One line can go like this: 1….. …Kd5 2. Kxa5 Ke4 3. Kb6 Kxd3 4. a5 Nd6 5. a6 Nc8 7. Kb7 Nd6+ 8. Kc6 Nc8 9. Ke4 Winning, since the Black Knight is tied to protect against the White a Pawn. The White King will pick the only Black pawn left and the Black King is too far from obsrtucting White’s Bishop Pawn from queening.
1. f4. Limiting the scope of Black’ pieces.
One line can go like this:
1….. …Kd5
2. Kxa5 Ke4
3. Kb6 Kxd3
4. a5 Nd6
5. a6 Nc8
7. Kb7 Nd6+
8. Kc6 Nc8
9. Ke4 Winning, since the Black Knight is tied to protect against the White a Pawn. The White King will pick the only Black pawn left and the Black King is too far from obsrtucting White’s Bishop Pawn from queening.