Input (grade 12): Botvinnik, who had never faced Tal before the title match began, won the return match against Tal in 1961, also held in Moscow, by 13 â "8 (ten wins to five, with six draws).
Output (grade 9): Botvinnik, who had never faced Tal before, won the return match against Tal in 1961 by 13 â "8 (ten wins to five, with six draws).