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

EGTB: win in 4 half-moves

# move score
1 Kab7 win in 3 half-moves
2 Kb6 win in 3 half-moves
3 Rb8 win in 3 half-moves
4 Kc7 win in 7 half-moves
5 Ra7 win in 13 half-moves
6 Ka7 win in 17 half-moves
7 Kb5 win in 21 half-moves
8 Ka5 draw
9 Kb8 draw
10 Kcb7 draw
11 Kd7 draw
12 Kd8 draw