Compare Analysis test - Anand- Topalov game 6

[beram]

Compare Analysis test - The three best Engines from this moment are being tested in compare analysing Topalovs moves in WC 2010 game 6.
All the black Topalov moves from move 9 till 58 is 50 moves
Fritz 12 gui, compare analysis, 10 sec for a move
Centrino Dual Core, Win XP System 32 bit, 2 CPU, Fritzmark 6,29

FireBird 1.2., gives 32 same moves as best move is 64 %
Stockfish 1.7.1. JA, gives 27 same moves is 54 %
Rybka 3, gives 17 same moves is 34 %

Firebird 1.2 proves to be the best in reproducing Topalov’s moves

I ‘ve done this kind of engine-testing before with other GM games of Kasparov and Botwinnik and there also Firebird did better in compare analysis, finding the good GM moves.

Grts bram


(6) Anand,V (2787) - Topalov,V (2805) [E04]
WCh Sofia BUL (6), 01.05.2010
9...0–0 [FireBird 1.2 w32: 9...0–0 10.e3 Nd5 11.exd4 Ba7 12.Be4 Nf6 13.Bg2 Nd5 0.11/18 ; Rybka 3 32-bit: 9...Nbd7 10.Nd3 Be7 11.e3 dxe3 12.Bxe3 0–0 13.Rc1 Nd5 14.Bd4 N7f6 0.23/13 ; Stockfish 1.7.1 JA: 9...Nbd7 10.Nxd7 Qxd7 11.Ne5 Qb5 12.a4 Qb6 13.Qc2 0–0 14.Rd1 Rd8 15.Bf4 Nd5 16.Be4 f5 17.Bg5 Re8 18.Rac1 fxe4 19.Qxc5 Qxb2 20.Rxd4 Qxe2 0.08/17 ] 10.Bg5 h6 [FireBird 1.2 w32: 10...h6 11.Bxf6 Qxf6 12.Nd3 Ba7 13.Rc1 Nc6 14.Qa4 Bd7 15.Nd6 Ne5 16.Qa3 Bc6 17.Nxb7 Bxg2 18.Kxg2 Nxd3 19.exd3 Qf5 20.Qb3 h5 21.Nd6 Qe5 22.Qa3 Qd5+ 23.f3 h4 24.Ne4 a5 25.Rc7 Bb8 26.Rc4 hxg3 27.hxg3 0.05/19 ; Rybka 3 32-bit: 10...Nbd7 11.Nxd7 Qxd7 12.Bxf6 gxf6 13.Rc1 Rd8 14.Qd3 Qb5 15.Rc2 f5 0.02/12 ; Stockfish 1.7.1 JA: 10...Nbd7 11.Nxd7 Qxd7 12.Rc1 Ba7 13.Qc2 Nd5 14.Be4 f5 15.Bxd5 exd5 16.Ne5 Qe8 17.Nd3 Bd7 18.Qc7 Qxe2 19.Qxd7 Qxd3 20.Qxb7 -0.12/17 ] 11.Bxf6 Qxf6 [FireBird 1.2 w32: 11...Qxf6 12.Nd3 Ba7 13.Rc1 Nc6 14.Qa4 Bd7 15.Nd6 Ne5 16.Qa3 Bc6 17.Nxb7 Bxg2 18.Kxg2 Nxd3 19.exd3 Qf5 20.Qb3 h5 21.Nd6 Qe5 22.Qa3 Qd5+ 23.f3 h4 24.Ne4 a5 25.Rc7 Bb8 26.Rc4 hxg3 27.hxg3 0.05/22 ; Rybka 3 32-bit: 11...Qxf6 12.Nd3 Qe7 13.Rc1 Ba7 14.Na5 Bb6 15.Qd2 Nd7 16.Nxb7 Rb8 17.Na5 Bxa5 18.Qxa5 e5 0.18/16 ; Stockfish 1.7.1 JA: 11...Qxf6 12.Nd3 Qe7 13.Qd2 Nc6 14.Rac1 Bd6 15.e3 dxe3 16.Qxe3 Rb8 17.Rfd1 Bc7 18.Nb6 Bd6 19.Nc4 0.00/21 ] 12.Nd3 Ba7 [FireBird 1.2 w32: 12...Ba7 13.Rc1 Nc6 14.Qa4 Bd7 15.Nd6 Ne5 16.Qa3 Bc6 17.Nxb7 Bxg2 18.Kxg2 Nxd3 19.exd3 Qf5 20.Qb3 h5 21.Nd6 Qe5 22.Qa3 Qd5+ 23.f3 h4 24.Ne4 a5 25.Rc7 Bb8 26.Rc4 hxg3 27.hxg3 0.05/21 ; Rybka 3 32-bit: 12...Qe7 13.Rc1 Ba7 14.Na5 Bb6 15.Qd2 Re8 16.Rfd1 Rf8 17.Nc4 Ba7 18.Rf1 Nd7 0.20/14 ; Stockfish 1.7.1 JA: 12...Qe7 13.Qd2 Nc6 14.Rfc1 Bd6 15.Nxd6 Qxd6 16.Qc2 Bd7 17.Qc5 Qb8 18.Bxc6 Bxc6 19.Qxd4 Rd8 20.Qe3 Qd6 21.Ne5 Rac8 22.Nxc6 Rxc6 23.Rxc6 Qxc6 24.Rc1 Qb5 25.b3 Qa5 26.a4 Qf5 27.Kg2 -0.12/19 ] 13.Qa4 Nc6 [FireBird 1.2 w32: 13...Nd7 14.Qb4 e5 15.Rac1 Qe6 16.Rfe1 g5 17.e3 Rb8 18.exd4 Bxd4 19.Ne3 Rd8 20.Bd5 Qg6 21.Red1 Nb6 22.Qe7 Be6 23.Bxe6 Qxe6 24.Qxe6 fxe6 0.01/18 ; Rybka 3 32-bit: 13...Qe7 14.Na5 -0.14/14 ; Stockfish 1.7.1 JA: 13...Nd7 14.Qb4 Rb8 15.Rac1 Qd8 16.Nd6 b5 17.Nxc8 Rxc8 18.Rxc8 Qxc8 19.Rc1 Qd8 20.Qa3 Nb8 21.Bb7 Qb6 22.Qe7 Qd8 23.Qb4 Qb6 24.Qe7 0.00/18 ] 14.Rac1 e5 [FireBird 1.2 w32: 14...Bd7 15.Nd6 Ne5 16.Qa3 Bc6 17.Nxb7 Bxg2 18.Kxg2 Nxd3 19.exd3 Qf5 20.Qb3 h5 21.Nd6 Qe5 22.Qa3 Qd5+ 23.f3 h4 24.Ne4 a5 25.Rc7 Bb8 26.Rc4 hxg3 27.hxg3 0.09/18 ; Rybka 3 32-bit: 14...Bd7 15.Nd6 Qe7 0.03/13 ; Stockfish 1.7.1 JA: 14...e5 15.Bxc6 b5 16.Bxb5 axb5 17.Qxb5 e4 18.Nf4 Ba6 19.Qd5 g5 20.Nh5 Qg6 21.g4 Qe6 22.Qxe6 fxe6 23.Ng3 d3 24.Nxe4 dxe2 25.Rfe1 Rf4 26.Rxe2 Bxf2+ 27.Kg2 Bd4 28.Kg3 Bb7 29.Ned6 Rf3+ 30.Kg2 Rf2+ 0.12/20 ] 15.Bxc6 b5 [FireBird 1.2 w32: 15...b5 16.Bxb5 axb5 17.Qxb5 e4 18.Nf4 Ba6 19.Qd5 g5 20.Nh5 Qg6 21.g4 Qe6 22.Qxe6 fxe6 23.b3 d3 24.e3 Bc5 25.Nd2 Bb4 26.Rfd1 Bb7 27.Rc4 Bxd2 28.Rxd2 Bd5 29.Rc5 Rf7 30.Kg2 Kh7 0.15/19 ; Rybka 3 32-bit: 15...bxc6 16.Ncxe5 c5 17.Qc6 Be6 18.Qxa6 Rfe8 19.Rfe1 Qe7 20.b3 Bd5 21.Qb5 0.18/12 ; Stockfish 1.7.1 JA: 15...b5 16.Bxb5 axb5 17.Qxb5 e4 18.Nf4 Ba6 19.Qd5 g5 20.Nh5 Qg6 21.g4 Qe6 22.Qxe6 fxe6 23.Ng3 d3 24.Nxe4 dxe2 25.Rfe1 Rf4 26.Rxe2 Rxg4+ 27.Kf1 Rf4 28.b3 Bd4 0.04/19 ] 16.Qc2 Qxc6 [FireBird 1.2 w32: 16...Qxc6 17.Ncxe5 Qe4 18.Qc6 Bb7 19.Qxe4 Bxe4 20.Rc2 Rfe8 21.Rfc1 Bb6 22.Kf1 Bd5 23.Nd7 Ba5 24.N7c5 Ra7 25.Nf4 Ba8 26.a3 Bb6 27.Ncd3 Be4 28.f3 Ba8 29.Kg2 Rae7 30.Rc8 g5 31.Rxe8+ Rxe8 -0.05/23 ; Rybka 3 32-bit: 16...Qxc6 17.Ncxe5 Qe4 18.Qc6 Bb7 19.Qxe4 Bxe4 20.f3 -0.02/18 ; Stockfish 1.7.1 JA: 16...Qxc6 17.Ncxe5 Qe4 18.Qc6 Bb7 19.Qxe4 Bxe4 20.Rc2 Rfe8 21.Rfc1 Bb6 22.Nd7 Bd8 23.Kf1 g6 24.N7c5 Bf5 25.Nb3 Bf6 26.Rc6 Kg7 27.R1c5 Bh3+ 28.Ke1 Bg4 -0.20/23 ] 17.Ncxe5 Qe4 [FireBird 1.2 w32: 17...Qe4 18.Qc6 Bb7 19.Qxe4 Bxe4 20.Rc2 Rfe8 21.Rfc1 Bb6 22.Kf1 Bd5 23.Nd7 Ba5 24.N7c5 Ra7 25.Nf4 Ba8 26.a3 Bb6 27.Ncd3 Be4 28.f3 Ba8 29.Kg2 Rae7 30.Rc8 g5 31.Rxe8+ Rxe8 -0.05/22 ; Rybka 3 32-bit: 17...Qe4 18.Qc6 Bb7 19.Qxe4 Bxe4 20.f3 Bd5 21.Nc6 Rfe8 22.Ncb4 Bb7 23.Rc7 Rab8 24.Kf2 Bb6 25.Rd7 Red8 26.Rxd8+ Rxd8 27.Rc1 Re8 28.Nc5 -0.02/16 ; Stockfish 1.7.1 JA: 17...Qe4 18.Qc6 Bb7 19.Qxe4 Bxe4 20.Rc2 Rfe8 21.Rfc1 Bb6 22.Nd7 Bd8 23.Kf1 g6 24.N7c5 Bf5 25.Nb3 Bf6 26.Rc7 Kg7 27.h4 Bh3+ 28.Ke1 Bg4 29.R1c2 Rad8 30.R7c6 -0.32/22 ] 18.Qc6 Bb7 [FireBird 1.2 w32: 18...Bb7 19.Qxe4 Bxe4 20.Rc2 Rfe8 21.Rfc1 Bb6 22.Kf1 Bd5 23.Nd7 Ba5 24.N7c5 Ra7 25.Nf4 Ba8 26.a3 Bb6 27.Ncd3 Be4 28.f3 Ba8 29.Kg2 Rae7 30.Rc8 g5 31.Rxe8+ Rxe8 -0.05/23 ; Rybka 3 32-bit: 18...Bb7 19.Qxe4 Bxe4 20.f3 Bd5 21.Nc6 Rfe8 22.Ncb4 Bb7 23.Rc7 Rab8 24.Kf2 Bb6 25.Rd7 Red8 26.Rxd8+ Rxd8 27.Rc1 Re8 28.Nc5 a5 -0.02/17 ; Stockfish 1.7.1 JA: 18...Bb7 19.Qxe4 Bxe4 20.Rc2 Rfe8 21.Rfc1 Bb6 22.Nd7 Bd8 23.Kf1 g6 24.N7c5 Bf5 25.Nb3 Bf6 26.Rc6 Kg7 27.Rd6 Bh3+ 28.Kg1 Bg4 29.Nxd4 Bxe2 30.Nc5 -0.16/21 ] 19.Qxe4 Bxe4 [FireBird 1.2 w32: 19...Bxe4 20.Nd7 Rfc8 21.N7c5 Bxc5 22.Nxc5 Bd5 23.b3 Bc4 24.bxc4 Rxc5 25.cxb5 Rxc1 26.Rxc1 axb5 27.Rc2 Ra5 28.f4 f5 29.Kf2 Kf7 30.Rc7+ Kg6 31.Rc2 Ra6 32.Rb2 Kf6 33.Rxb5 Rxa2 34.Rb6+ Kf7 35.Rb7+ Kf6 36.Rb6+ -0.02/21 ; Rybka 3 32-bit: 19...Bxe4 20.f3 Bd5 21.Nc6 Rfe8 22.Ncb4 Bc4 23.b3 Bxd3 24.exd3 a5 25.Nd5 Re5 26.Nc7 Rb8 27.Kf2 Rc8 28.f4 0.17/14 ; Stockfish 1.7.1 JA: 19...Bxe4 20.f3 Bd5 21.Nc6 Rfe8 22.Ncb4 Bb7 23.Rc7 Rab8 24.Kf2 Bb6 25.Rd7 Red8 26.Rxd8+ Rxd8 27.Rc1 a5 28.Nc6 Re8 29.Nce5 Bd5 30.Nd7 Bd8 31.b3 Bg5 32.Nf4 a4 33.Nc5 f5 34.Rg1 axb3 35.Nxd5 Be3+ 36.Nxe3 dxe3+ 37.Ke1 bxa2 -0.12/19 ] 20.Rc2 Rfe8 [FireBird 1.2 w32: 20...Rfe8 21.Rfc1 Bb6 22.Kf1 Rad8 23.b3 a5 24.a4 f6 25.f3 Bb7 26.Nc6 Rd5 27.Kf2 g5 28.h4 Kg7 29.f4 bxa4 30.bxa4 Rd7 31.Rb1 -0.05/20 ; Rybka 3 32-bit: 20...Rfc8 21.Rfc1 Re8 22.Nc6 Bb6 23.b3 a5 24.Nce5 f6 25.Nd7 Bd8 26.N7c5 Bf5 -0.08/15 ; Stockfish 1.7.1 JA: 20...Rfe8 21.Rfc1 Bb6 22.Nd7 Bd8 23.Kf1 g6 24.N7c5 Bf5 25.Nb3 Bf6 26.Rc6 Kg7 27.h4 Bh3+ 28.Ke1 Bg4 29.R1c2 Bf5 30.Kf1 Bh3+ 31.Kg1 Bg4 32.f3 Be6 -0.16/20 ] 21.Rfc1 f6 [FireBird 1.2 w32: 21...a5 22.Nd7 Bf5 23.Rc7 Rxe2 24.Rxa7 Rxa7 25.Rc8+ Kh7 26.Nf8+ Kh8 27.Ne6+ Kh7 28.Nf8+ 0.00/17 ; Rybka 3 32-bit: 21...Bb6 22.Nd7 Bd8 23.Kf1 g6 24.N7e5 Kg7 25.f3 Bd5 -0.09/12 ; Stockfish 1.7.1 JA: 21...Bb6 22.Nd7 Bd8 23.Kf1 Bf5 24.N7e5 Bh3+ 25.Kg1 Be6 26.b3 Bd5 27.Nf3 Bb6 28.Kg2 a5 29.Nf4 Be4 30.Nd3 Bf5 31.Kg1 f6 32.a3 Kf7 33.Kg2 a4 34.bxa4 bxa4 -0.20/18 ] 22.Nd7 Bf5 [FireBird 1.2 w32: 22...Re7 23.N7c5 Bxc5 24.Rxc5 Rae8 25.Kf1 Bh7 26.Nf4 d3 27.Rc8 dxe2+ 28.Ke1 Rxc8 29.Rxc8+ Kf7 30.Nd5 Rd7 31.Rc7 Bf5 32.Kxe2 Rxc7 33.Nxc7 Bc8 34.Ke3 g5 35.Ke4 Bb7+ 36.Kf5 Bc8+ 37.Ke4 -0.03/19 ; Rybka 3 32-bit: 22...Re7 23.N7c5 Bxc5 24.Rxc5 Rae8 25.Kf1 Bh7 26.Nf4 d3 27.exd3 g5 28.Nd5 Bxd3+ 29.Kg2 Be4+ 30.Kf1 Bxd5 31.Rxd5 Kf7 32.Rd6 Re6 33.Rxe6 Rxe6 34.f3 Kg6 -0.08/14 ; Stockfish 1.7.1 JA: 22...Re7 23.N7c5 Bxc5 24.Rxc5 Rae8 25.Kf1 Bg6 26.b3 Bf7 27.R1c2 Bg6 28.Rc1 0.00/21 ] 23.N7c5 Bb6 [FireBird 1.2 w32: 23...a5 24.Nb7 Bb8 25.Rc5 g6 26.R1c2 Kg7 27.Kf1 Bh3+ 28.Ke1 Bf5 29.Kf1 0.00/19 ; Rybka 3 32-bit: 23...a5 24.Nb7 Re6 25.Nf4 Re5 26.Rd2 g5 27.Nd3 0.08/13 ; Stockfish 1.7.1 JA: 23...Bb8 24.Rd2 Rc8 25.Rdc2 Re8 0.00/19 ] 24.Nb7 Bd7 [FireBird 1.2 w32: 24...Bd7 25.Nd6 Re6 26.Nc8 Bd8 27.Rc5 Re8 28.R1c2 Bg4 29.f3 Be6 30.Nd6 Re7 31.b3 Rd7 32.Nf5 Kh7 33.Nf4 Bxf5 34.Rxf5 Rc7 35.Rfc5 Rac8 36.b4 0.19/20 ; Rybka 3 32-bit: 24...Bg4 25.f3 Bd7 26.Nd6 Re3 27.Kf2 h5 28.a3 Re6 29.Ne4 Re7 0.16/14 ; Stockfish 1.7.1 JA: 24...Rac8 25.Nd6 Rxc2 26.Rxc2 Bxd3 27.exd3 Re6 28.Rc8+ Kh7 29.Nf5 Kg6 30.Nh4+ Kf7 31.Kf1 h5 32.f4 Re8 33.Rxe8 Kxe8 34.Ke2 Kd7 35.Nf5 g6 36.Nh4 g5 37.fxg5 fxg5 38.Nf5 0.24/22 ] 25.Nf4 Rab8 [FireBird 1.2 w32: 25...Rac8 26.Nd5 Rxc2 27.Rxc2 Ba7 28.Nd6 Re6 29.Nc8 Bb8 30.Ncb6 Be8 31.Na8 Bd7 32.Nab6 0.00/20 ; Rybka 3 32-bit: 25...Rac8 26.Nd6 Rxc2 27.Rxc2 Re5 28.b4 a5 29.a3 axb4 30.axb4 g5 31.Nd3 Re6 32.Nf5 Re8 33.Nd6 Re6 34.Nf5 Re8 35.Nd6 Re6 36.Nf5 Re8 37.Nd6 Re6 38.Nf5 Re8 39.Nd6 Re6 40.Nf5 Re8 0.00/15 ; Stockfish 1.7.1 JA: 25...Rac8 26.Nd6 Rxc2 27.Rxc2 Re5 28.b4 g5 29.Nd3 Re6 30.Nf5 Re8 31.Nd6 Re6 0.00/21 ] 26.Nd6 Re5 [FireBird 1.2 w32: 26...Re5 27.Nd3 Re6 28.Nc8 Ba5 29.b4 Bd8 30.Rc5 Re8 31.R1c2 Bg4 32.f3 Be6 33.Nd6 Re7 34.Kf2 Kh7 35.g4 Bb6 36.Rc6 a5 37.Nc8 Bxc8 38.Rxc8 Rxc8 39.Rxc8 axb4 40.Nxb4 0.30/21 ; Rybka 3 32-bit: 26...Re5 27.Nc8 g5 28.Nd3 Re8 29.Nxb6 0.17/15 ; Stockfish 1.7.1 JA: 26...Re5 27.Kf1 g5 28.Nd3 Re7 29.Nc8 Re8 30.Nxb6 Rxb6 31.Nc5 Bh3+ 32.Ke1 Rc6 33.Rd2 Bg4 34.Nb3 Rxc1+ 35.Nxc1 Rc8 36.Nb3 0.32/22 ] 27.Nc8 Ba5 [FireBird 1.2 w32: 27...Ba5 28.Nd3 Re8 29.Nd6 Re6 30.Nf5 Bb6 31.b4 Ree8 32.Nd6 Red8 33.Nf4 Kh7 34.Kg2 Bg4 35.Ne4 Bf5 36.Kf3 a5 37.bxa5 Bxa5 38.Rc5 Bxe4+ 39.Kxe4 Re8+ 40.Kf3 Bd2 41.R1c2 Bxf4 42.Kxf4 Rb7 43.Rd5 0.15/21 ; Rybka 3 32-bit: 27...g5 28.Nd3 Re8 29.Nxb6 0.17/13 ; Stockfish 1.7.1 JA: 27...Ba5 28.Nd3 Re8 29.Nd6 Re6 30.Nf5 Bb6 31.Nf4 Ree8 32.Nd6 0.00/23 ] 28.Nd3 Re8 [FireBird 1.2 w32: 28...Re8 29.Nd6 Re6 30.Nf5 Bb6 31.b4 Ree8 32.Nd6 Red8 33.Nf4 Kh7 34.Kg2 Bg4 35.Ne4 Bf5 36.Kf3 a5 37.bxa5 Bxa5 38.Rc5 Bxe4+ 39.Kxe4 Re8+ 40.Kf3 Bd2 41.R1c2 Bxf4 42.Kxf4 Rb7 43.Rd5 0.15/22 ; Rybka 3 32-bit: 28...Re6 29.b4 Bd8 30.Nf4 Re5 31.Na7 a5 32.Rd2 Ra8 33.Nc6 0.23/15 ; Stockfish 1.7.1 JA: 28...Re8 29.Nd6 Re6 30.Nf5 Bb6 31.Kf1 Ree8 32.g4 g6 33.Nd6 Re6 34.Nc8 Ba5 35.b4 Bd8 36.Rc5 Re8 37.Nd6 Re7 38.Nc8 Re8 0.00/22 ] 29.Na7 Bb6 [FireBird 1.2 w32: 29...Ra8 30.Nc6 Bxc6 31.Rxc6 Rxe2 32.Rd1 Kf7 33.Rd6 g5 34.Rxd4 Rae8 35.Kg2 Rc2 36.Rd6 Re6 37.Rd7+ Kg6 38.Rc1 Rc4 39.Kf3 Rec6 40.Rxc4 bxc4 41.Nc1 c3 42.bxc3 Bxc3 43.Ne2 -0.11/21 ; Rybka 3 32-bit: 29...Ra8 30.Nc6 Bxc6 31.Rxc6 Rxe2 32.Rd1 Kf7 33.Rd6 g5 34.Kf1 Rc2 35.Kg2 h5 36.Rxd4 Re8 -0.26/14 ; Stockfish 1.7.1 JA: 29...Ra8 30.Nc6 Bxc6 31.Rxc6 Rxe2 32.Rd1 Kf7 33.Rd6 g5 34.Rxd4 Rae8 35.Rd7+ R8e7 36.Rd6 R7e6 -0.40/21 ] 30.Nc6 Rb7 [FireBird 1.2 w32: 30...Bxc6 31.Rxc6 Rxe2 32.Kf1 Rd2 33.Rc8+ Rxc8 34.Rxc8+ Kh7 35.Rc6 Ba5 36.Rxa6 Rd1+ 37.Ke2 Rd2+ 38.Ke1 Bc3 39.bxc3 Rxd3 40.cxd4 Rxd4 41.Ke2 Kg6 42.Ke3 Rc4 43.Kd3 Kf5 44.Rb6 Rc5 45.Kd4 Rc4+ 46.Kd3 0.00/21 ; Rybka 3 32-bit: 30...Bxc6 31.Rxc6 Rxe2 32.Kf1 Rd2 33.Rc8+ Rxc8 34.Rxc8+ Kh7 35.Rc6 Ba5 36.Rxa6 Bc3 37.bxc3 Rxd3 38.cxd4 Rxd4 39.Ke2 Kg6 40.Ke3 Rc4 41.Kd3 Rc7 42.h3 0.00/15 ; Stockfish 1.7.1 JA: 30...Rb7 31.Ncb4 a5 32.Nd5 Be6 33.Nxb6 Rxb6 34.b3 g5 35.f3 Bf5 36.Kf2 Rbe6 37.Rd2 Bxd3 38.exd3 Kf7 39.Rc7+ R6e7 40.Rc6 Re6 41.Rc7+ 0.00/22 ] 31.Ncb4 a5 [FireBird 1.2 w32: 31...a5 32.Nd5 a4 33.N3f4 Bf5 34.Rc6 Bd8 35.R1c5 Re5 36.Rd6 Rd7 37.Rcc6 Re8 38.Rxd7 Bxd7 39.Rd6 Bc8 40.Kg2 Kf7 41.h3 Ba5 42.a3 Bd2 43.Rc6 Bxf4 44.gxf4 Bd7 45.Rc7 0.07/21 ; Rybka 3 32-bit: 31...Bf5 32.a3 Kh7 33.Nd5 Bd8 34.f3 Rd7 35.N5f4 g5 36.g4 0.05/13 ; Stockfish 1.7.1 JA: 31...Bg4 32.Kf1 Bh3+ 33.Kg1 Bg4 0.00/21 ] 32.Nd5 a4 [FireBird 1.2 w32: 32...a4 33.N3f4 Bf5 34.Rd2 Ba7 35.Kg2 Kf7 36.f3 Bb8 37.a3 Rd7 38.Rc5 Rb7 39.g4 Bh7 40.Rc6 Rd7 41.Rb6 Bxf4 42.Nxf4 g5 43.Nh5 0.07/19 ; Rybka 3 32-bit: 32...Bf5 33.a3 Bd8 34.Nc5 Rb8 35.Nd3 Rb7 36.Nc5 Rb8 37.Nd3 Rb7 38.Nc5 Rb8 39.Nd3 Rb7 40.Nc5 Rb8 41.Nd3 Rb7 42.Nc5 Rb8 43.Nd3 Rb7 44.Nc5 Rb8 45.Nd3 Rb7 46.Nc5 Rb8 47.Nd3 Rb7 0.00/14 ; Stockfish 1.7.1 JA: 32...Be6 33.N3f4 Bf5 34.Nd3 a4 35.b4 Be6 36.N3f4 Bf5 37.Nd3 Be6 0.00/20 ] 33.Nxb6 Rxb6 [FireBird 1.2 w32: 33...Rxb6 34.Nc5 Bf5 35.Rd2 Rc6 36.b4 Rc7 37.Kf1 Rce7 38.f3 Re3 39.Kf2 Rc3 40.Ra1 Bg6 41.Nb7 Re6 42.g4 Kh7 43.Rad1 Ra3 44.h4 Be8 45.Nc5 Re7 46.h5 Rae3 0.06/21 ; Rybka 3 32-bit: 33...Rxb6 34.Nc5 Bg4 35.f3 0.08/17 ; Stockfish 1.7.1 JA: 33...Rxb6 34.b3 Bg4 35.Kf1 axb3 36.axb3 Bh3+ 37.Ke1 Bg4 38.Ra2 g5 39.Kf1 Bh3+ 40.Ke1 Bg4 0.00/18 ] 34.Nc5 Bf5 [FireBird 1.2 w32: 34...Bf5 35.Rd2 Rc6 36.b4 Rc7 37.Kf1 Rce7 38.f3 Re3 39.Kf2 Rc3 40.Ra1 Bg6 41.Nb7 Re6 42.g4 Kh7 43.Rad1 Ra3 44.h4 Be8 45.Nc5 Re7 46.h5 Rae3 0.06/22 ; Rybka 3 32-bit: 34...Bg4 35.f3 Bf5 36.Rd2 Rc6 37.b4 Bg6 38.Kf2 Bf7 39.g4 a3 40.Rxd4 Bxa2 41.Ra1 0.08/15 ; Stockfish 1.7.1 JA: 34...Bf5 35.Rd2 Rc6 36.b4 axb3 37.axb3 b4 38.Rxd4 Rxe2 39.Rxb4 Bh3 40.Rbc4 Rd6 41.b4 Rdd2 42.Rh4 Bf5 43.Rf4 Bh3 44.Rh4 0.00/24 ] 35.Rd2 Rc6 [FireBird 1.2 w32: 35...Rc6 36.b4 Rc7 37.Kf1 Rce7 38.f3 Re3 39.Kf2 Rc3 40.Ra1 Bg6 41.Nb7 Re6 42.g4 Kh7 43.Rad1 Ra3 44.h4 Be8 45.Nc5 Re7 46.h5 Rae3 0.06/21 ; Rybka 3 32-bit: 35...Kf7 36.b4 g5 37.Re1 Rd6 38.e4 g4 39.Kg2 h5 40.f3 0.04/13 ; Stockfish 1.7.1 JA: 35...Rc6 36.b4 axb3 37.axb3 b4 38.Rxd4 Rxe2 39.Rxb4 Bh3 40.Rbc4 Rd6 41.b4 Rdd2 42.Rh4 Bf5 43.Rf4 Bh3 44.Rh4 0.00/23 ] 36.b4 axb3 [FireBird 1.2 w32: 36...Rc7 37.Re1 Rce7 38.f3 Bg6 39.Kf2 Rd8 40.Red1 Rde8 41.Re1 0.00/20 ; Rybka 3 32-bit: 36...Rc7 37.f3 Rce7 38.Kf2 Bg6 39.Nd3 Bf7 40.Rc6 Rd8 41.Nc5 Bc4 42.Ne4 0.00/14 ; Stockfish 1.7.1 JA: 36...axb3 37.axb3 b4 38.Rxd4 Rxe2 39.Rxb4 Bh3 40.Rbc4 Rd6 41.b4 Rdd2 42.Rh4 Bf5 43.Rf4 Bh3 44.Rh4 0.00/24 ] 37.axb3 b4 [FireBird 1.2 w32: 37...b4 38.Rxd4 Rxe2 39.Rxb4 Bh3 40.Rbc4 Rd6 41.Re4 Ra2 42.Ra4 Re2 43.Rh4 Rc2 44.Re1 Rxc5 45.Rxh3 Rd4 46.Kg2 Rb5 47.Re3 Rdb4 48.Rh4 Rxb3 49.Rxb3 Rxb3 50.Rc4 Rb7 51.h4 Kf7 52.h5 Ra7 53.Rc6 Rd7 54.Kf3 Rd3+ 55.Ke4 0.12/21 ; Rybka 3 32-bit: 37...b4 38.Rxd4 Rxe2 39.Rxb4 Bh3 40.Rbc4 Rd6 41.Rh4 Rc2 0.19/12 ; Stockfish 1.7.1 JA: 37...b4 38.Rxd4 Rxe2 39.Rxb4 Bh3 40.Rbc4 Rd6 41.b4 Rdd2 42.Rh4 Bf5 43.Rf4 Bh3 44.Rh4 0.00/25 ] 38.Rxd4 Rxe2 [FireBird 1.2 w32: 38...Rxe2 39.Rxb4 Bh3 40.Rbc4 Rd6 41.Re4 Ra2 42.Ra4 Re2 43.Rh4 Rc2 44.Re1 Rxc5 45.Rxh3 Rd4 46.Kg2 Rb5 47.Re3 Rdb4 48.Rh4 Rxb3 49.Rxb3 Rxb3 50.Rc4 Rb7 51.h4 Kf7 52.h5 Ra7 53.Rc6 Rd7 54.Kf3 Rd3+ 55.Ke4 0.12/24 ; Rybka 3 32-bit: 38...Rxe2 39.Rxb4 Bh3 40.Rbc4 Rd6 41.Rh4 Rc2 42.Ra1 Rxc5 0.19/17 ; Stockfish 1.7.1 JA: 38...Rxe2 39.Rxb4 Bh3 40.Rbc4 Rd6 41.b4 Rdd2 42.Rh4 Rc2 43.Ra1 Bf5 44.Rf4 Bh3 45.Rh4 0.00/25 ] 39.Rxb4 Bh3 [FireBird 1.2 w32: 39...Bh3 40.Rbc4 Rd6 41.Re4 Ra2 42.Ra4 Re2 43.Rh4 Rc2 44.Re1 Rxc5 45.Rxh3 Rd4 46.Kg2 Rb5 47.Re3 Rdb4 48.Rh4 Rxb3 49.Rxb3 Rxb3 50.Rc4 Rb7 51.h4 Kf7 52.h5 Ra7 53.Rc6 Rd7 54.Kf3 Rd3+ 55.Ke4 0.12/23 ; Rybka 3 32-bit: 39...Bh3 40.Rbc4 Rd6 41.Rh4 Rc2 42.Ra1 Rxc5 0.19/17 ; Stockfish 1.7.1 JA: 39...Bh3 40.Rbc4 Rd6 41.b4 Rdd2 42.Rf4 Kf7 43.Rh4 Bf5 44.Rf4 Bh3 0.00/24 ] 40.Rbc4 Rd6 [FireBird 1.2 w32: 40...Rd6 41.Re4 Ra2 42.Ra4 Re2 43.Rh4 Rc2 44.Re1 Rxc5 45.Rxh3 Rd4 46.Kg2 Rb5 47.Re3 Rdb4 48.Rh4 Rxb3 49.Rxb3 Rxb3 50.Rc4 Rb7 51.h4 Kf7 52.h5 Ra7 53.Rc6 Rd7 54.Kf3 Rd3+ 55.Ke4 0.12/24 ; Rybka 3 32-bit: 40...Rd6 41.Rh4 Rc2 42.Ra1 Rxc5 43.Rxh3 Rb5 44.g4 Rb4 45.Ra4 Rxa4 46.bxa4 Rd1+ 47.Kg2 Ra1 48.Rc3 Rxa4 49.Kg3 Ra7 50.f4 g6 51.f5 0.16/17 ; Stockfish 1.7.1 JA: 40...Rd6 41.Rh4 Rc2 42.Rc4 Re2 0.00/26 ] 41.Re4 Rb2 [FireBird 1.2 w32: 41...Rb2 42.b4 Rdd2 43.Rh4 Bf5 44.Na4 Ra2 45.Nc3 Rab2 46.Rf4 Bh3 47.Ne4 Rdc2 48.Ra1 Ra2 49.Re1 Re2 50.Rc1 Rec2 51.Rd1 f5 52.Rd8+ Kh7 0.21/21 ; Rybka 3 32-bit: 41...Rc2 42.Ree1 Rb2 43.Rb1 Rdd2 44.Rxb2 Rxb2 45.Rc1 Kf7 46.Rd1 Bg4 0.04/16 ; Stockfish 1.7.1 JA: 41...Rc2 42.Ree1 Rb2 43.Rcd1 Rxd1 44.Rxd1 Kf8 45.Re1 Kf7 46.Rc1 Ke7 47.Rd1 Kf8 0.00/25 ] 42.Ree1 Rdd2 [FireBird 1.2 w32: 42...Rdd2 43.Ne4 Rd3 44.Nc3 Rxb3 45.Ne4 Rb2 46.Rc7 Re2 47.Rcc1 Rxe1+ 48.Rxe1 Rb3 49.f4 Rb2 50.Nf2 Bd7 51.Rc1 Be6 52.Rc5 Rd2 53.Ne4 Re2 54.Nd6 Bg4 55.f5 Bf3 56.Rc8+ Kh7 57.Nf7 g5 58.Rc7 -0.24/24 ; Rybka 3 32-bit: 42...Rdd2 43.Ne4 Rd3 44.Red1 Rxd1+ 45.Rxd1 Rxb3 46.f4 h5 47.Kf2 Bg4 48.Rd2 Kf7 49.Nd6+ Ke6 50.Ne8 g6 51.Nd6 Bf5 52.Nxf5 -0.27/19 ; Stockfish 1.7.1 JA: 42...Rdd2 43.Ne4 Rd3 44.Red1 Rdxb3 45.Nc5 Ra3 46.Nd3 Rb7 47.Nf4 Bg4 48.Rd2 Kf7 49.Ne2 g6 50.Nf4 g5 51.Ne2 Be6 52.Nd4 Rd7 53.Re1 Bf5 54.Kg2 Rd8 -0.60/23 ] 43.Ne4 Rd4 [FireBird 1.2 w32: 43...Rd3 44.Nc3 Rxb3 45.Nd1 Rd2 46.Ne3 Kf7 47.Rc7+ Kg6 48.Rec1 h5 49.R7c6 Rbd3 50.Ra1 Rb2 51.Rcc1 Re2 52.Rd1 Rdd2 53.Rxd2 Rxd2 54.Ra7 Rd3 55.Re7 Rb3 56.Ng2 Rb1+ 57.Ne1 Bc8 58.Kg2 Rb2 -0.24/22 ; Rybka 3 32-bit: 43...Rd3 44.Red1 Rxd1+ 45.Rxd1 Rxb3 46.f4 h5 47.Kf2 Bg4 48.Rd2 Kf7 49.Nd6+ Ke6 50.Ne8 g6 51.Nd6 Bf5 52.Nxf5 -0.27/18 ; Stockfish 1.7.1 JA: 43...Rd3 44.Red1 Rbxb3 45.f4 Rxd1+ 46.Rxd1 Bf5 47.Nd6 Bg4 48.Rd2 Kf8 49.Ne4 Ke7 50.Kf2 Rf3+ 51.Kg2 Re3 52.Nd6 Rb3 53.Kf2 Rf3+ 54.Kg2 Re3 55.Nb5 g6 56.Nd6 -0.56/22 ] 44.Nc5 Rdd2 [FireBird 1.2 w32: 44...Rdd2 45.Ne4 Rd3 46.Nc3 Rxb3 47.Nd1 Rd2 48.Ne3 Kf7 49.Rc7+ Kg6 50.Rec1 h5 51.R7c6 Rbd3 52.Ra1 Rb2 53.Rcc1 Re2 54.Rd1 Rdd2 55.Rxd2 Rxd2 56.Ra7 Rd3 57.Re7 Rc3 58.Ng2 Kh6 59.Ne1 g6 60.f4 Bf5 61.Kf2 0.00/24 ; Rybka 3 32-bit: 44...Rdd2 45.Ne6 0.00/17 ; Stockfish 1.7.1 JA: 44...Rdd2 45.Ne4 0.00/25 ] 45.Ne4 Rd3 [FireBird 1.2 w32: 45...Rd3 46.Nc3 Rxb3 47.Nd1 Rd2 48.Ne3 Kf7 49.Rc7+ Kg6 50.Rec1 h5 51.R7c6 Rbd3 52.Ra1 Rb2 53.Rcc1 Re2 54.Rd1 Rdd2 55.Rxd2 Rxd2 56.Ra7 Rd3 57.Re7 Rc3 58.Ng2 Kh6 59.Ne1 g6 60.f4 Bf5 61.Kf2 -0.24/22 ; Rybka 3 32-bit: 45...Rd3 46.Red1 Rxd1+ 47.Rxd1 Rxb3 48.f4 Kf7 49.Kf2 Bg4 50.Rd2 h5 51.Nd6+ Ke6 -0.26/17 ; Stockfish 1.7.1 JA: 45...Rd3 46.Red1 Rxd1+ 47.Rxd1 Rxb3 48.f4 Kf7 49.Kf2 Bg4 50.Rd2 h5 51.Nd6+ Ke6 52.Nc4 Rf3+ 53.Kg2 Rc3 54.Nd6 Bf3+ 55.Kf2 Bc6 56.Nc8 g5 57.Rd6+ Kf7 58.fxg5 fxg5 59.Nb6 Bh1 60.Rd2 Be4 61.Rd4 Bf5 -0.60/22 ] 46.Rb1 Rdxb3 [FireBird 1.2 w32: 46...Rdxb3 47.Rbc1 Kh7 48.Nc3 Ra3 49.Red1 h5 50.Ne4 Bg4 51.Rd8 Bf3 52.Nd2 Ba8 53.Kf1 Raa2 54.Ke2 Ra7 55.Rc3 g6 56.f3 Kg7 57.Kf2 Re7 -0.29/22 ; Rybka 3 32-bit: 46...Rdxb3 47.Nd2 Rb5 48.f3 Bd7 49.Rxb2 Rxb2 50.Nc4 Ra2 51.g4 Bc6 52.Re3 Kf8 53.Rc3 Ke7 -0.32/18 ; Stockfish 1.7.1 JA: 46...Rdxb3 47.Nd2 Rb4 48.Rxb2 Rxb2 49.Rd1 Kf7 50.f3 Be6 51.Kf1 Bd5 52.Ke2 Ra2 53.Ke3 Ra3+ 54.Ke2 Ke6 55.Rc1 h5 56.Rc7 g6 57.Rc8 Ke5 58.Rd8 Kd4 59.Rd6 Re3+ 60.Kf2 Re6 61.Nb3+ Ke5 -0.76/26 ] 47.Nd2 Rb4 [FireBird 1.2 w32: 47...Rb8 48.Rxb2 Rxb2 49.Rd1 Kf7 50.f3 Ra2 51.Kf2 Bd7 52.Ke3 Ra3+ 53.Kf2 Rd3 54.Ke2 Bb5 55.Ne4 Rb3+ 56.Kf2 Bc6 57.Nd2 Rb2 -0.29/22 ; Rybka 3 32-bit: 47...Rb5 48.f3 Bd7 49.Rxb2 Rxb2 50.Nc4 Ra2 51.g4 Bc6 52.Re3 Kf8 53.Rc3 Ke7 -0.32/17 ; Stockfish 1.7.1 JA: 47...Rb4 48.f3 Kf7 49.Rxb2 Rxb2 50.Rd1 Be6 51.Kf1 Bd5 52.Ke2 Ra2 53.Ke3 Ra3+ 54.Ke2 Ke7 55.Rc1 Kd7 56.Rc5 Kd6 57.Rc8 Ke5 58.Rc7 g6 59.Rg7 Kf5 60.g4+ Kg5 61.Rd7 Bc6 -0.72/26 ] 48.f3 g5 [FireBird 1.2 w32: 48...Kf7 49.Rxb2 Rxb2 50.Rd1 Ra2 51.Kf2 Bd7 52.Ke3 Ra3+ 53.Kf2 Rd3 54.Ke2 Bb5 55.Ne4 Rb3+ 56.Kf2 Bc6 57.Nd2 Rb2 58.Ke3 Rc2 59.Ra1 g5 60.Ra7+ Ke6 -0.29/21 ; Rybka 3 32-bit: 48...Kf7 49.Rxb2 Rxb2 50.Rd1 Ra2 51.Kf2 Bd7 52.Ke1 Ke7 53.Kf2 g5 54.Re1+ Kf7 55.Ke3 Ra3+ 56.Kf2 Bc6 -0.31/17 ; Stockfish 1.7.1 JA: 48...Kf7 49.Rxb2 Rxb2 50.Rd1 Be6 51.Kf1 Bd5 52.Ke2 Ra2 53.Ke3 Ra3+ 54.Ke2 Ke7 55.Rc1 Kd6 56.Rc8 Ra2 57.Ke3 Kd7 58.Rb8 Ke7 59.Kd3 Ke6 60.Rb5 -0.72/22 ] 49.Rxb2 Rxb2 [FireBird 1.2 w32: 49...Rxb2 50.Rd1 Kf7 51.Kf2 Be6 52.Ke3 Ra2 53.Rb1 Ra3+ 54.Kf2 f5 55.Rb6 Ra2 56.Ke3 Ke7 57.h3 Ra3+ 58.Kd4 Kf6 59.g4 Ra8 60.Ke3 Ra4 61.Ke2 Ra2 62.Kd3 Ra3+ 63.Kd4 -0.23/24 ; Rybka 3 32-bit: 49...Rxb2 50.Re8+ Kf7 51.Rd8 Ke7 52.Rd4 Bd7 53.Kf2 Ra2 54.h4 -0.18/19 ; Stockfish 1.7.1 JA: 49...Rxb2 50.Rd1 Be6 51.Kf1 Kf7 52.Ke2 Ra2 53.Rc1 f5 54.Rc7+ Kf6 55.Rh7 Kg6 56.Rb7 Bc4+ 57.Ke1 Bd5 58.Rb6+ Kf7 59.Rxh6 g4 60.fxg4 fxg4 -0.52/18 ] 50.Rd1 Kf7 [FireBird 1.2 w32: 50...Kf7 51.Kf2 Be6 52.Ke3 Ra2 53.Rb1 Ra3+ 54.Kf2 f5 55.Rb6 Ra2 56.Ke3 Ke7 57.h3 Ra3+ 58.Kd4 Kf6 59.g4 Ra8 60.Ke3 Ra4 61.Ke2 Ra2 62.Kd3 Ra3+ 63.Kd4 -0.23/21 ; Rybka 3 32-bit: 50...Kg7 51.Kf2 Be6 52.Ke3 Ra2 53.Rb1 Ra3+ 54.Ke2 f5 55.Rb6 Kf7 56.Rc6 Ra4 57.Rc7+ Kg6 58.Re7 Bf7 59.Rd7 -0.22/16 ; Stockfish 1.7.1 JA: 50...Be6 51.Kf1 Ra2 52.Ke2 f5 53.Kd3 Ra3+ 54.Kd4 Ra4+ 55.Kd3 Ra7 56.Rc1 Kf7 57.Nc4 Kf6 58.Ne3 Ra2 59.Rc2 Rxc2 60.Nxc2 Bd5 61.Nd4 Ke5 62.Ke3 f4+ 63.gxf4+ gxf4+ 64.Kd3 Kd6 65.Nb5+ Kc5 66.Nd4 -0.52/22 ] 51.Kf2 h5 [FireBird 1.2 w32: 51...Be6 52.Ke3 Ra2 53.Rb1 Ra3+ 54.Kf2 f5 55.Rb6 Ra2 56.Ke3 Ke7 57.h3 Ra3+ 58.Kd4 Kf6 59.g4 Ra8 60.Kc3 Rc8+ 61.Kd4 Rd8+ 62.Ke3 f4+ 63.Ke2 -0.23/20 ; Rybka 3 32-bit: 51...Be6 52.Ke3 Ra2 53.Rb1 Bd5 54.Rb6 Ra3+ 55.Ke2 Ke7 56.g4 Rc3 57.Kf2 -0.23/15 ; Stockfish 1.7.1 JA: 51...Bf5 52.Ke3 Ra2 53.Rc1 Ra3+ 54.Ke2 Bd3+ 55.Kf2 Ke6 56.Rc8 f5 57.Rh8 Ke5 58.Rxh6 Kd4 59.Rc6 Ra2 60.Rd6+ Kc3 61.Ke3 f4+ 62.gxf4 gxf4+ 63.Kxf4 Kxd2 64.Ke5 Ra5+ 65.Kd4 -0.44/20 ] 52.Ke3 Rc2 [FireBird 1.2 w32: 52...Bf5 53.h4 Kg6 54.Rc1 Rb6 55.Rc3 Re6+ 56.Kf2 Re5 57.hxg5 fxg5 58.g4 hxg4 59.fxg4 Bxg4 60.Re3 Rd5 61.Nc4 Bf5 62.Kg3 Rd4 63.Ne5+ Kf6 -0.09/18 ; Rybka 3 32-bit: 52...Ra2 53.Rb1 Be6 54.Rb7+ Kg6 55.Rb6 Bd5 56.Rd6 Ra3+ -0.15/16 ; Stockfish 1.7.1 JA: 52...Be6 53.Rb1 Ra2 54.Rb7+ Kg6 55.Rb6 Bd5 56.Rd6 Ra3+ 57.Kf2 Ba8 58.Ne4 Bxe4 59.fxe4 Kf7 60.Ke2 Ke7 61.Rd3 Ra2+ 62.Rd2 Ra4 63.Ke3 Ke6 64.Rb2 Ra6 65.Rc2 Ra3+ 66.Kd4 Ra4+ 67.Rc4 Rxc4+ 68.Kxc4 -0.16/20 ] 53.Ra1 Kg6 [FireBird 1.2 w32: 53...Bf5 54.h4 Rc3+ 55.Kf2 Rd3 56.Ke2 Rd7 57.Ra4 Bc2 58.Rb4 Ra7 59.Kf2 Bh7 60.Rb6 Rc7 61.Ke3 Rc3+ 62.Kf2 gxh4 63.gxh4 Bf5 64.Kg3 Bc2 65.Kf4 Kg6 66.Rd6 Ra3 67.Rb6 Bd3 -0.08/20 ; Rybka 3 32-bit: 53...Bf5 54.Ra3 g4 55.Rb3 Kg6 56.Rb5 Rc3+ 57.Kf4 Bd7 58.Rb3 Rc2 59.Rd3 Bf5 60.Rd6 Ra2 -0.13/16 ; Stockfish 1.7.1 JA: 53...Kg6 54.Ra3 Bc8 55.h4 gxh4 56.gxh4 Rc1 57.Rb3 Bf5 58.Rb4 Rh1 59.Ra4 Rh2 60.Rb4 Bc2 61.Rd4 Rh3 62.Rc4 Bf5 63.Rb4 Rh2 64.Nc4 Be6 65.Nd6 Bd5 -0.08/22 ] 54.Ra6 Bf5 [FireBird 1.2 w32: 54...Bf5 55.h4 gxh4 56.gxh4 Rc1 57.Rd6 Rh1 58.Rd4 Be6 59.Kf2 Rd1 60.Ke3 Re1+ 61.Kf2 Ra1 62.Ne4 Kf7 63.Rb4 Ra6 64.Nc5 Ra2+ 65.Kg3 Bd5 66.Rd4 Bc6 67.Rd6 -0.05/23 ; Rybka 3 32-bit: 54...Bf5 55.g4 hxg4 56.fxg4 Rc3+ 57.Kf2 Bd3 58.Rb6 Bc2 59.Re6 Rc7 60.h3 Rc3 61.Re3 Rc8 62.Ne4 Bxe4 63.Rxe4 -0.08/18 ; Stockfish 1.7.1 JA: 54...Bf5 55.Rb6 Rc3+ 56.Kf2 g4 57.Rd6 Ra3 58.Rb6 Rd3 59.Ke2 Rc3 60.Kf2 Ra3 61.Rd6 Kf7 62.Rd5 Ke6 63.Rb5 Rd3 64.Rb6+ Kf7 65.Ke2 Rc3 66.Kf2 Bc2 67.Rb7+ Kg6 68.Rb6 Rd3 69.Ke2 Rd5 70.Ne4 Rf5 71.fxg4 Re5 -0.20/24 ] 55.Rd6 Rc3+ [FireBird 1.2 w32: 55...Rc3+ 56.Ke2 g4 57.Kf2 Ra3 58.fxg4 hxg4 59.Nc4 Ra2+ 60.Rd2 Ra8 61.Nd6 Be6 62.Ke3 Ra3+ 63.Rd3 Ra1 64.Rd2 Kg5 65.Ne4+ Kf5 66.Nc5 Bg8 67.Rf2+ Kg6 -0.14/22 ; Rybka 3 32-bit: 55...g4 56.fxg4 hxg4 57.Ne4 Bxe4 58.Kxe4 Ra2 59.Kf4 Ra4+ 60.Ke3 Kg5 61.Rd2 Ra3+ 62.Kd4 f5 63.Rc2 Ra4+ 64.Ke5 Re4+ 65.Kd6 Re8 -0.13/17 ; Stockfish 1.7.1 JA: 55...Rc1 56.Rb6 Rc3+ 57.Kf2 g4 58.Rd6 Rc1 59.Rb6 Rh1 60.Kg2 Rd1 61.Nc4 Kg7 62.fxg4 hxg4 63.Kf2 Rh1 64.Ke3 Rxh2 65.Nd6 Kg6 66.Nxf5 Kxf5 67.Rb5+ Ke6 68.Kf4 Rc2 69.Kxg4 Rc3 70.Rb6+ Ke5 -0.24/23 ] 56.Kf2 Rc2 [FireBird 1.2 w32: 56...g4 57.Rb6 Rd3 58.Ke2 Rd5 59.Rb4 Ra5 60.Ke3 Ra6 61.Rb2 Be6 62.fxg4 hxg4 63.Ne4 Ra3+ 64.Kd4 Ra4+ 65.Ke3 Bd5 66.Nc3 Ra3 67.Kd4 Ba8 68.Nd5 Ra4+ 69.Rb4 Rxb4+ 70.Nxb4 -0.19/21 ; Rybka 3 32-bit: 56...g4 57.Rb6 Rd3 58.Ke2 Ra3 59.Kf2 Rc3 60.Rd6 -0.17/16 ; Stockfish 1.7.1 JA: 56...Kf7 57.Rb6 Rd3 58.Ke2 Ra3 59.Kf2 Ra2 60.Ke3 Rc2 61.Ke2 h4 62.Rb7+ Kg6 63.Rb6 Rc8 64.Nb3 Re8+ 65.Kd2 hxg3 66.hxg3 g4 67.fxg4 Rd8+ 68.Ke3 Bxg4 69.Kf4 -0.28/22 ] 57.Ke3 Rc3+ [FireBird 1.2 w32: 57...g4 58.fxg4 hxg4 59.Ne4 Bxe4 60.Kxe4 Rf2 61.Ke3 Ra2 62.Ke4 Ra4+ 63.Ke3 Kg5 64.Rd2 Ra3+ 65.Kd4 Ra1 66.Kd5 f5 67.Ke6 Ra4 68.Rd8 Kg6 69.Ke5 Re4+ 70.Kd5 -0.08/21 ; Rybka 3 32-bit: 57...g4 58.fxg4 hxg4 -0.13/15 ; Stockfish 1.7.1 JA: 57...Rc1 58.Kf2 Kf7 59.Rb6 Rh1 60.Kg2 Rd1 61.Rb2 Ke6 62.Kf2 Rc1 63.Rb6+ Kf7 64.Ke3 Rc3+ 65.Kf2 Rd3 66.Ke2 Ra3 67.Rb7+ Kg6 68.Rb6 Bd3+ 69.Ke3 Bc2+ 70.Kf2 Rc3 71.h4 gxh4 72.gxh4 Kf7 73.Rb7+ Ke6 74.Rb6+ Ke7 75.Rb7+ Ke6 -0.28/21 ] 58.Kf2 Rc2 [FireBird 1.2 w32: 58...g4 59.Rb6 Rc1 60.Ke3 Re1+ 61.Kf2 Rh1 62.Kg2 Rc1 63.Kf2 Rc2 64.Ke3 Kg5 65.Rd6 Ra2 66.Rb6 Kg6 67.f4 Rc2 68.Rd6 h4 69.gxh4 Rc3+ 70.Kd4 Rd3+ 71.Kc5 Rh3 72.h5+ Rxh5 -0.13/19 ; Rybka 3 32-bit: 58...h4 59.Rb6 Rc2 60.Ke3 Rc1 61.Rd6 Re1+ 62.Kf2 Rh1 63.g4 -0.17/14 ; Stockfish 1.7.1 JA: 58...g4 59.Rb6 Rd3 60.Ke2 Ra3 61.Kf2 Rc3 62.Rd6 Kf7 63.Rd5 Ke6 64.Rb5 Rd3 65.Ke2 Rd5 66.Rb6+ Rd6 67.Rxd6+ Kxd6 68.Nc4+ Kc5 69.Ne3 Bd7 70.fxg4 hxg4 71.Kd3 f5 72.Nc4 -0.20/21 ] ½–½

[beram]

At analysis time 30 sec - in stead of 10 sec - a move, Rybka finds 3 more Topalov moves in total 20 moves is 40 %

[gerold]

At analysis time 30 sec - in stead of 10 sec - a move, Rybka finds 3 more Topalov moves in total 20 moves is 40 %

Thanks Bram. I was hoping someone would check the moves
with engines.

Best,
Gerold.

[istolacio]

FireBird 1.2., gives 32 same moves as best move is 64 %

FireBird 1.2 may be is the best engine for analysis. However, analyzing backwards (from the end of the game) you are given an unfair advantage to the engine. Analyzing from the start of the game, the result would not be as good as 64%.

[Sven]

FireBird 1.2., gives 32 same moves as best move is 64 %

FireBird 1.2 may be is the best engine for analysis. However, analyzing backwards (from the end of the game) you are given an unfair advantage to the engine. Analyzing from the start of the game, the result would not be as good as 64%.

Where does he state that he lets the engines analyze backwards? I can't find that statement.

Sven

[Sven]

Compare Analysis test - The three best Engines from this moment are being tested in compare analysing Topalovs moves in WC 2010 game 6.
All the black Topalov moves from move 9 till 58 is 50 moves
Fritz 12 gui, compare analysis, 10 sec for a move
Centrino Dual Core, Win XP System 32 bit, 2 CPU, Fritzmark 6,29

FireBird 1.2., gives 32 same moves as best move is 64 %
Stockfish 1.7.1. JA, gives 27 same moves is 54 %
Rybka 3, gives 17 same moves is 34 %

Firebird 1.2 proves to be the best in reproducing Topalov’s moves

I ‘ve done this kind of engine-testing before with other GM games of Kasparov and Botwinnik and there also Firebird did better in compare analysis, finding the good GM moves.

Thanks for the data! In addition to these very interesting results, would it be a huge effort for you to provide also data like the following, or part of it?

a) How many times did
a1) all three,
a2) only two,
a3) one one, and
a4) none of the engines agree with the GM?

b) In the cases a2, a3, a4: How many times did the engines which did not agree evaluate their best move significantly better (>= MARGIN) than their evaluation of the GM move (which requires an additional analysis of the position after the GM move)?

Sven

[istolacio]

'Compare analysis' in Fritz GUI starts from the end of the game.

[beram]

Compare Analysis test - The three best Engines from this moment are being tested in compare analysing Topalovs moves in WC 2010 game 6.
All the black Topalov moves from move 9 till 58 is 50 moves
Fritz 12 gui, compare analysis, 10 sec for a move
Centrino Dual Core, Win XP System 32 bit, 2 CPU, Fritzmark 6,29

FireBird 1.2., gives 32 same moves as best move is 64 %
Stockfish 1.7.1. JA, gives 27 same moves is 54 %
Rybka 3, gives 17 same moves is 34 %

Firebird 1.2 proves to be the best in reproducing Topalov’s moves

I ‘ve done this kind of engine-testing before with other GM games of Kasparov and Botwinnik and there also Firebird did better in compare analysis, finding the good GM moves.

Thanks for the data! In addition to these very interesting results, would it be a huge effort for you to provide also data like the following, or part of it?

a) How many times did
a1) all three,
a2) only two,
a3) one one, and
a4) none of the engines agree with the GM?

b) In the cases a2, a3, a4: How many times did the engines which did not agree evaluate their best move significantly better (>= MARGIN) than their evaluation of the GM move (which requires an additional analysis of the position after the GM move)?

Sven

Sorry Sven, but if you would like to do that yourself go ahead. I provided the data with the first message.
Only a few remarks I would like to make in addition. It was a very close GM game within the drawing margins.
1) Only after 29 Na7 black could have become slightly better. According to all three engines black should have played Ra8 then, whereafter 30 Nc6 Bxc6 31 Rxc6 black can take pawn on e2, which would lead to a draw to.
2) 25 ...Rab8 would not have been played by all three engines. They prefer ..Rac8 which they all evaluate as equal 0.00

grts Bram

[istolacio]

Thanks for the data! In addition to these very interesting results, would it be a huge effort for you to provide also data like the following, or part of it?

a) How many times did
a1) all three,
a2) only two,
a3) one one, and
a4) none of the engines agree with the GM?

b) In the cases a2, a3, a4: How many times did the engines which did not agree evaluate their best move significantly better (>= MARGIN) than their evaluation of the GM move (which requires an additional analysis of the position after the GM move)?

Sven

There is a new program that makes such statistics. The author is making improvements, but it is usable.

http://www.chess.com/download/view/chessanalyse-21

The current version makes the analysis forwards.

[Sven]

Thanks for the data! In addition to these very interesting results, would it be a huge effort for you to provide also data like the following, or part of it?

a) How many times did
a1) all three,
a2) only two,
a3) one one, and
a4) none of the engines agree with the GM?

b) In the cases a2, a3, a4: How many times did the engines which did not agree evaluate their best move significantly better (>= MARGIN) than their evaluation of the GM move (which requires an additional analysis of the position after the GM move)?

Sorry Sven, but if you would like to do that yourself go ahead. I provided the data with the first message.
Only a few remarks I would like to make in addition. It was a very close GM game within the drawing margins.
1) Only after 29 Na7 black could have become slightly better. According to all three engines black should have played Ra8 then, whereafter 30 Nc6 Bxc6 31 Rxc6 black can take pawn on e2, which would lead to a draw to.
2) 25 ...Rab8 would not have been played by all three engines. They prefer ..Rac8 which they all evaluate as equal 0.00

grts Bram

Code: Select all

(6) Anand,V (2787) - Topalov,V (2805) [E04]
WCh Sofia BUL (6), 01.05.2010
9...0-0
[FireBird 1.2 w32  :  9...0-0    0.11/18 ;
 Rybka 3 32-bit    :  9...Nbd7   0.23/13 ;
 Stockfish 1.7.1 JA:  9...Nbd7   0.08/17
]
10.Bg5 h6
[FireBird 1.2 w32  : 10...h6     0.05/19 ;
 Rybka 3 32-bit    : 10...Nbd7   0.02/12 ;
 Stockfish 1.7.1 JA: 10...Nbd7  -0.12/17
]
11.Bxf6 Qxf6
[FireBird 1.2 w32  : 11...Qxf6   0.05/22 ;
 Rybka 3 32-bit    : 11...Qxf6   0.18/16 ;
 Stockfish 1.7.1 JA: 11...Qxf6   0.00/21
]
12.Nd3 Ba7
[FireBird 1.2 w32  : 12...Ba7    0.05/21 ;
 Rybka 3 32-bit    : 12...Qe7    0.20/14 ;
 Stockfish 1.7.1 JA: 12...Qe7   -0.12/19
]
13.Qa4 Nc6
[FireBird 1.2 w32  : 13...Nd7    0.01/18 ;
 Rybka 3 32-bit    : 13...Qe7   -0.14/14 ;
 Stockfish 1.7.1 JA: 13...Nd7    0.00/18
]
14.Rac1 e5
[FireBird 1.2 w32  : 14...Bd7    0.09/18 ;
 Rybka 3 32-bit    : 14...Bd7    0.03/13 ;
 Stockfish 1.7.1 JA: 14...e5     0.12/20
]
15.Bxc6 b5
[FireBird 1.2 w32  : 15...b5     0.15/19 ;
 Rybka 3 32-bit    : 15...bxc6   0.18/12 ;
 Stockfish 1.7.1 JA: 15...b5     0.04/19
]
16.Qc2 Qxc6
[FireBird 1.2 w32  : 16...Qxc6  -0.05/23 ;
 Rybka 3 32-bit    : 16...Qxc6  -0.02/18 ;
 Stockfish 1.7.1 JA: 16...Qxc6  -0.20/23
]
17.Ncxe5 Qe4
[FireBird 1.2 w32  : 17...Qe4   -0.05/22 ;
 Rybka 3 32-bit    : 17...Qe4   -0.02/16 ;
 Stockfish 1.7.1 JA: 17...Qe4   -0.32/22
]
18.Qc6 Bb7
[FireBird 1.2 w32  : 18...Bb7   -0.05/23 ;
 Rybka 3 32-bit    : 18...Bb7   -0.02/17 ;
 Stockfish 1.7.1 JA: 18...Bb7   -0.16/21
]
19.Qxe4 Bxe4
[FireBird 1.2 w32  : 19...Bxe4  -0.02/21 ;
 Rybka 3 32-bit    : 19...Bxe4   0.17/14 ;
 Stockfish 1.7.1 JA: 19...Bxe4  -0.12/19
]
20.Rc2 Rfe8
[FireBird 1.2 w32  : 20...Rfe8  -0.05/20 ;
 Rybka 3 32-bit    : 20...Rfc8  -0.08/15 ;
 Stockfish 1.7.1 JA: 20...Rfe8  -0.16/20
]
21.Rfc1 f6
[FireBird 1.2 w32  : 21...a5     0.00/17 ;
 Rybka 3 32-bit    : 21...Bb6   -0.09/12 ;
 Stockfish 1.7.1 JA: 21...Bb6   -0.20/18
]
22.Nd7 Bf5
[FireBird 1.2 w32  : 22...Re7   -0.03/19 ;
 Rybka 3 32-bit    : 22...Re7   -0.08/14 ;
 Stockfish 1.7.1 JA: 22...Re7    0.00/21
]
23.N7c5 Bb6
[FireBird 1.2 w32  : 23...a5     0.00/19 ;
 Rybka 3 32-bit    : 23...a5     0.08/13 ;
 Stockfish 1.7.1 JA: 23...Bb8    0.00/19
]
24.Nb7 Bd7
[FireBird 1.2 w32  : 24...Bd7    0.19/20 ;
 Rybka 3 32-bit    : 24...Bg4    0.16/14 ;
 Stockfish 1.7.1 JA: 24...Rac8   0.24/22
]
25.Nf4 Rab8
[FireBird 1.2 w32  : 25...Rac8   0.00/20 ;
 Rybka 3 32-bit    : 25...Rac8   0.00/15 ;
 Stockfish 1.7.1 JA: 25...Rac8   0.00/21
]
26.Nd6 Re5
[FireBird 1.2 w32  : 26...Re5    0.30/21 ;
 Rybka 3 32-bit    : 26...Re5    0.17/15 ;
 Stockfish 1.7.1 JA: 26...Re5    0.32/22
]
27.Nc8 Ba5
[FireBird 1.2 w32  : 27...Ba5    0.15/21 ;
 Rybka 3 32-bit    : 27...g5     0.17/13 ;
 Stockfish 1.7.1 JA: 27...Ba5    0.00/23
]
28.Nd3 Re8
[FireBird 1.2 w32  : 28...Re8    0.15/22 ;
 Rybka 3 32-bit    : 28...Re6    0.23/15 ;
 Stockfish 1.7.1 JA: 28...Re8    0.00/22
]
29.Na7 Bb6
[FireBird 1.2 w32  : 29...Ra8   -0.11/21 ;
 Rybka 3 32-bit    : 29...Ra8   -0.26/14 ;
 Stockfish 1.7.1 JA: 29...Ra8   -0.40/21
]
30.Nc6 Rb7
[FireBird 1.2 w32  : 30...Bxc6   0.00/21 ;
 Rybka 3 32-bit    : 30...Bxc6   0.00/15 ;
 Stockfish 1.7.1 JA: 30...Rb7    0.00/22
]
31.Ncb4 a5
[FireBird 1.2 w32  : 31...a5     0.07/21 ;
 Rybka 3 32-bit    : 31...Bf5    0.05/13 ;
 Stockfish 1.7.1 JA: 31...Bg4    0.00/21
]
32.Nd5 a4
[FireBird 1.2 w32  : 32...a4     0.07/19 ;
 Rybka 3 32-bit    : 32...Bf5    0.00/14 ;
 Stockfish 1.7.1 JA: 32...Be6    0.00/20
]
33.Nxb6 Rxb6
[FireBird 1.2 w32  : 33...Rxb6   0.06/21 ;
 Rybka 3 32-bit    : 33...Rxb6   0.08/17 ;
 Stockfish 1.7.1 JA: 33...Rxb6   0.00/18
]
34.Nc5 Bf5
[FireBird 1.2 w32  : 34...Bf5    0.06/22 ;
 Rybka 3 32-bit    : 34...Bg4    0.08/15 ;
 Stockfish 1.7.1 JA: 34...Bf5    0.00/24
]
35.Rd2 Rc6
[FireBird 1.2 w32  : 35...Rc6    0.06/21 ;
 Rybka 3 32-bit    : 35...Kf7    0.04/13 ;
 Stockfish 1.7.1 JA: 35...Rc6    0.00/23
]
36.b4 axb3
[FireBird 1.2 w32  : 36...Rc7    0.00/20 ;
 Rybka 3 32-bit    : 36...Rc7    0.00/14 ;
 Stockfish 1.7.1 JA: 36...axb3   0.00/24
]
37.axb3 b4
[FireBird 1.2 w32  : 37...b4     0.12/21 ;
 Rybka 3 32-bit    : 37...b4     0.19/12 ;
 Stockfish 1.7.1 JA: 37...b4     0.00/25
]
38.Rxd4 Rxe2
[FireBird 1.2 w32  : 38...Rxe2   0.12/24 ;
 Rybka 3 32-bit    : 38...Rxe2   0.19/17 ;
 Stockfish 1.7.1 JA: 38...Rxe2   0.00/25
]
39.Rxb4 Bh3
[FireBird 1.2 w32  : 39...Bh3    0.12/23 ;
 Rybka 3 32-bit    : 39...Bh3    0.19/17 ;
 Stockfish 1.7.1 JA: 39...Bh3    0.00/24
]
40.Rbc4 Rd6
[FireBird 1.2 w32  : 40...Rd6    0.12/24 ;
 Rybka 3 32-bit    : 40...Rd6    0.16/17 ;
 Stockfish 1.7.1 JA: 40...Rd6    0.00/26
]
41.Re4 Rb2
[FireBird 1.2 w32  : 41...Rb2    0.21/21 ;
 Rybka 3 32-bit    : 41...Rc2    0.04/16 ;
 Stockfish 1.7.1 JA: 41...Rc2    0.00/25
]
42.Ree1 Rdd2
[FireBird 1.2 w32  : 42...Rdd2  -0.24/24 ;
 Rybka 3 32-bit    : 42...Rdd2  -0.27/19 ;
 Stockfish 1.7.1 JA: 42...Rdd2  -0.60/23
]
43.Ne4 Rd4
[FireBird 1.2 w32  : 43...Rd3   -0.24/22 ;
 Rybka 3 32-bit    : 43...Rd3   -0.27/18 ;
 Stockfish 1.7.1 JA: 43...Rd3   -0.56/22
]
44.Nc5 Rdd2
[FireBird 1.2 w32  : 44...Rdd2   0.00/24 ;
 Rybka 3 32-bit    : 44...Rdd2   0.00/17 ;
 Stockfish 1.7.1 JA: 44...Rdd2   0.00/25
]
45.Ne4 Rd3
[FireBird 1.2 w32  : 45...Rd3   -0.24/22 ;
 Rybka 3 32-bit    : 45...Rd3   -0.26/17 ;
 Stockfish 1.7.1 JA: 45...Rd3   -0.60/22
]
46.Rb1 Rdxb3
[FireBird 1.2 w32  : 46...Rdxb3 -0.29/22 ;
 Rybka 3 32-bit    : 46...Rdxb3 -0.32/18 ;
 Stockfish 1.7.1 JA: 46...Rdxb3 -0.76/26
]
47.Nd2 Rb4
[FireBird 1.2 w32  : 47...Rb8   -0.29/22 ;
 Rybka 3 32-bit    : 47...Rb5   -0.32/17 ;
 Stockfish 1.7.1 JA: 47...Rb4   -0.72/26
]
48.f3 g5
[FireBird 1.2 w32  : 48...Kf7   -0.29/21 ;
 Rybka 3 32-bit    : 48...Kf7   -0.31/17 ;
 Stockfish 1.7.1 JA: 48...Kf7   -0.72/22
]
49.Rxb2 Rxb2
[FireBird 1.2 w32  : 49...Rxb2  -0.23/24 ;
 Rybka 3 32-bit    : 49...Rxb2  -0.18/19 ;
 Stockfish 1.7.1 JA: 49...Rxb2  -0.52/18
]
50.Rd1 Kf7
[FireBird 1.2 w32  : 50...Kf7   -0.23/21 ;
 Rybka 3 32-bit    : 50...Kg7   -0.22/16 ;
 Stockfish 1.7.1 JA: 50...Be6   -0.52/22
]
51.Kf2 h5
[FireBird 1.2 w32  : 51...Be6   -0.23/20 ;
 Rybka 3 32-bit    : 51...Be6   -0.23/15 ;
 Stockfish 1.7.1 JA: 51...Bf5   -0.44/20
]
52.Ke3 Rc2
[FireBird 1.2 w32  : 52...Bf5   -0.09/18 ;
 Rybka 3 32-bit    : 52...Ra2   -0.15/16 ;
 Stockfish 1.7.1 JA: 52...Be6   -0.16/20
]
53.Ra1 Kg6
[FireBird 1.2 w32  : 53...Bf5   -0.08/20 ;
 Rybka 3 32-bit    : 53...Bf5   -0.13/16 ;
 Stockfish 1.7.1 JA: 53...Kg6   -0.08/22
]
54.Ra6 Bf5
[FireBird 1.2 w32  : 54...Bf5   -0.05/23 ;
 Rybka 3 32-bit    : 54...Bf5   -0.08/18 ;
 Stockfish 1.7.1 JA: 54...Bf5   -0.20/24
]
55.Rd6 Rc3+
[FireBird 1.2 w32  : 55...Rc3+  -0.14/22 ;
 Rybka 3 32-bit    : 55...g4    -0.13/17 ;
 Stockfish 1.7.1 JA: 55...Rc1   -0.24/23
]
56.Kf2 Rc2
[FireBird 1.2 w32  : 56...g4    -0.19/21 ;
 Rybka 3 32-bit    : 56...g4    -0.17/16 ;
 Stockfish 1.7.1 JA: 56...Kf7   -0.28/22
]
57.Ke3 Rc3+
[FireBird 1.2 w32  : 57...g4    -0.08/21 ;
 Rybka 3 32-bit    : 57...g4    -0.13/15 ;
 Stockfish 1.7.1 JA: 57...Rc1   -0.28/21
]
58.Kf2 Rc2
[FireBird 1.2 w32  : 58...g4    -0.13/19 ;
 Rybka 3 32-bit    : 58...h4    -0.17/14 ;
 Stockfish 1.7.1 JA: 58...g4    -0.20/21
]
½-½

Code: Select all

a1) 3 engines agreed with GM: 17x
a2) 2 engines agreed with GM:  6x
a3) 1 engine  agreed with GM: 14x
a4) 0 engines agreed with GM: 13x

Code: Select all

GM + 3 engines played resp. suggested ...
1 move:  17x (a1)
2 moves: 19x     (a2, a3, a4)
3 moves: 12x         (a3, a4)
4 moves:  2x             (a4)

Sven