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

EGTB: win in 4 half-moves

# move score
1 Ke7 win in 3 half-moves
2 Ke8 win in 3 half-moves
3 Kc6 loss in 20 half-moves
4 Kc7 loss in 20 half-moves
5 Kc8 loss in 18 half-moves
6 Kd8 loss in 18 half-moves
7 Kd6 loss in 2 half-moves
8 Ke6 loss in 2 half-moves