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 Kc7 draw
4 Kc8 draw
5 Ka6 loss in 48 half-moves
6 Ka7 loss in 20 half-moves
7 Ka8 loss in 18 half-moves
8 Kb8 loss in 18 half-moves