Dubov won two medals at the European Youth Chess Championships: a bronze in 2006, in the U-10 division, and a silver in 2008, in the U12.
2009
In 2009 he won the Young Stars of the World – Vanya Somov Memorial in Kirishi.[2] In the same year he played for the Russian team that won the gold medal in the World Youth Under-16 Chess Olympiad. Dubov also won the individual bronze medal on board two.
Dubov played again in the World Youth Under-16 Chess Olympiad and won the team gold and the individual bronze on board one.[4] Dubov won the Moscow Rapid Chess Championship of 2011.[3]
Dubov was selected as the Organizer's Nominee for the FIDE Grand Prix 2019, a stage in qualification for the World Chess Championship 2020. Dubov was enrolled in the Moscow event, the first of four tournaments for the 2019 Grand Prix cycle. The Moscow tournament was a 16-player event, with Dubov being the lowest ranked participant. After an upset victory[16] over the highest ranked player, Anish Giri, Dubov was eliminated[17] from the Moscow Grand Prix tournament in the quarter-finals by American grandmaster Hikaru Nakamura.
In November, Dubov also competed in the FIDE Grand Prix event in Hamburg. Once again he was the lowest seeded player in the tournament, but after upset wins over Teimour Radjabov and Peter Svidler, he was in the semifinals facing Jan-Krzysztof Duda. The two matches in classical time format were drawn and the match proceeded to tie-breakers. Dubov won the first rapid game (25+10) and needed only a draw to advance to the finals. He then lost what seemed to be a completely drawn endgame in the second match[18] to send the match to a second set of tie breakers (10+10). After drawing with the white pieces, Dubov was finally eliminated by Duda.[19]
2020
Dubov won the Lindores Abbey Rapid Challenge on 3 June, beating Ding Liren in semi-finals and Hikaru Nakamura in the final after the match went to Armageddon time control.[20]
Dubov defeated Magnus Carlsen in the quarter-finals of Airthings Masters with a score of 2½–0½ on 30 December.
Dubov also participated in the 2020 Russian Chess Championship, where he scored 6½/11 as well as fourth place in the event.
2021
On 21 February, Dubov conducted a simultaneous game session at Lighthouse Children's Hospice.[21]
He again served as a second for Magnus Carlsen in the World Chess Championship 2021 against Ian Nepomniachtchi.[22] This was criticized by Sergey Karjakin and Sergei Shipov, saying that he should not have helped a non-Russian in a match against a fellow Russian, with Shipov saying Dubov should not play for Russia in the future. Dubov responded that he considered it to be a match between two individuals, and counter-argued that working with Carlsen would improve his chess and hence help the Russian team.[23]
Through February and March 2022, Dubov played in the FIDE Grand Prix 2022. In the first leg, he tied for second with Vidit Gujrathi in Pool C with a 3/6 result. In the third leg, he finished last in Pool B with a result of 2/6, finishing 21st in the standings with three points.[citation needed]
Dubov, D. vs Svane, R. Batumi, Georgia. 2019. 22nd European Team Championship, round 7: Dubov finds mate in 13, in a game where his opponent's black king moves around the entire board, only to be mated on a3.[28]
Dubov, D. vs Karjakin, S. Moscow, Russia. 2020. Russian Championship Superfinal, round 11: Dubov plays a novelty gambit in the opening then later sacrifices his queen to take down a World Champion contender.[29]
Dubov, D. vs Nepomniachtchi, I. Samarkand, Uzbekistan. 2023. World Blitz Championship, round 11: Dubov and his opponent are penalized for match fixing a draw, playing 1.Nf3 Nf6 2.Nd4 Nd5 3.Nb3 Nb6 4.Nc3 Nc6 5.Ne4 Ne5 6.Ng5 Ng4 7.Nf3 Nf6 8.Ng1 Ng8 9.Nc5 Nc4 10.Na4 Na5 11.Nc3 Nc6 12.Nb1 Nb8 13.Nf3 ½–½. Both players received 0 points for the game rather than 1/2 of a point.[30][31]
Personal life
Dubov learned chess at the age of 6.[32] His grandfather was Eduard Dubov (1938–2018),[33] an international arbiter of chess and a mathematician.[34]