do any programs announce mate in 35 on 18.Bh3...

[pilgrimdan]

[Event ""]
[Site ""]
[Date "2017.4.23"]
[Round ""]
[White "CM16"]
[Black "Botv16"]
[TimeControl ""]
[Result "1-0"]

1.Nf3 Nf6 2.c4 b6 3.d4 e6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 d5 8.Qc2 Nc6 9.a3 dxc4 10.bxc4 Bb7 11.e3 a6 12.O-O Na7 13.Nc3 O-O 14.e4 Nd7 15.d5 c6 16.dxe6 fxe6 17.Bf4 g5

[d] r2q1rk1/nb1nb2p/ppp1p3/6p1/2P1PB2/P1N2NP1/2Q2PBP/R4RK1 w - g6 0 18
18.Bh3

...Nc5 19.Rad1 gxf4 20.Rxd8 Raxd8 21.Na4 fxg3 22.fxg3 Nxa4 23.Bxe6+ Kh8 24.Qxa4 Rf6 25.Bf5 Nc8 26.Qc2 h6 27.Kh1 Kg7 28.e5 Rff8 29.Bh7 Kh8 30.Qg6 Rxf3 31.Rxf3 c5 32.Qxh6 Bxf3+ 33.Kg1 Bg5 34.Qxg5 Rd1+ 35.Kf2 Kxh7 36.Qf5+ Kg7 37.Qxf3 Rd2+ 38.Ke3 Rxh2 39.Qb7+ Kg6 40.Qxc8 Ra2 41.e6 Kf6 42.Qd7 Rh2 43.Qf7+ Ke5 44.e7 Rh8 45.e8=Q+ Rxe8 46.Qxe8+ Kd6 47.Ke4 b5 48.Qg6+ Kc7 49.Kd5 bxc4 50.Qc6+ Kb8 51.Qb6+ Kc8 52.Kd6 a5 53.Qc7# 1-0

[pilgrimdan]

[Event ""]
[Site ""]
[Date "2017.4.23"]
[Round ""]
[White "CM16"]
[Black "Botv16"]
[TimeControl ""]
[Result "1-0"]

1.Nf3 Nf6 2.c4 b6 3.d4 e6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 d5 8.Qc2 Nc6 9.a3 dxc4 10.bxc4 Bb7 11.e3 a6 12.O-O Na7 13.Nc3 O-O 14.e4 Nd7 15.d5 c6 16.dxe6 fxe6 17.Bf4 g5

[d] r2q1rk1/nb1nb2p/ppp1p3/6p1/2P1PB2/P1N2NP1/2Q2PBP/R4RK1 w - g6 0 18
18.Bh3

...Nc5 19.Rad1 gxf4 20.Rxd8 Raxd8 21.Na4 fxg3 22.fxg3 Nxa4 23.Bxe6+ Kh8 24.Qxa4 Rf6 25.Bf5 Nc8 26.Qc2 h6 27.Kh1 Kg7 28.e5 Rff8 29.Bh7 Kh8 30.Qg6 Rxf3 31.Rxf3 c5 32.Qxh6 Bxf3+ 33.Kg1 Bg5 34.Qxg5 Rd1+ 35.Kf2 Kxh7 36.Qf5+ Kg7 37.Qxf3 Rd2+ 38.Ke3 Rxh2 39.Qb7+ Kg6 40.Qxc8 Ra2 41.e6 Kf6 42.Qd7 Rh2 43.Qf7+ Ke5 44.e7 Rh8 45.e8=Q+ Rxe8 46.Qxe8+ Kd6 47.Ke4 b5 48.Qg6+ Kc7 49.Kd5 bxc4 50.Qc6+ Kb8 51.Qb6+ Kc8 52.Kd6 a5 53.Qc7# 1-0

1.Nf3 Nf6 2.c4 b6 3.d4 e6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 d5 8.Qc2 Nc6 9.a3 dxc4 10.bxc4 Bb7 11.e3 a6 12.O-O Na7 13.Nc3 O-O 14.e4 Nd7 15.d5 c6 16.dxe6 fxe6 17.Bf4 g5 18.Bh3

[d] r2q1rk1/nb1nb2p/ppp1p3/6p1/2P1PB2/P1N2NPB/2Q2P1P/R4RK1 b - - 0 18
18. ...gxf4!

19.Bxe6+ Kh8 20.Rad1 Bc8 21.Bxd7 fxg3 22.Bxc6 gxh2+ 23.Kh1 Bg4 24.Nxh2 Bxd1 25.Rxd1 Nxc6 26.Rxd8 Raxd8 27.Nd5 Bc5 28.f4 Nd4 29.Qd1 Rd6 30.Ng4 Rg6 31.a4 Rfg8 32.Ndf6 Rd8 33.Qd3 Ne6 34.Qf3 Rg7 35.e5 Nd4 36.Qe4 Ne6 37.a5 Rd1+ 38.Kh2 Rd2+ 39.Kh3 Rd8 40.Kh4 Be7 41.axb6 a5 42.Kh3 a4 43.Nh5 Rg6 44.b7 a3 45.Qb1 Rdg8 46.b8=Q Rxg4 47.Qxg8+ Rxg8 48.Qb7 a2 49.Qa7 Rf8 50.Kg4 Rg8+ 51.Kf5 Nc7 52.Qxa2 Rf8+ 53.Ke4 Ra8 54.Qb2 Ne6 55.f5 Nc5+ 56.Ke3 Bg5+ 57.Kf3 Nd3 58.Qc3 Kg8 59.e6 Ra7 60.Qd4 Rf7 61.f6 Bxf6 62.Nxf6+ Kg7 63.exf7 Kxf7 64.Nd5 Kg8 65.Qf6 Ne5+ 66.Qxe5 h6 67.Qe7 Kh8 68.Nf6 h5 69.Qh7# 1-0

[MikeGL]

[Event ""]
[Site ""]
[Date "2017.4.23"]
[Round ""]
[White "CM16"]
[Black "Botv16"]
[TimeControl ""]
[Result "1-0"]

1.Nf3 Nf6 2.c4 b6 3.d4 e6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 d5 8.Qc2 Nc6 9.a3 dxc4 10.bxc4 Bb7 11.e3 a6 12.O-O Na7 13.Nc3 O-O 14.e4 Nd7 15.d5 c6 16.dxe6 fxe6 17.Bf4 g5

[d] r2q1rk1/nb1nb2p/ppp1p3/6p1/2P1PB2/P1N2NP1/2Q2PBP/R4RK1 w - g6 0 18
18.Bh3

...Nc5 19.Rad1 gxf4 20.Rxd8 Raxd8 21.Na4 fxg3 22.fxg3 Nxa4 23.Bxe6+ Kh8 24.Qxa4 Rf6 25.Bf5 Nc8 26.Qc2 h6 27.Kh1 Kg7 28.e5 Rff8 29.Bh7 Kh8 30.Qg6 Rxf3 31.Rxf3 c5 32.Qxh6 Bxf3+ 33.Kg1 Bg5 34.Qxg5 Rd1+ 35.Kf2 Kxh7 36.Qf5+ Kg7 37.Qxf3 Rd2+ 38.Ke3 Rxh2 39.Qb7+ Kg6 40.Qxc8 Ra2 41.e6 Kf6 42.Qd7 Rh2 43.Qf7+ Ke5 44.e7 Rh8 45.e8=Q+ Rxe8 46.Qxe8+ Kd6 47.Ke4 b5 48.Qg6+ Kc7 49.Kd5 bxc4 50.Qc6+ Kb8 51.Qb6+ Kc8 52.Kd6 a5 53.Qc7# 1-0

is 19...gxf4 best move for black? Maybe black can hold a bit longer with
19...Qe8 instead of the text move above [19...gxf4]

What's the mating line after 19... Qe8

[MikeB]

looks dubious to me , Be3 looks much safer and more sound.

Code: Select all

depth 41 seldepth 70 multipv 1 score cp 284 nodes 20201175625 nps 20955228 hashfull 950 tbhits 12147 time 964016 pv f4e3 c6c5 a1d1 g5g4 f3e5 d7e5 d1d8 a8d8 f1b1 a7c6 b1b6 b7c8 g2f1 c6d4 c2c1 f8f3 c3a4 f3f8 g1h1 d8d7 h2h4 a6a5 c1b2 d4f3 a4c3 f3d4 e3f4 e5f3 f4h6 f8f6 b2c1 f6f7 b6b8 d7d8 c1b2 f3e5 b8a8 e5c6 h1g2 f7f3 h6e3 d8f8 c3a4 e6e5 a4b6 c8e6 a8f8 f3f8 b6d5 d4f3 d5e7 c6e7 e3c5

[pilgrimdan]

[Event ""]
[Site ""]
[Date "2017.4.23"]
[Round ""]
[White "CM16"]
[Black "Botv16"]
[TimeControl ""]
[Result "1-0"]

1.Nf3 Nf6 2.c4 b6 3.d4 e6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 d5 8.Qc2 Nc6 9.a3 dxc4 10.bxc4 Bb7 11.e3 a6 12.O-O Na7 13.Nc3 O-O 14.e4 Nd7 15.d5 c6 16.dxe6 fxe6 17.Bf4 g5

[d] r2q1rk1/nb1nb2p/ppp1p3/6p1/2P1PB2/P1N2NP1/2Q2PBP/R4RK1 w - g6 0 18
18.Bh3

...Nc5 19.Rad1 gxf4 20.Rxd8 Raxd8 21.Na4 fxg3 22.fxg3 Nxa4 23.Bxe6+ Kh8 24.Qxa4 Rf6 25.Bf5 Nc8 26.Qc2 h6 27.Kh1 Kg7 28.e5 Rff8 29.Bh7 Kh8 30.Qg6 Rxf3 31.Rxf3 c5 32.Qxh6 Bxf3+ 33.Kg1 Bg5 34.Qxg5 Rd1+ 35.Kf2 Kxh7 36.Qf5+ Kg7 37.Qxf3 Rd2+ 38.Ke3 Rxh2 39.Qb7+ Kg6 40.Qxc8 Ra2 41.e6 Kf6 42.Qd7 Rh2 43.Qf7+ Ke5 44.e7 Rh8 45.e8=Q+ Rxe8 46.Qxe8+ Kd6 47.Ke4 b5 48.Qg6+ Kc7 49.Kd5 bxc4 50.Qc6+ Kb8 51.Qb6+ Kc8 52.Kd6 a5 53.Qc7# 1-0

is 19...gxf4 best move for black? Maybe black can hold a bit longer with
19...Qe8 instead of the text move above [19...gxf4]

What's the mating line after 19... Qe8

1.Nf3 Nf6 2.c4 b6 3.d4 e6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 d5 8.Qc2 Nc6 9.a3 dxc4 10.bxc4 Bb7 11.e3 a6 12.O-O Na7 13.Nc3 O-O 14.e4 Nd7 15.d5 c6 16.dxe6 fxe6 17.Bf4 g5 18.Bh3 Nc5 19.Rad1

[d] r2q1rk1/nb2b2p/ppp1p3/2n3p1/2P1PB2/P1N2NPB/2Q2P1P/3R1RK1 b - - 0 19
19. …Qe8!

20.Nxg5 e5 21.Be3 Bc8 22.Bf5 Bxg5 23.Bxg5 Qf7 24.Qe2 Be6 25.Bxe6 Nxe6 26.Be3 c5 27.Nd5 Nc6 28.Nxb6 Rad8 29.Qg4+ Kh8 30.Rxd8 Rxd8 31.Qf5 Qxf5 32.exf5 Ned4 33.Kg2 Kg7 34.Na4 Nxf5 35.Bxc5 Rd2 36.Rb1 Ncd4 37.Re1 Kf6 38.Nb6 Ke6 39.Bxd4 Nxd4 40.Na4 Kd6 41.Nc3 Rd3 42.Ne4+ Kc6 43.Ng5 Rxa3 44.Rxe5 Ra4 45.Nxh7 Rxc4 46.Nf6 Rc5 47.Re8 a5 48.h4 Rf5 49.Ne4 Nb5 50.g4 Nc7 51.Rc8 Rf4 52.f3 a4 53.Rd8 a3 54.h5 Rf7 55.Rd6+ Kb5 56.Rd4 Kc6 57.Nc3 Rh7 58.Ra4 Nb5 59.Nxb5 Kxb5 60.Rxa3 Kc4 61.f4 Rb7 62.h6 Rb2+ 63.Kf3 Rb7 64.g5 Rh7 65.Ra2 Kd5 66.Rg2 Kd4 67.g6 Rxh6 68.g7 Rh3+ 69.Kg4 Rc3 70.g8=Q Rc4 71.Qd8+ Kc5 72.Rb2 Ra4 73.Rc2+ Rc4 74.Qc7+ Kb5 75.Qxc4+ Ka5 76.Ra2+ Kb6 77.Rb2+ Ka5 78.Qb5# 1-0

[pilgrimdan]

looks dubious to me , Be3 looks much safer and more sound.

Code: Select all

depth 41 seldepth 70 multipv 1 score cp 284 nodes 20201175625 nps 20955228 hashfull 950 tbhits 12147 time 964016 pv f4e3 c6c5 a1d1 g5g4 f3e5 d7e5 d1d8 a8d8 f1b1 a7c6 b1b6 b7c8 g2f1 c6d4 c2c1 f8f3 c3a4 f3f8 g1h1 d8d7 h2h4 a6a5 c1b2 d4f3 a4c3 f3d4 e3f4 e5f3 f4h6 f8f6 b2c1 f6f7 b6b8 d7d8 c1b2 f3e5 b8a8 e5c6 h1g2 f7f3 h6e3 d8f8 c3a4 e6e5 a4b6 c8e6 a8f8 f3f8 b6d5 d4f3 d5e7 c6e7 e3c5

Be3 wins also...

1.Nf3 Nf6 2.c4 b6 3.d4 e6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 d5 8.Qc2 Nc6 9.a3 dxc4 10.bxc4 Bb7 11.e3 a6 12.O-O Na7 13.Nc3 O-O 14.e4 Nd7 15.d5 c6 16.dxe6 fxe6 17.Bf4 g5
[d] r2q1rk1/nb1nb2p/ppp1p3/6p1/2P1PB2/P1N2NP1/2Q2PBP/R4RK1 w - g6 0 18

18.Be3

…c5 19.Qd2 g4 20.Ng5 Ne5 21.Qxd8 Bxd8 22.Nxe6 Rf7 23.Nd5 Nxc4 24.a4 Nc6 25.Rfd1 Be7 26.Nxb6 Nxb6 27.Rab1 Nb4 28.Nxc5 Nc2 29.Nxb7 Nxa4 30.Bd2 Nd4 31.Bf1 Nf3+ 32.Kg2 Nxd2 33.Rxd2 Nc3 34.Re1 Bg5 35.Rb2 Rc7 36.Nd6 Kf8 37.e5 a5 38.Rc2 Nb5 39.Rxc7 Nxc7 40.Bd3 h6 41.Bf5 a4 42.Bxg4 a3 43.f4 Be7 44.Ra1 a2 45.Kf2 Ra3 46.Ke2 Nd5 47.Be6 Nb4 48.Nb5 Ra5 49.Nd4 Ra3 50.Bb3 Ke8 51.Bc4 Bc5 52.Nb3 Nc2 53.Rxa2 Rxa2 54.Nxc5 Ra3 55.Nb7 Nd4+ 56.Kf2 Rf3+ 57.Kg2 Rc3 58.Nd6+ Kf8 59.h4 h5 60.Bd5 Rc2+ 61.Kf1 Rb2 62.Be4 Ne2 63.Nf5 Rb4 64.Kxe2 Rxe4+ 65.Kd3 Ra4 66.Ne3 Ra3+ 67.Kd4 Ke7 68.f5 Ra4+ 69.Nc4 Rb4 70.Kd5 Rb5+ 71.Ke4 Rb4 72.Kd4 Kd7 73.Kc5 Rb3 74.Nb6+ Ke7 75.Nd5+ Kf8 76.e6 Rxg3 77.f6 Rf3 78.e7+ Kf7 79.Nc7 Re3 80.Kd6 Rd3+ 81.Ke5 Re3+ 82.Kf5 Rxe7 83.fxe7 Kxe7 84.Nd5+ Kf7 85.Nf4 Kg7 86.Nxh5+ Kh6 87.Ng3 Kg7 88.Kg5 Kf8 89.h5 Ke7 90.h6 Kf7 91.Nh5 Kg8 92.Kg6 Kh8 93.Ng3 Kg8 94.Ne4 Kh8 95.Ng5 Kg8 96.h7+ Kf8 97.h8=Q+ Ke7 98.Qd4 Ke8 99.Kf6 Kf8 100.Qd8# 1-0

[peter]

Hi Dann!

I did let SF run a little Backward with 24threads and 30"/move:

[pgn]
[Event "?"]
[Site "?"]
[Date "2017.04.23"]
[Round "?"]
[White "CM16"]
[Black "Botv16"]
[Result "1-0"]
[ECO "E15"]
[EventDate "2017.??.??"]

1.Nf3 Nf6 2.c4 b6 3.d4 e6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 d5 { [%eval 13,28] letzter Buchzug } 8.Qc2 { [%eval 0,27] } ( { pedantFishW_2017-04-22_popcnt: } 8.Ne5 O-O 9.O-O Bb7 10.Nc3 Nbd7 11.Bf4 c5 12.Rc1 cxd4 13.Qxd4 Bc5 14.Qd1 Nxe5 15.Bxe5 Rc8 16.cxd5 Nxd5 17.Nxd5 Bxd5 18.Bxd5 exd5 19.Bb2 Qd7 20.e3 Qf5 21.Qc2 Qe6 22.Qd3 { [%eval 13,28] } ) 8...Nc6 { [%eval 26,27] } ( { pedantFishW_2017-04-22_popcnt: } 8...c5 9.dxc5 { [%eval 0,27] } ) 9.a3 { [%eval 23,29] } 9...dxc4 { [%eval 33,32] } ( { pedantFishW_2017-04-22_popcnt: } 9...O-O 10.e3 Bb7 11.O-O dxc4 12.bxc4 Nb8 13.Nc3 c5 14.Rfd1 cxd4 15.exd4 Nbd7 16.Qb3 Rc8 17.Rac1 h6 18.a4 a6 19.Be3 Ba8 20.h3 Qc7 21.d5 Rfd8 22.Nd4 Nc5 23.Qa2 Bb7 24.a5 bxa5 { [%eval 23,29] } ) 10.bxc4 { [%eval 11,34] } 10...Bb7 { [%eval 21, 30] } ( { pedantFishW_2017-04-22_popcnt: } 10...O-O 11.e3 Bb7 12.Bc3 Nb8 13.Nbd2 c5 14.dxc5 Nbd7 15.cxb6 axb6 16.O-O Rxa3 17.Rxa3 Bxa3 18.e4 Be7 19.e5 Ng4 20.h3 Nh6 21.g4 Qc7 22.Bd4 f5 23.exf6 Bxf6 24.Be3 Nf7 25.g5 Be7 26.g6 Nd6 27.gxh7+ Kh8 28.Ng5 Bxg5 29.Bxg5 Bxg2 30.Kxg2 Ne5 { [%eval 11,34] } ) 11.e3 { [%eval 16,28] } 11...a6 { [%eval 80,26] } ( { pedantFishW_2017-04-22_popcnt: } 11...O-O 12.Bc3 { [%eval 16,28] } ) 12.O-O { [%eval 81,29] } 12...Na7 { [%eval 125,29] } ( { pedantFishW_2017-04-22_popcnt: } 12...O-O 13.Ne5 Qe8 14.Re1 Nd8 15.e4 Nc6 16.Nf3 Nd7 17.Nc3 f6 18.Na4 Nd8 19.d5 e5 20.Be3 Bd6 21.Nh4 Bc8 22.Nf5 Bc5 23.Nxc5 Nxc5 24.Rad1 Nf7 25.f4 exf4 26.Bxc5 bxc5 27.gxf4 { [%eval 81, 29] } ) 13.Nc3 { [%eval 118,30] } 13...O-O { [%eval 118,27] } 14.e4 { [%eval 109,27] } 14...Nd7 { [%eval 108,23] } 15.d5 { [%eval 89,28] } 15...c6 { [%eval 136,29] } ( { pedantFishW_2017- edantFishW_2017-04-22_popcnt: } 15...e5 16.Be3 a5 17.Na4 Bd6 18.Nh4 Nc8 19.Nf5 Ba6 20.Rfc1 Re8 21.Qd2 Bf8 22.c5 bxc5 23.Nxc5 Nxc5 24.Bxc5 Nd6 25.Ne3 a4 26.Ra2 Nb5 27.Bxf8 Rxf8 28.Qa5 Nd4 29.Qxa4 Ne2+ 30.Rxe2 Bxe2 { [%eval 89,28] } ) 16.dxe6 { [%eval 129,29] } 16...fxe6 { [%eval 149,27] } 17.Bf4 { [%eval 114, 26] } 17...g5 { [%eval 215,25] } ( { pedantFishW_2017-04-22_popcnt: } 17...Qe8 18.Rfd1 Nc8 19.e5 c5 20.Qd3 Nb8 21.Rab1 Ra7 22.h4 Qh5 23.Ne4 Qf5 24.Nf6+ gxf6 25.Qxf5 exf5 26.exf6 Bxf6 27.Bxb8 Ra8 28.Bc7 Be4 29.Ng5 Bxg5 30.Bxe4 fxe4 31.hxg5 Rf3 32.Rd8+ Kg7 33.Be5+ Kg6 34.Rd7 Ra7 35.Rxa7 { [%eval 114,26] } ) 18.Bh3 { [%eval 173,30] } 18...Nc5 $6 { [%eval 245,32] } ( 18...gxf4 $2 19.Bxe6+ Kh8 20.Rad1 Bc8 21.Bxd7 fxg3 22.Bxc6 gxh2+ 23.Kh1 Bg4 24.Nxh2 Bxd1 25.Rxd1 Nxc6 26.Rxd8 Raxd8 27.Nd5 Bc5 28.f4 Nd4 29.Qd1 Rd6 30.Ng4 Rg6 31.a4 Rfg8 32.Ndf6 Rd8 33.Qd3 Ne6 34.Qf3 Rg7 35.e5 Nd4 36.Qe4 Ne6 37.a5 Rd1+ 38.Kh2 Rd2+ 39.Kh3 Rd8 40.Kh4 Be7 41.axb6 a5 42.Kh3 a4 43.Nh5 Rg6 44.b7 a3 45.Qb1 Rdg8 46.b8=Q Rxg4 47.Qxg8+ Rxg8 48.Qb7 a2 49.Qa7 Rf8 50.Kg4 Rg8+ 51.Kf5 Nc7 52.Qxa2 Rf8+ 53.Ke4 Ra8 54.Qb2 Ne6 55.f5 Nc5+ 56.Ke3 Bg5+ 57.Kf3 Nd3 58.Qc3 Kg8 59.e6 Ra7 60.Qd4 Rf7 61.f6 Bxf6 62.Nxf6+ Kg7 63.exf7 Kxf7 64.Nd5 Kg8 65.Qf6 Ne5+ 66.Qxe5 h6 67.Qe7 Kh8 68.Nf6 h5 69.Qh7# ) ( { pedantFishW_2017-04-22_popcnt: } 18...Kh8 19.Bxe6 gxf4 20.Rad1 Bc8 21.Bxd7 fxg3 22.hxg3 Rxf3 23.Bxc6 Nxc6 24.Rxd8+ Bxd8 25.Nd5 Rf7 26.f4 Rg7 27.Qb2 Ra7 28.Kg2 Rf7 29.Nxb6 Bg4 30.Nd5 Rb7 31.Qc3 Na5 32.Nb4 Be2 33.Rh1 Bxc4 34.Rd1 Bh4 35.Kf3 Be7 36.f5 Rb8 37.Qd4 Kg8 38.Qe5 Rb5 39.Rd8+ Kf7 40.Qc7 Kf6 { [%eval 173,30] } ) 19.Rad1 { [%eval 239,36] } 19...Qe8 { [%eval 218,35] } 20.Nxg5 { [%eval 215,32] } 20...e5 { [%eval 246,32] } 21.Be3 { [%eval 240,31] } 21...Bc8 { [%eval 320, 32] } ( { pedantFishW_2017-04-22_popcnt: } 21...Bxg5 22.Bxg5 Qh5 23.Bh4 Rae8 24.Na4 Nxa4 25.Qxa4 c5 26.f3 Bc8 27.Bxc8 Nxc8 28.Rf2 Re6 29.Qxa6 Qf7 30.Qa4 Nd6 31.Qc2 Rg6 32.Rd5 Qe6 33.Qc3 Nf7 34.Kg2 Ra8 35.g4 h5 36.h3 Re8 37.Rfd2 Rh6 38.Bg3 Rf8 39.Qe3 { [%eval 240,31] } ) 22.Bf5 { [%eval 327,34] } 22...Bxg5 { [%eval 335,28] } 23.Bxg5 { [%eval 311,30] } 23...Qf7 { [%eval 357,31] } 24.Qe2 { [%eval 361,31] } 24...Be6 { [%eval 364,29] } 25.Bxe6 { [%eval 362,30] } 25...Nxe6 { [%eval 339,26] } 26.Be3 { [%eval 363,29] } 26...c5 { [%eval 408,31] } 27.Nd5 { [%eval 340,32] } 27...Nc6 { [%eval 337,31] } 28.Nxb6 { [%eval 313,31] } 28...Rad8 { [%eval 397,29] } ( { pedantFishW_2017-04-22_popcnt: } 28...Ra7 29.Qg4+ Kh8 30.f4 exf4 31.Bxf4 Qg8 32.Qxg8+ Rxg8 33.Rd6 Nxf4 34.Rxc6 Nd3 35.Rd1 Rd8 36.e5 Rd4 37.e6 Ne5 38.Rxd4 Nf3+ 39.Kf2 Nxd4 40.Rxc5 Nxe6 41.Re5 Rf7+ 42.Ke3 Rf6 43.Nd5 Rg6 44.Ne7 Rf6 45.Nf5 Kg8 46.Nd6 Nc7 47.c5 Rh6 48.Rg5+ Kf8 49.Rf5+ Ke7 50.Rf7+ Kd8 { [%eval 313,31] } ) 29.Qg4+ { [%eval 394,29] } 29...Kh8 { [%eval 383,29] } 30.Rxd8 { [%eval 307,34] } 30...Rxd8 { [%eval 301,31] } 31.Qf5 { [%eval 309,30] } 31...Qxf5 { [%eval 305,33] } 32.exf5 { [%eval 304,33] } 32...Ned4 { [%eval 293,32] } 33.Kg2 { [%eval 283, 31] } 33...Kg7 { [%eval 313,28] } 34.Na4 { [%eval 261,35] } 34...Nxf5 { [%eval 256,31] } 35.Bxc5 { [%eval 254,30] } 35...Rd2 { [%eval 312,33] } ( { pedantFishW_2017-04-22_popcnt: } 35...Nd6 36.Bb6 Rc8 37.Nb2 Kf7 38.f4 exf4 39.Rxf4+ Ke6 40.c5 Ne8 41.Nd3 Nf6 42.Nb4 Ne7 43.Nxa6 Ned5 44.Rh4 Ra8 45.Nc7+ Nxc7 46.Bxc7 Rxa3 47.Bd8 Ra8 48.Bxf6 Kxf6 49.Kf3 Rc8 50.c6 Kg6 51.Rc4 Kf6 52.Ke4 Ke6 { [%eval 254, 30] } ) 36.Rb1 { [%eval 299,32] } 36...Ncd4 { [%eval 301,28] } 37.Re1 { [%eval 284,30] } 37...Kf6 { [%eval 307,31] } 38.Nb6 { [%eval 310,32] } 38...Ke6 { [%eval 284,34] } 39.Bxd4 { [%eval 291,32] } 39...Nxd4 { [%eval 274,33] } 40.Na4 { [%eval 225,30] } 40...Kd6 { [%eval 279, 32] } ( { pedantFishW_2017-04-22_popcnt: } 40...Kf5 41.Nc5 h5 42.Rb1 Nc2 43.Rc1 Nxa3 44.Nxa6 e4 45.c5 Nb5 46.c6 e3 47.Kf3 e2 48.c7 Nxc7 49.Nxc7 Rc2 50.Re1 Rxc7 51.Rxe2 Rc4 52.Ra2 Ke6 53.Ra6+ Kf7 54.h4 Rc5 55.Ke4 Rc4+ 56.Kd3 Rc5 57.f3 Rb5 58.Ra4 Ke6 59.Ke3 Kf6 60.Ra6+ Kg7 61.Ra3 Kf6 62.Ke4 Ke6 { [%eval 225,30] } ) 41.Nc3 { [%eval 244,32] } 41...Rd3 { [%eval 388,30] } ( { pedantFishW_2017-04-22_popcnt: } 41...Ke6 42.Ne4 Rc2 43.Ng5+ Kf5 44.Nf7 Nc6 45.Rb1 Kf6 46.Rb6 Kxf7 47.Rxc6 a5 48.Ra6 e4 49.Kf1 e3 50.fxe3 Rxh2 51.Rxa5 Ke6 52.a4 Ra2 53.Ke1 Kf6 54.g4 Ke6 55.Kd1 Kd6 56.g5 Rg2 57.Rd5+ Kc6 58.e4 Rg4 59.Kc2 Rxe4 60.Kb3 Rg4 61.Kb4 { [%eval 244,32] } ) 42.Ne4+ { [%eval 372,30] } 42...Kc6 { [%eval 464,29] } ( { pedantFishW_2017-04-22_popcnt: } 42...Ke7 43.Nc5 Rxa3 44.Rxe5+ Kf7 45.Rh5 Kg8 46.Rg5+ Kf8 47.Rd5 Nc6 48.Rd7 Ne7 49.Ra7 a5 50.Ne6+ Ke8 51.Ra8+ Kd7 52.Nf8+ Kc7 53.Ra7+ Kd8 54.Nxh7 Nc6 55.Ra8+ Kc7 56.h4 Kb7 57.Re8 a4 58.Ng5 Rd3 59.h5 Rd6 60.Re3 Rh6 61.g4 Kb6 62.Ne6 { [%eval 372,30] } ) 43.Ng5 { [%eval 465,30] } 43...Rxa3 { [%eval 470,30] } 44.Rxe5 { [%eval 458,30] } 44...Ra4 { [%eval 619,31] } ( { pedantFishW_2017-04-22_popcnt: } 44...h6 45.Ne4 Ra4 46.Rh5 Rxc4 47.Rxh6+ Kd5 48.Nf6+ Kd6 49.Ng4+ Ne6 50.f4 Rc5 51.Kf3 a5 52.Ke4 Ke7 53.Ne5 Rc2 54.h4 a4 55.Rh7+ Kd6 56.Rd7+ Kc5 57.Nd3+ Kb5 58.Rb7+ Kc4 59.Nb2+ Kc5 60.Nxa4+ Kd6 61.Rb4 Rh2 62.Rb6+ Ke7 63.f5 Nd8 64.Nc3 Nf7 65.Nd5+ Kd7 66.Rb7+ Ke8 67.Ra7 Re2+ 68.Kf3 Rd2 69.Ra8+ Kd7 70.Ne3 Ne5+ 71.Ke4 { [%eval 458,30] } ) 45.Nxh7 { [%eval 610,30] } 45...Rxc4 { [%eval 605,30] } 46.Nf6 { [%eval 588,30] } 46...Rc5 { [%eval 673,31] } 47.Re8 { [%eval 486,28] } ( { pedantFishW_2017-04-22_popcnt: } 47.Re4 Nf5 48.Re6+ Kb5 49.Ne4 Rc4 50.g4 Nd4 51.Re8 Rc7 52.h4 Rh7 53.h5 Rh6 54.Kg3 a5 55.Kf4 a4 56.Kg5 Rb6 57.h6 Ne6+ 58.Rxe6 Rxe6 59.h7 Rxe4 60.h8=Q Rb4 61.Qe8+ Kc4 62.Qf7+ Kc3 63.Qa2 Rb5+ 64.Kf4 Kb4 65.Qb2+ Ka5 66.Qc3+ Ka6 67.g5 Rb6 68.Kg4 a3 { [%eval 673,31] } ) 47...a5 { [%eval 566,31] } 48.h4 { [%eval 575,34] } 48...Rf5 { [%eval 527,30] } 49.Ne4 { [%eval 524,28] } 49...Nb5 { [%eval 693,31] } ( { pedantFishW_2017-04-22_popcnt: } 49...Kc7 50.Kh3 { [%eval 524,28] } ) 50.g4 { [%eval 649,32] } 50...Nc7 { [%eval 609,31] } 51.Rc8 { [%eval 579,30] } 51...Rf4 { [%eval 910,34] } ( { pedantFishW_2017-04-22_popcnt: } 51...Re5 52.Nc3 Kd7 53.Rg8 Ke6 54.h5 Kf7 55.Rb8 Ne6 56.Rb7+ Kg8 57.Kg3 Nc5 58.Ra7 a4 59.Kf3 Rg5 60.Ra5 Kh7 61.Nxa4 Ne6 62.Rxg5 Nxg5+ 63.Kf4 Ne6+ 64.Kf5 Nd4+ 65.Ke4 Ne6 66.f4 Kh6 67.Nc3 Nc5+ 68.Ke3 Ne6 69.Ne4 Nc7 70.f5 { [%eval 579,30] } ) 52.f3 { [%eval 889,33] } 52...a4 { [%eval 896,34] } 53.Rd8 { [%eval 893,34] } 53...a3 { [%eval 895,31] } 54.h5 { [%eval 860,36] } 54...Rf7 { [%eval 885,30] } 55.Rd6+ { [%eval 878,33] } 55...Kb5 { [%eval 862,30] } 56.Rd4 { [%eval 860,31] } 56...Kc6 { [%eval 831,30] } 57.Nc3 { [%eval 817,30] } 57...Rh7 { [%eval 861,29] } 58.Ra4 { [%eval 837,30] } 58...Nb5 { [%eval 32720,44] } ( { pedantFishW_2017-04-22_popcnt: } 58...Rh8 59.Rxa3 Ne6 60.Ra6+ Kd7 61.Ne4 Nc7 62.Ra5 Kc6 63.Kg3 Kb6 64.Ra3 Ne6 65.Kh4 Ng7 66.Ra4 Rh6 67.Ra8 Rc6 68.f4 Ne6 69.f5 Nc7 70.Rb8+ Ka7 71.Rb4 Nd5 72.Rd4 Ne3 73.f6 Rc7 74.h6 Rh7 75.Ra4+ Kb6 76.g5 Nf5+ 77.Kg4 Nxh6+ 78.gxh6 Rxh6 { [%eval 837,30] } ) 59.Nxb5 { [%eval 32712,32] } 59...Kxb5 { [%eval 32726,61] } 60.Rxa3 { [%eval 32728,56] } 60...Kc4 { [%eval 32732,57] } 61.f4 { [%eval 32734,56] } 61...Rb7 { [%eval 32736,46] } 62.h6 { [%eval 32736,55] } 62...Rb2+ { [%eval 32736,48] } 63.Kf3 { [%eval 32732,67] } 63...Rh2 { [%eval 32732,64] } ( 63...Rb7 $5 64.g5 Rh7 65.Ra2 Kd5 66.Rg2 Kd4 67.g6 Rxh6 68.g7 Rh3+ 69.Kg4 Rc3 70.g8=Q Rc4 71.Qd8+ Kc5 72.Rb2 Ra4 73.Rc2+ Rc4 74.Qc7+ Kb5 75.Qxc4+ Ka5 76.Ra2+ Kb6 77.Rb2+ Ka5 78.Qb5# ) 1-0
[/pgn]

Commentaries of ?! and !? I added manually.
At the new end mate- scores are to be seen only by quoting the .pgn, and c+p into GUI, at 63th #18, back to 58th #24.

Guess after 17th move it's too early to announce mate but at least SF kept 18.Bh3 without comment, therefore I did so too.

[pilgrimdan]

Hi Dann!

I did let SF run a little Backward with 24threads and 30"/move:

[pgn]
[Event "?"]
[Site "?"]
[Date "2017.04.23"]
[Round "?"]
[White "CM16"]
[Black "Botv16"]
[Result "1-0"]
[ECO "E15"]
[EventDate "2017.??.??"]

1.Nf3 Nf6 2.c4 b6 3.d4 e6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 d5 { [%eval 13,28] letzter Buchzug } 8.Qc2 { [%eval 0,27] } ( { pedantFishW_2017-04-22_popcnt: } 8.Ne5 O-O 9.O-O Bb7 10.Nc3 Nbd7 11.Bf4 c5 12.Rc1 cxd4 13.Qxd4 Bc5 14.Qd1 Nxe5 15.Bxe5 Rc8 16.cxd5 Nxd5 17.Nxd5 Bxd5 18.Bxd5 exd5 19.Bb2 Qd7 20.e3 Qf5 21.Qc2 Qe6 22.Qd3 { [%eval 13,28] } ) 8...Nc6 { [%eval 26,27] } ( { pedantFishW_2017-04-22_popcnt: } 8...c5 9.dxc5 { [%eval 0,27] } ) 9.a3 { [%eval 23,29] } 9...dxc4 { [%eval 33,32] } ( { pedantFishW_2017-04-22_popcnt: } 9...O-O 10.e3 Bb7 11.O-O dxc4 12.bxc4 Nb8 13.Nc3 c5 14.Rfd1 cxd4 15.exd4 Nbd7 16.Qb3 Rc8 17.Rac1 h6 18.a4 a6 19.Be3 Ba8 20.h3 Qc7 21.d5 Rfd8 22.Nd4 Nc5 23.Qa2 Bb7 24.a5 bxa5 { [%eval 23,29] } ) 10.bxc4 { [%eval 11,34] } 10...Bb7 { [%eval 21, 30] } ( { pedantFishW_2017-04-22_popcnt: } 10...O-O 11.e3 Bb7 12.Bc3 Nb8 13.Nbd2 c5 14.dxc5 Nbd7 15.cxb6 axb6 16.O-O Rxa3 17.Rxa3 Bxa3 18.e4 Be7 19.e5 Ng4 20.h3 Nh6 21.g4 Qc7 22.Bd4 f5 23.exf6 Bxf6 24.Be3 Nf7 25.g5 Be7 26.g6 Nd6 27.gxh7+ Kh8 28.Ng5 Bxg5 29.Bxg5 Bxg2 30.Kxg2 Ne5 { [%eval 11,34] } ) 11.e3 { [%eval 16,28] } 11...a6 { [%eval 80,26] } ( { pedantFishW_2017-04-22_popcnt: } 11...O-O 12.Bc3 { [%eval 16,28] } ) 12.O-O { [%eval 81,29] } 12...Na7 { [%eval 125,29] } ( { pedantFishW_2017-04-22_popcnt: } 12...O-O 13.Ne5 Qe8 14.Re1 Nd8 15.e4 Nc6 16.Nf3 Nd7 17.Nc3 f6 18.Na4 Nd8 19.d5 e5 20.Be3 Bd6 21.Nh4 Bc8 22.Nf5 Bc5 23.Nxc5 Nxc5 24.Rad1 Nf7 25.f4 exf4 26.Bxc5 bxc5 27.gxf4 { [%eval 81, 29] } ) 13.Nc3 { [%eval 118,30] } 13...O-O { [%eval 118,27] } 14.e4 { [%eval 109,27] } 14...Nd7 { [%eval 108,23] } 15.d5 { [%eval 89,28] } 15...c6 { [%eval 136,29] } ( { pedantFishW_2017- edantFishW_2017-04-22_popcnt: } 15...e5 16.Be3 a5 17.Na4 Bd6 18.Nh4 Nc8 19.Nf5 Ba6 20.Rfc1 Re8 21.Qd2 Bf8 22.c5 bxc5 23.Nxc5 Nxc5 24.Bxc5 Nd6 25.Ne3 a4 26.Ra2 Nb5 27.Bxf8 Rxf8 28.Qa5 Nd4 29.Qxa4 Ne2+ 30.Rxe2 Bxe2 { [%eval 89,28] } ) 16.dxe6 { [%eval 129,29] } 16...fxe6 { [%eval 149,27] } 17.Bf4 { [%eval 114, 26] } 17...g5 { [%eval 215,25] } ( { pedantFishW_2017-04-22_popcnt: } 17...Qe8 18.Rfd1 Nc8 19.e5 c5 20.Qd3 Nb8 21.Rab1 Ra7 22.h4 Qh5 23.Ne4 Qf5 24.Nf6+ gxf6 25.Qxf5 exf5 26.exf6 Bxf6 27.Bxb8 Ra8 28.Bc7 Be4 29.Ng5 Bxg5 30.Bxe4 fxe4 31.hxg5 Rf3 32.Rd8+ Kg7 33.Be5+ Kg6 34.Rd7 Ra7 35.Rxa7 { [%eval 114,26] } ) 18.Bh3 { [%eval 173,30] } 18...Nc5 $6 { [%eval 245,32] } ( 18...gxf4 $2 19.Bxe6+ Kh8 20.Rad1 Bc8 21.Bxd7 fxg3 22.Bxc6 gxh2+ 23.Kh1 Bg4 24.Nxh2 Bxd1 25.Rxd1 Nxc6 26.Rxd8 Raxd8 27.Nd5 Bc5 28.f4 Nd4 29.Qd1 Rd6 30.Ng4 Rg6 31.a4 Rfg8 32.Ndf6 Rd8 33.Qd3 Ne6 34.Qf3 Rg7 35.e5 Nd4 36.Qe4 Ne6 37.a5 Rd1+ 38.Kh2 Rd2+ 39.Kh3 Rd8 40.Kh4 Be7 41.axb6 a5 42.Kh3 a4 43.Nh5 Rg6 44.b7 a3 45.Qb1 Rdg8 46.b8=Q Rxg4 47.Qxg8+ Rxg8 48.Qb7 a2 49.Qa7 Rf8 50.Kg4 Rg8+ 51.Kf5 Nc7 52.Qxa2 Rf8+ 53.Ke4 Ra8 54.Qb2 Ne6 55.f5 Nc5+ 56.Ke3 Bg5+ 57.Kf3 Nd3 58.Qc3 Kg8 59.e6 Ra7 60.Qd4 Rf7 61.f6 Bxf6 62.Nxf6+ Kg7 63.exf7 Kxf7 64.Nd5 Kg8 65.Qf6 Ne5+ 66.Qxe5 h6 67.Qe7 Kh8 68.Nf6 h5 69.Qh7# ) ( { pedantFishW_2017-04-22_popcnt: } 18...Kh8 19.Bxe6 gxf4 20.Rad1 Bc8 21.Bxd7 fxg3 22.hxg3 Rxf3 23.Bxc6 Nxc6 24.Rxd8+ Bxd8 25.Nd5 Rf7 26.f4 Rg7 27.Qb2 Ra7 28.Kg2 Rf7 29.Nxb6 Bg4 30.Nd5 Rb7 31.Qc3 Na5 32.Nb4 Be2 33.Rh1 Bxc4 34.Rd1 Bh4 35.Kf3 Be7 36.f5 Rb8 37.Qd4 Kg8 38.Qe5 Rb5 39.Rd8+ Kf7 40.Qc7 Kf6 { [%eval 173,30] } ) 19.Rad1 { [%eval 239,36] } 19...Qe8 { [%eval 218,35] } 20.Nxg5 { [%eval 215,32] } 20...e5 { [%eval 246,32] } 21.Be3 { [%eval 240,31] } 21...Bc8 { [%eval 320, 32] } ( { pedantFishW_2017-04-22_popcnt: } 21...Bxg5 22.Bxg5 Qh5 23.Bh4 Rae8 24.Na4 Nxa4 25.Qxa4 c5 26.f3 Bc8 27.Bxc8 Nxc8 28.Rf2 Re6 29.Qxa6 Qf7 30.Qa4 Nd6 31.Qc2 Rg6 32.Rd5 Qe6 33.Qc3 Nf7 34.Kg2 Ra8 35.g4 h5 36.h3 Re8 37.Rfd2 Rh6 38.Bg3 Rf8 39.Qe3 { [%eval 240,31] } ) 22.Bf5 { [%eval 327,34] } 22...Bxg5 { [%eval 335,28] } 23.Bxg5 { [%eval 311,30] } 23...Qf7 { [%eval 357,31] } 24.Qe2 { [%eval 361,31] } 24...Be6 { [%eval 364,29] } 25.Bxe6 { [%eval 362,30] } 25...Nxe6 { [%eval 339,26] } 26.Be3 { [%eval 363,29] } 26...c5 { [%eval 408,31] } 27.Nd5 { [%eval 340,32] } 27...Nc6 { [%eval 337,31] } 28.Nxb6 { [%eval 313,31] } 28...Rad8 { [%eval 397,29] } ( { pedantFishW_2017-04-22_popcnt: } 28...Ra7 29.Qg4+ Kh8 30.f4 exf4 31.Bxf4 Qg8 32.Qxg8+ Rxg8 33.Rd6 Nxf4 34.Rxc6 Nd3 35.Rd1 Rd8 36.e5 Rd4 37.e6 Ne5 38.Rxd4 Nf3+ 39.Kf2 Nxd4 40.Rxc5 Nxe6 41.Re5 Rf7+ 42.Ke3 Rf6 43.Nd5 Rg6 44.Ne7 Rf6 45.Nf5 Kg8 46.Nd6 Nc7 47.c5 Rh6 48.Rg5+ Kf8 49.Rf5+ Ke7 50.Rf7+ Kd8 { [%eval 313,31] } ) 29.Qg4+ { [%eval 394,29] } 29...Kh8 { [%eval 383,29] } 30.Rxd8 { [%eval 307,34] } 30...Rxd8 { [%eval 301,31] } 31.Qf5 { [%eval 309,30] } 31...Qxf5 { [%eval 305,33] } 32.exf5 { [%eval 304,33] } 32...Ned4 { [%eval 293,32] } 33.Kg2 { [%eval 283, 31] } 33...Kg7 { [%eval 313,28] } 34.Na4 { [%eval 261,35] } 34...Nxf5 { [%eval 256,31] } 35.Bxc5 { [%eval 254,30] } 35...Rd2 { [%eval 312,33] } ( { pedantFishW_2017-04-22_popcnt: } 35...Nd6 36.Bb6 Rc8 37.Nb2 Kf7 38.f4 exf4 39.Rxf4+ Ke6 40.c5 Ne8 41.Nd3 Nf6 42.Nb4 Ne7 43.Nxa6 Ned5 44.Rh4 Ra8 45.Nc7+ Nxc7 46.Bxc7 Rxa3 47.Bd8 Ra8 48.Bxf6 Kxf6 49.Kf3 Rc8 50.c6 Kg6 51.Rc4 Kf6 52.Ke4 Ke6 { [%eval 254, 30] } ) 36.Rb1 { [%eval 299,32] } 36...Ncd4 { [%eval 301,28] } 37.Re1 { [%eval 284,30] } 37...Kf6 { [%eval 307,31] } 38.Nb6 { [%eval 310,32] } 38...Ke6 { [%eval 284,34] } 39.Bxd4 { [%eval 291,32] } 39...Nxd4 { [%eval 274,33] } 40.Na4 { [%eval 225,30] } 40...Kd6 { [%eval 279, 32] } ( { pedantFishW_2017-04-22_popcnt: } 40...Kf5 41.Nc5 h5 42.Rb1 Nc2 43.Rc1 Nxa3 44.Nxa6 e4 45.c5 Nb5 46.c6 e3 47.Kf3 e2 48.c7 Nxc7 49.Nxc7 Rc2 50.Re1 Rxc7 51.Rxe2 Rc4 52.Ra2 Ke6 53.Ra6+ Kf7 54.h4 Rc5 55.Ke4 Rc4+ 56.Kd3 Rc5 57.f3 Rb5 58.Ra4 Ke6 59.Ke3 Kf6 60.Ra6+ Kg7 61.Ra3 Kf6 62.Ke4 Ke6 { [%eval 225,30] } ) 41.Nc3 { [%eval 244,32] } 41...Rd3 { [%eval 388,30] } ( { pedantFishW_2017-04-22_popcnt: } 41...Ke6 42.Ne4 Rc2 43.Ng5+ Kf5 44.Nf7 Nc6 45.Rb1 Kf6 46.Rb6 Kxf7 47.Rxc6 a5 48.Ra6 e4 49.Kf1 e3 50.fxe3 Rxh2 51.Rxa5 Ke6 52.a4 Ra2 53.Ke1 Kf6 54.g4 Ke6 55.Kd1 Kd6 56.g5 Rg2 57.Rd5+ Kc6 58.e4 Rg4 59.Kc2 Rxe4 60.Kb3 Rg4 61.Kb4 { [%eval 244,32] } ) 42.Ne4+ { [%eval 372,30] } 42...Kc6 { [%eval 464,29] } ( { pedantFishW_2017-04-22_popcnt: } 42...Ke7 43.Nc5 Rxa3 44.Rxe5+ Kf7 45.Rh5 Kg8 46.Rg5+ Kf8 47.Rd5 Nc6 48.Rd7 Ne7 49.Ra7 a5 50.Ne6+ Ke8 51.Ra8+ Kd7 52.Nf8+ Kc7 53.Ra7+ Kd8 54.Nxh7 Nc6 55.Ra8+ Kc7 56.h4 Kb7 57.Re8 a4 58.Ng5 Rd3 59.h5 Rd6 60.Re3 Rh6 61.g4 Kb6 62.Ne6 { [%eval 372,30] } ) 43.Ng5 { [%eval 465,30] } 43...Rxa3 { [%eval 470,30] } 44.Rxe5 { [%eval 458,30] } 44...Ra4 { [%eval 619,31] } ( { pedantFishW_2017-04-22_popcnt: } 44...h6 45.Ne4 Ra4 46.Rh5 Rxc4 47.Rxh6+ Kd5 48.Nf6+ Kd6 49.Ng4+ Ne6 50.f4 Rc5 51.Kf3 a5 52.Ke4 Ke7 53.Ne5 Rc2 54.h4 a4 55.Rh7+ Kd6 56.Rd7+ Kc5 57.Nd3+ Kb5 58.Rb7+ Kc4 59.Nb2+ Kc5 60.Nxa4+ Kd6 61.Rb4 Rh2 62.Rb6+ Ke7 63.f5 Nd8 64.Nc3 Nf7 65.Nd5+ Kd7 66.Rb7+ Ke8 67.Ra7 Re2+ 68.Kf3 Rd2 69.Ra8+ Kd7 70.Ne3 Ne5+ 71.Ke4 { [%eval 458,30] } ) 45.Nxh7 { [%eval 610,30] } 45...Rxc4 { [%eval 605,30] } 46.Nf6 { [%eval 588,30] } 46...Rc5 { [%eval 673,31] } 47.Re8 { [%eval 486,28] } ( { pedantFishW_2017-04-22_popcnt: } 47.Re4 Nf5 48.Re6+ Kb5 49.Ne4 Rc4 50.g4 Nd4 51.Re8 Rc7 52.h4 Rh7 53.h5 Rh6 54.Kg3 a5 55.Kf4 a4 56.Kg5 Rb6 57.h6 Ne6+ 58.Rxe6 Rxe6 59.h7 Rxe4 60.h8=Q Rb4 61.Qe8+ Kc4 62.Qf7+ Kc3 63.Qa2 Rb5+ 64.Kf4 Kb4 65.Qb2+ Ka5 66.Qc3+ Ka6 67.g5 Rb6 68.Kg4 a3 { [%eval 673,31] } ) 47...a5 { [%eval 566,31] } 48.h4 { [%eval 575,34] } 48...Rf5 { [%eval 527,30] } 49.Ne4 { [%eval 524,28] } 49...Nb5 { [%eval 693,31] } ( { pedantFishW_2017-04-22_popcnt: } 49...Kc7 50.Kh3 { [%eval 524,28] } ) 50.g4 { [%eval 649,32] } 50...Nc7 { [%eval 609,31] } 51.Rc8 { [%eval 579,30] } 51...Rf4 { [%eval 910,34] } ( { pedantFishW_2017-04-22_popcnt: } 51...Re5 52.Nc3 Kd7 53.Rg8 Ke6 54.h5 Kf7 55.Rb8 Ne6 56.Rb7+ Kg8 57.Kg3 Nc5 58.Ra7 a4 59.Kf3 Rg5 60.Ra5 Kh7 61.Nxa4 Ne6 62.Rxg5 Nxg5+ 63.Kf4 Ne6+ 64.Kf5 Nd4+ 65.Ke4 Ne6 66.f4 Kh6 67.Nc3 Nc5+ 68.Ke3 Ne6 69.Ne4 Nc7 70.f5 { [%eval 579,30] } ) 52.f3 { [%eval 889,33] } 52...a4 { [%eval 896,34] } 53.Rd8 { [%eval 893,34] } 53...a3 { [%eval 895,31] } 54.h5 { [%eval 860,36] } 54...Rf7 { [%eval 885,30] } 55.Rd6+ { [%eval 878,33] } 55...Kb5 { [%eval 862,30] } 56.Rd4 { [%eval 860,31] } 56...Kc6 { [%eval 831,30] } 57.Nc3 { [%eval 817,30] } 57...Rh7 { [%eval 861,29] } 58.Ra4 { [%eval 837,30] } 58...Nb5 { [%eval 32720,44] } ( { pedantFishW_2017-04-22_popcnt: } 58...Rh8 59.Rxa3 Ne6 60.Ra6+ Kd7 61.Ne4 Nc7 62.Ra5 Kc6 63.Kg3 Kb6 64.Ra3 Ne6 65.Kh4 Ng7 66.Ra4 Rh6 67.Ra8 Rc6 68.f4 Ne6 69.f5 Nc7 70.Rb8+ Ka7 71.Rb4 Nd5 72.Rd4 Ne3 73.f6 Rc7 74.h6 Rh7 75.Ra4+ Kb6 76.g5 Nf5+ 77.Kg4 Nxh6+ 78.gxh6 Rxh6 { [%eval 837,30] } ) 59.Nxb5 { [%eval 32712,32] } 59...Kxb5 { [%eval 32726,61] } 60.Rxa3 { [%eval 32728,56] } 60...Kc4 { [%eval 32732,57] } 61.f4 { [%eval 32734,56] } 61...Rb7 { [%eval 32736,46] } 62.h6 { [%eval 32736,55] } 62...Rb2+ { [%eval 32736,48] } 63.Kf3 { [%eval 32732,67] } 63...Rh2 { [%eval 32732,64] } ( 63...Rb7 $5 64.g5 Rh7 65.Ra2 Kd5 66.Rg2 Kd4 67.g6 Rxh6 68.g7 Rh3+ 69.Kg4 Rc3 70.g8=Q Rc4 71.Qd8+ Kc5 72.Rb2 Ra4 73.Rc2+ Rc4 74.Qc7+ Kb5 75.Qxc4+ Ka5 76.Ra2+ Kb6 77.Rb2+ Ka5 78.Qb5# ) 1-0
[/pgn]

Commentaries of ?! and !? I added manually.
At the new end mate- scores are to be seen only by quoting the .pgn, and c+p into GUI, at 63th #18, back to 58th #24.

Guess after 17th move it's too early to announce mate but at least SF kept 18.Bh3 without comment, therefore I did so too.

thanks Peter... appreciate it...

[Waschbaer]

[Event ""]
[Site ""]
[Date "2017.4.23"]
[Round ""]
[White "CM16"]
[Black "Botv16"]
[TimeControl ""]
[Result "1-0"]


18. ...gxf4!

19.Bxe6+ Kh8 20.Rad1 Bc8 21.Bxd7 fxg3 22.Bxc6 gxh2+ 23.Kh1 Bg4 24.Nxh2 Bxd1 25.Rxd1 Nxc6 26.Rxd8 Raxd8 27.Nd5 Bc5 28.f4 Nd4 29.Qd1 Rd6 30.Ng4 Rg6 31.a4 Rfg8 32.Ndf6 Rd8 33.Qd3 Ne6 34.Qf3 Rg7 35.e5 Nd4 36.Qe4 Ne6 37.a5 Rd1+ 38.Kh2 Rd2+ 39.Kh3 Rd8 40.Kh4 Be7 41.axb6 a5 42.Kh3 a4 43.Nh5 Rg6 44.b7 a3 45.Qb1 Rdg8 46.b8=Q Rxg4 47.Qxg8+ Rxg8 48.Qb7 a2 49.Qa7 Rf8 50.Kg4 Rg8+ 51.Kf5 Nc7 52.Qxa2 Rf8+ 53.Ke4 Ra8 54.Qb2 Ne6 55.f5 Nc5+ 56.Ke3 Bg5+ 57.Kf3 Nd3 58.Qc3 Kg8 59.e6 Ra7 60.Qd4 Rf7 61.f6 Bxf6 62.Nxf6+ Kg7 63.exf7 Kxf7 64.Nd5 Kg8 65.Qf6 Ne5+ 66.Qxe5 h6 67.Qe7 Kh8 68.Nf6 h5 69.Qh7# 1-0

For Houdini 5 using IDeA 28.f4 looks wrong

28. f4 Rg8

The eval Houdini calculated is about 0 for 29. Nf3

So what would you play after 28. ... Rg8 ?

(Any hint how to post IDeA output?)

[Waschbaer]

The analysis as a picture (JPG)