In the 1965 Candidates he defeated Smyslov by 5½–2½ at Moscow in the first round, but lost to Spassky by 5½–2½ at Riga in the semifinals. In a 1966 Copenhagen playoff match against Bent Larsen, the two players split eight games with two wins each, and Larsen won the first tiebreak game to secure Candidates' exemption in case of a withdrawal by a qualified player in the next cycle. (Eventually, this turned out not to matter, since none withdrew.)