[Retros] Pawn to-the-6th rank mates

[Nicolas.Dupont at math.univ-lille1.fr]

> Category II:
> b6#/...b3# etc., discovered checkmate
>
> No games for now?

Here is one :

1.Pf2-f4   Pd7-d5   2.Pf4-f5   Pd5-d4   3.Pf5-f6   Fc8-g4
4.Pf6xe7   Fg4xe2   5.Pe7xd8=F Ff8-c5   6.Fd8-h4   Fc5-b6
7.Fh4-g3   Re8-e7   8.Re1-f2   Re7-f6   9.Dd1-e1   Pd4-d3