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

EGTB: win in 4 half-moves

# move score
1 Ke6 win in 3 half-moves
2 Ke7 win in 3 half-moves
3 Kc6 loss in 8 half-moves
4 Kc7 loss in 8 half-moves
5 Kd7 loss in 6 half-moves
6 Kc5 loss in 2 half-moves
7 Kd5 loss in 2 half-moves
8 Ke5 loss in 2 half-moves