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

EGTB: win in 4 half-moves

# move score
1 Kc7 win in 3 half-moves
2 Kd7 win in 3 half-moves
3 Rb7 win in 3 half-moves
4 Kb6 win in 7 half-moves
5 Kc8 win in 11 half-moves
6 Ke7 draw
7 Ke8 draw
8 Rb6 draw
9 Ka4 loss in 2 half-moves
10 Ka5 loss in 2 half-moves
11 Ka6 loss in 2 half-moves
12 Kb4 loss in 2 half-moves
13 Kc4 loss in 2 half-moves
14 Kc5 loss in 2 half-moves
15 Kc6 loss in 2 half-moves
16 Ra8 loss in 2 half-moves
17 Rc8 loss in 2 half-moves