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 Ka4 draw
3 Ka5 draw
4 Kc4 draw
5 Kc6 draw
6 Nb4 draw
7 Nb8 draw
8 Nc5 draw
9 Nc7 draw
10 Kb4 loss in 1 half-moves
11 Kc5 loss in 1 half-moves