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

EGTB: win in 2 half-moves

# move score
1 Rb8 win in 1 half-moves
2 Rc8 draw
3 Rd8 draw
4 Kd8 loss in 8 half-moves
5 Ra1 loss in 4 half-moves
6 Ra2 loss in 4 half-moves
7 Kd7 loss in 2 half-moves
8 Ke7 loss in 2 half-moves
9 Kf7 loss in 2 half-moves
10 Kf8 loss in 2 half-moves
11 Ra4 loss in 2 half-moves
12 Ra5 loss in 2 half-moves
13 Ra6 loss in 2 half-moves
14 Ra7 loss in 2 half-moves
15 Ra3 loss in 1 half-moves