History
Origins and early cycles (1948–1965)
The Candidates Tournament emerged from the need to formalize the selection of a challenger for the World Chess Championship. After the death of champion Alexander Alekhine in 1946, FIDE organized a tournament of five elite players in 1948 to determine a new champion. The winner, Mikhail Botvinnik, became world champion and the system was refined: the reigning champion would defend his title in a match every three years, and the challenger would be determined through a series of qualification events. The first official Candidates Tournament was held in 1950 in Budapest, featuring a round-robin of ten players. From 1953 to 1965, the Candidates alternated between round-robin tournaments (e.g., 1953 in Zurich, 1959 in Bled/Zagreb/Belgrade) and matches. The format was not yet fixed; some cycles used a multi-stage knockout among top finishers from interzonal tournaments.
Transition to knockout formats (1965–1993)
In 1965, FIDE introduced a knockout format for the Candidates, where eight players faced off in quarterfinal, semifinal, and final matches. This format persisted for nearly three decades, with minor variations such as the inclusion of a final candidates match to determine the challenger. The matches were played over several months, often in different cities. Notable cycles include the 1972 match between Boris Spassky and Bobby Fischer (which Fischer won, leading to his world championship victory) and the 1984–85 cycle where Anatoly Karpov and Garry Kasparov met in a seemingly endless world championship match, leading to rule changes. The knockout format continued until 1993, when the split between FIDE and the Professional Chess Association (PCA) disrupted the traditional cycle.
Post-Kasparov restructuring (1993–2005)
After Garry Kasparov broke away from FIDE in 1993 to form the PCA, the world championship became fractured. FIDE continued its own Candidates system, while the PCA held separate qualifiers. From 1993 to 2005, FIDE experimented with various formats, including a single-elimination knockout tournament in 1998 (with many participants) and a match-based Candidates in 2002. The cycle was irregular and often chaotic, with champion Viswanathan Anand participating in a 2002 Candidates tournament that he eventually won to challenge the reigning FIDE world champion. The reunification of the world championship in 2006 under FIDE led to a renewed focus on a stable Candidates system.
Modern revival and the 8-player double round-robin (2013–present)
Following the reunification, FIDE established a consistent pattern: the World Chess Championship would be held every two years, with the challenger determined by a Candidates Tournament featuring eight players in a double round-robin format. The first such tournament was the 2013 Candidates in London, which Magnus Carlsen won to become world champion. Since then, the format has remained largely unchanged, though qualification pathways have evolved. The tournament is held in odd-numbered years (previously) or even-numbered years (post-2020), and has become one of the most anticipated events in the chess calendar.
Format
Tournament structure
Round-robin schedule
The Candidates Tournament is a double round-robin event: each of the eight players plays two games against every other participant, one with the white pieces and one with black. This results in 14 rounds for each player, with one rest day after every two rounds. The schedule is pre-determined, typically lasting about three weeks. Players accumulate points (1 for a win, 0.5 for a draw, 0 for a loss), and the player with the most points at the end of the tournament wins.
Tie-breaking procedures (Sonneborn-Berger, playoffs)
Classical tie-breaks
If two or more players finish with the same number of points, tie-breaking is first determined by the Sonneborn-Berger system: the sum of the scores of opponents they have beaten, plus half the sum of the scores of opponents they have drawn with. If still tied, additional criteria include head-to-head results, number of wins, and performance rating. These classical tie-breaks are used to rank players but do not determine the winner; if the first place is tied, a playoff is mandatory.
Rapid and blitz tie-breaks
If the tournament leader(s) are tied for first after all classical tie-breaks, a playoff is held to decide the sole winner. The playoff format is typically a rapid chess match: two games with a time control of 25 minutes plus 10 seconds per move. If still tied, a blitz match of two games (5 minutes plus 3 seconds per move) is played. If still tied, a single “armageddon” game is played where White has 5 minutes, Black has 4 minutes, with a draw counting as a win for Black. This system ensures a decisive result.
Time controls and regulations
The standard time control for each game in the Candidates Tournament is 120 minutes for the first 40 moves, then 60 minutes for the next 20 moves, and then 15 minutes for the rest of the game, with a 30-second increment per move starting from move 61. This is the same time control used in the World Chess Championship match. Players may not agree to a draw before move 30 without the arbiter’s permission (the “Sofia rule” variant), though this rule is sometimes relaxed in later rounds.
Arbitration and anti-cheating measures
Arbiters are present in the playing hall at all times. Players are subject to standard anti-cheating protocols: electronic devices are banned, and players undergo security checks. In recent editions (since 2022), FIDE has employed additional measures, including real-time analysis of engine moves and metal detectors. The playing hall is isolated, and players must remain within a designated area during their games. These measures aim to maintain fairness in an era of powerful chess engines.
Qualification pathways
Direct invites (previous runner-up, rating spots)
Two players receive direct invitations: the runner-up of the previous World Championship match, and the winner of the previous Candidates Tournament (if not already the champion). Additionally, two spots are awarded based on the average FIDE rating over a specified period (usually the six months preceding the qualification deadline). These “rating spots” are given to the highest-rated players who have not already qualified through other events.
Circuit qualification: Chess World Cup
The Chess World Cup, a large knockout tournament held every two years, awards three qualification spots to the Candidates Tournament. The top three finishers (the winner, runner-up, and third-place playoff winner) earn places. The World Cup is open to a broad field and serves as a major pathway for emerging players.
Circuit qualification: FIDE Grand Prix
The FIDE Grand Prix is a series of four events (originally in 2019, later modified) where players accumulate points. The top two finishers in the overall Grand Prix standings qualify for the Candidates. The Grand Prix often features the world’s top players not already qualified through other routes.
Recent qualification criteria changes (2022 onward)
In 2022, FIDE revised the qualification system for the 2024 Candidates. The runner-up spot was changed to the loser of the previous world championship match. The rating spot criteria were adjusted to include a “wild card” from the FIDE Circuit, a newly created series of events. The Grand Prix was replaced by a single FIDE Circuit ranking, which awards one spot. Another spot was given to the winner of the FIDE Grand Swiss, a new tournament. These changes aimed to streamline qualification and reduce the dominance of rating-based invites.
Notable editions
2013 Candidates Tournament (Carlsen’s emergence)
The 2013 Candidates in London marked the beginning of the modern double round-robin era. Magnus Carlsen, then 22, won the tournament with 8.5 points out of 14, a half point ahead of Vladimir Kramnik. Carlsen’s victory earned him the right to challenge world champion Viswanathan Anand, whom he defeated later that year to become world champion. The tournament was notable for Carlsen’s calm, universal style and Kramnik’s strong performance.
2018 Candidates Tournament (Caruana’s undefeated run)
The 2018 Candidates in Berlin saw Fabiano Caruana win with a stellar undefeated performance, scoring 9 out of 14 points—a full point ahead of second-place Shakhriyar Mamedyarov. Caruana’s run included six wins and eight draws, a remarkable feat in such a strong field. He went on to challenge Magnus Carlsen in the 2018 world championship match, where he drew all 12 classical games before losing in rapid tiebreaks.
2020–2021 Candidates Tournament (COVID-19 interruption and resumption)
The 2020 Candidates in Yekaterinburg, Russia, was interrupted after seven rounds due to the COVID-19 pandemic. The tournament was suspended in March 2020 and resumed in April 2021, with the same players and the same scores. Ian Nepomniachtchi, who led at the break, maintained his lead and won by 1.5 points over Maxime Vachier-Lagrave and Anish Giri. The resumption was held with strict health protocols and no spectators. Nepomniachtchi then faced Magnus Carlsen in the 2021 world championship match.
2024 Candidates Tournament (Gukesh’s youngest winner)
The 2024 Candidates in Toronto was historic for several reasons. The winner, 17-year-old D Gukesh of India, became the youngest-ever winner of the Candidates Tournament, surpassing Garry Kasparov’s record from 1984. Gukesh scored 9 out of 14 points, winning on tiebreaks over Hikaru Nakamura and Ian Nepomniachtchi. His victory set up a world championship match against reigning champion Ding Liren later that year. The tournament also featured a strong performance by women’s world champion Ju Wenjun (participating as a rating invite) and several dramatic last-round games.
Statistical records and trivia
Most tournament wins
Garry Kasparov holds the record for most Candidates Tournament victories (as a standalone event), winning in 1984, 1987, 1989, and 1993 (under the PCA). Under the modern double round-robin format (since 2013), no player has won the tournament more than once. However, several players have reached second place multiple times, such as Vladimir Kramnik (2013, 2014) and Hikaru Nakamura (2022, 2024).
Notable upsets and performance ratings
The highest performance rating in a Candidates Tournament was achieved by Bobby Fischer in 1971 (a match-based cycle), with a rating of over 2850. In the modern format, Fabiano Caruana’s 2018 performance rating of 2835 is the highest. Notable upsets include Peter Leko’s victory in the 2002 Candidates (after defeating Garry Kasparov in a match) and the unexpected win of Alexander Khalifman in the 1999 FIDE knockout Candidates.
Longest streaks and decisive games
The longest winning streak in a single Candidates Tournament is six consecutive wins, achieved by Garry Kasparov in 1987 (matches). In the modern round-robin, the longest unbeaten streak is Fabiano Caruana’s 14-game run in 2018 (no losses). The tournament also holds records for decisive games: the 2016 Candidates saw only 15 draws out of 56 games, a decisive rate of 73%, while the 2020–21 edition had a higher draw rate (about 60%).
Legacy and cultural impact
Influence on world championship history
The Candidates Tournament has directly shaped the lineage of world champions. Every world champion since 1950 (with the exception of the 1975 cycle when Fischer forfeited) has emerged from the Candidates. The tournament has produced legendary challengers such as Bobby Fischer, Anatoly Karpov, Garry Kasparov, and Magnus Carlsen. Its winners have often gone on to dominate the championship for years, making the Candidates a crucial stepping stone in chess history.
Chess community and media coverage
The Candidates Tournament is one of the most-watched events in chess, attracting millions of live spectators on platforms like Chess.com, Twitch, and YouTube. Media coverage has increased dramatically since the 2010s, driven by the rise of online streaming and the popularity of players like Carlsen and Nakamura. The tournament’s intensity and high stakes generate extensive analysis, memes, and discussion among fans. The 2024 edition broke viewership records, with over 50 million unique viewers across various platforms. The tournament also serves as a showcase for new talent and a barometer of the current chess elite.