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

EGTB: win in 4 half-moves

# move score
1 Rb2 win in 3 half-moves
2 Kb5 win in 7 half-moves
3 Kc5 win in 7 half-moves
4 Kb2 win in 9 half-moves
5 Kb6 win in 9 half-moves
6 Ra6 win in 11 half-moves
7 Kb7 draw
8 Kc7 draw
9 Kd7 draw
10 Ra1 draw
11 Ra5 draw
12 Ra7 draw
13 Ra8 draw
14 Kb1 loss in 2 half-moves
15 Kb3 loss in 2 half-moves
16 Kc1 loss in 2 half-moves
17 Kc3 loss in 2 half-moves
18 Kd1 loss in 2 half-moves
19 Kd2 loss in 2 half-moves
20 Kd3 loss in 2 half-moves
21 Kd5 loss in 2 half-moves
22 Kd6 loss in 2 half-moves
23 Ra3 loss in 2 half-moves
24 Ra4 loss in 2 half-moves