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

EGTB: win in 4 half-moves

# move score
1 Kab6 win in 3 half-moves
2 Kb5 win in 3 half-moves
3 Rd8 win in 3 half-moves
4 Kb7 win in 5 half-moves
5 Ka6 win in 7 half-moves
6 Rc8 win in 7 half-moves
7 Ka4 draw
8 Kb4 draw
9 Kb8 draw
10 Kc6 draw
11 Kc8 draw
12 Kcb6 draw
13 Kd8 draw
14 Ra7 draw
15 Rb8 draw
16 Rh8 draw
17 Kd6 loss in 2 half-moves
18 Kd7 loss in 2 half-moves
19 Ra6 loss in 2 half-moves
20 Re8 loss in 2 half-moves
21 Rf8 loss in 2 half-moves
22 Rg8 loss in 2 half-moves