WCCC 2015

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21st World Computer Chess Championship 2015, from June 29, to July 03, 2015, Snellius Building, Leiden University, Leiden, The Netherlands, in conjunction with the WCSC 2015, Advances in Computer Games 14 , and the 18th Computer Olympiad. Jonny, by Johannes Zwanzger, brought home the gold on the 2400 core cluster, thanks to upset victories against Komodo in round 5 and HIARCS in round 9. Komodo is second and third place is shared by Hiarcs and Protector.

=Final Standing= 21st World Computer Chess Championship 2015, Leiden, NL
 * SBgr - Sonneborn-Berger score


 * CC Country Codes

=Participants= 21st World Computer Chess Championship 2015, Leiden, NL
 * CC Country Codes

=Blitz=

=Photos & Games=

Round 1 Impressions
Christian Sommerfeld and Johannes Zwanzger in Jonny - Fridolin, Steve Maughan of Maverick ...

Jonny - Fridolin
[Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.06.29"] [Round "1.4"] [White "Jonny"] [Black "Fridolin"] [Result "1-0"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.Ngf3 Nf6 5.e5 Nfd7 6.c3 Nc6 7.Bd3 Qb6 8.O-O cxd4 9.cxd4 Nxd4 10.Nxd4 Qxd4 11.Nf3 Qg4 12.h3 Qh5 13.Bg5 f6 14.exf6 gxf6 15.Re1 Qf7 16.Nd4 e5 17.Bh4 Bb4 18.Nf5 Nb6 19.Nh6 Qg7 20.Qh5+ Kf8 21.Re3 Bd2 22.Rf3 Bf4 23.Re1 Bxh3 24.Rxh3 Qxh6 25.Qxh6+ Bxh6 26.Bxf6 Bg7 27.Bxe5 Bxe5 28.Rxe5 h6 29.Rf3+ Kg8 30.Re6 Rh7 31.Bxh7+ Kxh7 32.Rf7+ Kg8 33.Rxb7 Rd8 34.Rg6+ Kf8 35.Rxh6 Kg8 36.Rg6+ Kf8 37.Rxa7 Nc8 38.Rh7 Re8 39.Rh8+ 1-0

Maverick - Komodo
... Steve Maughan of Maverick - Komodo, Harvey Williamson of HIARCS and Ingo Bauer operating Ginkgo [Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.06.29"] [Round "1.3"] [White "Komodo"] [Black "Maverick"] [Result "1-0"]

1.f4 d5 2.Nf3 g6 3.g3 Bg7 4.Bg2 c6 5.O-O Qb6+ 6.d4 Bf5 7.c4 dxc4 8.Re1 Be6 9.Na3 Nd7 10.e4 h5 11.Bf1 Qb4 12.Nc2 Qa5 13.Bd2 Qc7 14.Ne3 h4 15.d5 cxd5 16.exd5 Bf5 17.Nxc4 hxg3 18.hxg3 b5 19.Nce5 Ngf6 20.Rc1 Qb6+ 21.Be3 Qb7 22.Nc6 Be4 23.Bg2 Bxd5 24.Nxe7 Kxe7 25.Bc5+ Kd8 26.Ng5 Nxc5 27.Rxc5 Qb6 28.Nxf7+ Kd7 29.Ne5+ Kd8 30.Nc6+ Kc8 31.Ne7+ Kb8 32.b4 Bf8 33.Bxd5 Bxe7 34.Rxe7 Rd8 35.Re5 Nd7 36.Re6 Nxc5 37.Rxb6+ axb6 38.bxc5 bxc5 39.Qb3 Ra5 40.Bf3 Rd6 41.Qf7 Ra7 42.Qe8+ Kc7 43. Qe7+ Rd7 44.Qxc5+ Kd8 45.Bg4 Rab7 46.Qf8+ Kc7 47.Bxd7 Kxd7 48.f5 gxf5 49.Qxf5+ Kc7 50.Qf7+ Kb6 51.Qxb7+ Kxb7 52.Kf2 1-0

Komodo Team, Erdogan Günes and Mark Lefler

Ginkgo - Hiarcs
[Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.06.29"] [Round "1.2"] [White "Ginkgo"] [Black "Hiarcs"] [Result "1/2-1/2"]

1.d4 Nf6 2.c4 c6 3.Nc3 d5 4.Nf3 e6 5.Bg5 h6 6.Bh4 dxc4 7.e4 g5 8.Bg3 b5 9.Be2 Bb7 10.O-O Nbd7 11.Ne5 Bg7 12.Nxd7 Nxd7 13.Bd6 a6 14.a4 b4 15.Bxb4 Qb6 16.Ba3 Qxd4 17.Qc2 c5 18.Rad1 Qe5 19.Bxc4 Qc7 20.b3 Be5 21.h3 Rg8 22.Ne2 h5 23.Qd3 g4 24.h4 Qc6 25.Ng3 O-O-O 26.Qc2 f5 27.Bc1 Rdf8 28.Nxh5 Rh8 29.Nf4 Rxh4 30.Ng6 Bh2+ 31.Kh1 Rh7 32.Nxf8 Nxf8 33.Rfe1 Qe8 34.Qd3 Nd7 35.Qxd7+ Rxd7 36.Rxd7 Qxd7 37.Kxh2 Qd6+ 38.g3 Bxe4 39.Bg5 Kb7 40.Kg1 e5 41.Rxe4 fxe4 42.Kh1 Kb6 43.Kh2 Ka5 44.Be3 Kb4 45.Kg2 Qb6 46.Bd2+ Ka3 47.Be3 Kb2 48.Bd5 Qc7 49.Bc4 Kc2 50.Kf1 Kc3 51.Kg2 Qb6 52.Bd5 Kb4 53.Bc1 Qb8 54.Bd2+ Ka3 55.Be3 Qd6 56.Bg8 Qf8 57.Be6 Qe7 58.Bg8 Qf8 59.Be6 Qd6 60.Bg8 Qb6 61.Bc4 Qc6 62.Bc1+ Ka2 63.Be3 Qd6 64.Bg5 Qb6 65.Be3 Qc6 66.Bf7 Qb7 67.Bg8 Qa8 68.Bc4 Qc8 69.Bf7 Qc7 70.Bc4 Qb7 71.Bg8 Qc8 72.Bf7 Qf8 73.Be6 Qd6 74.Bc4 Kb2 75.Kf1 Qe7 76.Kg1 Qf8 77.Kg2 Qa8 78.Kg1 Qa7 79.Kg2 Kc2 80.Bd5 Qe7 81.Bg8 a5 82.Bc4 Kc3 83.Bd5 1/2-1/2

Protector - Shredder
Timo Haupt and Stefan Meyer-Kahlen in Protector - Shredder now with Bitboards [Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.06.29"] [Round "1.1"] [White "Protector"] [Black "Shredder"] [Result "1/2-1/2"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Be2 Nc6 7.O-O Nf6 8.Be3 Be7 9.f4 d6 10.a4 O-O 11.Kh1 Re8 12.Bf3 Bd7 13.Nxc6 Bxc6 14.a5 Rac8 15.Bb6 Qb8 16.Re1 Bd8 17.Bf2 b5 18.axb6 Bxb6 19.Bg3 Bc5 20.Rxa6 Qxb2 21.Qd3 Qb7 22.Rb1 Qd7 23.Bh4 Rb8 24.Rd1 Qb7 25.Rxc6 Qxc6 26.e5 Nd5 27.f5 Kh8 28.Ne4 Nf4 29.Nxd6 Qa4 30.Qe4 Qxe4 31.Bxe4 exf5 32.Bxf5 Nd5 33.Nxf7+ Kg8 34.Ng5 Kh8 35.Bxh7 Ne3 36.Re1 Rb4 37.Be4 Nxc2 38.Bxc2 Rxh4 39.Bg6 Ra8 40.Be4 Rb8 41.h3 Rf4 42.Kh2 Rf2 43.h4 Ra2 44.Kh3 Ra3+ 45.Kg4 Ra5 46.Re2 Be7 47.Nf3 Ra4 48.Kh3 Rc8 49.Bg6 Kg8 50.h5 Rc3 51.Rb2 Rb4 52.Ra2 Rbc4 53.Ra8+ Rc8 54.Ra7 R8c7 55.Ra1 R7c4 56.Ra2 Ra3 57.Rf2 Re3 58.Rf1 Ra3 59.Rb1 Bb4 60.Rd1 Be7 61.Rd7 Kf8 62.Kh2 Re3 63.Rb7 Rec3 64.Kg3 Bh4+ 65.Kh3 Be7 66.Kh2 Rc7 67.Rb1 R7c4 68.Rd1 Rc5 69.Re1 R5c4 70.Rf1 Rf4 71.Rd1 Rcc4 72.Rd3 Rc5 73.Kh3 Rfc4 74.Rd7 Rc7 75.Rd2 Rc3 76.Re2 Ba3 77.Kg4 R3c4+ 78.Be4 Bc1 79.Nh4 Rb4 80.Ng6+ Ke8 81.Nf4 Bxf4 82.Kxf4 Rc5 83.Kf5 Rb6 84.Bc2 Ke7 85.g4 Rf6+ 86.Kg5 Re6 87.Kf4 Rc4+ 88.Kf5 Rc3 89.Bb1 Rc1 90.Bc2 Rb6 91.Be4 Re6 92.Bd5 Ra6 93.Re4 Rc5 94.Bc4 Rf6+ 95.Kg5 Rh6 96.Bb3 Rb5 97.Re3 Rc5 98.Kf4 Rb6 99.Ba2 Ra5 100.Bg8 Ra4+ 101.Kf5 Rb8 102.Bh7 1/2-1/2

Fridolin - Ginkgo
Round 2, Fridolin vs. Ginkgo with some ICCA Journals, Christian Sommerfeld and Ingo Bauer, Richard Pijl on the right fighting the Komodo with his Baron [Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.06.29"] [Round "2.4"] [White "Fridolin"] [Black "Ginkgo"] [Result "0-1"]

1.c4 e5 2.Nc3 Nf6 3.g3 Bb4 4.Bg2 O-O 5.e4 Bxc3 6.dxc3 d6 7.Ne2 a6 8.O-O b5 9.cxb5 axb5 10.Qc2 Bb7 11.Rd1 Nbd7 12.Bg5 h6 13.Bxf6 Nxf6 14.c4 b4 15.a4 bxa3 16.bxa3 Nd7 17.Re1 Nc5 18.Nc3 Bc6 19.a4 Ra5 20.Nb5 Qd7 21.Ra3 Rfa8 22.Rea1 h5 23.Bf3 g6 24.Bg2 Kg7 25.f3 Qc8 26.R3a2 Qb8 27.Bf1 Qb6 28.Kg2 Qb7 29.Kg1 Qb8 30.Kg2 Be8 31.Kg1 h4 32.gxh4 Qd8 33.Ra3 c6 34.Nc3 Qxh4 35.Qf2 Qf6 36.Bg2 Ne6 37.Ne2 c5 38.Nc3 Nd4 39.Kh1 Bd7 40.Nd5 Qg5 41.Nb6 R8a7 42.Nxd7 Rxd7 43.Qb2 Rda7 44.Bf1 Qf4 45.Bg2 Ra8 46.h3 Rh8 47.Kg1 Qg3 48.Kf1 Raa8 49.Qa2 Rab8 50.Rd1 Rb4 51.Qf2 Qf4 52.Qd2 Qh2 53.a5 Rhb8 54.Ra2 Rb1 55.Qd3 R8b2 56.Rxb2 Rxb2 57.Rd2 Rb3 58.Qxb3 Nxb3 59.Ra2 Qf4 60.a6 Qc1+ 61.Kf2 Qb1 62.Re2 Qa1 63.Bf1 Qxa6 64.Re1 Nd4 65.h4 Qa2+ 66.Be2 Qd2 67.Kf1 Qf4 0-1

Maverick - Protector
Maverick - Protector and The Baron - Komodo in the background, Steve Maughan, Richard Pijl, slightly covered by Ingo Althöfer - explaing The Baron's PV to Johannes Zwanzger, and Timo Haupt of Protector [Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.06.29"] [Round "2.2"] [White "Maverick"] [Black "Protector"] [Result "0-1"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 dxc4 5.Bg2 a6 6.O-O Nc6 7.e3 Bd7 8.Nc3 Bd6 9.Qe2 b5 10.e4 e5 11.dxe5 Nxe5 12.Nxe5 Bxe5 13.f4 Bxc3 14.bxc3 c6 15.Be3 O-O 16.Bc5 Bg4 17.Qc2 Re8 18.Bd4 Rb8 19.h3 Bc8 20.Rad1 Qe7 21.Be5 Rb7 22.Bd6 Qd8 23.Bc5 Rd7 24.Bd4 Qc7 25.Bxf6 gxf6 26.Rxd7 Qxd7 27.Rd1 Qe7 28.Qe2 Rd8 29.Rxd8+ Qxd8 30.Bf1 Qb6+ 31.Kh2 c5 32.f5 Qd6 33.h4 Qe5 34.Qc2 Bb7 35.Bg2 b4 36.cxb4 c3 37.bxc5 Qxc5 38.Kh3 Bc6 39.h5 Qd4 40.Bf3 Ba4 41.Qc1 Qd2 42.Qxd2 cxd2 43.h6 d1=Q 44.Bxd1 Bxd1 45.Kg2 Kf8 46.Kf2 Ke7 47.Ke3 Kd6 48.Kd4 Be2 49.Kc3 Ke5 0-1

The Baron - Komodo
[Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.06.29"] [Round "2.3"] [White "The Baron"] [Black "Komodo"] [Result "0-1"]

1.d4 c6 2.e4 d5 3.e5 c5 4.dxc5 e6 5.Be3 Nd7 6.Nf3 Bxc5 7.Bxc5 Nxc5 8.Nbd2 Ne7 9.Nb3 b6 10.Bd3 Ng6 11.O-O O-O 12.Qd2 Nxd3 13.cxd3 d4 14.Rfe1 Bb7 15.Nbxd4 Qd5 16.Qg5 h6 17.Qg3 Qd7 18.h4 Rac8 19.h5 Ne7 20.Red1 Rfd8 21.Qf4 Bxf3 22.Nxf3 Qb5 23.Qd2 Qa4 24.Qe2 Qg4 25.Qe4 Qxh5 26.Rdc1 Rxc1+ 27.Rxc1 g5 28.g3 Qg6 29.Qb4 Rd7 30.Ne1 Qf5 31.Qa4 Rd8 32.Qxa7 Nd5 33.Qa4 Qxe5 34.Qc2 Kg7 35.Nf3 Qf5 36.Qe2 Nf6 37.Rc7 Rd5 38.d4 Nd7 39.Kg2 Qf6 40.Rc4 Qd8 41.Kg1 h5 42.Qe3 Rf5 43.a3 Nf6 44.Ne5 Nd5 45.Qe2 h4 46.Rc2 b5 47.Qe4 b4 48.axb4 hxg3 49.fxg3 Qa8 50.Nd3 Qb8 51.g4 Nf6 52.Qe3 Nxg4 53.Qh3 Nf6 54.Rh2 Ng8 55.Rf2 Nh6 56.Rh2 Rf6 57.Rg2 Qb5 58.Qe3 Rf5 59.b3 Kg6 60.Kh2 Kh7 61.Qe4 Kg7 62.Qe3 Kf8 63.Qh3 Ng8 64.Rc2 Qb8+ 65.Qg3 Qd8 66.Rc6 Ne7 67.Rc4 Nd5 68.Nf2 Kg7 69. Ng4 Rf1 70.Nf2 f6 71.Rc2 Nf4 72.Nh3 0-1

Round 3
Protector - The Baron, Jonny - Maverick, Wolfgang Reher watching

Protector - The Baron
[Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.06.30"] [Round "3.2"] [White "Protector"] [Black "The Baron"] [Result "1-0"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c6 5.Bg5 h6 6.Bh4 dxc4 7.e4 g5 8.Bg3 b5 9.Ne5 Nbd7 10.Nxc6 Qb6 11.d5 Bb7 12.a4 a6 13.Be2 Bxc6 14.dxc6 Qxc6 15.e5 Nd5 16.Nxd5 Qxd5 17.Qxd5 exd5 18.axb5 Bb4+ 19.Kd1 Nc5 20.bxa6 Ke7 21.f4 Nxa6 22.f5 Rhc8 23.Kc2 d4 24.Bf3 d3+ 25.Kd1 c3 26.bxc3 Bxc3 27.f6+ Kf8 28.Bxa8 Bxa1 29.Bb7 Rb8 30.Kd2 Nc5 31.Rxa1 Nb3+ 32.Kxd3 Nxa1 33.Bd5 Rd8 34.Ke4 Nc2 35.Bf2 Rc8 36.e6 fxe6 37.Bxe6 Rc3 38.g3 Rc6 39.Kf5 Nb4 40.Ba7 Rc1 41.Bb8 Rd1 42.Bc7 Rd2 43.Kg6 Nc6 44.g4 Nd8 45.Ba5 Rd4 46.Ba2 Nc6 47.Bc7 Rd7 48.Bg3 Rd2 49.Bc4 Na5 50.Bf1 Nb7 51.Be5 Nd6 52.Bc3 Rd1 53.Be2 Rb1 54.Bd4 Ke8 55.Bc4 Kd7 56.f7 1-0

Jonny - Maverick
[Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.06.30"] [Round "3.3"] [White "Jonny"] [Black "Maverick"] [Result "1-0"]

1.e4 c5 2.Nc3 Nc6 3.Bb5 Nd4 4.Bc4 e6 5.Nf3 Nf6 6.O-O a6 7.d3 b5 8.Bb3 Nxb3 9.axb3 Bb7 10.e5 Nd5 11.Nxd5 Bxd5 12.Be3 Qc7 13.c4 Bc6 14.d4 cxd4 15.Qxd4 Be7 16.Qg4 g6 17.Bh6 Rg8 18.cxb5 axb5 19.Rxa8+ Bxa8 20.Rc1 Qb8 21.Ng5 Bc6 22.Qd4 Rh8 23.Re1 b4 24.Bg7 Rg8 25.Bf6 Bxf6 26.exf6 Qc7 27.Rc1 h5 28.Ne4 d5 29.Qxb4 Kd7 30.Nc5+ Kc8 31.Na6 Qb7 32.Qa4 Kd7 33.Nc5+ Ke8 34.Qa3 Qe7 35.fxe7 f6 36.Nxe6 d4 1-0

Round 4
Shredder - HIARCS, Hans van der Zijden (back of head), ..., David Levy and Jaap van den Herik watching [Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.07.02"] [Round "4.1"] [White "Shredder"] [Black "Hiarcs"] [Result "0-1"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be7 8.O-O O-O 9.Kh1 Nc6 10.f3 Be6 11.Nd5 a5 12.Be3 a4 13.Nc1 Bxd5 14.exd5 Nd4 15.Bxd4 exd4 16.Qxd4 Qa5 17.c4 Nd7 18.Qd1 Bf6 19.Rb1 Rfe8 20.Nd3 Qb6 21.f4 Nc5 22.Nxc5 Qxc5 23.Qc2 Re3 24.Rfd1 g6 25.Bf1 b5 26.Bd3 b4 27.b3 axb3 28.axb3 Rae8 29.Rbc1 Kg7 30.Rf1 Qd4 31.Rcd1 Qc3 32.g3 Bd4 33.Rd2 h5 34.Qd1 f5 35.c5 Bxc5 36.Bb5 R8e4 37.Bc4 Rxc4 38.bxc4 Qxc4 39.Kg2 h4 40.Kh3 hxg3 41.hxg3 Qc3 42.Rg2 Kf7 43.Qa1 Qc4 44.Rd2 g5 45.Kh2 g4 46.Re1 b3 47.Rxe3 Bxe3 48.Rg2 Bd4 49.Qa8 b2 50.Qb7+ Kg6 51.Rxb2 Bxb2 52.Qxb2 Qxd5 53.Qe2 Kf7 54.Qc2 Qc5 55.Qb3+ d5 56.Qb2 d4 57.Qe2 Qd5 58.Qd3 Ke8 59.Kg1 Qe4 60.Qb3 Qe1+ 61.Kg2 Qc3 62.Qe6+ Kd8 63.Qxf5 d3 64.Qg5+ Kc7 65.Qe7+ Kc6 66.Qe4+ Kc5 67.Kf2 Qc2+ 68.Kf1 Qd1+ 69.Qe1 Qf3+ 70.Kg1 Kd4 71.Qe5+ Kc4 72.Qe1 Qd5 73.Qd2 Kb3 74.Qd1+ Kb4 75.Qd2+ Ka4 76.Qd1+ Qb3 77.Qa1+ Kb5 78.Kf2 Qc2+ 79.Ke3 Qe2+ 80.Kd4 d2 81.Qb1+ Kc6 82.Qc2+ Kd7 83.Qa4+ Ke7 84.Qb4+ Kf7 85.Qb7+ Kf6 86.Qb6+ Qe6 87.Qd8+ Qe7 88.Qh8+ Kg6 89.f5+ Kxf5 90.Qc8+ Kf6 91.Qh8+ Kg6 92.Kc4 Qe6+ 93.Kb5 d1=Q 94.Qh7+ 0-1

Round 5
Jonny - Komodo. Sometimes, a8 and h8 are important squares for White's pieces, after 148.Na8 [Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.07.01"] [Round "5.3"] [White "Jonny"] [Black "Komodo"] [Result "1-0"]

1.d4 c6 2.c4 Nf6 3.Nc3 d5 4.Nf3 a6 5.e3 g6 6.Bd3 Bg7 7.O-O O-O 8.Qc2 Bg4 9.Ne5 Be6 10.c5 Nbd7 11.Nxd7 Qxd7 12.Na4 Rae8 13.Nb6 Qc7 14.Bd2 Nd7 15.Na4 f6 16.f4 Bg4 17.h3 Be6 18.Kh1 Bh6 19.h4 Bg7 20.h5 f5 21.hxg6 hxg6 22.g4 Nf6 23.g5 Ne4 24.Kg2 Qb8 25.b3 Bd7 26.Nb6 Bc8 27.Rh1 Kf7 28.Raf1 Rh8 29.Ba5 Be6 30.Kf3 Rxh1 31.Rxh1 Rh8 32.Qg2 Qg8 33.Rh3 Rxh3+ 34.Qxh3 Ke8 35.Qh2 Kf7 36.Qh4 Qh8 37.Qxh8 Bxh8 38.Ke2 Bg7 39.Kd1 Ke8 40.Kc2 Bf7 41.Be1 Bg8 42.Kd1 Bf8 43.Na4 Bf7 44.Ke2 Kd7 45.Nb6+ Kd8 46.Ba5 Ke8 47.Na4 Be6 48.Bc7 Bg7 49.Ke1 Bf7 50.Nb6 Bg8 51.Kd1 Bf7 52.Kc1 Bg8 53.Kc2 Bh8 54.Bb8 Bg7 55.Kd1 Kd8 56.Bb1 Ng3 57.Bc2 Ne4 58.Na4 Kd7 59.Ke1 Bf7 60.Ke2 Kc8 61.Ba7 Kd8 62.Nb2 Kc7 63.Bb6+ Kd7 64.Kf1 Nc3 65.Nd1 Ne4 66.Kg2 Be6 67.Kg1 Bg8 68.Nb2 Ke8 69.Kf1 Kd7 70.Nd3 Nc3 71.Kf2 Ne4+ 72.Ke1 Kc8 73.Ba5 Kd7 74.a3 Bf7 75.a4 Be8 76.Kf1 Bf7 77.Bd1 Kc8 78.Ke1 Kd7 79.Bf3 Be6 80.Kf1 Bf7 81.Ke2 Ng3+ 82.Ke1 Ne4 83.Kd1 Ng3 84.Bg2 Kc8 85.Ke1 Kd7 86.Kd2 Ne4+ 87.Kc1 Be6 88.Kc2 Bf7 89.Kb2 Be6 90.Kb1 Kc8 91.Kc2 Kd7 92.Kc1 Bg8 93.Kd1 Ng3 94.Kc2 Ne4 95.Ne1 Kc8 96.Bb6 Bf7 97.Kc1 Kd7 98.Bf3 Ng3 99.Kd2 Nf1+ 100.Kd3 Ng3 101.Kc3 Ne4+ 102.Kb2 Ng3 103.Kc2 Nf1 104.Ng2 Bg8 105.Kc3 Ng3 106.Kb2 Ne4 107.Kc2 Bf7 108.Kd3 Bf8 109.b4 Bg7 110.Kc2 Ke6 111.Ne1 Be8 112.Bg2 Kf7 113.Nd3 Bd7 114.Bc7 Bc8 115.Kc1 Bd7 116.Bb6 Be8 117.Kd1 Ke6 118.Bc7 Bf8 119.Ke1 Kf7 120.Ne5+ Ke6 121.Ke2 Bg7 122.Nd3 Bf8 123.Be5 Nc3+ 124.Kd2 Ne4+ 125.Kc1 Kf7 126.Kd1 Bd7 127.Kc2 Be8 128.Kc1 Nc3129.Nf2 Nxa4 130.Kc2 b6 131.Nd3 b5 132.Kd2 Ke6 133.Bf3 Kf7 134.Bd1 Ke6 135.Bxa4 bxa4 136.Kc3 a3 137.Kb3 Kd7 138.Kxa3 Kc8 139.Kb3 Kb7 140.Ka4 Bd7 141.Ka5 Ka7 142.Nb2 Kb7 143.Na4 Bc8 144.Nb6 Be6 145.Na8 Bc8 146.Nc7 Ka7 147.Bh8 e6 148.Na8 Kxa8 149.Kb6 Bb7 150.Kc7 Ka7 151.Bf6 a5 152.bxa5 Ba8 153.Kd7 Bb7 154.Kxe6 Ba6 155.Kf7 Bc4 156.Kxg6 Ka6 157.Kf7 Bxc5 158.g6 1-0

Round 6
Harvey Williamson and Tessa Pijl in The Baron - HIARCS, Komodo - Ginkgo in the background

The Baron - Hiarcs
[Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.07.01"] [Round "6.2"] [White "The Baron"] [Black "Hiarcs"] [Result "1/2-1/2"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qb3 Nc6 6.Nbd2 d5 7.Bg2 Bd6 8.Qa4 Bb7 9.cxd5 exd5 10.Nc4 Bb4+ 11.Bd2 Bxd2+ 12.Ncxd2 O-O 13.O-O a5 14.Rac1 Qd6 15.e3 Nb4 16.Ne5 c5 17.Rfe1 Rfc8 18.a3 cxd4 19.exd4 Nc6 20.Qd1 Re8 21.Nxc6 Bxc6 22.Nf3 Rxe1+ 23.Qxe1 Bd7 24.Ne5 Rc8 25.Bf1 g6 26.Kg2 Rxc1 27.Qxc1 Ng4 28.Nxd7 Qxd7 29.Qf4 Qe6 30.Bb5 h6 31.h3 Nf6 32.Qe5 Nh7 33.h4 Nf8 34.b4 axb4 35.axb4 Qxe5 36.dxe5 Ne6 37.Bc6 Nc7 38.f4 d4 39.b5 Ne6 40.Kf3 Nc5 41.g4 Kg7 42.Bd5 Kf8 43.Bc4 Ke7 44.Ba2 f6 45.exf6+ Kxf6 46.Bc4 Kg7 47.g5 Kh7 48.Ke2 Kg7 49.Kd2 Kh8 50.Ke2 Kg7 51.Kd2 Kh8 52.Kd1 Kg7 53.Ke2 Kh7 54.Bf7 Kg7 55.Bd5 Kh8 56.Ba2 Kg7 57.Bc4 Kh7 58.Bd5 Kg7 59.Ba2 Kh8 60.Bb1 1/2-1/2

Komodo - Ginkgo
[Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.07.01"] [Round "6.3"] [White "Komodo"] [Black "Ginkgo"] [Result "1-0"]

1.f4 d5 2.Nf3 Nf6 3.b3 g6 4.Bb2 Bg7 5.e3 O-O 6.Be2 c5 7.O-O Nc6 8.Ne5 Qc7 9.Nxc6 Qxc6 10.Bf3 Bf5 11.d3 Qd7 12.a4 Rac8 13.Na3 Rfd8 14.h3 a6 15.a5 Ne8 16.Bxg7 Nxg7 17.Qe1 Qd6 18.e4 dxe4 19.Bxe4 Bxe4 20.dxe4 Qd2 21.Rf3 Qxe1+ 22.Rxe1 Rd4 23.c3 Rd7 24.Nc4 Rcd8 25.Kf2 Ne6 26.f5 Nc7 27.Nb6 Rd2+ 28.Re2 Nb5 29.Nd5 Rd1 30.Nxe7+ Kf8 31.Nd5 Rb1 32.g4 Rxb3 33.Kg2 g5 34.h4 gxh4 35.Rh3 Ra3 36.f6 Rd6 37.g5 Ra4 38.Nb6 Ra1 39.Rxh4 Rdd1 40.Rxh7 Kg8 41.Rg7+ Kf8 42.Kf3 Rd3+ 43.Re3 Rd2 44.e5 Nc7 45.g6 Rf1+ 46.Kg4 Rg2+ 47.Rg3 Rxg3+ 1-0

Round 7
HIARCS - Komodo [Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.07.02"] [Round "7.3"] [White "Hiarcs"] [Black "Komodo"] [Result "1/2-1/2"]

1.d4 c6 2.c4 Nf6 3.Nc3 d5 4.Nf3 dxc4 5.a4 e6 6.e4 Bb4 7.e5 Nd5 8.Bd2 b5 9.axb5 Bxc3 10.bxc3 cxb5 11.Ng5 Nc6 12.Qh5 Qe7 13.h4 Bd7 14.Rh3 b4 15.Ne4 O-O 16.Bg5 f6 17.exf6 gxf6 18.Bh6 Kh8 19.Bxf8 Qxf8 20.Bxc4 bxc3 21.Nc5 c2 22.Bxd5 exd5 23.Re3 Nxd4 24.Qxd5 Nf5 25.Re4 Rd8 26.Nxd7 Qa3 27.Rxa3 c1=Q+ 28.Ke2 Qxa3 29.Qxf5 Qa6+ 30.Kf3 Qd3+ 31.Kf4 Qd6+ 32.Ne5 a5 33.Kf3 fxe5 34.Qxe5+ Qxe5 35.Rxe5 Rf8+ 36.Ke2 Ra8 37.Re3 a4 38.Ra3 Kg7 39.g4 Kf6 40.Kd3 Ke5 41.Ke3 h5 42.gxh5 Kf6 43.Kf4 Kg7 44.Kg5 Ra5+ 45.Kg4 Ra8 46.f4 Kh6 47.f5 Rg8+ 48.Kh3 Ra8 49.f6 Kxh5 50.f7 Kg6 51.Rxa4 1/2-1/2

Blitz Playoff
Blitz Playoff game 1, Both games won by Komodo operated by Erdogan Günes vs. Shredder by Stefan Meyer-Kahlen, Mark Lefler, Ingo Bauer, Christian Sommerfeld, Mark Watkins, Jan Krabbenbos, Harvey Williamson, and Jaap van den Herik. Back of heads of Ingo Althöfer and Hans van der Zijden

Round 8
Jonny vs. Ginkgo now operated by its author, Komodo - Fridolin in the background

Jonny - Ginkgo
[Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.07.03"] [Round "8.2"] [White "Jonny"] [Black "Ginkgo"] [Result "1-0"]

1.d4 f5 2.g3 e6 3.Bg2 d5 4.Nf3 Nf6 5.c4 c6 6.O-O Bd6 7.Nc3 O-O 8.Qc2 Ne4 9.Be3 Nd7 10.Rac1 Qe8 11.Nxe4 dxe4 12.Nd2 e5 13.c5 exd4 14.Bxd4 Be5 15.Bxe5 Qxe5 16.b4 Nf6 17.Nc4 Qc7 18.f3 exf3 19.Rxf3 Be6 20.Nd6 g6 21.Re3 Bd5 22.Rd1 Rad8 23.a4 b6 24.Bxd5+ Nxd5 25.Qb3 a5 26.Rxd5 cxd5 27.Qxd5+ Kh8 28.Rd3 Rb8 29.Qd4+ Kg8 30.Qc4+ Kh8 31.Nb5 Qe7 32.Qd4+ Kg8 33.cxb6 Qxb4 34.Qxb4 axb4 35.a5 Rfe8 36.Nd4 Rec8 37.Kf2 Kf7 38.Rb3 Rc4 39.Nb5 Ke6 40.Nc7+ Kd6 41.Na6 Rb7 42.Nxb4 Re4 43.h4 Re5 44.Ra3 Re4 45.Nd3 Re8 46.Rb3 Ra8 47.Rb5 Kc6 48.Rc5+ Kd6 49.Kf3 Re7 50.Re5 Rd7 51.Kf4 Kc6 52.Nb4+ Kb7 53.Kg5 Rf7 54.Kh6 Rg8 55.Rb5 Ka8 56.a6 g5 1-0

Komodo - Fridolin
[Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.07.03"] [Round "8.3"] [White "Komodo"] [Black "Fridolin"] [Result "1-0"]

1.f4 d5 2.Nf3 Nf6 3.b3 Bf5 4.Bb2 e6 5.e3 Bb4 6.Bd3 Bxd3 7.cxd3 Nbd7 8.O-O O-O 9.Nc3 c6 10.d4 Re8 11.d3 c5 12.a3 cxd4 13.axb4 dxc3 14.Bxc3 a6 15.h3 Rc8 16.Qd2 Nh5 17.Kh2 Nb8 18.Nd4 Qd6 19.Rac1 Nf6 20.b5 axb5 21.Nxb5 Qb6 22.Nd4 Nc6 23.Rc2 Nd7 24.Rfc1 e5 25.Ba5 Qa6 26.Nf5 Ra8 27.Bc3 Qb6 28.fxe5 Ndxe5 29.Qf2 f6 30.Qg3 g6 31.b4 Rad8 32.Rf2 Rf8 33.Rcf1 Rde8 34.b5 Qxb5 35.Bxe5 Rxe5 36.Nh6+ Kg7 37.Ng4 Re7 38.Nxf6 Rxf6 39.Rxf6 Qxd3 40.Qf4 Qxe3 41.Rf7+ Rxf7 42.Qxf7+ Kh6 43.Qf8+ 1-0

Round 9
Shredder vs. Komodo and HIARCS vs. Jonny showdown in the early stages


 * Ulf Lorenz, Mark Watkins, Fabien Letouzey and Matej Guid (covered) are witness of the upcoming drama ...

Shredder - Komodo
Erdo after Komodo's victory vs.Shredder, still hoping for a playoff versus Jonny, since... [Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.07.03"] [Round "9.1"] [White "Shredder"] [Black "Komodo"] [Result "0-1"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ exf6 6.c3 Bd6 7.Bd3 O-O 8.Qc2 g6 9.Ne2 Re8 10.h4 Be6 11.h5 f5 12.Be3 Nd7 13.hxg6 hxg6 14.O-O-O Bd5 15.Rdg1 Be4 16.Bxe4 Rxe4 17.g3 Qe7 18.Rg2 Rxe3 19.fxe3 Qxe3+ 20.Qd2 Qxd2+ 21.Kxd2 Nf6 22.Kd3 Kg7 23.Rf1 Ng4 24.Rf3 c5 25.Kd2 Rd8 26.a4 a6 27.Rd3 c4 28.Rf3 Re8 29.a5 Bc7 30.Nf4 Nf6 31.Re2 Ne4+ 32.Kc2 Rd8 33.Nh3 Bxa5 34.Nf2 Nf6 35.Re5 Bb6 36.Re7 Rb8 37.Re5 Bc7 38.Rc5 Bd6 39.Rxc4 Rh8 40.Kd1 Ne4 41.Ra4 Nxf2+ 42.Rxf2 Bxg3 43.Rf1 Rd8 44.Ra5 f6 45.Rc5 Rd7 46.Ke2 f4 47.d5 b6 48.Rc8 Rxd5 49.Rc7+ Kh6 50.Rc6 Rb5 51.Rxf6 Kg5 52.Rc6 Kf5 53.b4 g5 54.Kd3 g4 55.c4 Rxb4 56.Rh1 Rb3+ 57.Kc2 Re3 58.Rh5+ Ke4 59.Rg6 Bf2 60.Rxg4 Rg3 61.Rgh4 Rg2 62.Rh3 f3 63.Kb3 Bg3 64.Rd5 f2 65.Rh7 Bf4 66.Re7+ Kf3 67.Rd3+ Kg4 68.Rd1 Rg3+ 69.Kc2 0-1

Hiarcs - Jonny
... since HIARCS vs. Jonny still looked drawish after 67... a4 [Event "WCCC 2015"] [Site "Leiden, The Netherlands"] [Date "2015.07.03"] [Round "9.2"] [White "Hiarcs"] [Black "Jonny"] [Result "0-1"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d3 d6 6.O-O a6 7.Bb3 Ba7 8.h3 h6 9.Be3 Bxe3 10.fxe3 O-O 11.Nbd2 Na5 12.Bc2 c5 13.d4 Qc7 14.Bd3 c4 15.Bc2 b5 16.Nh4 Kh7 17.Rxf6 gxf6 18.Qf3 Rg8 19.Nf1 Rg5 20.Ng3 Bxh3 21.Nh5 Be6 22.d5 Rf8 23.dxe6 fxe6 24.Rf1 Nb7 25.Nxf6+ Kh8 26.Qh3 Qe7 27.Ng4 Rxf1+ 28.Kxf1 Qg7 29.Nf2 Nc5 30.Qf3 Rg3 31.Qe2 Qf6 32.Nf3 h5 33.Qd1 Nb7 34.b3 Qg6 35.Nh1 Rg4 36.Qd2 Qg7 37.bxc4 bxc4 38.Ne1 h4 39.Bd1 Qf8+ 40.Nf2 Rg7 41.Bf3 Nc5 42.Qe2 Qb8 43.Qxc4 Qb5 44.Qe2 Qxe2+ 45.Kxe2 Rc7 46.Kd2 Kg7 47.Bd1 Kf6 48.Nf3 Rh7 49.Be2 Rh8 50.Kc2 Ke7 51.c4 a5 52.Bd1 Kf6 53.Kd2 Kf7 54.Kc3 Ke7 55.Bc2 Rf8 56.Kd2 Rh8 57.Kd1 Rf8 58.Kc1 Kd7 59.Kd2 Rh8 60.Ke2 Ke7 61.Ke1 Rb8 62.Nd1 Rh8 63.Kf1 Rb8 64.Kg1 Rb4 65.Nd2 Rb8 66.Kf2 Nd7 67.Nb3 a4 68.Nd2 a3 69.Kg1 Nf6 70.Nb1 Rg8 71.Kh1 Ng4 72.Nbc3 Kd7 73.Bd3 Kc6 74.Bf1 Kc5 75.Nb5 Nf6 76.Bd3 Kb4 77.Nc7 Rc8 78.Nxe6 Nd7 79.Ng7 Nb6 80.Nf5 Rc7 81.g4 hxg3 82.Kg2 Nxc4 83.Kxg3 Nb2 84.Nf2 Nxd3 85.Nxd3+ Kc3 86.Ne1 Rc6 87.Ne7 Rc5 88.Ng6 Rb5 89.Ne7 Rb2 90.Nd5+ Kc4 91.Nb6+ Rxb6 92.Nf3 Rb2 0-1

But a few moves later with a croud of spectators including Jaap Bus, Mark Watkins and Ulf Lorenz watching, ..

... Harvey had to resign, and Jonny is World Computer Chess Champion 2015!

Jonny's final Screen within the Shredder GUI

Winners
Blitz Winners: Johannes Zwanzger, Mark Lefler, Stefan Meyer-Kahlen

TD Jaap van den Herik awards Johannes Zwanzger with the Shannon Trophy

Winners WCCC 2015, authors and operators of Komodo, Jonny, HIARCS and Protector

=Organizing Committee=
 * Johanna Hellemons (Chair)
 * Jaap van den Herik
 * Walter Kosters
 * Aske Plaat

=Tournament Director=
 * Jaap van den Herik
 * Jan Krabbenbos (Assistent)
 * [[FILE:JanWCCC2015.JPG|none|border|text-bottom]]

=Booklet=
 * The 21st World Computer Chess Championship - The 18th Computer Olympiad (pdf)

=Publications=
 * The Board of ICGA (2015). Rules for the 21st World Computer-Chess Championship. ICGA Journal, Vol. 37, No. 4
 * Jaap van den Herik, Jan Krabbenbos (2015). 21st World Computer Chess Championship. (pdf)
 * Jan Krabbenbos, Jaap van den Herik, Guy Haworth (2015). WCCC 2015: The 21st World Computer Chess Championship. ICGA Journal, Vol. 38, No. 2
 * Jan Krabbenbos, Jaap van den Herik, Guy Haworth (2015). The World Computer Speed Chess Championship 2015. ICGA Journal, Vol. 38, No. 2

=Forum Posts=
 * ICGA's 2015 World Computer Chess Championship/Events by Mark Lefler, CCC, February 19, 2015
 * World Computer Chess Championship 2015 by Harvey Williamson, Hiarcs Forum, May 07, 2015
 * World Computer Chess Championship 2015 by Harvey Williamson, CCC, June 28, 2015
 * Maverick at WCCC 2015 by Steve Maughan, CCC, June 29, 2015
 * Fotos Computer-Olympiade Leiden 2015 by Ingo Althöfer, DGoB-Diskussionsforum, June 29, 2015 (German)
 * Komodo loses a game against Jonny ICGA by Dragon Mist, Rybka Forum, July 01, 2015
 * Jonny wins WCCC 2015 by Venator, Rybka Forum, July 03, 2015
 * Hiarcs-Jonny, WCCC 2015 by Jon Dart, CCC, July 06, 2015
 * Pictures from Leiden 2015 by Steve Maughan, CCC, July 11, 2015
 * Videos von der Computer Blitzschach WM Playoff 1 by Erdogan Günes, CSS Forum, July 20, 2015 (German)
 * Videos von der Computer Blitzschach WM Playoff 2 by Erdogan Günes, CSS Forum, July 20, 2015 (German)

=External Links=
 * 21st World Computer Chess Championship - Leiden 2015 (ICGA Tournaments)
 * ICGA Events July 2015 | ICGA
 * Computer Olympiad 2015 | ICGA
 * 2015 World Computer Blitz Playoff game 1 by Mark Lefler, YouTube Video
 * 2015 World Computer Blitz Playoff game 2 by Mark Lefler, YouTube Video
 * "Jonny" (Johannes Zwanzger) ist Weltmeister!, FC Bayern München - Schachabteilung, July 05, 2015 (German)
 * Wir sind Weltmeister (pdf) University of Bayreuth press release, July 10, 2015 (German)

=References=

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