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

EGTB: win in 4 half-moves

# move score
1 Kc6 win in 3 half-moves
2 Rc8 win in 3 half-moves
3 Ka8 win in 7 half-moves
4 Kb6 win in 7 half-moves
5 Kb7 win in 7 half-moves
6 Kb8 win in 7 half-moves
7 Ra8 win in 7 half-moves
8 Ka6 draw
9 Kc7 draw
10 Kc8 draw
11 Ke7 draw
12 Ke8 draw
13 Rb8 draw
14 Rh8 draw
15 Kd6 loss in 2 half-moves
16 Ke6 loss in 2 half-moves
17 Re8 loss in 2 half-moves
18 Rf8 loss in 2 half-moves
19 Rg8 loss in 2 half-moves