1971-1973
618 - Nikita Plaksin
1st/2nd Prize Die Schwalbe 1971
![[1b1K3n/2pppprp/1p4p1/1p6/b1P2B2/RP2P1R1/r1PPQPPP/NB5k]](E618.gif)
15+14. Mate in 3
619 - André Hazebrouck
Special Prize Die Schwalbe Them. Tourney 1972
![[r3k2r/b3p2n/1Pp1p1P1/2BpQ1N1/2b1q3/1pP1P1p1/B3P2N/R3K2R]](E619.gif)
13+13. Who mates in 5?
620 - Josef Haas
1st Prize Problem Them. Tourney 1972
![[r3k3/2p1pRp1/P3P1K1/1r4p1/Bp6/4P1P1/N2PP2P/1R2BN2]](E620.gif)
14+8. White retracts and mates in 2