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

EGTB: win in 4 half-moves

# move score
1 Kf4 win in 3 half-moves
2 Kg4 win in 3 half-moves
3 Kh4 win in 3 half-moves
4 Kf5 loss in 38 half-moves
5 Kf6 loss in 32 half-moves
6 Kg6 loss in 30 half-moves
7 Kh5 loss in 30 half-moves
8 Kh6 loss in 20 half-moves