Christian Poisson (France)
 
#4 3+1

1…Ka5
a 2.Kc5 A Ka6 3.Re7 Ka5 4.Ra7‡
1…Ka6 b 2.Kc6 B Ka5 3.Re4 Ka6 4.Ra4‡
    2…Ka7 3.Re8 Ka6 4.Ra8‡
1.Rb2+!
1…Ka5 a 2.Kc6 B Ka4 3.Kc5 Ka3,Ka5 4.Ra2‡
1…Ka6 b 2.Kc5 A Ka7 3.Bd5 Ka6 4.Ra2‡
1…Ka7 2.Kc6 Ka8 3.Kc7 Ka7 4.Ra2
#
1…Kc7 2.Be6 Kd8 3.Kd6 Ke8 4.Rb8#       (Author)