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

EGTB: win in 6 half-moves

# move score
1 Kb7 win in 5 half-moves
2 Ka7 win in 7 half-moves
3 Kab6 win in 7 half-moves
4 Kc6 win in 7 half-moves
5 Kbb6 win in 9 half-moves
6 Kaa5 win in 11 half-moves
7 Kb4 win in 13 half-moves
8 Kba5 win in 13 half-moves
9 Ka4 win in 15 half-moves
10 Kc4 loss in 2 half-moves
11 Kc5 loss in 2 half-moves