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

EGTB: win in 4 half-moves

# move score
1 Kc8 win in 3 half-moves
2 Kdc6 win in 3 half-moves
3 Rb8 win in 3 half-moves
4 Kd6 draw
5 Kd8 draw
6 Kdc7 draw
7 Ke7 draw
8 Ke8 draw
9 Ka5 loss in 2 half-moves
10 Ka6 loss in 2 half-moves
11 Ka7 loss in 2 half-moves
12 Kb5 loss in 2 half-moves
13 Kbc6 loss in 2 half-moves
14 Kbc7 loss in 2 half-moves
15 Kc5 loss in 2 half-moves
16 Ke6 loss in 2 half-moves
17 Ra7 loss in 2 half-moves
18 Rc7 loss in 2 half-moves