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Minev — Portisch Halle, 1967.
BLACK TO MOVE
Pawn promotion, combination strength: 7.
Solution: https://chessp.com/en/game/434

Kogan — Spassky, Winnipeg, 1967.
BLACK TO MOVE
Double attack, Combination strength: 5.
Solution: https://chessp.com/en/game/146

Pirc — Byrne, Helsinki, 1952. Ol.
BLACK TO MOVE
Double attack, Combination strength: 3.
Solution: https://chessp.com/en/game/168

Bacrot — Lysyj, Moscow 2009.
WHITE TO MOVE
Problems in cooperation, Combination strength:6.
Solution: https://chessp.com/en/game/2184

Li Bo - Zubov, Zalakaros 2017.
WHITE TO MOVE
Double attack, combination strength: 5.
Solution: https://chessp.com/en/game/2541

Kotov — Smyslov, Budapest, 1950.
BLACK TO MOVE
Double attack, Combination strength: 6.
Solution: https://chessp.com/en/game/872

Chaenkov — Aravin, USSR, corr, 1966.
WHITE TO MOVE
Defensive pieces in the king position, Combination strength: 5.
Solution: https://chessp.com/en/game/1296

Georgadze — Kupreichik, Minsk, 1987.
WHITE TO MOVE
Double attack, Combination strength: 4.
Solution: https://chessp.com/en/game/98

Yedin — Tukmakov, Moscow, 1979.
BLACK TO MOVE
Problems in cooperation, Combination strength: 4.
Solution: https://chessp.com/en/game/599

Matanovic — Sokolov,V. Yugoslavia, 1953.
WHITE TO MOVE
Double attack. Combination strength: 4.
Solution: https://chessp.com/en/game/137