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

EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Kb8 win in 3 half-moves
3 Kc6 win in 3 half-moves
4 Kc7 win in 3 half-moves
5 Ra4 win in 3 half-moves
6 Kb7 win in 5 half-moves
7 Kc5 win in 7 half-moves
8 Ra8 win in 7 half-moves
9 Kb4 win in 11 half-moves
10 Ra1 win in 11 half-moves
11 Ra3 win in 11 half-moves
12 Ka4 draw
13 Ka6 draw
14 Kc4 draw
15 Ra2 draw
16 Kd7 loss in 2 half-moves
17 Kd8 loss in 2 half-moves
18 Ra6 loss in 2 half-moves
19 Ra7 loss in 2 half-moves