depth 34 currmove a1a2 currmovenumber 11
info depth 34 currmove g2g3 currmovenumber 12
info depth 34 currmove d2e1 currmovenumber 13
info depth 34 seldepth 47 multipv 1 score cp 12 nodes 2754705294 nps 27718910 hashfull 609 tbhits 0 time 99380 pv f3h4 e8g8 f1e1 a7a6 b5c6 d7c6 a4a5 c7d7 e1e3 c6a4 e3g3 e7g6 h4g6 f7g6 d1b1 a4b5 d2c1 f8f5 c1a3 d7f7 b1e1 g6g5 h2h3 f7g6 a3d6 h7h5 g3e3 f5f7 e1e2 a8e8 f2f3 b5c6 a1b1 c6b5
info depth 35 currmove f3h4 currmovenumber 1
info depth 35 currmove d2g5 currmovenumber 5
info depth 35 currmove f1e1 currmovenumber 9
info depth 35 currmove a1a3 currmovenumber 10
info depth 35 currmove g2g3 currmovenumber 11
info depth 35 currmove d1b1 currmovenumber 12
info depth 35 currmove d1e2 currmovenumber 13
info depth 35 currmove h2h4 currmovenumber 14
info depth 35 currmove h2h3 currmovenumber 15
info depth 35 currmove b5a6 currmovenumber 16
info depth 35 currmove f3e1 currmovenumber 17
info depth 35 currmove a4a5 currmovenumber 18
info depth 35 currmove a1c1 currmovenumber 19
info depth 35 seldepth 47 multipv 1 score cp 12 nodes 3570230805 nps 28022469 hashfull 717 tbhits 0 time 127406 pv f3h4 e8g8 f1e1 f7f5 e5f6 f8f6 d2g5 f6f7 g5e7 c6e7 d1e2 f7f6 e2e5 c7d8 e5d6 d7e8 d6d8 a8d8 b5e8 d8e8 h4f3 e7c6 f3e5 c6e5 e1e5 f6f5 e5e1 g8f7 a4a5 e8b8 f2f3 f7e7 a1b1 f5f8 g1f2 e7d6 h2h3 b7b6 a5b6 b8b6
info depth 36 currmove f3h4 currmovenumber 1
info depth 36 currmove f1e1 currmovenumber 5
info depth 36 seldepth 47 multipv 1 score cp 10 nodes 4003113346 nps 28063270 hashfull 763 tbhits 0 time 142646 pv f3h4 e8g8 f1e1 f7f5 e5f6 f8f6 d2g5 f6f7 g5e7 c6e7 d1e2 d7c8 a4a5 f7f6 g2g3 c8d7 b5d7 c7d7 h4f3 a8f8 f3e5 d7c8 f2f3 e7f5 e1b1 f5d6 g1g2 g8h8 e2e1 h8g8 e1c1 d6f7 f3f4 f7d6 a5a6 b7a6
info depth 37 currmove f3h4 currmovenumber 1
info depth 37 seldepth 47 multipv 1 score cp 17 lowerbound nodes 4736331218 nps 28250462 hashfull 837 tbhits 0 time 167655 pv f3h4
info depth 37 currmove f3h4 currmovenumber 1
info depth 37 seldepth 50 multipv 1 score cp 23 lowerbound nodes 8750492430 nps 29081838 hashfull 982 tbhits 0 time 300892 pv f3h4
info depth 37 currmove f3h4 currmovenumber 1
info depth 37 currmove a1b1 currmovenumber 5
info depth 37 currmove d1e2 currmovenumber 6
info depth 37 currmove g2g3 currmovenumber 17
info depth 37 currmove a1a2 currmovenumber 18
info depth 37 currmove d2e1 currmovenumber 21
info depth 37 currmove d2h6 currmovenumber 22
info depth 37 currmove d1c1 currmovenumber 23
info depth 37 currmove f1e1 currmovenumber 24
info depth 37 currmove a1a3 currmovenumber 25
info depth 37 currmove b5c6 currmovenumber 26
info depth 37 seldepth 52 multipv 1 score cp 17 upperbound nodes 10172531032 nps 29237880 hashfull 990 tbhits 0 time 347923 pv f3h4 e7g6
info depth 37 currmove f3h4 currmovenumber 1
info depth 37 currmove d1b1 currmovenumber 4
info depth 37 currmove h2h3 currmovenumber 17
info depth 37 currmove d1e2 currmovenumber 18
info depth 37 currmove a1c1 currmovenumber 19
info depth 37 currmove a1a2 currmovenumber 20
info depth 37 currmove f1e1 currmovenumber 21
info depth 37 currmove h2h4 currmovenumber 22
info depth 37 currmove d2e1 currmovenumber 23
info depth 37 currmove a1a3 currmovenumber 24
info depth 37 currmove d2g5 currmovenumber 25
info depth 37 currmove b5c6 currmovenumber 26
info depth 37 currmove b5c4 currmovenumber 27
info depth 37 seldepth 52 multipv 1 score cp 22 nodes 11975781031 nps 29509644 hashfull 996 tbhits 0 time 405826 pv f3h4 e7g6 d1g4 e8g8 h4g6 f7g6 d2c1 a7a6 b5c6 c7c6 a4a5 f8f7 a1a2 a8e8 f2f4 c6c7 c1e3 d7b5 f1b1 b7b6 a5b6 c7b6 e3c1 f7b7 b1a1 b6c6 a2a5 c6b6 g2g3 b6c7 g1g2 c7b6 c1e3 b6c6 g4h4 c6b6 a5a2 e8b8
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Nh4 is hard to find, but the stats will tell you it is r

Post by kgburcham »

[D] r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq -

Engine: Stockfish 100915 64 BMI2 (8192 MB)
by Tord Romstad, Marco Costalba and Joona
1/01 0:00 +0.79 1.Bg5 (36) 36
2/02 0:00 +0.67 1.Bg5 a6 (98) 49
3/03 0:00 +0.57 1.Bg5 a6 2.Bxc6 Bxc6 (236) 118
4/04 0:00 +0.44 1.Rb1 a6 2.Bxc6 Bxc6 (843) 421
5/05 0:00 +0.36 1.Re1 h6 2.h3 a6 3.Bxc6 Bxc6 (2.124) 708
6/06 0:00 +0.01 1.Bxc6 Bxc6 2.a5 O-O 3.a6 bxa6 (3.771) 1257
7/07 0:00 -0.10 1.Bxc6 Nxc6 2.h3 O-O 3.Rb1 h6 4.Re1 (5.985) 1496
8/08 0:00 -0.09 1.Bxc6 Bxc6 2.Bg5 O-O 3.Bxe7 Qxe7 4.Re1 h6 (7.956) 1989
9/09 0:00 -0.07 1.Qb1 O-O 2.a5 a6 3.Bxc6 Nxc6 4.Qb6 Qxb6 5.axb6 (21.816) 3636
10/13 0:00 -0.01 1.Qc1 O-O 2.Qa3 h6 3.Qd6 Rfc8 4.Qxc7 Rxc7 5.Rfb1 a6 6.Bxc6 Bxc6 (48.124) 4374
11/13 0:00 +0.06 1.Qc1 O-O 2.Qa3 a6 3.Bxc6 Bxc6 4.Rfb1 h6 5.Qd6 Qd8 6.a5 Rc8 (87.496) 5468
12/14 0:00 +0.07 1.Qc1 O-O 2.Qa3 a6 3.Bxc6 Bxc6 4.Rfb1 Rad8 5.Bg5 f6 6.exf6 gxf6 7.Bh6 Rf7 (103.959) 5775
13/15 0:00 +0.03 1.Qc1 Rc8 2.Qa3 O-O 3.Rfb1 a6 4.Bxc6 Bxc6 5.Qd6 h6 6.a5 Rfd8 7.Qxc7 (154.759) 6448
14/17 0:00 -0.05 1.Qc1 O-O 2.Qa3 h6 3.Rfb1 Nf5 4.a5 a6 5.Bxc6 Bxc6 6.Rb6 Bb5 7.h3 Rfc8 (336.718) 8017
15/18 0:00 -0.01 1.Qc1 O-O 2.Qa3 a6 3.Bxc6 Bxc6 4.Rfb1 Rad8 5.Bg5 f6 6.Bd2 h6 7.exf6 Rxf6 8.a5 Ng6 (493.231) 8653
16/20 0:00 -0.02 1.Qc1 O-O 2.Qa3 a6 3.Bxc6 Bxc6 4.Rfb1 Rfe8 5.Bg5 Ng6 6.h4 h6 7.h5 Ne7 8.Bxe7 Rxe7 9.a5 (700.059) 9334
17/21 0:00 -0.05 1.Qc1 h6 2.Qa3 a6 3.Bxc6 Bxc6 4.Rfb1 Rd8 5.h3 O-O 6.Qc5 Qd7 7.Qa3 Rfe8 8.Rb6 Qc7 9.Rab1 Nf5 (1.301.477) 10667
18/21 0:00 -0.05 1.Qc1 h6 2.Qa3 a6 3.Bxc6 Bxc6 4.Rfb1 Rd8 5.h3 O-O 6.Qc5 Qd7 7.Qa3 Rfe8 8.Rb6 Nf5 9.Rab1 Rc8 10.a5 (1.727.708) 10934
19/21 0:00 -0.01 1.Qc1 O-O 2.Qa3 a6 3.Bxc6 Bxc6 4.Rfb1 Rfe8 5.Qd6 Qc8 6.Rb6 Nf5 7.Qb4 Qc7 8.Rb1 h6 9.g3 Rad8 10.a5 (2.440.431) 11403
20/28 0:00 -0.05 1.Qc1 h6 2.Qa3 a6 3.Bxc6 Bxc6 4.Rfb1 Rd8 5.h3 O-O 6.Qc5 Qd7 7.Qa3 Nf5 8.Rb6 Rb8 9.g4 Ne7 10.Qd6 Qe8 11.a5
(3.875.240) 11997
21/28 0:00 -0.02 1.Qc1 h6 2.Qa3 a6 3.Bxc6 Bxc6 4.Rfb1 Rd8 5.h3 O-O 6.Qc5 Qd7 7.Qa3 Rfe8 8.Rb6 Rb8 9.a5 Nf5 10.g4 Ne7 11.Qd6 Qc8
(4.732.111) 12259
22/28 0:01 -0.08 1.Qc1 h6 2.Re1 Rc8 3.Qa3 a6 4.Bxc6 Bxc6 5.Reb1 Rd8 6.Rb2 O-O 7.Qc5 Rd7 8.Rb6 Re8 9.h3 Nf5 10.a5 Qd8 11.g3 Bb5 (17.145.155) 13532
23/28 0:01 -0.08 1.Qc1 h6 2.Re1 Rc8 3.Qa3 a6 4.Bxc6 Bxc6 5.Reb1 Rd8 6.Rb2 O-O 7.Qc5 Rd7 8.Rb6 Nc8 9.Rb2 Re8 10.Rbb1 Ne7 11.Rb6 Nf5 12.h3 Qd8 (23.781.829) 13489
24/31 0:03 -0.10 1.Qc1 h6 2.Re1 Rc8 3.g3 Rd8 4.Kg2 Qa5 5.Bxc6 Bxc6 6.Qa3 Rd7 7.Reb1 O-O 8.Qb4 Qd8 9.Qa3 Re8 10.h4 Qa5 11.Qb4 Qc7 12.a5 Rb8 13.Qc5 (54.442.472) 14211
25/31 0:07 -0.03++ 1.Bc1 (117.556.115) 14746
25/31 0:09 0.00 1.Bc1 O-O 2.Ba3 Rfe8 3.Bd6 Qd8 4.Qd2 Nf5 5.Rfb1 b6 6.Ba6 Bc8 7.Bb5 Bd7 (134.843.068) 14801
26/33 0:09 0.00 1.Bc1 O-O 2.Ba3 Rfe8 3.Bd6 Qd8 4.Qd2 Nf5 5.Bb4 Nfe7 6.Bd6 (139.371.251) 14798
27/33 0:09 0.00 1.Bc1 O-O 2.Ba3 Rfe8 3.Bd6 Qd8 4.Qd2 Nf5 5.Bb4 Nfe7 6.Bd6 (145.161.270) 14764
28/33 0:10 0.00 1.Bc1 O-O 2.Ba3 Rfe8 3.Bd6 Qd8 4.Qd2 Nf5 5.Bb4 Nfe7 6.Bd6 (151.274.444) 14780
29/38 0:22 +0.06++ 1.Ng5 (341.648.676) 15315
29/38 0:24 +0.12++ 1.Ng5 (374.539.363) 15298
29/38 0:28 +0.06-- 1.Ng5 h6 (432.331.882) 15308
29/43 0:38 +0.10 1.Nh4 O-O 2.Qg4 Qa5 3.Bh6 Ng6 4.Nxg6 fxg6 5.Bd2 Rae8 6.Rfb1 a6 7.Bxc6 Bxc6 8.Qd1 Rf7 9.Rb4 Ref8 10.f4 Rf5 11.Be3 R5f7 12.h3 Re8 13.g4 b6 14.Rab1 (595.503.279) 15279
30/43 0:42 +0.10 1.Nh4 O-O 2.Qg4 Qa5 3.Bh6 Ng6 4.Nxg6 fxg6 5.Bd2 Rae8 6.Rfb1 Rf5 7.f4 Rf7 8.Qd1 Ref8 9.Qc1 a6 10.Bxc6 Bxc6 11.Qa3 Qc7 12.Be3 Qa5 13.Qb4 Qxb4 14.cxb4 (650.619.856) 15270
31/44 0:53 +0.04-- 1.Nh4 O-O (822.070.288) 15282
31/44 0:55 +0.10++ 1.Nh4 (854.685.944) 15300
31/44 1:25 +0.18 1.Nh4 O-O 2.Qg4 a6 3.Bxc6 Qxc6 4.Rfe1 b5 5.Bg5 Ng6 6.a5 Qc8 7.Nxg6 fxg6 8.Be7 Rf7 9.Bb4 Bc6 10.Re3 Qd7 11.f4 Rf5
12.Rf3 Qe8 13.Rb1 Qf7 14.Bd6 (1.314.364.328) 15401
32/44 1:39 +0.12-- 1.Nh4 O-O (1.529.225.299) 15412
32/44 1:43 +0.18++ 1.Nh4 (1.593.622.556) 15407
32/46 1:56 +0.12-- 1.Nh4 O-O (1.795.886.414) 15445
32/46 2:10 +0.13 1.Nh4 O-O 2.Qg4 Rfe8 3.Rfe1 Ng6 4.Bxc6 Bxc6 5.Nxg6 fxg6 6.a5 Bd7 7.Bc1 b6 8.axb6 axb6 9.Ba3 Ra4 10.Bd6 Qa7 11.Rxa4 Qxa4 12.Qe2 Ra8 13.Rb1 Qa5 14.Qe1 (2.020.181.899) 15491
33/46 2:25 +0.14 1.Nh4 Ng6 2.Nxg6 hxg6 3.Qc1 b6 4.Qa3 a6 5.Bxc6 Bxc6 6.Rfe1 Qe7 7.Qb4 Qxb4 8.cxb4 Ke7 9.h3 f6 10.a5 b5 11.f3 Kf7
12.Kf2 Rac8 13.c3 Rb8 14.Rad1 (2.262.126.052) 15526
34/46 3:08 +0.20++ 1.Nh4 (2.939.339.920) 15626
34/48 3:15 +0.20 1.Nh4 Ng6 2.Nxg6 hxg6 3.Qc1 b6 4.Re1 a6 5.Bxc6 Bxc6 6.Bg5 Ra7 7.h4 Kf8 8.Qa3+ Kg8 9.a5 b5 10.Qc5 Rb7 11.g3 Kh7
12.Kg2 Qc8 13.Rab1 Kg8 14.g4 (3.058.313.116) 15627
35/48 3:33 +0.20 1.Nh4 Ng6 2.Nxg6 hxg6 3.Qc1 b6 4.f3 a6 5.Bxc6 Bxc6 6.Bg5 Ra7 7.Re1 Kf8 8.Qa3+ Kg8 9.a5 b5 10.Qc5 Ra8 11.Qb6 Qd7
12.h4 Kh7 13.Kf2 Kg8 14.Rab1 (3.342.047.827) 15643
36/48 4:05 +0.14-- 1.Nh4 Ng6 (3.833.133.958) 15630
36/48 4:51 +0.20++ 1.Nh4 (4.549.618.115) 15592
36/50 5:06 +0.14-- 1.Nh4 Ng6 (4.778.242.476) 15605
36/50 7:01 +0.22++ 1.Nh4 (6.603.449.995) 15668
36/53 7:32 +0.22 1.Nh4 Ng6 2.Nxg6 hxg6 3.Bxc6 Bxc6 4.a5 Qd8 5.Be3 Kf8 6.Qe2 Rh5 7.Rfb1 Rb8 8.h3 Kg8 9.Qf3 Rf5 10.Qd1 Rh5 11.Qc1 Qe7
12.Qd2 Rc8 13.Qd1 Qd8 14.Qc1 (7.112.704.237) 15706
37/53 8:35 +0.16-- 1.Nh4 h6 (8.109.808.667) 15733
37/53 10:14 +0.20 1.Nh4 Ng6 2.Nxg6 hxg6 3.Bxc6 Bxc6 4.a5 Qd8 5.Be3 Kf8 6.h3 Qh4 7.Qe2 Qh5 8.f3 Kg8 9.Bc1 Qh4 10.Ba3 g5 11.Qd2 Qg3
12.Qe1 Qxe1 13.Rfxe1 Kh7 14.Be7 (9.648.772.363) 15710
38/53 10:42 +0.20 1.Nh4 Ng6 2.Nxg6 hxg6 3.Bxc6 Bxc6 4.a5 Qd8 5.Be3 Kf8 6.h3 Qh4 7.Qe2 Qh5 8.f3 Kg8 9.Bc1 Qh4 10.Ba3 g5 11.Qd2 Qg3
12.Qe1 Qxe1 13.Rfxe1 Kh7 14.Rab1 (10.107.122.531) 15721
39/53 11:30 +0.20 1.Nh4 Ng6 2.Nxg6 hxg6 3.Bxc6 Bxc6 4.a5 Qd8 5.Be3 Kf8 6.h3 Qh4 7.Qe2 Qh5 8.f3 Kg8 9.Bc1 Qh4 10.Ba3 g5 11.Qd2 Qg3
12.Qe1 Qxe1 13.Rfxe1 Kh7 14.Rab1 (10.856.603.479) 15717
40/55 17:04 +0.20 1.Nh4 Ng6 2.Nxg6 hxg6 3.Bxc6 Qxc6 4.a5 b5 5.Bg5 a6 6.h4 Kf8 7.Qc1 Kg8 8.g3 Re8 9.Kg2 Qc7 10.Qa3 Bc6 11.Rfe1 Qc8
12.Qc5 Qb7 13.Qb6 Rc8 14.Rab1 (16.159.843.362) 15776
41/55 18:05 +0.20 1.Nh4 Ng6 2.Nxg6 hxg6 3.Bxc6 Qxc6 4.a5 b5 5.Bg5 a6 6.h4 Kf8 7.Qc1 Kg8 8.g3 Re8 9.Kg2 Qc7 10.Qa3 Bc6 11.Rfe1 Qc8
12.Qc5 Qb7 13.Qb6 Rc8 14.Rab1 (17.128.526.239) 15778
42/55 20:07 +0.20 1.Nh4 Ng6 2.Nxg6 hxg6 3.Bxc6 Qxc6 4.a5 b5 5.Bg5 a6 6.h4 Kf8 7.Qc1 Kg8 8.g3 Re8 9.Kg2 Qc7 10.Qa3 Bc6 11.Rfe1 Qc8
12.Qc5 Qb7 13.Qb6 Rc8 14.Rab1 (19.044.289.612) 15777
no chess program was born totally from one mind. all chess programs have many ideas from many minds.
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WonderSlug
Posts: 2
Joined: Thu Feb 06, 2014 9:40 am
Location: San Diego, CA, USA

Re: Nh4 is hard to find, but the stats will tell you it is r

Post by WonderSlug »

For the first position:

[d]r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq -


One of my little laptops found it in a few minutes.

System: Asus 552 laptop (~$500 USD) running Windows 10

CPU: Intel Core i5-4210U (2 cores, HT 4 threads) @ 2.40 GHz

RAM: 8 GB RAM, Aren

GUI: Arena 3.5

Engine: SF 060915 64 BMI2 with 512 MB Hash, 3 cores enabled.


Nh4 confirmed as best after 4m 43 sec and depth 32


Image[/img]
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MMoisan
Posts: 70
Joined: Thu Sep 13, 2012 1:42 am

Re: Nh4 is hard to find, but the stats will tell you it is r

Post by MMoisan »

Nh4 is Zappa 1.1 favorite move:

Code: Select all


New game
r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq - 0 1

Analysis by Zappa 1.1:

1.Ng5 0-0 2.Qh5 h6 3.Nf3 a6 4.Bxc6 Nxc6 
  =  (0.15)   Depth: 7   00:00:00  51kN
1.Bxc6 Bxc6 2.a5 0-0 3.Re1 Nf5 4.Ng5 
  =  (0.16)   Depth: 7   00:00:00  58kN
1.Re1 0-0 2.Bg5 Nf5 3.g4 Nfe7 4.a5 
  =  (0.25)   Depth: 7   00:00:00  89kN
1.Re1 0-0 2.Bg5 Nf5 3.g4 Nfe7 4.a5 
  =  (0.25)   Depth: 7   00:00:00  98kN
1.Re1 0-0 2.Bg5 Nf5 3.g4 Nfe7 4.a5 Rac8 
  =  (0.12)   Depth: 8   00:00:00  148kN
1.Nh4 0-0 2.Qg4 f5 3.Qg5 a6 4.Bxc6 Nxc6 
  =  (0.18)   Depth: 8   00:00:00  378kN
1.Nh4 0-0 2.Qg4 f5 3.Qg5 a6 4.Bxc6 Nxc6 
  =  (0.18)   Depth: 8   00:00:00  428kN
1.Nh4 0-0 2.Qg4 Rac8 3.Rfb1 Na5 4.Bh6 Ng6 5.Nxg6 fxg6 
  =  (0.24)   Depth: 9   00:00:00  772kN
1.Nh4 0-0 2.Qg4 Rac8 3.Rfb1 Na5 4.Bh6 Ng6 5.Nxg6 fxg6 
  =  (0.24)   Depth: 9   00:00:00  881kN
1.Nh4 0-0 2.Qh5 Na5 3.f4 Bxb5 4.axb5 Qb6 5.Qg5 Ng6 
  =  (0.18)   Depth: 10   00:00:01  1826kN
1.Nh4 0-0 2.Qh5 Na5 3.f4 Bxb5 4.axb5 Qb6 5.Qg5 Ng6 
  =  (0.18)   Depth: 10   00:00:01  2641kN
1.Nh4 0-0 2.Qh5 Ng6 3.Rfb1 Nce7 4.Bxd7 Qxd7 5.a5 Rac8 6.Nf3 
  =  (0.29)   Depth: 11   00:00:02  5352kN
1.Nh4 0-0 2.Qh5 Ng6 3.Rfb1 Nce7 4.Bxd7 Qxd7 5.a5 Rac8 6.Nf3 
  =  (0.29)   Depth: 11   00:00:02  5792kN
1.Nh4 0-0 2.Qh5 Na5 3.Bg5 Ng6 4.f4 Bxb5 5.axb5 Nxh4 6.Bxh4 Rac8 
  =  (0.23)   Depth: 12   00:00:04  10136kN
1.Nh4 0-0 2.Qh5 Na5 3.Bg5 Ng6 4.f4 Bxb5 5.axb5 Nxh4 6.Bxh4 Rac8 
  =  (0.23)   Depth: 12   00:00:04  12495kN
1.Nh4 0-0 2.Qg4 Na5 3.Bg5 Ng6 4.Nxg6 fxg6 5.Kh1 Rae8 6.f3 Bxb5 7.axb5 
  =  (0.25)   Depth: 13   00:00:10  30173kN
1.Nh4 0-0 2.Qg4 Na5 3.Bg5 Ng6 4.Nxg6 fxg6 5.Kh1 Rae8 6.f3 Bxb5 7.axb5 
  =  (0.25)   Depth: 13   00:00:11  32151kN
1.Nh4 0-0 2.Qg4 Na5 3.Rfe1 Bc8 4.Bh6 Ng6 5.Bc1 a6 6.Ba3 axb5 7.Bxf8 Kxf8 8.axb5 Nxh4 9.Qxh4 
  =  (0.16)   Depth: 14   00:00:17  52808kN
1.Nh4 0-0 2.Qg4 Na5 3.Rfe1 Bc8 4.Bh6 Ng6 5.Bc1 a6 6.Ba3 axb5 7.Bxf8 Kxf8 8.axb5 Nxh4 
  =  (0.16)   Depth: 14   00:00:27  83986kN
1.Nh4 0-0 2.Qg4 Na5 3.Bxd7 Qxd7 4.Bg5 Kh8 5.f4 f5 6.exf6 gxf6 7.Bh6 Rg8 8.Qh5 
  =  (0.23)   Depth: 15   00:00:43  135MN
1.Nh4 0-0 2.Qg4 Na5 3.Bxd7 Qxd7 4.Bg5 Kh8 5.f4 f5 6.exf6 gxf6 7.Bh6 Rg8 8.Qh5 
  =  (0.23)   Depth: 15   00:00:46  144MN
1.Nh4 0-0 2.Qg4 Na5 3.Bh6 Ng6 4.Bg5 Kh8 5.Nxg6+ fxg6 6.Be7 Rf5 7.Bd6 Qd8 8.Kh1 Bxb5 
  =  (0.20)   Depth: 16   00:01:14  235MN
1.Nh4 0-0 2.Qg4 Na5 3.Bh6 Ng6 4.Bg5 Kh8 5.Nxg6+ fxg6 6.Be7 Rf5 7.Bd6 Qd8 8.Kh1 Bxb5 
  =  (0.20)   Depth: 16   00:01:41  318MN
1.Nh4 0-0 2.Bg5 Ng6 3.Nxg6 fxg6 4.Qg4 Rae8 5.Kh1 Ne7 6.Bxe7 Rxe7 7.f3 Ree8 8.Rfb1 Bxb5 9.axb5 
  =  (0.20)   Depth: 17   00:06:15  1082MN
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Nh4 is hard to find, but the stats will tell you it is right

Post by Vinvin »

Dann Corbit wrote: ↑Thu Sep 10, 2015 9:27 pm [d]r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq - acd 43/61; acs 6451 ; acn 49590987888; ce 18 ; bm Nh4; pv Nh4 O-O Qg4 Ng6 Nxg6 fxg6 Bc1 Rf5 Bxc6 Bxc6 a5 a6 f4 Bb5 Re1 Qd8 h3 Qc7 Bb2 Re8 Reb1 Qf7 Rf1 Qc7 g3 b6 axb6 Qxb6 Rfb1 a5 Kg2 Rf7 Ba3 a4 h4 Qa5 Bd6 Bc6 Ra3 Rb7 Rxb7 Bxb7 Bb4 Qb5 Ra1 Qd7;
Is this position valid today ?
Nh4 is no more the strongest move for SF (3 best moves after 1 hour on 6 cores) :

Code: Select all

Stockfish_19081422_x64_modern:
...
 39/92	40:47	17 772 992 904	7 262 226	+0,37	1.Nh4 0-0 2.Bxc6 Nxc6 3.Bg5 h6 4.Bc1 Qd8 5.Qh5 Ne7 6.Ba3 Be8 7.Qg4 a5 8.Bd6 Bd7 9.Rfb1 Bc6 10.f4 Qd7 11.Rf1 f5 12.Qh5 Qd8 13.Ba3 b6 14.Rfb1 Be8 15.Qf3 Kh7 16.Bd6 Kg8 17.Kh1 Ra7 18.g4 fxg4 19.Qxg4 Nf5 20.Bxf8 Nxh4 21.Ba3 Nf5 22.Bd6 Rf7 23.h3 Nxd6 24.exd6 Qxd6
 39/65	40:47	17 772 992 904	7 262 226	+0,40	1.Bc1 b6 2.Nh4 Ng6 3.Qh5 Nce7 4.Ba3 Qd8 5.Nxg6 fxg6 6.Qg5 Kf7 7.Rfb1 Nf5 8.Qc1 Bxb5 9.Rxb5 Qd7 10.Qf4 Kg8 11.Qg5 Qf7 12.Rab1 h6 13.Qc1 g5 14.a5 Kh7 15.Bd6 Nh4 16.Qf1 Qf4 17.R1b2 Qg4 18.h3 Nf3+ 19.Kh1 Nd2 20.hxg4 Nxf1 21.Kg1 Nd2 22.axb6 axb6 23.Rxb6 Ne4
 39/56	40:47	17 772 992 904	7 262 226	+0,69	1.Bxc6 Nxc6 2.Bc1 Qa5 3.Qd2 Ne7 4.Nh4 0-0 5.Ba3 Rfe8 6.Bb4 Qd8 7.a5 b6 8.Nf3 h6 9.Rfb1 bxa5 10.Bxa5 Qc8 11.h4 Nc6 12.Bb4 a5 13.Bd6 a4 14.g4 Ne7 15.h5 Qd8 16.Bc5 Rb8 17.Qf4 Rxb1+ 18.Rxb1 Bc6 19.g5 hxg5 20.Qxg5 Nf5
---------------------------------------------------------------------------
 40/57	1:02:22	26 924 247 398	7 194 181	+0,33	1.Nh4 0-0 2.Bxc6 Nxc6 3.Bg5 h6 4.Bc1 Qd8 5.Qh5 Ne7 6.Ba3 Be8 7.Qg4 a5 8.Rfb1 Bc6 9.f4 Qd7 10.Rf1 f5 11.Qh5 Qe8 12.g4 Qxh5 13.gxh5 Rfe8 14.Bxe7 Rxe7 15.Rfb1 Ree8 16.Rb6 Reb8 17.Ng6 Kf7 18.Kf2 Ra6 19.Rxa6 bxa6 20.Ke3 Rb2 21.Kd2 Be8 22.Kc1 Rb7 23.h3
 40/69	1:02:22	26 924 247 398	7 194 181	+0,41	1.h4 h6 2.Bc1 a6 3.Bxc6 Bxc6 4.a5 Bb5 5.h5 0-0-0 6.Nh2 Nf5 7.Ng4 Rdg8 8.g3 Kb8 9.Kg2 Ka8 10.Rh1 Rc8 11.Qd2 Rcg8 12.Qf4 Re8 13.Re1 Rhg8 14.Qf3 Qd8 15.Rh1 Bc6 16.Qd1 Rh8 17.Be3 Qd7 18.Bf4 Bb5 19.Bc1 Qd8 20.Qf3 Reg8 21.Ba3 Ba4 22.Ra2 Bb5 23.Bb4 Qg5 24.Qe2 Rc8 25.Raa1 Rhg8 26.Ba3 Rh8 27.Bc5 Rxc5 28.dxc5 Bc6
 40/61	1:02:22	26 924 247 398	7 194 181	+0,59	1.Bc1 b6 2.Nh4 Ng6 3.Qg4 Nce7 4.Ba3 a6 5.Bxd7+ Qxd7 6.Rfb1 Rb8 7.Nf3 Qd8 8.Bd6 h5 9.Qg5 Rb7 10.Bc5 Rb8 11.Bxe7 Qxe7 12.Qg3 Kd7 13.h3 Kc7 14.Ng5 Kb7 15.Rf1 h4 16.Qg4 Rbe8 17.f4 f5 18.Qf3 Ka7 19.Kh2 Qd7 20.Qe3 Qe7 21.Rfb1 Rb8 22.Re1 Qd7 23.a5 b5
---------------------------------------------------------------------------
 41/80	1:03:41	27 473 247 141	7 188 927	+0,41	1.h4 h6 2.Bc1 a6 3.Bxc6 Bxc6 4.a5 Bb5 5.h5 0-0-0 6.Nh2 Nf5 7.Ng4 Rdg8 8.g3 Kb8 9.Kg2 Ka8 10.Rh1 Rc8 11.Qf3 Qd8 12.Be3 Qe7 13.Bf4 Qd8 14.Bc1 Bc6 15.Qd1 Qe7 16.Ba3 Qg5 17.Qe2 Bb5 18.Bb4 Rhg8 19.Qf3 Qd2 20.Qd1 Qg5 21.Qe2 Kb8 22.Ne3 Nxe3+ 23.Qxe3 Qxe3
 41/57	1:03:41	27 473 247 141	7 188 927	+0,47	1.Nh4 Nf5 2.Nxf5 exf5 3.Qf3 Be6 4.Bxc6+ Qxc6 5.Qg3 Kf8 6.Bc1 h6 7.Ba3+ Kg8 8.Be7 Kh7 9.a5 b6 10.Bd6 Rhc8 11.Rfb1 Qe8 12.Rb2 Rc6 13.Qf4 bxa5 14.Rxa5 Rb6 15.Rb4 Qc6 16.Qc1 Ra6 17.Rxa6 Qxa6 18.Qb2 Qc8 19.Rb7 a5 20.Qb6 Qd8 21.Qb5 a4
 41/68	1:03:41	27 473 247 141	7 188 927	+0,57	1.Bc1 b6 2.Nh4 Ng6 3.Qg4 Nce7 4.Ba3 a6 5.Bxd7+ Qxd7 6.Rfb1 Rb8 7.Nf3 Qd8 8.Rb2 h6 9.h4 h5 10.Qg5 Nc8 11.Qg3 Qd7 12.Rbb1 Rb7 13.Rc1 Qc7 14.Kh2 Qd7 15.Bd6 Qc6 16.Kg1 a5 17.Rcb1 Rd7 18.Qg5 Rb7 19.Ba3 Qxa4 20.Bf8 Qxc2 21.Bxg7 Rg8 22.Qh6 Kd7 23.Bf6 Qxc3 24.Qxh5
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Dann Corbit
Posts: 12538
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Nh4 is hard to find, but the stats will tell you it is right

Post by Dann Corbit »

Vinvin wrote: ↑Thu Aug 15, 2019 8:36 pm
Is this position valid today ?
Nh4 is no more the strongest move for SF (3 best moves after 1 hour on 6 cores) :
That is a good question.
I found it statistically (Nh4 won far more games than the other moves).
But maybe there is a flaw in the plan that deeper searches find.

I will examine it.
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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