11...O-O Stockfish vs AlphaZero, 2018   (D07) Queen's Gambit Declined, Chigorin Defense, 77 moves, 1-0 7...O-O D Mayers vs Fischer, 1953  (C33) King's Gambit Accepted, 17 moves, 1-0 13.O-O Moscow vs Riga, 1909  (D33) Queen's Gambit Declined, Tarrasch, 35 moves, 0-1 8.O-O C Carls vs Marshall, 1912  (A13) English, 63 moves, 0-1 8...O-O C Bauer vs J M Iruzubieta Villaluenga, 2010  (C53) Giuoco Piano, 22 moves, 1-0 5...O-O Lasker vs Steinitz, 1894  (D37) Queen's Gambit Declined, 52 moves, 1-0 10.O-O P Thoren vs V Faibisovich, 1998  (B42) Sicilian, Kan, 78 moves, 0-1 16.O-O-O S Williams vs The World, 2013  (A01) Nimzovich-Larsen Attack, 33 moves, 0-1 16...O-O Carlsen vs Wojtaszek, 2017  (B90) Sicilian, Najdorf, 44 moves, 1-0 15.O-O Pichot vs I Cheparinov, 2018  (B96) Sicilian, Najdorf, 28 moves, 0-1 8.O-O G Marcotulli vs A Stanitz, 1988 (C38) King's Gambit Accepted, 14 moves, 0-1 6...O-O S Irwanto vs J Lim, 2001  (D97) Grunfeld, Russian, 58 moves, 1-0 16...O-O G O'Toole vs R Haria, 2009  (C02) French, Advance, 41 moves, 1-0 9.O-O H Geiger vs W Wurm, 1926  (D48) Queen's Gambit Declined Semi-Slav, Meran, 39 moves, 0-1 8...O-O D Andreikin vs M Lagarde, 2018  (A80) Dutch, 35 moves, 1-0 18.O-O A Bagheri vs V Gaprindashvili, 2005 (A46) Queen's Pawn Game, 34 moves, 0-1 12...O-O Khalifman vs G Kjartansson, 2018 (D43) Queen's Gambit Declined Semi-Slav, 38 moves, 1-0 17.O-O-O R Felgaer vs Dreev, 2004  (B12) Caro-Kann Defense, 32 moves, 0-1 6.O-O Aronian vs Kramnik, 2018  (C65) Ruy Lopez, Berlin Defense, 27 moves, 0-1 10.O-O Rozentalis vs B Bok, 2014  (C48) Four Knights, 55 moves, 0-1 6...O-O Radjabov vs V S Gujrathi, 2019  (D38) Queen's Gambit Declined, Ragozin Variation, 36 moves, 1-0 14...O-O E Can vs N Sakr, 2010  (B00) Uncommon King's Pawn Opening, 33 moves, 1-0 5.O-O P Gems vs S Meenakshi, 2011 (C78) Ruy Lopez, 32 moves, 0-1 9.O-O-O J Saksis vs Shirov, 1985  (B99) Sicilian, Najdorf, 7...Be7 Main line, 37 moves, 0-1 8...O-O Sawyer Tom vs K Bateman, 2018  (A65) Benoni, 6.e4, 40 moves, 1-0 16.O-O-O Team White vs Team Black, 2007  (000) Chess variants, 33 moves, 0-1 9.O-O-O V Keymer vs V Kovalev, 2019  (A10) English, 61 moves, 0-1 8...O-O M Bosboom vs V Ouwendijk, 2006  (A80) Dutch, 22 moves, 1-0 14.O-O Aung Thant Zin vs R Antonio, 2001  (B90) Sicilian, Najdorf, 46 moves, 0-1 4...O-O Eljanov vs Lenderman, 2017  (E32) Nimzo-Indian, Classical, 57 moves, 0-1 8...O-O I Cheparinov vs D Mastrovasilis, 2017 (D42) Queen's Gambit Declined, Semi-Tarrasch, 7.Bd3, 32 moves, 1-0 8.O-O-O Areshchenko vs A Demchenko, 2017 (B67) Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7, 54 moves, 0-1 17.O-O-O K Walter vs G Schebler, 1990  (C34) King's Gambit Accepted, 59 moves, 0-1 10...O-O Topalov vs Kharlov, 2004  (D20) Queen's Gambit Accepted, 44 moves, 1-0 17...O-O Kasimdzhanov vs Topalov, 2004  (B40) Sicilian, 42 moves, 1-0 15.O-O-O 0-1 C Fegan vs A Byrne, 2016  (C00) French Defense, 15 moves, 0-1 7...O-O Vachier-Lagrave vs Ju Wenjun, 2019  (A06) Reti Opening, 33 moves, 1-0 5...O-O Kramnik vs Nunn, 1992  (E81) King's Indian, Samisch, 33 moves, 1-0 15...O-O Aronian vs D Cawdery, 2017  (A16) English, 39 moves, 1-0 15.O-O D Cawdery vs Aronian, 2017  (C45) Scotch Game, 39 moves, 0-1 11.O-O A Smirnov vs Karjakin, 2017  (D40) Queen's Gambit Declined, Semi-Tarrasch, 62 moves, 0-1 16.O-O-O J D Ruiz Castillo vs So, 2017  (B18) Caro-Kann, Classical, 59 moves, 0-1 4...O-O S Vaibhav vs G Jones, 2019  (E70) King's Indian, 49 moves, 1-0 8.O-O D Justice vs M Sana, 2010  (C45) Scotch Game, 36 moves, 0-1 8.O-O Lipschutz vs I Orchard, 1898  (C39) King's Gambit Accepted, 25 moves, 0-1 13.O-O Kramnik vs Anand, 2008  (D49) Queen's Gambit Declined Semi-Slav, Meran, 41 moves, 0-1 9.O-O Dennis Posocco vs Ezra Terryn, 2017  (B21) Sicilian, 2.f4 and 2.d4, 11 moves, 0-1 8...O-O-O R Brieger vs J Camarena, 1956  (B00) Uncommon King's Pawn Opening, 26 moves, 1-0 8...O-O-O K Spraggett vs F South, 1976  (B00) Uncommon King's Pawn Opening, 19 moves, 1-0 9...O-O I Lipnitsky vs Smyslov, 1950  (D13) Queen's Gambit Declined Slav, Exchange Variation, 42 moves, 1-0 20...O-O Ivanchuk vs Duda, 2017  (A50) Queen's Pawn Game, 29 moves, 1-0 16...O-O Ganguly vs A Filippov, 2009  (E20) Nimzo-Indian, 39 moves, 1-0 11.O-O E Pedersen vs I Branicki, 1952  (C63) Ruy Lopez, Schliemann Defense, 48 moves, 0-1 7.O-O-O I Aloni vs I Branicki, 1952  (A54) Old Indian, Ukrainian Variation, 4.Nf3, 53 moves, 0-1 5...O-O Goryachkina vs F Blohberger, 2018 (E81) King's Indian, Samisch, 30 moves, 1-0 10.O-O Spassky vs Korchnoi, 1977  (C19) French, Winawer, Advance, 66 moves, 0-1 17...O-O-O Van der Wiel vs Hort, 1981  (B12) Caro-Kann Defense, 40 moves, 1-0 6.O-O H Wolf vs Tarrasch, 1903  (C63) Ruy Lopez, Schliemann Defense, 46 moves, 0-1 16.O-O-O L L Labatt vs E F Schrader, 1914  (A40) Queen's Pawn Game, 34 moves, 0-1 8.O-O A Acosta vs W A Rodriguez, 2001 (C43) Petrov, Modern Attack, 19 moves, 0-1 8...O-O Ed. Lasker vs G A Thomas, 1912  (A40) Queen's Pawn Game, 18 moves, 1-0 5...O-O Nepomniachtchi vs B Adhiban, 2017  (E90) King's Indian, 36 moves, 1-0 10.O-O Anand vs A Kovalyov, 2017  (B90) Sicilian, Najdorf, 43 moves, 0-1 5...O-O M Hebden vs N Birnboim, 1992  (D02) Queen's Pawn Game, 26 moves, 1-0 6...O-O R Karch vs J Eade, 1987 (C34) King's Gambit Accepted, 17 moves, 1-0 8...O-O G Gundersen vs A H Faul, 1928  (C02) French, Advance, 15 moves, 1-0 5.O-O F Lupi vs Alekhine, 1946  (C42) Petrov Defense, 22 moves, 0-1 9.O-O-O N Bijlsma vs D Brandenburg, 2009  (B89) Sicilian, 25 moves, 0-1 7...O-O J Sulc vs V Paroulek, 1968  (C31) King's Gambit Declined, Falkbeer Counter Gambit, 51 moves, 1-0 7...O-O Spassky vs P Tumurbator, 1960  (C31) King's Gambit Declined, Falkbeer Counter Gambit, 37 moves, 1-0 7...O-O Von Gottschall vs A Levin, 1902  (C31) King's Gambit Declined, Falkbeer Counter Gambit, 14 moves, 1-0 13...O-O Bronstein vs Ljubojevic, 1973  (B03) Alekhine's Defense, 41 moves, 1-0 13.O-O-O A David vs G Kallai, 1996  (B12) Caro-Kann Defense, 30 moves, 0-1 15...O-O S Atalik vs Sax, 1997  (E37) Nimzo-Indian, Classical, 26 moves, 1-0 19...O-O Wei Yi vs A Fier, 2019  (B45) Sicilian, Taimanov, 34 moves, 1-0 13...O-O Harrwitz vs Anderssen, 1848  (C33) King's Gambit Accepted, 17 moves, 1-0 15...O-O A Krstulovic vs F Kaczur, 2015  (D38) Queen's Gambit Declined, Ragozin Variation, 20 moves, 0-1 25...O-O Botvinnik vs Keres, 1966  (A29) English, Four Knights, Kingside Fianchetto, 27 moves, 1-0 13.O-O-O Indjic vs A Hakobyan, 2019  (C10) French, 21 moves, 0-1 8.O-O Reti vs Sune Grape, 1929  (C28) Vienna Game, 10 moves, 0-1 5...O-O-O Morozevich vs I Rogers, 1999  (B01) Scandinavian, 26 moves, 1-0 8.O-O-O Y Hou vs C Li, 2011  (B67) Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7, 36 moves, 0-1 7...O-O-O R Steel vs R Macdonald Ross, 1884  (C25) Vienna, 26 moves, 1/2-1/2 13.O-O Hering vs D Przepiorka, 1904  (B30) Sicilian, 55 moves, 0-1 17.O-O Fischer vs B Allen, 1964  (B57) Sicilian, 25 moves, 0-1 6...O-O Charousek vs Maroczy, 1895  (C13) French, 15 moves, 1-0 9...O-O Steinitz vs G Neumann, 1867  (C25) Vienna, 34 moves, 1-0 7.O-O-O J Walsh vs F Bohatirchuk, 1954 (A45) Queen's Pawn Game, 22 moves, 0-1 8...O-O S Palatnik vs Geller, 1980  (A45) Queen's Pawn Game, 15 moves, 1-0 8.O-O-O T Stepovaia vs N Kosintseva, 2009  (B67) Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7, 38 moves, 0-1 9.O-O C Brewer vs F Rayner, 2015  (B22) Sicilian, Alapin, 64 moves, 0-1 11.O-O-O B Huguet vs Matulovic, 1968  (B48) Sicilian, Taimanov Variation, 20 moves, 0-1 9...O-O Malinin vs V Savinov, 1988  (A58) Benko Gambit, 36 moves, 1-0 16.O-O-O Duda vs Dubov, 2019 (B32) Sicilian, 54 moves, 0-1 12...O-O-O T Palmer vs R Present, 1986  (B12) Caro-Kann Defense, 30 moves, 1-0 25.O-O D Andreikin vs Vachier-Lagrave, 2019  (B23) Sicilian, Closed, 36 moves, 0-1 11.O-O-O Kovalenko vs Vachier-Lagrave, 2019  (B23) Sicilian, Closed, 64 moves, 0-1 20...O-O-O J van Foreest vs Y Yu, 2020  (B40) Sicilian, 75 moves, 1-0 6...O-O So vs Anand, 2020  (C53) Giuoco Piano, 26 moves, 1-0 4...O-O V Artemiev vs V Kovalev, 2020  (E20) Nimzo-Indian, 44 moves, 1-0 26...O-O-O R Mamedov vs N Grandelius, 2020 (C58) Two Knights, 51 moves, 1-0 101 games