Patrol chess problems 1

1.Qc8-g8 ! threat: 2.Re6-e8 #
1...Qd2-h6 2.Qg8-g5 #
1...Qd2-g5 2.Sg2-f4 #
1...Qd2-f4 2.Sg2-e3 #

3 variations show weakness of black queen separated from her bishop. (Rather real situation from medieval Europe?)

a) 1.Bd1*b3 ! zugzwang.
1...Kb1-c2 2.0-0-0 #
1...Kb1-a2 2.0-0 #

b) 1.0-0 ! threat: 2.Bd1-c2 #
1...Kb1-a2 2.Bd1*b3 #

The power of castlings. (Another real thing...)

1.Kb2-c3 ! threat: 2.Bc1-b2 #
1...Qf7*e6 + 2.Se7-d5 #
1...Qf7-f1 + 2.Rd2-d3 #
1...Qf7-f4 + 2.Sg3-e4 #
1...Bh7-d3 + 2.Rd2*d3 #

White exposures his king to four checks - but in patrol chess I consider this key to be strong as it greatly increases pressure on the black king.