Checkmate puzzles for intermediate players

Checkmate in 7

1.S*2a 2.Kx2a 3.Rx3a+ 4.Sx3a 5.N*1c 6.Lx1c 7.S*1b

1.Sx2c+ 2.Kx2c 3.P*2d 4.K1b 5.G*2c

1.+R1c 2.Kx1c 3.B*3a 4.K1b 5.B2b+

1.S*1c 2.K2a 3.R5a+ 4.Sx5a 5.N3c 6.Gx3c 7.G*2b

1.R1a+ 2.Kx1a 3.N*2c 4.K2a 5.B*1b 6.Rx1b 7.+B3a

1.B3a+ 2.K1b 3.N*2d 4.Px2d 5.+Bx2b 6.Kx2b 7.G*2c 8.K2a 9.R3b+

1.N*2c 2.K2b 3.N3a+ 4.K1c 5.R2b+ 6.Kx2b 7.+B3b 8.K1c 9.N*2e

1.B2c+ 2.Kx2c 3.L*2d 4.K1d 5.+B2e

1.R4b+ 2.Nx3c 3.P*1b 4.K2a 5.N*1c

1.+B1a 2.Kx1a 3.P*1b 4.K2a 5.N*3c