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

EGTB: win in 2 half-moves

# move score
1 Kc5 win in 1 half-moves
2 Kc6 win in 1 half-moves
3 Kc7 win in 1 half-moves
4 Kb7 loss in 18 half-moves
5 Ka5 loss in 10 half-moves
6 Ka6 loss in 8 half-moves
7 Ka7 loss in 6 half-moves
8 Kb5 loss in 2 half-moves