Puzzle 300206:
Puzzle 300206:
Lev Polugaevsky (2645) - Aivars Gipslis (2530)
13th Soviet TCh final A Riga URS (5), 1975 Polugaevsky - Gipslis, Riga 1975
13th Soviet TCh final A Riga URS (5), 1975 Polugaevsky - Gipslis, Riga 1975