1.Kf3!

Tries :

a) 1.Ke3? Nxf6 2.Nxf6+ Kxh4 3.Nf5+ Kh3=

b) 1.Nf5? Kg6 2.Nxd6 Nxd6 3.Ng5 Kxf6=

c) 1.Nc8? Bb4 2.f7 Kg6=

1...Nd2+

main 1...Nxf6 2.Nxf6+ Kxh4 3.Ng6+! (Try in this line : 3.Nf5+? Kh3 4.Ng4 Bc7=) 3...Kh3 (3...Kg5 4.Ne4++-) 4.Ng4 Bxh2 (4...Bb4 5.Nf4+ Kh4 6.Nf2+-) 5.Nf2#

2.Ke3! Nf1+ 3.Ke4 Nxh2 4.Nf5 Ng4 5.f7!

5.Nxd6? Nxf6+ 6.Nxf6+ Kxh4=

5...Ba3 6.Kf4!

6.f8Q? Bxf8 7.Nxf8 Nh6! 8.Nxh6 (8.Ng6 Kxg6=) 8...Kxh4=; or 6.Ng5? Kg6=

6...Nf2 7.f8Q!

7.Ne3? Kxh4!=; 7.Ke5? Nd3+=

7...Bxf8 8.Nxf8 Nh3+ 9.Kg3!+-

Try : 9.Ke4? Ng5+ 10.Kf4 Nf3 11.Kxf3 stalemate