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

EGTB: win in 6 half-moves

# move score
1 Kba7 win in 5 half-moves
2 Kc7 win in 5 half-moves
3 Ka5 win in 7 half-moves
4 Kb5 win in 7 half-moves
5 Kc8 win in 11 half-moves
6 Ra7 win in 13 half-moves
7 Kaa7 draw
8 Kbb7 draw
9 Kab7 loss in 2 half-moves
10 Kb6 loss in 2 half-moves