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 Kd7 win in 5 half-moves
3 Kd5 loss in 52 half-moves
4 Kc5 loss in 50 half-moves
5 Kc6 loss in 48 half-moves
6 Kc7 loss in 46 half-moves
7 Ke5 loss in 2 half-moves
8 Ke6 loss in 2 half-moves