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

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

> 1.g3 h5 2.Bg2 h4 3.Bxb7 Bxb7 4.Nf3 Bxf3 5.Kf1 Bxe2+ 6.Kg2
> Rh5 7.Qg1 h3# (Hirokaz Onoda)

The same idea works for the opposite side :

1.Ph2-h4   Pg7-g6   2.Ph4-h5   Ff8-g7   3.Th1-h4   Fg7xb2
4.Fc1xb2   Cg8-f6   5.Fb2xf6   Re8-f8   6.Ff6xe7   Rf8-g7
7.Cg1-h3   Dd8-g8   8.Ph5-h6