The World Open chess tournament is an annual open chess tournament usually held in Philadelphia. The inaugural event was held in New York in 1973 with 732 players, and was won by Walter Browne. The tournament is divided into different sections, with typically 100–200 players in the top section. The 1986 edition had as many as 1507 participants, arguably a world record for a chess tournament. It is usually played in the first week of July, over Independence Day Weekend. All editions have been organized by the Continental Chess Association.

Winners

All players finishing equal first are listed; the winners after tie-breaks are boldfaced. ! # !! Year !! Location !! Winner !! Score 🇺🇸 Alan Trefler (US) || align=center|8/9 🇺🇸 Bernard Zuckerman (US) || align=center|8/9 🇺🇸 Ron Henley (US) || align=center|8/9 🇷🇴 Florin Gheorghiu (ROU) 🇺🇸 Bernard Zuckerman (US) 🇫🇮 Heikki Westerinen (FIN) 🇺🇸 Yasser Seirawan (US) 🇪🇸 Javier Lozano Sanz (ESP) 🇮🇸 Inguar Asmundsson (ISL) || align=center|7½/9 🏴󠁧󠁢󠁥󠁮󠁧󠁿 Tony Miles (ENG) 🇷🇴 Florin Gheorghiu (ROU) 🇺🇸 Walter Browne (US) 🇺🇸 Arthur Bisguier (US) 🇺🇸 Bernard Zuckerman (US) 🇺🇸 John Fedorowicz (US) || align=center|8/10 🇺🇸 Roman Dzindzichashvili (US) 🇷🇴 Florin Gheorghiu (ROU) 🏴󠁧󠁢󠁥󠁮󠁧󠁿 Tony Miles (ENG) 🇨🇦 Lawrence Day (CAN) || align=center|7½/9 🇺🇸 Dmitry Gurevich (US) 🇺🇸 Joel Benjamin (US) 🇺🇸 Michael Rohde (US) ||align=center| 7½/9 🇺🇸 John Fedorowicz (US) 🇺🇸 Dmitry Gurevich (US) 🇺🇸 Eugene Meyer (US) || align=center|7/8 🇦🇷 Miguel Quinteros (ARG) 🇮🇷 Kamran Shirazi (IRN) 🇺🇸 Leonid Bass (US) 🇺🇸 Vitaly Zaltsman (US) || align=center|7/8 🇺🇸 Dmitry Gurevich (US) 🇮🇱 Yehuda Gruenfeld (ISR) || align=center|7/9 🏴󠁧󠁢󠁥󠁮󠁧󠁿 Tony Miles (ENG) ||align=center|8/10 Alexander Chernin 🇺🇸 Michael Rohde (US) 🇺🇸 Walter Browne (US) 🇺🇸 Lev Alburt (US) 🇺🇸 Larry Christiansen (US) 🇺🇸 John Fedorowicz (US) 🇺🇸 Alexander Ivanov (US) 🇨🇴 Gildardo Garcia (COL) Vladimir Epishin ||align=center|7½/9 🇺🇸 Alex Yermolinsky (US) 🇮🇸 Jóhann Hjartarson (ISL) Semon Palatnik ||align=center|7½/9 🇳🇱 Loek van Wely (NLD) ||align=center|7½/9 🇷🇺 Alexander Goldin (RUS) ||align=center|7½/9 🇺🇸 Boris Gulko (US) 🇺🇸 Alex Yermolinsky (US) 🇺🇸 Joel Benjamin (US) 🇦🇲 Vladimir Akopian (ARM) 🇪🇪 Jaan Ehlvest (EST) 🇺🇦 Igor Novikov (UKR) 🇺🇦 Georgy Timoshenko (UKR) 🇺🇸 Alexander Shabalov (US) 🇺🇸 Alexander Fishbein (US) ||align=center|7/9 🇪🇪 Jaan Ehlvest (EST) 🇮🇱 Alexander Goldin (ISR) 🇺🇸 Gregory Serper (US) 🇺🇸 Alexander Ivanov (US) 🇺🇸 John Fedorowicz (US) 🇨🇿 Pavel Blatny (CZE) 🇺🇸 Sergey Kudrin (US) ||align=center|7/9 🇮🇱 Ilya Smirin (ISR) 🇺🇦 Alexander Onischuk (UKR) 🇮🇱 Leonid Yudasin (ISR) 🇧🇾 Yuri Shulman (BLR) 🇺🇸 Joel Benjamin (US) 🇺🇸 Alexander Ivanov (US)||align=center|7/9 🇮🇱 Ilya Smirin (ISR) 🇺🇸 Alexander Onischuk (US) 🇩🇪 Artur Yusupov (DEU) 🇪🇪 Jaan Ehlvest (EST) 🇵🇱 Aleksander Wojtkiewicz (POL) 🇺🇸 Benjamin Finegold (US) 🏴󠁧󠁢󠁳󠁣󠁴󠁿 Jonathan Rowson (SCT) 🇺🇸 Varuzhan Akobian (US) ||align=center|7/9 🇮🇱 Ilya Smirin (ISR) 🇺🇸 Alexander Onischuk (US) 🇺🇸 Alexander Shabalov (US) 🇺🇸 Aleksander Wojtkiewicz (US) 🇺🇦 Nazar Firman (UKR) 🇺🇸 Alexander Goldin (US) 🇺🇸 Gennadi Zaichik (US) 🇹🇲 Babakuli Annakov (TKM) 🇮🇱 Leonid Yudasin (ISR) ||align=center|7/9 🇮🇳 Magesh Panchanathan (IND) ||align=center|7½/9 🇨🇭 Vadim Milov (CHE) 🇺🇸 Ildar Ibragimov (US) 🇺🇸 Jaan Ehlvest (US) 🇮🇱 Leonid Yudasin (ISR) 🇺🇸 Alexander Ivanov (US) Giorgi Kacheishvili 🇺🇸 Joel Benjamin (US) 🇺🇸 Aleksander Wojtkiewicz (US) ||align=center|7/9 🇺🇸 Alexander Stripunsky (US) 🇺🇸 Hikaru Nakamura (US) 🇮🇳 Chanda Sandipan (IND) 🇮🇱 Leonid Yudasin (ISR) 🇷🇺 Evgeny Najer (RUS) 🇮🇱 Victor Mikhalevski (ISR) 🇺🇸 Alexander Shabalov (US) 🇺🇸 Julio Becerra (US) ||align=center|7/9 🇮🇳 Parimarjan Negi (IND) 🇸🇰 Ľubomír Ftáčnik (SVK) 🇺🇦 Alexander Moiseenko (UKR) ||align=center|7/9 🇺🇸 Hikaru Nakamura (US) ||align=center|7/9 🏴󠁧󠁢󠁥󠁮󠁧󠁿 Michael Adams (ENG) ||align=center|7/9 🇺🇸 Alexander Shabalov (US) ||align=center|7/9 🇨🇺 Yuniesky Quesada Perez (CUB) 🇨🇺 Lázaro Bruzón (CUB) 🇨🇿 Viktor Láznička (CZE) 🇺🇸 Sergey Erenburg (US) Tamaz Gelashvili 🇮🇳 Parimarjan Negi (IND) 🇺🇸 Alejandro Ramirez (US) 🇺🇸 Yury Shulman (US) 🇺🇸 Conrad Holt (US) ||align=center|6½/9 🇺🇦 Illia Nyzhnyk (UKR) 🇺🇸 Conrad Holt (US)||align=center|7/9 🇦🇿 Rauf Mamedov (AZE) 🇮🇱 Ilya Smirin (ISR) 🇹🇷 Alexander Ipatov (TUR) 🇮🇷 Ehsan Ghaem Maghami (IRN) 🇺🇦 Illia Nyzhnyk (UKR) 🇫🇷 Romain Edouard (FRA) 🇵🇾 Axel Bachmann (PRY)||align=center|7/9 🇲🇩 Viktor Bologan (MDA) Tamaz Gelashvili 🇮🇱 Gil Popilski (ISR) 🇷🇺 Aleksandr Shimanov (RUS) 🇦🇿 Vasif Durarbayli (AZE) 🇺🇦 Illia Nyzhnyk (UKR) ||align=center|7/9 🇺🇸 Jeffery Xiong (US)|| 7½/9 🇮🇳 P. Iniyan (IND)|| 7½/9

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