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

EGTB: win in 4 half-moves

# move score
1 Kc6 win in 3 half-moves
2 Kb6 draw
3 Kd6 draw
4 Kb7 loss in 40 half-moves
5 Kd7 loss in 36 half-moves
6 Kb8 loss in 34 half-moves
7 Kc8 loss in 34 half-moves
8 Kd8 loss in 34 half-moves