Nice twist on the N mate of the K motif btw. Most examples usually have the K being mated in front of his advancing rook pawn. Move order is important, but Na6 is pretty obvious as it accomplishes both the goal of fixing the a pawn in place, stopping the creation of a flight square for the K, and hits b8 cutting off any escape for the K. After Na6 it is lights out. Black can move the b or g pawn, but he is still getting mated.
Na6 wins… followed by Kxc7..Kc8.. and Nc7 mate
1.Na6 g3 2.K:c7 g2 3.Kc8 g1=Q 4.Nc7#
Nice twist on the N mate of the K motif btw. Most examples usually have the K being mated in front of his advancing rook pawn. Move order is important, but Na6 is pretty obvious as it accomplishes both the goal of fixing the a pawn in place, stopping the creation of a flight square for the K, and hits b8 cutting off any escape for the K. After Na6 it is lights out. Black can move the b or g pawn, but he is still getting mated.
1.Na6 (blocus) g3 (or 1. …b5) 2.Kxc7 g2 (or 2. …b4) 3.Kc8 g1=Q or R, B, N (or 3. …b3) 4.Nc7#
1.Na6
2.Kxc7
3.Kc8
4.Nc7#
Black has no way to interfere with White’s plan.
Na6
Kc7-8
Nc7
2seconds so it must be easy
first Na6 (blocking a pawn and controlling b8 square) then Kc7, Kc8, Nc7 mate. The g pawn comes too late
1.Na6(necessary to restrict Black K)
…g3 2.Kxc7 g2 3.Kc8 g1=Q 4.Nc7 mate
1. Na6 g3
2. Kxc7 g2
3. Kc8 g1Q
4. Nc7#
trivially easy. Na6 to block a-pawn and trap king, then Kc7, Kc8 and Nc7