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

EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Kb7 win in 7 half-moves
3 Kc6 win in 7 half-moves
4 Na7 win in 7 half-moves
5 Ne7 win in 7 half-moves
6 Nb6 win in 11 half-moves
7 Kb8 draw
8 Kd8 draw
9 Kd6 loss in 2 half-moves
10 Kd7 loss in 2 half-moves
11 Nd6 loss in 2 half-moves