Puzzle 520588:
Puzzle 520588:
Paul Keres - Yuri Averbakh
19th URS-ch Moscow URS, 1951 Paul Keres - Yuri Averbakh
19th URS-ch Moscow URS, 1951
19th URS-ch Moscow URS, 1951 Paul Keres - Yuri Averbakh
19th URS-ch Moscow URS, 1951