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

EGTB: win in 4 half-moves

# move score
1 Ra7 win in 3 half-moves
2 Kb7 win in 5 half-moves
3 Ka7 win in 9 half-moves
4 Kd7 win in 9 half-moves
5 Kd8 win in 9 half-moves
6 Ke7 win in 9 half-moves
7 Rb8 win in 11 half-moves
8 Kb6 draw
9 Kf7 draw
10 Kf8 draw
11 Ka5 loss in 2 half-moves
12 Kb5 loss in 2 half-moves
13 Rc8 loss in 2 half-moves
14 Rd8 loss in 2 half-moves