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 Kb7 win in 3 half-moves
3 Kb8 win in 3 half-moves
4 Kc7 win in 3 half-moves
5 Kd7 win in 3 half-moves
6 Kc5 win in 7 half-moves
7 Kc6 win in 7 half-moves
8 Rb8 win in 7 half-moves
9 Ka5 win in 9 half-moves
10 Ka6 win in 9 half-moves
11 Kb4 win in 9 half-moves
12 Kd8 win in 9 half-moves
13 Ra5 win in 9 half-moves
14 Ka4 win in 11 half-moves
15 Kc4 win in 11 half-moves
16 Ra2 draw
17 Ra1 loss in 2 half-moves
18 Ra3 loss in 2 half-moves
19 Ra4 loss in 2 half-moves
20 Ra6 loss in 2 half-moves
21 Ra7 loss in 2 half-moves