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 Kc8 win in 7 half-moves
3 Ra8 win in 15 half-moves
4 Kb5 win in 17 half-moves
5 Rc8 win in 17 half-moves
6 Ka7 win in 19 half-moves
7 Ka5 draw
8 Kb6 draw
9 Kb7 draw
10 Ke8 draw
11 Rb1 draw
12 Rb2 draw
13 Rb3 draw
14 Rb7 draw
15 Kd7 loss in 2 half-moves
16 Ke7 loss in 2 half-moves
17 Rb4 loss in 2 half-moves
18 Rb5 loss in 2 half-moves
19 Rb6 loss in 2 half-moves