lichess.org: 90/30 Tournament #1, round 1, board 5

[Hasimir]

My return to playing online has led me to <a>Lichess</a>, which is a brilliant little site and one which is free to boot. As with many such sites it is the bullet and blitz games which appear to receive the most attention. That said, there are enough people there who prefer a slower pace and some of us have formed the first tournament on that site being run to 90/30 time rules. My first round was on Thursday and though I was hopeful and did a little studying of my opponent, with the rating gap I expected to lose.

As the game progressed, however, it became quite intense and I achieved a thing I had not expected at all, I won!

Here's the notation with just a couple of notes from me regarding the endgame (yes, I use the same username there as here):

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[Event "90/30 Tournament #1"]
[Site "http://lichess.org/pOTbKxg9"]
[Date "2014.07.24"]
[Round "1.5"]
[White "coolpant"]
[Black "Hasimir"]
[Result "0-1"]
[Annotator "Hasimir"]
[BlackElo "1225"]
[ECO "B90"]
[EventDate "2014.07.21"]
[Opening "Sicilian Defense, Najdorf Variation, Byrne (English) Attack"]
[TimeControl "5400+30"]
[Variant "Standard"]
[WhiteElo "1649"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 { Sicilian Defense, Najdorf Variation, Byrne (English) Attack } 6...e5 7.Nb3 Be6 8.Be2 Be7 9.Qd2 Nbd7 10.h3 O-O 11.g4 b5 12.Nd5 Nxe4 13.Nxe7+ Qxe7 14.Qb4 f5 15.O-O-O Ndf6 16.gxf5 Bxf5 17.h4 Rac8 18.c3 Qe6 19.f3 a5 20.Qxb5 Ng3 21.Rhe1 Nxe2+ 22.Rxe2 Bg6 23.Red2 Qf5 24.Rd3 Qxf3 25.Nd2 Qe2 26.Nf1 Bxd3 27.Qxd3 Qxd3 28.Rxd3 Ng4 29.Nd2 Nxe3 30.Rxe3 Rf4 31.Rd3 e4 32.Rxd6 e3 33.Nb3 e2 { Stockfish at lichess.org says this is a blunder, but I recall consciously doing it in order to bring the Rook on f4 up the following turn. } 34.Re6 Rf1+ 35.Kd2 e1=Q+ 36.Rxe1 Rd8+ { I tried to avoid losing the Rook, but clearly that wasn't going to fly. } 37.Ke2 Rxe1+ 38.Kxe1 Re8+ 39.Kf2 Rf8+ 40.Ke3 Rb8 41.c4 a4 42.Nd4 Rxb2 43.c5 Kf7 44.Ke4 Rxa2 45.Kd5 Rd2 46.c6 Ke7 47.Kc5 a3 48.c7 { I nearly did 48... Rc2+?? here, which would have been terrible. } 48...Kd7 { White resigns } 0-1

The Stockfish analysis performed on lichess.org that I refer to is this:

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[Event "Rated game"]
[Site "http://lichess.org/pOTbKxg9"]
[Date "2014.07.24"]
[Round "?"]
[White "coolpant"]
[Black "Hasimir"]
[Result "0-1"]
[Annotator "lichess.org"]
[BlackElo "1225"]
[ECO "B90"]
[EventDate "2014.07.21"]
[Opening "Sicilian Defense, Najdorf Variation, English Attack"]
[TimeControl "5400+30"]
[Variant "Standard"]
[WhiteElo "1649"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 { Sicilian Defense, Najdorf Variation, English Attack } 6...e5 7.Nb3 Be6 8.Be2 Be7 9.Qd2 Nbd7 10.h3 O-O 11.g4 $6 { (-0.09 → -0.60) Inaccuracy. The best move was a4. } ( 11.a4 Rc8 12.O-O Bxb3 13.cxb3 Nc5 14.Bxc5 dxc5 15.Qe3 Qc7 16.Bc4 Rfd8 17.Nd5 Nxd5 18.Bxd5 h6 ) 11...b5 12.Nd5 $6 { (-0.54 → -1.28) Inaccuracy. The best move was O-O-O. } ( 12.O-O-O Qc7 13.Bf3 Nb6 14.Bxb6 Qxb6 15.g5 Nd7 16.h4 b4 17.Nd5 Bxd5 18.exd5 a5 19.Qe3 a4 ) 12...Nxe4 13.Nxe7+ Qxe7 14.Qb4 f5 15.O-O-O Ndf6 16.gxf5 Bxf5 17.h4 $2 { (-1.62 → -2.76) Mistake. The best move was Nd2. } ( 17.Nd2 Qf7 18.Qb3 Qxb3 19.axb3 Nxd2 20.Rxd2 Rac8 21.c3 Ne4 22.Rdd1 Be6 ) 17...Rac8 18.c3 Qe6 19.f3 $2 { (-3.00 → -4.32) Mistake. The best move was Rhg1. } ( 19.Rhg1 Nd5 20.Rxd5 Qxd5 21.f3 Nc5 22.Nxc5 dxc5 23.Qa3 Bd3 24.Bd1 Bg6 25.Be2 c4 26.Rd1 ) 19...a5 $2 { (-4.32 → -2.06) Mistake. The best move was Ng3. } ( 19...Ng3 20.Rxd6 Qe7 21.Rh2 Nd5 22.Bg5 Nxe2+ 23.Rxe2 Qxg5+ 24.hxg5 Nxb4 25.Na5 Rcd8 26.Nb7 Nd3+ 27.Kd2 ) 20.Qxb5 Ng3 21.Rhe1 Nxe2+ 22.Rxe2 Bg6 23.Red2 $2 { (-1.93 → -3.07) Mistake. The best move was Rg2. } ( 23.Rg2 Qf5 24.Rxg6 hxg6 25.Nd2 Rb8 26.Qe2 d5 27.Bc5 Rfc8 28.Bd6 ) 23...Qf5 24.Rd3 Qxf3 25.Nd2 $2 { (-3.33 → -5.80) Mistake. The best move was Bg5. } ( 25.Bg5 Bxd3 26.Qxd3 Ne4 27.Nxa5 Qxd3 28.Rxd3 Rf1+ 29.Kc2 Rf2+ 30.Kb1 Kf7 31.a4 Ke6 32.Nb3 h6 ) 25...Qe2 26.Nf1 Bxd3 $2 { (-5.91 → -3.76) Mistake. The best move was Rb8. } ( 26...Rb8 27.Ng3 Qxd1+ 28.Rxd1 Rxb5 29.Rxd6 ) 27.Qxd3 Qxd3 28.Rxd3 Ng4 29.Nd2 Nxe3 $2 { (-5.20 → -3.68) Mistake. The best move was e4. } ( 29...e4 30.Nxe4 Rce8 31.Nxd6 Rxe3 32.Rxe3 Nxe3 33.Kd2 Nf5 34.Ne4 Nxh4 35.b4 Rd8+ 36.Ke3 ) 30.Rxe3 Rf4 31.Rd3 e4 32.Rxd6 $2 { (-4.18 → -6.01) Mistake. The best move was Rh3. } ( 32.Rh3 d5 33.Kd1 Kf7 34.a4 Rb8 35.b3 Ke6 36.Rg3 g6 37.Rh3 Rc8 38.Ke2 Kd6 39.b4 d4 ) 32...e3 33.Nb3 $2 { (-5.87 → -8.15) Mistake. The best move was Kd1. } ( 33.Kd1 exd2 34.h5 Rf1+ 35.Kc2 Rh1 36.Rxd2 Rxh5 37.b3 Rf5 38.c4 h5 39.Rh2 g6 40.Kd3 ) 33...e2 $4 { (-8.15 → -5.06) Blunder. The best move was Rf1+. } ( 33...Rf1+ 34.Kc2 e2 35.Re6 e1=Q 36.Rxe1 Rxe1 37.Nxa5 Re2+ 38.Kb1 Rh2 39.a3 Rxh4 40.Nb7 g5 41.Nd6 ) 34.Re6 Rf1+ $2 { (-5.02 → -3.68) Mistake. The best move was a4. } ( 34...a4 35.Na5 Rf2 36.Kd2 e1=R+ 37.Kxe1 Rxb2 38.Rc6 Rxc6 39.Nxc6 Rxa2 40.Kd1 Rh2 41.Kc1 Rxh4 42.Kb2 ) 35.Kd2 e1=Q+ $6 { (-3.60 → -3.03) Inaccuracy. The best move was Rb1. } ( 35...Rb1 36.Nd4 Rxb2+ 37.Kd3 Rxa2 38.Nxe2 Rd8+ 39.Nd4 Rh2 40.Ra6 Rxh4 41.Rxa5 Rh3+ 42.Kc2 Rc8 43.Ra3 ) 36.Rxe1 Rd8+ $2 { (-3.05 → -1.72) Mistake. The best move was Rxe1. } ( 36...Rxe1 37.Kxe1 Rb8 38.Nxa5 Rxb2 39.a4 Ra2 40.Nc6 Rxa4 41.Nd4 Ra2 42.Ne2 Ra1+ 43.Kd2 Rh1 44.c4 ) 37.Ke2 $2 { (-1.72 → -3.04) Mistake. The best move was Nd4. } ( 37.Nd4 Rf4 38.h5 Rf5 39.h6 Rf2+ 40.Re2 Rxe2+ 41.Kxe2 gxh6 42.Ke3 h5 43.b4 Rc8 ) 37...Rxe1+ 38.Kxe1 Re8+ $2 { (-3.15 → -1.25) Mistake. The best move was Rb8. } ( 38...Rb8 39.Nxa5 Rxb2 40.a4 Ra2 41.Nc6 Rxa4 42.Nb4 Ra5 43.Kd2 Rh5 44.c4 Rxh4 45.Kd3 Kf7 46.Nc2 ) 39.Kf2 $2 { (-1.25 → -2.63) Mistake. The best move was Kd2. } ( 39.Kd2 Re5 40.Kd3 Rh5 41.Nd4 Rxh4 42.b4 axb4 43.cxb4 Rh2 44.Nc2 Rh6 45.b5 Rd6+ 46.Kc4 h5 ) 39...Rf8+ 40.Ke3 Rb8 41.c4 $6 { (-2.25 → -3.09) Inaccuracy. The best move was Nxa5. } ( 41.Nxa5 Rxb2 42.c4 Rxa2 43.Nc6 Kf7 44.Nd4 Ra5 45.Ke4 Rc5 46.Kd3 h6 47.Nf3 Ke6 48.Kd4 Ra5 ) 41...a4 42.Nd4 Rxb2 43.c5 Kf7 44.Ke4 $2 { (-3.43 → -4.69) Mistake. The best move was a3. } ( 44.a3 Rh2 45.Ke4 Rxh4+ 46.Kd5 Rh3 47.c6 Ke7 48.Nb5 Rb3 49.Kc5 Kd8 50.Nd4 Rxa3 51.Ne6+ Kc8 ) 44...Rxa2 45.Kd5 $2 { (-4.92 → -6.97) Mistake. The best move was c6. } ( 45.c6 Ke7 46.Nf5+ Kd8 47.Nd4 a3 48.Kd5 ) 45...Rd2 46.c6 Ke7 47.Kc5 $2 { (-7.31 → -14.14) Mistake. The best move was Kc4. } ( 47.Kc4 a3 48.Nb3 Rc2+ 49.Kb4 a2 50.Ka3 Kd6 51.c7 Kxc7 52.Na1 Rh2 53.Nb3 Kb6 54.Na1 Kc5 ) 47...a3 48.c7 Kd7 { White resigns } 0-1

According to that I was the only one to make a blunder and yet I still succeeded in the end. That analysis isn't really that clear as to how significant the move was and what difference it might have made. Obviously this required a closer look. So for most of the last twenty-four hours my system has been busily working at analysing this game, first using Deep HIARCS 14 WCSC and then using Stockfish 5 64 (configured with multithreading to use all CPU cores). I've added extra PGN headers with the analysis configuration details (e.g. setting it to an average of 300 seconds per move, the hardware available, etc.).

I ran Deep HIARCS 14 WCSC first and this was the result:

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[Event "90/30 Tournament #1"]
[Site "http://lichess.org/pOTbKxg9"]
[Date "2014.07.24"]
[Round "1.5"]
[White "coolpant"]
[Black "Hasimir"]
[Result "0-1"]
[AnalysisConfig "Average 300s per move, all moves, for both Black and White."]
[AnalysisDate "2014.07.25"]
[AnalysisEngine "Hash: 1024Mb, Nalimov cache: 512Mb, cores: 4, threads: 8"]
[AnalysisSystem "2.6Ghz Intel i7 Quad Core, 8Gb RAM, 64-bit OS"]
[Annotator "Deep HIARCS 14 WCSC"]
[BlackElo "1225"]
[ECO "B90"]
[EventDate "2014.07.21"]
[Opening "Sicilian Defense, Najdorf Variation, Byrne (English) Attack"]
[TimeControl "5400+30"]
[Variant "Standard"]
[WhiteElo "1649"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 { Sicilian Defense, Najdorf Variation, Byrne (English) Attack } 6...e5 7.Nb3 Be6 8.Be2 Be7 9.Qd2 Nbd7 10.h3 O-O 11.g4 b5 12.Nd5 $2 { Deep HIARCS 14 WCSC:-1.64/25 } ( 12.Rg1 { Deep HIARCS 14 WCSC:-0.54/23 } 12...b4 13.Nd5 a5 14.Qd3 Bxd5 15.exd5 a4 16.Nd2 Nc5 17.Qc4 Qb8 18.g5 Nfd7 19.Qg4 Qb7 20.Ne4 a3 21.b3 Nxe4 22.Qxe4 f5 23.gxf6 Nxf6 24.Qf5 Qc8 25.Qe6+ Rf7 26.Qxc8+ Rxc8 27.O-O-O Bd8 28.Ba6 Rc3 29.Bd2 ) 12...Nxe4 13.Nxe7+ Qxe7 14.Qb4 f5 15.O-O-O Ndf6 16.gxf5 Bxf5 17.h4 $6 { Deep HIARCS 14 WCSC:-3.07/24 } ( 17.Rhg1 { Deep HIARCS 14 WCSC:-1.74/23 } 17...Qc7 18.Na1 Rac8 19.f3 Nc5 20.Kb1 Be6 21.Qh4 ) 17...Rac8 18.c3 Qe6 19.f3 $2 { Deep HIARCS 14 WCSC:-6.28/26 } ( 19.Rhg1 { Deep HIARCS 14 WCSC:-3.28/24 } 19...Nd5 20.Rxd5 Qxd5 21.f3 Nc5 22.Nxc5 dxc5 23.Qb3 Qxb3 24.axb3 Bg6 25.c4 b4 26.Kd2 Bh5 27.Rg3 Rf7 ) 19...a5 $2 { Deep HIARCS 14 WCSC:-2.69/25 } ( 19...Ng3 { Deep HIARCS 14 WCSC:-6.28/26 } 20.Rxd6 Nd5 21.Rxe6 Nxb4 22.Rxe5 Nxh1 23.a3 Rce8 24.Rxe8 Rxe8 25.axb4 Rxe3 26.Kd2 Re6 27.Nd4 Rd6 28.f4 Bd7 29.Bf3 Ng3 30.Ke3 Nf5+ 31.Nxf5 Bxf5 ) 20.Qxb5 Ng3 21.Rhe1 Nxe2+ 22.Rxe2 Bg6 23.Red2 $2 { Deep HIARCS 14 WCSC:-4.59/25 } ( 23.Rg2 { Deep HIARCS 14 WCSC:-2.62/23 } 23...a4 24.Qxa4 Ra8 25.Na5 Nd5 26.Rxg6 hxg6 ) 23...Qf5 24.Rd3 Qxf3 25.Nd2 $2 { Deep HIARCS 14 WCSC:-8.42/27 } ( 25.Bg5 { Deep HIARCS 14 WCSC:-4.58/25 } 25...Bxd3 26.Qxd3 Qxd3 27.Rxd3 a4 28.Nd2 Rc6 29.c4 d5 30.Ra3 dxc4 31.Kc2 Nd5 32.Ne4 Nb4+ 33.Kc3 Rb8 34.Rxa4 Nd5+ 35.Kc2 ) 25...Qe2 26.Nf1 Bxd3 $6 { Deep HIARCS 14 WCSC:-7.35/30 } ( 26...Rb8 { Deep HIARCS 14 WCSC:-8.91/26 } 27.Ng3 Bxd3 28.Nxe2 Bxb5 29.Ng3 Ne8 30.Ne4 Rf1 31.Rxf1 Bxf1 32.Nd2 Bd3 33.Nf3 Nf6 34.Ne1 Bg6 ) 27.Qxd3 Qxd3 28.Rxd3 Ng4 29.Nd2 Nxe3 $6 { Deep HIARCS 14 WCSC:-5.73/28 } ( 29...e4 { Deep HIARCS 14 WCSC:-7.15/28 } 30.Nxe4 Rce8 31.Ba7 Rxe4 32.Rxd6 Re2 33.Rd2 Rf1+ 34.Kc2 Rxd2+ 35.Kxd2 Rh1 36.Bb8 Rxh4 37.b3 Rh5 ) 30.Rxe3 Rf4 31.Rd3 $6 { Deep HIARCS 14 WCSC:-6.82/28 } ( 31.Re2 { Deep HIARCS 14 WCSC:-5.67/27 } 31...Rxh4 32.Ne4 Rc6 33.Ng3 Rf4 34.a3 a4 ) 31...e4 32.Rxd6 $6 { Deep HIARCS 14 WCSC:-11.18/28 } ( 32.Rh3 { Deep HIARCS 14 WCSC:-6.82/30 } 32...Re8 33.Re3 d5 34.Nb3 Rf1+ 35.Kc2 Rf2+ 36.Kc1 Ref8 37.Re1 Rf1 38.Rxf1 Rxf1+ ) 32...e3 33.Nb3 e2 $6 { Deep HIARCS 14 WCSC:-8.16/35 } ( 33...Rf1+ { Deep HIARCS 14 WCSC:-15.15/29 } 34.Kc2 Rf2+ 35.Kb1 Re8 36.Nd4 Rd2 ) 34.Re6 Rf1+ 35.Kd2 e1=Q+ 36.Rxe1 Rd8+ $2 { Deep HIARCS 14 WCSC:-3.04/29 } ( 36...Rxe1 { Deep HIARCS 14 WCSC:-7.21/34 } 37.Kxe1 Rb8 38.Kd2 a4 39.Nc1 ) 37.Ke2 $2 { Deep HIARCS 14 WCSC:-7.35/32 } ( 37.Nd4 { Deep HIARCS 14 WCSC:-3.04/29 } 37...Rxe1 38.Kxe1 Re8+ 39.Kd2 Re4 40.Nf3 Rg4 41.Kd3 Rg2 42.Nd2 Rg3+ 43.Kc2 Rg4 44.h5 Rh4 45.a4 Rxa4 46.c4 Kf7 47.Kc3 Ra2 48.Kc2 Ke7 49.Nf3 Ra4 50.b3 Ra1 ) 37...Rxe1+ 38.Kxe1 Re8+ $6 { Deep HIARCS 14 WCSC:-4.34/31 } ( 38...Rb8 { Deep HIARCS 14 WCSC:-7.15/33 } 39.Nxa5 Rxb2 40.a4 Rh2 41.c4 Rxh4 ) 39.Kf2 $6 { Deep HIARCS 14 WCSC:-6.88/33 } ( 39.Kd2 { Deep HIARCS 14 WCSC:-4.34/31 } 39...Re4 40.h5 Re5 41.h6 gxh6 42.Nd4 h5 ) 39...Rf8+ 40.Ke3 Rb8 41.c4 $6 { Deep HIARCS 14 WCSC:-8.23/31 } ( 41.Nxa5 { Deep HIARCS 14 WCSC:-6.66/32 } 41...Rxb2 42.Nb3 Rh2 43.c4 Rxh4 ) 41...a4 42.Nd4 Rxb2 43.c5 Kf7 44.Ke4 $2 { Deep HIARCS 14 WCSC:-16.21/27 } ( 44.a3 { Deep HIARCS 14 WCSC:-7.70/33 } 44...Ra2 45.Nb5 Rh2 46.c6 Ke7 47.Nd4 Kd6 ) 44...Rxa2 45.Kd5 Rd2 46.c6 Ke7 47.Kc5 a3 48.c7 Kd7 { White resigns } 0-1

Then I decided to see whether, under the same configuratin conditions, Stockfish could shed more light on things. The answer to that was a resounding yes, now I get why it has reached the top of the computer engine rankings and I also get why it determined 33... e2 to be a blunder. That particular line ends with:

[fen]3q4/5k2/8/K5p1/1P4N1/P7/4r3/2r5 w - - 1 61[/fen]

Not quite checkmate, but not far off it. Have a look:

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[Event "90/30 Tournament #1"]
[Site "http://lichess.org/pOTbKxg9"]
[Date "2014.07.24"]
[Round "1.5"]
[White "coolpant"]
[Black "Hasimir"]
[Result "0-1"]
[AnalysisConfig "Average 300s per move, all moves, for both Black and White."]
[AnalysisDate "2014.07.25"]
[AnalysisEngine "Hash: 1024Mb, Nalimov cache: 512Mb, cores: 4, threads: 8"]
[AnalysisSystem "2.6Ghz Intel i7 Quad Core, 8Gb RAM, 64-bit OS"]
[Annotator "Stockfish 5 64"]
[BlackElo "1225"]
[ECO "B90"]
[EventDate "2014.07.21"]
[Opening "Sicilian Defense, Najdorf Variation, English Attack"]
[TimeControl "5400+30"]
[Variant "Standard"]
[WhiteElo "1649"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 { Sicilian Defense, Najdorf Variation, English Attack } 6...e5 7.Nb3 Be6 8.Be2 Be7 9.Qd2 Nbd7 10.h3 O-O 11.g4 $6 { Stockfish 5 64:-0.66/36 } ( 11.a4 { Stockfish 5 64:-0.24/34 } 11...Nb6 12.O-O Qc7 13.Rfd1 Rad8 14.a5 Nc4 15.Bxc4 Qxc4 16.Bb6 Rc8 17.f3 Nd7 18.Bf2 h6 19.Ra4 Qc7 20.Raa1 Rfd8 21.Ra4 Kh7 22.Raa1 Qc6 23.Qd3 Kg8 24.Kh1 Bc4 25.Qd2 Rf8 26.Rac1 Be6 27.Be3 ) 11...b5 12.Nd5 $6 { Stockfish 5 64:-1.61/39 } ( 12.a3 { Stockfish 5 64:-0.66/35 } 12...Nb6 13.Na5 Rc8 14.g5 Nfd7 15.O-O-O Qc7 16.Bf3 Nc5 17.Kb1 Nca4 18.Nd5 Bxd5 19.exd5 Nc4 20.Nxc4 bxc4 21.Qb4 Nxb2 22.Bb6 Qb7 23.Kxb2 Rb8 24.Kc3 Qxb6 25.Qxb6 Rxb6 26.Rb1 ) 12...Nxe4 13.Nxe7+ Qxe7 14.Qb4 f5 15.O-O-O Ndf6 16.gxf5 Bxf5 17.h4 $2 { Stockfish 5 64:-2.82/36 } ( 17.Rhg1 { Stockfish 5 64:-1.68/32 } 17...Qc7 18.Bd3 Nd5 19.Qe1 Nxe3 20.fxe3 Rac8 21.Qe2 Nf2 22.Bxf5 Rxf5 23.Rdf1 Rcf8 24.Nd2 Qf7 25.Rg2 Nd3+ 26.Qxd3 Rxf1+ 27.Nxf1 Qxf1+ 28.Qxf1 Rxf1+ 29.Kd2 Kf7 30.Rh2 Ke6 31.Kd3 d5 32.h4 g6 33.a3 Rf3 34.Ke2 Rf8 35.Rh1 Rc8 ) 17...Rac8 18.c3 $6 { Stockfish 5 64:-3.46/35 } ( 18.Na1 { Stockfish 5 64:-2.82/34 } 18...Qe6 19.Qb3 Qxb3 20.axb3 d5 21.f3 Ng3 22.Rh2 d4 23.Bg5 Nd5 24.Rg1 Nh5 25.Bd2 Nhf4 26.Re1 Kf7 27.Bxf4 Nxf4 28.Kd2 Kf6 29.h5 Rc6 30.Bd3 Bxd3 31.cxd3 Rfc8 32.Rg1 Kf5 33.Rhh1 R8c7 34.Rg3 Kf6 35.Rgg1 Kf5 ) 18...Qe6 19.f3 $6 { Stockfish 5 64:-5.30/38 } ( 19.Rhg1 { Stockfish 5 64:-3.40/33 } 19...Nd5 20.Rxd5 Qxd5 21.h5 Rc6 22.Na5 Rc7 23.Qb3 Qxb3 24.axb3 Be6 25.f3 Nf6 26.h6 Nd5 27.Kd2 Nxe3 28.Kxe3 g6 29.b4 d5 30.Bd1 Kf7 31.Nb3 Rc4 32.Nc5 Rh4 33.Bb3 d4+ 34.cxd4 exd4+ 35.Kd3 Bxb3 36.Nxb3 Rxh6 37.Ra1 Rh2 ) 19...a5 $2 { Stockfish 5 64:-2.56/35 } ( 19...Ng3 { Stockfish 5 64:-5.30/38 } 20.Rxd6 Qe7 21.Re1 Nd5 22.Bg5 Qxg5+ 23.hxg5 Nxb4 24.Bd1 Nd3+ 25.Rxd3 Bxd3 26.Rxe5 Bc4 27.Nc5 Bxa2 28.Nxa6 Bc4 29.Nb4 Rf5 30.Rxf5 Nxf5 31.b3 Be6 32.Kb2 Rd8 33.Kc1 Ne3 34.Be2 Bxb3 35.Bxb5 Bc4 36.Bxc4+ Nxc4 37.f4 Ne3 38.Kb2 Rf8 39.Nd3 Nd5 40.c4 ) 20.Qxb5 Ng3 21.Rhe1 Nxe2+ 22.Rxe2 Bg6 23.Red2 $2 { Stockfish 5 64:-4.21/41 } ( 23.Rg2 { Stockfish 5 64:-2.40/32 } 23...Qf5 24.Rxg6 hxg6 25.Bb6 Qxf3 26.Bxa5 Qf4+ 27.Kb1 Qxh4 28.Qd3 Qe4 29.Qxe4 Nxe4 30.Nd2 Nxd2+ 31.Rxd2 Rf1+ 32.Kc2 Kf7 33.Rxd6 g5 34.Rd2 Ke6 35.a4 Ra1 36.b3 g4 37.Kd3 Rf1 38.Rg2 Kf5 39.Bb4 Rc6 40.c4 ) 23...Qf5 24.Rd3 Qxf3 25.Nd2 $2 { Stockfish 5 64:-7.68/40 } ( 25.Bg5 { Stockfish 5 64:-3.77/35 } 25...Bxd3 26.Qxd3 Ne4 27.Qxf3 Rxf3 28.Nxa5 Kf7 29.Re1 d5 30.Nb3 Rg3 31.Nd2 Nxg5 32.hxg5 e4 33.Nb3 Rxg5 34.Nd4 Ra8 35.a3 h5 36.Re2 g6 37.Rh2 Kf6 38.Rf2+ Ke5 39.Nc6+ Ke6 40.Nd4+ Ke7 ) 25...Qe2 26.Nf1 Bxd3 $6 { Stockfish 5 64:-5.41/37 } ( 26...Rb8 { Stockfish 5 64:-7.33/35 } 27.Ng3 Bxd3 28.Nxe2 Bxb5 29.Ng3 Ne8 30.Ne4 Rf3 31.Re1 Rh3 32.b3 Rxh4 33.Nd2 Bd3 34.Bf2 Rh2 35.Bg3 Rg2 36.Re3 Bg6 37.c4 Nf6 38.Bh4 Rb7 39.Kd1 Rg1+ 40.Re1 Rg4 41.Rh1 Rg2 42.Rh3 Ne4 43.Nxe4 Bxe4 44.c5 dxc5 45.Re3 g5 46.Rg3 Rxg3 47.Bxg3 Bb1 ) 27.Qxd3 Qxd3 28.Rxd3 Ng4 29.Nd2 Nxe3 $6 { Stockfish 5 64:-4.82/35 } ( 29...e4 { Stockfish 5 64:-6.15/33 } 30.Nxe4 Rce8 31.Ba7 Rxe4 32.Rxd6 Ne5 33.Rd2 Rxh4 34.Re2 Nd3+ 35.Kc2 Rh3 36.Re3 Rxe3 37.Bxe3 Nf4 38.b4 Nd5 39.Bg1 axb4 40.c4 Nf4 41.Kb3 h5 42.Kxb4 Kf7 43.a4 Rb8+ 44.Kc5 Ra8 45.Kb5 Ne2 46.Be3 ) 30.Rxe3 Rf4 31.Rd3 $6 { Stockfish 5 64:-6.18/36 } ( 31.Rh3 { Stockfish 5 64:-4.98/34 } 31...d5 32.Nf3 e4 33.Nd4 Rf1+ 34.Kc2 Rf2+ 35.Kb1 a4 36.Rg3 Rcf8 37.Rg1 Rf1+ 38.Rxf1 Rxf1+ 39.Kc2 Rf2+ 40.Kc1 e3 41.b3 Rxa2 42.bxa4 e2 43.Nf3 Kf7 44.a5 h6 45.h5 Kf6 46.a6 Kf5 47.a7 ) 31...e4 32.Rxd6 $2 { Stockfish 5 64:-11.75/41 } ( 32.Rd4 { Stockfish 5 64:-6.10/37 } 32...d5 33.Kd1 Rf2 34.Rxd5 e3 35.Ne4 Rxb2 36.Rd3 Rxa2 37.Rxe3 ) 32...e3 33.Nb3 $2 { Stockfish 5 64:-20.83/41 } ( 33.Re6 { Stockfish 5 64:-9.27/35 } 33...exd2+ 34.Kxd2 Rf2+ 35.Kd3 Rxb2 36.a4 Ra2 37.Rb6 Rxa4 38.h5 Ra3 39.Kd4 Raxc3 40.Ra6 R3c5 41.h6 gxh6 42.Rxh6 Rc3 43.Re6 Kf7 44.Rh6 Kg7 45.Rb6 h5 46.Rb1 R8c5 47.Rb7+ Kg6 48.Rb8 Kf7 49.Rh8 a4 ) 33...e2 $6 { Stockfish 5 64:-8.58/37 } ( 33...Rf1+ { Stockfish 5 64:-20.83/41 } 34.Kc2 e2 35.Re6 e1=Q 36.Rxe1 Rxe1 37.Nd4 Rh1 38.Kb3 Rxh4 39.Nf3 Rh3 40.Nd4 Rh2 41.Ka3 Rf2 42.Ne6 h5 43.Ng5 Rb8 44.b3 h4 45.c4 Rc8 46.Nh3 Rh2 47.Nf4 Kf7 48.Nh5 Rc2 49.Nf4 Re8 50.c5 g5 51.Nh5 h3 52.Ng3 h2 53.c6 Rxc6 54.Ka4 Rc5 55.b4 Rc3 56.Nh1 Rc1 57.Nf2 Re2 58.Ng4 h1=Q 59.a3 Qd1+ 60.Kxa5 Qd8+ ) 34.Re6 Rf1+ $6 { Stockfish 5 64:-5.37/37 } ( 34...a4 { Stockfish 5 64:-6.72/37 } 35.Kd2 axb3 36.axb3 Rxh4 37.c4 ) 35.Kd2 e1=Q+ 36.Rxe1 Rd8+ $2 { Stockfish 5 64:-2.38/33 } ( 36...Rxe1 { Stockfish 5 64:-6.43/42 } 37.Kxe1 Rb8 38.Nxa5 Rxb2 39.Nc6 Rxa2 40.Ne5 Rh2 41.Nf3 Rc2 42.Ng5 ) 37.Ke2 $2 { Stockfish 5 64:-4.30/47 } ( 37.Nd4 { Stockfish 5 64:-2.38/33 } 37...Rf4 38.Rh1 Rf2+ 39.Kc1 Rb8 40.Nc2 Re8 41.Nd4 a4 42.Rd1 Rb8 43.b4 Rc8 44.Rd3 Rxa2 45.Kb1 Rf2 46.b5 a3 47.Ka1 Rb2 48.Rf3 Re8 49.Rf1 Rf8 50.Rb1 ) 37...Rxe1+ 38.Kxe1 Re8+ $6 { Stockfish 5 64:-4.24/40 } ( 38...Rb8 { Stockfish 5 64:-6.15/42 } 39.Kd1 a4 40.Nc5 Rxb2 41.a3 Rh2 42.Nxa4 Rxh4 43.Nb6 Rh6 44.Nd5 Ra6 45.Ke2 Rxa3 46.Ke3 Ra5 ) 39.Kf2 Rf8+ 40.Ke3 Rb8 41.c4 $6 { Stockfish 5 64:-6.87/48 } ( 41.Nxa5 { Stockfish 5 64:-4.54/41 } 41...Rxb2 42.Nc4 Rxa2 43.Ne5 Rh2 44.Nf3 Rg2 45.Ng5 Rg4 46.Nf3 Kf8 47.Kd2 Ke7 48.Kd3 Kf6 49.Ke3 Kf5 50.Nd4+ Ke5 51.Nf3+ Kf6 52.h5 Ke6 53.Kf2 Ra4 54.Nd4+ Kf6 55.h6 gxh6 56.Nb5 h5 57.Nd4 Ra2+ 58.Kg3 Ra3 59.Ne2 Ra5 60.Kh4 Rc5 61.Ng3 Kg6 62.Ne2 ) 41...a4 42.Nd4 Rxb2 43.c5 Kf7 44.Ke4 Rxa2 45.Kd5 Rd2 46.c6 Ke7 47.Kc5 a3 48.c7 Kd7 { White resigns } 0-1

It's certainly given me a lot to examine and study, but I do hope the next instalment of Deep HIARCS will at least give it a run for its money.

[Christophermers]

It is remarkable, very valuable information