Semi-republican Chess

Ser-h#7

Semi-republican Chess*

2 sol.

1.f7-f5 2.f5-f4 3.f4-f3 4.f3-f2 5.f2-f1=B 6.Bf1-a6 7.Ba6-b7 Se8-c7[+bKa8] #

1.g7-g5 2.g5-g4 3.g4-g3 4.g3-g2 5.g2-g1=B 6.Bg1-c5 7.Bc5-f8 Se8-f6[+bKe8] #

* Only one side has a King, which can be mated according to the normal rules. If this side, after its move, can put the opposite King on a square where it would be legally mated, then the opposite side is mated.