Puzzle 520588: White to defend
Puzzle 520588: White to defend
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