Only the top five were supposed to have qualified for a 12-player Candidates Tournament, but four players were tied for fifth place, and since the Sonneborn-Berger tie-break margins were so small, all four were included.

[1] Originally, the 1952 Interzonal was supposed to have featured 22 players, but Julio Bolbochán of Argentina suffered a hemorrhage and had to withdraw after a first-round adjournment.

Most sensationally, writing in the early 2000s, David Bronstein alleged that certain players were pressured to ensure Smyslov would win ahead of Reshevsky.

[2] He also alleged that he (Bronstein) was pressured to make a draw with white against Smyslov in round 26, and he complied by playing the unaggressive Ruy Lopez exchange variation.

[3] Soon after the article emerged, Smyslov replied, criticising the allegations, though Andy Soltis read that as meaning he didn't deny them.