1.1...Qxg2+ 2.Ke3 Nd5+ 3.Kd3 Rxf3+ (or 3...Nb4+ with mate next move) 4.Re3 Rxe3#

2.1...Kc3 2.Ka2 Nd2 3.Ka3 b1=Q 4.Ka4 Qb4#

3.1...Qxf2+ 2.Rxf2 Re1+ 3.Rf1 Bh2+ 4.Kh1 Rxf1#

4.1...Qxd5 2.Bxd5 Bxd5 3.Qe4 Bxe4 and 4...Rh1#

5.1...Rxf2+ 2.Ke3 Bc5+ 3.Kxe4 Bf5+ (or 3...Rf4+ 4.Kxe5 Bd6#) 4.Kxe5 Nd7#

6.1...Bxe6+ 2.Kg5 Rf5+ 3.Kg4 h5+ 4.Kh3 Rf3#

7.1...Bg3+ 2.Rxg3 (2.Kf6 Qh4#; 2.Ke4 Qxg4+ 3.Ke3 {3.Kd3 Qd4#} Qf4+ 4.Kd3 Qd4#) Qxg3+ 3.Ke4 (3.Kf6 Qf4+ 4.Qf5 Qxf5#) Qf4+ 4.Kd3 Qd4#

8.1...Qf3+!! 2.Rxf3 Rb1+ 3.Rd1 Qxd1+ 4.Rf1 Rxf1#

9.1...Nxb4+! 2.Qxb4 (2.Nxb4 dxe4+ 3.Kxe4 Qe2+ 4.Qe3 Qe3# has the same effect.) dxe4+ 3.Kxe4 Qxe2+ 4.Ne3 Qxe3#