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

EGTB: win in 4 half-moves

# move score
1 Kf6 win in 3 half-moves
2 Ke5 draw
3 Ke7 draw
4 Kf5 draw
5 Kf7 draw
6 Nb6 draw
7 Nd6 draw
8 Ne7 draw
9 Kd5 loss in 20 half-moves
10 Kd6 loss in 20 half-moves
11 Kd7 loss in 20 half-moves
12 Na7 loss in 20 half-moves