How to win material

Solution
1.P*4c

How to win material
1.P*4c
1.S2e 2.Px2e 3.P*1e 4.K2d 5.G3d
1.R2b+
1.S*3a 2.K1c 3.S*2b 4.K1b 5.Sx1a+ 6.Kx1a 7.L*1c 8.K2a 9.L1b+ 10.Kx1b 11.R3b+ 12.K1c 13.+R2b
1.S*1b 2.Lx1b 3.P*2b 4.K1a 5.R3a+
1.R2a+
How can you promote the Pawn on the 7d?
1.P*6c 2.Sx6c 3.P7c+
After 1.P*6c, no matter where the 6b-Silver goes, you can promote the pawn on 7d .
How to win material
1.P*1b 2.Lx1b 3.P*1c
1.R3a+
1.Bx1c+ 2.Kx1c 3.L*1d