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 Kd7 loss in 4 half-moves
4 Kc5 loss in 2 half-moves
5 Kd5 loss in 2 half-moves
6 Ke5 loss in 2 half-moves
7 Kc6 loss in 1 half-moves
8 Kc7 loss in 1 half-moves