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

EGTB: win in 2 half-moves

# move score
1 Kb7 win in 1 half-moves
2 Kc7 win in 1 half-moves
3 Kd7 win in 1 half-moves
4 Kb6 loss in 50 half-moves
5 Kd6 loss in 50 half-moves
6 Kb5 loss in 48 half-moves
7 Kc5 loss in 48 half-moves
8 Kd5 loss in 48 half-moves