Solution
1.G*3b 2.Kx3b 3.R4b+
1.G*3b 2.Kx3b 3.R4b+
1.Sx1d+ 2.Kx1d 3.L*1e
P2b
White can’t take the Rook on 1a because of the Bishop on 3a.
K7h
K5i
1.G1a 2.Kx1a 3.+B2a
1.+B4a 2.K2b 3.+Bx2c 4.Kx2c 5.P*2d 6.K3b 7.G*2c
1.N2e
white can take the Rook on 1a.