Click on the third or sixth rank to set the en passant target square.

EGTB: win in 4 half-moves

# move score
1 Nh7 win in 3 half-moves
2 Kc6 loss in 10 half-moves
3 Kc7 loss in 10 half-moves
4 Kd8 loss in 8 half-moves
5 Ke8 loss in 6 half-moves
6 Kc8 loss in 4 half-moves
7 Kd6 loss in 2 half-moves
8 Ke6 loss in 2 half-moves
9 Ke7 loss in 2 half-moves
10 Ne6 loss in 2 half-moves
11 Ng6 loss in 2 half-moves