
Solution
S*3a

S*3a threatens G*2b
S*3a
S*3a threatens G*2b
P*2c
P*2c threatens G*2b
R3b+
R3b+ threatens S*1b
R2b
White can’t play G2a because the Bishop on 1c attacks 3a-square.
White can’t play S2a because the Lance on 3d attacks 3a-square.
White can’t play Px2d because of the Bishop on 3d
S7g
N6g
G7h