Candidates Tournament 2013
The 2013 Candidates Tournament was an eight-player chess double round-robin tournament that took place in the Institution of Engineering and Technology, Savoy Place, London, from 15 March to 1 April 2013.
This was the first time in 51 years that the round-robin format had been used for a Candidates, though it had been used for the 2005 and 2007 world championships.
Participants
The participants were:| Qualification path | Player | Age | Rating | World Ranking |
| The top three finishers in the Chess World Cup 2011 |  Peter Svidler | 36 | 2747 | 14 |
| The top three finishers in the Chess World Cup 2011 | Alexander Grischuk | 29 | 2764 | 10 |
| The top three finishers in the Chess World Cup 2011 |  Vassily Ivanchuk | 43/44 | 2757 | 13 |
| The three highest rated players in the world, excluding any of the above or below |  Magnus Carlsen | 22 | 2872 | 1 |
| The three highest rated players in the world, excluding any of the above or below |  Levon Aronian | 30 | 2809 | 3 |
| The three highest rated players in the world, excluding any of the above or below | Vladimir Kramnik | 37 | 2810 | 2 |
| Candidates Tournament Organizing committee's wild card |  Teimour Radjabov | 26 | 2793 | 4 |
| Loser of the World Chess Championship 2012 |  Boris Gelfand | 44 | 2740 | 18 |
Prize fund
The tournament had a prize fund of €510,000. Prize money was shared between players tied on points; tiebreaks were not used to allocate it. The prizes for each place were as follows:Summary
Before the tournament Carlsen was considered the favourite, with Kramnik and Aronian being deemed his biggest rivals. Ivanchuk was considered an uncertain variable, due to his instability, and the other players were considered less likely to win the event.During the first half of the tournament, Aronian and Carlsen were considered the main contestants for first place. At the halfway point they were tied for first, one-and-a-half points ahead of Kramnik and Svidler. In the second half Kramnik, who had drawn his first seven games, became a serious contender after scoring four wins, while Aronian lost three games, and was thus left behind in the race. Carlsen started the second half by staying ahead of the field, but a loss to Ivanchuk allowed Kramnik to take the lead in round 12 by defeating Aronian. In the penultimate round Carlsen pulled level with Kramnik by defeating Radjabov, while Kramnik drew against Gelfand.
Before the last round only Carlsen and Kramnik could win the tournament; they were equal on 8½ points, 1½ points ahead of Svidler and Aronian. Carlsen had the better tie break, and this would not change if they both scored the same in the final round. Therefore, Kramnik, who had black against Ivanchuk, needed to outperform Carlsen, who had white against Svidler. Carlsen played to win, since that would guarantee him the tournament victory regardless of Kramnik's result; similarly, Kramnik knew that the odds of Carlsen losing with white were minute, and he went all-in against Ivanchuk with the Pirc defense. This backfired and Ivanchuk obtained an early advantage, while Carlsen got a level position against Svidler. Carlsen later got into serious time trouble and did not defend adequately against Svidler's attack, which gave Svidler a winning endgame. Meanwhile, Ivanchuk had outplayed Kramnik, who resigned a few minutes after Carlsen lost. Thus the tournament was won by Carlsen on the second tiebreak. Carlsen's win earned him the right to challenge the reigning world champion, Vishy Anand for the world title.