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

EGTB: win in 4 half-moves

# move score
1 Kb8 win in 3 half-moves
2 Kc7 win in 3 half-moves
3 Kd7 win in 3 half-moves
4 Kd8 win in 3 half-moves
5 Ra7 win in 3 half-moves
6 Rb8 win in 3 half-moves
7 Kf7 win in 7 half-moves
8 Kf8 win in 7 half-moves
9 Kb7 draw
10 Kf6 draw
11 Kg6 draw
12 Kg8 draw
13 Kh6 draw
14 Kh7 draw
15 Kh8 draw
16 Ra4 draw
17 Ra5 draw
18 Ra6 draw
19 Ra1 loss in 2 half-moves
20 Ra2 loss in 2 half-moves
21 Ra3 loss in 2 half-moves