Puzzle 121375:
Puzzle 121375:
Mikhail Botvinnik - B. Lavrentiev
Leningrad-5ch sf Leningrad, 1926 Mikhail Botvinnik - B. Lavrentiev
Leningrad-5ch sf Leningrad, 1926
Leningrad-5ch sf Leningrad, 1926 Mikhail Botvinnik - B. Lavrentiev
Leningrad-5ch sf Leningrad, 1926