Solution
1.P*1b 2.Kx1b 3.S*2a 4.K1c 5.G*1d
1.P*1b 2.Kx1b 3.S*2a 4.K1c 5.G*1d
1.N*2c 2.Gx2c 3.G*3b
1.Rx2a+ 2.Kx2a 3.G*2b
1.B2b+ 2.Gx2b 3.S2d+
1.Rx1b+ 2.Kx1b 3.G*2c 4.K1a 5.L*1b
1.S*2a 2.Kx2a 3.S*3b 4.K1b 5.S*2a
1.K1h 2.+Px4h 3.P*4c. Black wins
1.+P7c and 1.G4c aren’t mate threats, so white will reply with 2.+Px4h threatening mate and white wins. Black needs 2 moves to threaten mate. 1. K3i to prevent +Px4h doesn’t work because of 2.R9i+ 3.K2h 4.+R5i.
1.+P4b 2.G5b-6b 3.+P5a 4.G7a 5.+P5b
1.R1h
Black threatens L1b+ G3b R1c+
1.Bx2a+ 2.Kx2a 3.N*3c 4.K3b 5.B*2a