1971-1973
618 - Nikita Plaksin 1st/2nd Prize Die Schwalbe 1971
15+14. Mate in 3
619 - André Hazebrouck Special Prize Die Schwalbe Them. Tourney 1972
13+13. Who mates in 5?
620 - Josef Haas 1st Prize Problem Them. Tourney 1972
14+8. White retracts and mates in 2