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

EGTB: win in 4 half-moves

# move score
1 Kb5 win in 3 half-moves
2 Kc5 win in 3 half-moves
3 Ra5 win in 3 half-moves
4 Ra7 win in 3 half-moves
5 Rb6 win in 3 half-moves
6 Kb1 win in 5 half-moves
7 Kb2 win in 5 half-moves
8 Kb6 win in 5 half-moves
9 Kc2 win in 5 half-moves
10 Kb7 draw
11 Kc7 draw
12 Kd1 draw
13 Kd2 draw
14 Kd6 draw
15 Kd7 draw
16 Ra1 draw
17 Ra4 draw
18 Ra8 draw
19 Kd5 loss in 2 half-moves
20 Ra2 loss in 2 half-moves
21 Ra3 loss in 2 half-moves