Puzzle 67026:
Puzzle 67026:
Peter Dubinin - Alexander Kotov
11th URS-ch Leningrad URS (16), 1939 Peter Dubinin - Alexander Kotov
11th URS-ch Leningrad URS (16), 1939
11th URS-ch Leningrad URS (16), 1939 Peter Dubinin - Alexander Kotov
11th URS-ch Leningrad URS (16), 1939