WCCC 2017

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23rd World Computer Chess Championship 2017, from July 03 to 07, 2017, Snellius Building, Leiden University, Leiden, The Netherlands, in conjunction with the WCSC 2017, the Advances in Computer Games 15 conference , and the 20th Computer Olympiad.

Four participants played a triple round robin, time control 105 minutes per side plus 15 seconds increment per move (105+15). After nine rounds and two decisive games, first and third place required a play-off. First place and winner of the Shannon Trophy was again decided between Komodo and Jonny, third place between Shredder and Chiron. After two games with 2 x 45+15 and two further games with 2 x 20 + 10 time controls, all drawn Komodo won the last play-off of two games with 2 x 10 + 10 with White. Shredder became third after winning the second play-off pair.

=Final Standing=
 * CC Country Codes

=Participants = 23rd World Computer Chess Championship 2017, Leiden, NL The tournament will be all-play-all three times, so 9 rounds in total
 * CC Country Codes

=A New Format= On June 07, 2017, a few weeks before the upcoming WCCC 2017, ICGA president David Levy announced a new format (excerpt) :

Starting in 2018 the World Computer Chess Championship will be played as a match, between the reigning World Champion and a challenger chosen by a process which will be discussed amongst the ICGA Board and participants from recent years’ championships. That discussion will commence very soon after this year’s World Championship, which is taking place in Leiden from July 3rd-7th. This new format is akin to the FIDE World Championship (for human Chess players). ...

For the 2017 World Computer Chess Championship we are changing the format, removing the entry fee, and offering an expenses budget to each of the contestants. Our aim for 2017 will be to attract the strongest participants. There will be only 4 contestants, each of whom will receive 1,000 Euro for their expenses from the ICGA. The Komodo team have already indicated their acceptance, and we very much hope that some of the former World Champions and other leading programs will now find the event attractive and apply to participate. ...

=Photos & Games=

Jonny - Chiron
Jonny vs Chiron, Ubaldo Andrea Farina and Johannes Zwanzger just after the opening [Event "WCCC 2017"] [Site "Leiden"] [Date "2017.07.03"] [Round "2.1"] [White "Jonny"] [Black "Chiron"] [Result "1/2-1/2"]

1.d4 d5 2.Nf3 Nf6 3.c4 e6 4.g3 Bb4+ 5.Bd2 Be7 6.Bg2 O-O 7.O-O Nbd7 8.Qc2 c6 9.Bf4 b6 10.Rd1 Bb7 11.b3 c5 12.Nc3 dxc4 13.bxc4 cxd4 14.Rxd4 Bc5 15.Rdd1 Qe7 16.Na4 Be4 17.Qb3 e5 18.Bg5 Rfd8 19.Nxc5 Nxc5 20.Qa3 h6 21.Be3 Qc7 22.Bxc5 bxc5 23.Nh4 Bxg2 24.Nxg2 Rab8 25.Ne3 Rd4 26.Rab1 Rb6 27.Rb3 g6 28.Rdb1 Kg7 29.Qa5 Rxb3 30.Qxc7 Rxb1+ 31.Kg2 Rd2 32.Qxe5 Rb6 33.Kf3 Rxa2 34.g4 Kg8 35.h4 Re6 36.Qb8+ Kg7 37.Qb1 Rd2 38.Qa1 Kg8 39.Qxa7 Ne4 40.Nd5 Rd4 41.Kg2 Nd6 42.Qa8+ Kg7 43.g5 hxg5 44.hxg5 Re5 45.Qd8 Ne4 46.f4 Re6 47.Qa5 Rd1 48.Qa4 Rd2 49.Qa1+ Kg8 50.Qa8+ Kg7 51.Qa1+ Kg8 52.Qa8+ Kg7 53.Qa1+ Kg8 1/2-1/2

Komodo - Shredder
Komodo vs Shredder with queen versus three pieces out of book, Erdo's preparation finally payed off and Komodo is in the lead after two rounds [Event "WCCC 2017"] [Site "Leiden"] [Date "2017.07.03"] [Round "2.2"] [White "Komodo"] [Black "Shredder"] [Result "1-0"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Ndb5 Qb8 7.Be3 a6 8.Bb6 axb5 9.Nxb5 Bb4+ 10.c3 Ba5 11.Nc7+ Qxc7 12.Bxc7 Bxc7 13.Qg4 Kf8 14.Bb5 Nf6 15.Qf3 h5 16.a4 h4 17.O-O Rh5 18.b4 Kg8 19.h3 Ne7 20.Qe3 Re5 21.f3 Bb8 22.c4 d5 23.Qd2 Ng6 24.a5 Rh5 25.Kh1 Bf4 26.Qc2 Rg5 27.Rad1 Nh5 28.Rfe1 dxe4 29.fxe4 Bc7 30.c5 Ngf4 31.Rd2 Ng3+ 32.Kg1 Rb8 33.e5 f6 34.Bf1 fxe5 35.Qa4 Rf5 36.b5 Rf8 37.b6 Bd8 38.Rxd8 Rxd8 39.Rxe5 Rf8 40.Bc4 Bd7 41.Qxd7 Rbd8 42.Qxd8 Rxd8 43.Kf2 Kf7 44.c6 Kf6 45.Re3 bxc6 46.a6 Nf5 47.a7 Nd6 48.Ra3 c5 49.a8=Q Rxa8 1-0

Round 3
Chiron vs Komodo, Ubaldo Andrea Farina, Erdogan Günes and Fabien Letouzey watching [Event "WCCC 2017"] [Site "Leiden"] [Date "2017.07.04"] [Round "3.2"] [White "Chiron"] [Black "Komodo"] [Result "1/2-1/2"]

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.e5 Nfd7 5.f4 c5 6.Nf3 Nc6 7.Be3 Rb8 8.a3 cxd4 9.Nxd4 Bc5 10.Qd2 O-O 11.g3 a6 12.Bg2 Bxd4 13.Bxd4 Nxd4 14.Qxd4 Qc7 15.O-O b5 16.Rfc1 g5 17.Re1 gxf4 18.gxf4 Bb7 19.Rad1 Kh8 20.Nxd5 Bxd5 21.Bxd5 exd5 22.e6+ f6 23.exd7 Qxd7 24.Qxd5 Qg4+ 25.Kh1 Rbd8 26.Qxd8 Qf3+ 27.Kg1 Qg4+ 28.Kf2 Qxf4+ 29.Kg2 Qg4+ 30.Kf2 Qh4+ 31.Kf1 Qf4+ 32.Kg2 Qg4+ 33.Kf2 Qh4+ 34.Kg2 Qg4+ 1/2-1/2

Round 4
Shredder vs Chiron, David Levy, Ubaldo Andrea Farina and Stefan Meyer-Kahlen already observing draw scores All four games on July 04 ended with 3-fold repetitions [Event "WCCC 2017"] [Site "Leiden"] [Date "2017.07.04"] [Round "4.1"] [White "Shredder"] [Black "Chiron"] [Result "1/2-1/2"]

1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 Nf6 5.Nf3 Nbd7 6.Qc2 Bd6 7.Be2 dxc4 8.Bxc4 b5 9.Bd3 Bb7 10.e4 e5 11.Be3 O-O 12.Nxe5 Nxe5 13.dxe5 Bxe5 14.h3 a6 15.O-O Re8 16.Rfd1 Qc7 17.a4 h6 18.f3 Rad8 19.Ne2 Bh2+ 20.Kf1 Bd6 21.Qc3 Be5 22.Qc1 Bd6 23.axb5 axb5 24.Qc2 Nh5 25.Ra7 Ng3+ 26.Nxg3 Bxg3 27.Qc5 Re7 28.Ke2 Red7 29.Bc2 Rxd1 30.Bxd1 Qd7 31.Bc2 Bb8 32.Ra1 Qe6 33.Kf1 Be5 34.Ra7 Rd7 35.b3 g6 36.Qb6 Qe7 37.Ke2 g5 38.Qc5 Qf6 39.Ra2 Bf4 40.Qf5 Qd6 41.Qc5 Qf6 42.Qf5 Qd6 43.Qc5 Qc7 44.Kf1 Bxe3 45.Qxe3 Qg3 46.e5 Re7 47.Qe4 Qxe5 48.Qh7+ Kf8 49.Qxh6+ Ke8 50.Be4 c5 51.Qb6 Kf8 52.Qh6+ Ke8 53.Qb6 Kf8 54.Qh6+ Ke8 1/2-1/2

Komodo - Shredder
Komodo vs Shredder, Stefan Meyer-Kahlen hoping for a draw, David Levy, Ossi Weiner and Erdogan Günes [Event "WCCC 2017"] [Site "Leiden"] [Date "2017.07.06"] [Round "8.1"] [White "Komodo"] [Black "Shredder"] [Result "1/2-1/2"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Ndb5 Qb8 7.Be3 Nf6 8.f4 d6 9.Bd3 Be7 10.Qf3 O-O 11.O-O a6 12.Nd4 e5 13.Nde2 Nb4 14.h3 b5 15.Ng3 Bd7 16.Rad1 Nxd3 17.cxd3 b4 18.Nce2 Qb5 19.Kh1 Rac8 20.fxe5 dxe5 21.d4 Be6 22.Rd2 Kh8 23.dxe5 Nd7 24.Nd4 Qb8 25.Bf4 Nxe5 26.Qh5 Bf6 27.b3 a5 28.Qe2 Qb6 29.Be3 Be7 30.Ngf5 Bxf5 31.Nxf5 Bc5 32.Bf4 Qe6 33.Qb5 Ng6 34.Bd6 Rfd8 35.Qb7 Nh4 36.Rdd1 Nxf5 37.exf5 Qf6 38. Bxc5 Rxc5 39.Rxd8+ Qxd8 40.Qxf7 Rc7 41.Qe6 Rd7 42.Kh2 Rd6 43.Qe5 Rd5 44.Qe6 Rd6 45.Qe5 Rd5 46.Qf4 Rd4 47.Qf3 Rd3 48.Qc6 Rd6 49.Qc4 Rd4 50.Qc6 Rd6 51.Qe4 Rd4 52.Qf3 Rd3 53.Qe4 Rd4 54.Qe3 Rd3 55.Qf4 Rd4 56.Qe3 Rd3 57.Qf2 Qd6+ 58.Kg1 Kg8 59.f6 gxf6 60.Qxf6 Qxf6 61.Rxf6 a4 62.Rf3 Rd2 63.Rf4 Rxa2 64.Rxb4 axb3 65.Rxb3 Kg7 66.Rb4 h5 67.Rf4 Kg6 68.h4 Rc2 69.Kh2 Rc3 70.Rf3 Rc4 71.Kg3 Re4 72.Rf4 Re3+ 73.Kh2 Kg7 74.Rf5 1/2-1/2

Jonny - Chiron
Johannes Zwanzger and Ubaldo Andrea Farina. Jonny vs Chiron becomes the second decisive WCCC game. Jonny and Komodo in the lead now, playing black vs Shredder and Chiron in the last round [Event "WCCC 2017"] [Site "Leiden"] [Date "2017.07.06"] [Round "8.2"] [White "Jonny"] [Black "Chiron"]

1.d4 d5 2.Nf3 Nf6 3.c4 e6 4.g3 Bb4+ 5.Bd2 Be7 6.Bg2 O-O 7.O-O Nbd7 8.a4 a5 9.Qc2 c6 10.Na3 Nb6 11.b3 Nbd7 12.Bc1 Bb4 13.Bb2 Re8 14.Rfd1 Qe7 15.Nd2 h5 16.Qc1 b6 17.Nc2 Bd6 18.e4 Nxe4 19.Nxe4 dxe4 20.Bxe4 Bb7 21.Re1 Rad8 22.Qd2 h4 23.Rad1 Nf6 24.Bg2 Nh7 25.Qc3 Nf6 26.Qf3 Rd7 27.gxh4 Red8 28.Ne3 Bb4 29.Re2 Qf8 30.h5 Ba3 31.Ba1 Be7 32.Red2 Kh7 33.h3 Kg8 34.Bc3 Bb4 35.Bxb4 axb4 36.h6 c5 37.d5 Kh7 38.Qf4 Nh5 39.hxg7 Nxf4 40.gxf8=N+ Rxf8 41.dxe6 Rxd2 42.Rxd2 Bxg2 43.e7 Re8 44.Nxg2 Ng6 45.Rd6 Rxe7 46.Rxb6 Rd7 47.Rb5 Rd3 48.Rxc5 Rxb3 49.Rb5 Rb1+ 50.Kh2 b3 51.c5 Ne5 52.Nf4 b2 53.Kg2 Ra1 54.Rxb2 Rxa4 55.Re2 Nd7 56.Re7 Nxc5 57.Rxf7+ Kh6 58.h4 Ne4 59.Kf3 Rc4 60.Ke3 Ra4 61.Ng2 Nc3 62.Kf3 Kg6 63.Rf4 Ra5 64.Rd4 Kh6 65.Rd6+ Kh7 66.Ne3 Ra4 67.Ng4 Ne4 68.Rd7+ Kg8 69.Rd5 Rb4 70.h5 Kh8 71.Kxe4 1-0

Play-Off
The decisive 6th play-off game between Komodo and Jonny, Ubaldo Andrea Farina takes a photo Tournament director Jan Krabbenbos and ICGA president David Levy watching [Event "WCCC 2017"] [Site "Leiden"] [Date "2017.07.07"] [Round "15.2"] [White "Komodo"] [Black "Jonny"] [Result "1-0"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d3 a6 6.Bb3 d6 7.h3 Ba7 8.O-O O-O 9.Nbd2 h6 10.Re1 Na5 11.Bc2 c5 12.Nf1 b5 13.Ng3 Be6 14.Nh4 Nc6 15.Qf3 Rb8 16.Be3 Ng4 17.hxg4 Qxh4 18.Nf5 Qd8 19.Rad1 Qc7 20.g5 hxg5 21.Bxg5 f6 22.Bd2 Ne7 23.Qg4 Bxf5 24.exf5 d5 25.Re3 Qd7 26.Rf3 Rbc8 27.Re1 Rcd8 28.Bd1 a5 29.Rg3 Rf7 30.Rh3 c4 31.Qh4 Kf8 32.Qh8+ Ng8 33.Bh5 Qxf5 34.Rf3 Qe6 35.Bxf7 Qxf7 36.Rxe5 cxd3 37.Qh3 Qc7 38.Re6 Kf7 39.Ra6 Bb6 40.Rg3 Kf8 41.Qg4 Bc5 42.Rxd3 Be7 43.Qf3 Qc4 44.b3 Qc8 45.Rxa5 Qc6 46.Qg4 g5 47.Ra7 1-0

Winners
Johannes Zwanzger, Erdogan Günes, Stefan Meyer-Kahlen and David Levy

=Publications=
 * The Board of the ICGA (2017). Five ICGA Events in Leiden, the Netherlands: July, 2017. ICGA Journal, Vol. 39, No. 1
 * Jan Krabbenbos, Jaap van den Herik, Guy Haworth (2017). 23rd World Computer Chess Championship. pdf

=Postings=
 * 2017 Events in Leiden by Jan Krabbenbos, ICGA, April 22, 2017
 * Important announcement: World Computer Chess Championship by Mark Lefler, CCC, June 07, 2017
 * Important announcement: World Computer Chess Championship – A New Format by Mark Lefler on behalf of David Levy, ICGA, June 07, 2017
 * World Computer Chess Championship 2017 by Harvey Williamson, Hiarcs Forum, June 07, 2017
 * World Computer Chess Championship – The first success of a new format by Mark Lefler on behalf of David Levy, ICGA, June 19, 2017
 * Participants - World Computer Chess Championship (July 3rd-7th) by Mark Lefler, ICGA, June 19, 2017
 * WCCC pairings and games | ICGA by Jan Krabbenbos, ICGA, July 02, 2017
 * Re: 2017 World Computer Software Championship 2017 by Harvey Williamson, CCC, July 03, 2017
 * World Computer Chess Championship 2017: Komodo wins! by Ian Osgood, CCC, July 07, 2017
 * Re: World Computer Chess Championship 2017: Komodo wins! by Ian Osgood, CCC, July 07, 2017
 * Komodo and WCCC by Rodolfo Leoni, CCC, July 10, 2017

=External Links=
 * WCCC 2017 | ICGA
 * WCCC 2017 Results
 * Leiden University hosts world championship computer chess - Leiden University, July 08, 2017

=References=

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