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

EGTB: win in 4 half-moves

# move score
1 Rb1 win in 3 half-moves
2 Kb2 win in 5 half-moves
3 Kc2 win in 5 half-moves
4 Kd1 win in 15 half-moves
5 Kb4 win in 17 half-moves
6 Kb5 win in 19 half-moves
7 Kb1 draw
8 Kb6 draw
9 Kc4 draw
10 Kc6 draw
11 Ra2 draw
12 Ra3 draw
13 Ra5 draw
14 Ra7 draw
15 Ra8 draw
16 Kd2 loss in 2 half-moves
17 Kd4 loss in 2 half-moves
18 Kd5 loss in 2 half-moves
19 Kd6 loss in 2 half-moves
20 Ra4 loss in 2 half-moves
21 Ra6 loss in 2 half-moves