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