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

EGTB: win in 4 half-moves

# move score
1 Kb4 win in 3 half-moves
2 Ka4 draw
3 Ka5 draw
4 Kc4 draw
5 Kc5 draw
6 Nc5 draw
7 Nc7 draw
8 Nb4 loss in 16 half-moves
9 Kc6 loss in 12 half-moves
10 Nb8 loss in 12 half-moves
11 Kb6 loss in 8 half-moves