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

EGTB: win in 4 half-moves

# move score
1 Kb7 win in 3 half-moves
2 Kd7 win in 3 half-moves
3 Ka7 win in 5 half-moves
4 Ke7 win in 5 half-moves
5 Kb8 draw
6 Kd8 draw
7 Kf7 draw
8 Kf8 draw