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

EGTB: win in 4 half-moves

# move score
1 Kf6 win in 3 half-moves
2 Kf7 draw
3 Kg6 draw
4 Kh6 draw
5 Kh7 loss in 56 half-moves
6 Kf8 loss in 48 half-moves
7 Kg8 loss in 36 half-moves
8 Kh8 loss in 36 half-moves