To test the strength of Soviet chess masters, Krylenko organized the Moscow 1925 chess tournament. On a rest day during the event, world champion José Raúl Capablanca gave a simultaneous exhibition in Leningrad. Botvinnik was selected as one of his opponents, and won his game. In 1926, he reached the final stage of the Leningrad championship. Later that year, he was selected for Leningrad's team in a match against Stockholm, held in Sweden, and scored +1=1 against the future grandmaster Gösta Stoltz. On his return, he entertained his schoolmates with a vivid account of the rough sea journey back to Russia. Botvinnik was commissioned to annotate two games from the match, and the fact that his analyses were to be published made him aware of the need for objectivity. In December 1926, he became a candidate member of his school's Komsomol branch. Around this time his mother became concerned about his poor physique, and as a result he started a programme of daily exercise, which he maintained for most of his life.