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

EGTB: win in 4 half-moves

# move score
1 Kb5 win in 3 half-moves
2 Kb6 win in 3 half-moves
3 Kb7 win in 3 half-moves
4 Kc5 win in 3 half-moves
5 Kc7 win in 3 half-moves
6 Kd5 win in 3 half-moves
7 Nb7 win in 3 half-moves
8 Nc8 win in 3 half-moves
9 Kd7 win in 5 half-moves
10 Nb5 loss in 2 half-moves
11 Nc4 loss in 2 half-moves
12 Ne4 loss in 2 half-moves
13 Ne8 loss in 2 half-moves
14 Nf5 loss in 2 half-moves
15 Nf7 loss in 2 half-moves