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

EGTB: win in 2 half-moves

# move score
1 Ka7 win in 1 half-moves
2 Kc7 win in 1 half-moves
3 Kb6 loss in 50 half-moves
4 Kc6 loss in 50 half-moves
5 Ka6 loss in 48 half-moves
6 Kb8 loss in 46 half-moves
7 Kc8 loss in 46 half-moves
8 Ka8 loss in 44 half-moves