Christian Poisson (France)
 
#7 3+1

1.e8=R!
Kd7 2.Nf6+ Kc6 3.Re6+ Kb7 4.Kb5 Ka7 5.Re7+ Kb8,Ra8 6.Kb6 Ka8,Kb8,Kc8 7.Re8
#
4…Kc7 5.Ka6 Kd8,Kc8 6.Kb6 Kc8,Kb8,Kd8 7.Re8# (Author)