Ambitieuses sentinelles

Ser-h#7

Sentinelles*
No White King

1.Kf4-g4[+bPf4] 2.f4-f3 3.f3-f2 4.f2-f1=Q 5.Qf1-f4 6.Qf4-g5[+bPf4] 7.Qg5*h4[+bPg5] Bg2-f3[+wPg2] #

* When a piece (not a Pawn) moves, a Pawn of the same colour appears on the vacated square, if it is not the first or the last rank, and if there are less than 8 Pawns of that colour on the board.