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

EGTB: win in 4 half-moves

# move score
1 Kg5 win in 3 half-moves
2 Kg6 loss in 50 half-moves
3 Ke6 loss in 48 half-moves
4 Ke7 loss in 48 half-moves
5 Kf7 loss in 46 half-moves
6 Kg7 loss in 46 half-moves
7 Ke5 loss in 2 half-moves
8 Kf5 loss in 2 half-moves