Section A1 – Win
1.d7+!
( 1.c6 Rh1+ 2.Kg4 Ne5+ 3.Kf5 Ng3+ 4.Kf6 Nh5+ 5.Kf5 Ng3+ 6.Rxg3 Nxc6 =, quiet )
1…Kd8 2.Bb6+!
( 2.c6?? Rh1+ 3.Kg4 Ne5+ 4.Kf5 Nxc6 )
2…Nxb6
[#]
3.c6! Nf4+
( 3…Rh1+ 4.Kg4 Nf6+ 5.Kf5 Nxg8 6.c7+ Ke7 7.d8=Q+ Kf7 8.Nd6+ Kg7 9.Nd7 Ne7+ 10.Kg4 Nxd7 11.Nf5+! Kf7 12.Qxd7 f2 13.c8=Q +- )
4.Kg4
( 4.Kh4? Rh2+ 5.Kg4 Rg1+ 6.Kf5 Rh5+! 7.Ke4 Re1+ 8.Kxf4 Nd5+ 9.Kxf3 Rf5+ 10.Kg2 Re2+ 11.Kg1 Re1+ =, quiet )
4…Rg1+ 5.Kf5!
( 5.Kxf4?? Nd5+ )
5…Ke7
[#]
( 5…Re5+ 6.Kxf4! Nd5+ 7.Kxe5 +- )
6.c7!
( 6.Rxg1 Nxd7 )
6…Ne6 7.Rxg1
( Thematic try : 7.c8=N+? 3rd knight 7…Nxc8 8.dxc8=N+ another knight 8…Kf7! )
7…f2
[#]
8.Nxe6
( 8.c8=Q Nxc8 and thematic 9.dxc8=N+ is not good enough 9…Kxf8 )
( 8.Rd1 f1=Q+! 9.Rxf1 Nxc7 10.Nd4 Nxd7 11.Nxe2 Nxf8 =, quiet )
( 8.c8=N+? is again too early )
8…Re5+!
( Thematic line: 8…Kxd7 9.Rd1+ Ke7 10.Nbd4! Re1 11.Nc6+ Kf7 12.Ne5+! Ke7 13.c8=N+! +- third knight!
( 13.c8=Q?? f1=Q+ )
)
9.Kxe5 Nxd7+ 10.Kf5! fxg1=Q
[#]
11.c8=N+!
Third knight!
( 11.c8=Q? is perpetual check )
11…Kf7 12.Nbd6+ Kg8 13.Ne7+ Kh8 14.Nf7# 1-0