1.1.Nf7+ Kh7 2.Qxe4+ f5 3.Qxf5+ g6 4.Ng5+ Kh8 5.Rh7#

2.1.Bxe6+ Rff7 2.Bxf7+ Rxf7 3.Re8+ Bf8 4.Rxf8+ Rxf8 5.Qh7#

3.1.Qe7+ Kg8 2.Qe8+ Kg7 3.e6+ Qd4 4.Bxd4+ Kh7 5.Qxh8#

4.1.Bh5+ g6 (1...Ke7 2.Qa3#) 2.Qxg6+ (or 2.Bxg6+) hxg6 3.Bxg6+ Ke7 4.Bg5+ Nf6 5.Bxf6#

5.1.Ne7+ Kg7 (1...Bxe7 2.Qxh7+ Kf8 3.Qh8#) 2.Qxh7+ Kf6 3.Ng8+ Kg5 4.h4+ Kg4 5.Nf6#

6.1.Qe5+ Kc5 2.Na4+ Kc4 (2...Kb5 3.Qe2+ Kxa4 4.Bc2#) 3.Qc3+ Kb5 4.Bd3+ Kxa4 5.Qc2#

7.1.Qxg7+ Rxg7 2.Rxh6+ Kg8 3.Ne7+ Kf8 4.Rh8+ Rg8 5.Rxg8#

8.1.Bb5+ Kd8 2.Qf8+ Kc7 3.Qc5+ Kd8 4.Qd6+ Bd7 5.Qxd7#

9.1.h3+ Kf3 2.Qh5+ g4 3.Qxg4+ fxg4 4.Rf7+ Qf5 5.Rxf5#

10.1.Ra8+! Bxa8 (1...Kxa8 2.Qa1+ leads to a quicker mate) 2.Qa1 Kb7 3.Qa7+ Kc6 4.Qa6 and Black can't stop both 5.Bxb5# and 5.b7#.

11.1.Rg8+ Kf6 (1...Kh7 2.Qxf7+ Kh6 3.Rh6#; 1...Kh6 2.Qxf7 and with mutual threats of 3.Rh8# and 3.Qxg6#, Black must play Qc1+ 3.Kh2 Qh1+ 4.Kxh1 followed by 5.Qxg6#) 2.Qc6+ Ke5 3.f4+ Kd4 4.Qc4+ Ke3 5.Qd3#

12.1.Rxg5+ hxg5 (1...Qxg5 2.hxg5 Kf7 {2...Rf7 3.Qh8#; 2...Rxf5 3.Qg7#} 3.Qxd7+ Kg8 4.Qg7#; 1...Kf7 2.Bg6+ Kg8 {2...Ke6 3.Qe5#} 3.Qh8#) 2.Qh8+ Kf7 3.Qh5+ Kg8 4.Qg6+ Qg7 5.Qxg7#