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 Kd8 draw
4 Ke7 draw
5 Kf8 draw
6 Ra2 draw
7 Ra7 draw
8 Rd8 draw
9 Kf7 loss in 2 half-moves
10 Ra1 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 Rc8 loss in 2 half-moves
15 Ra3 loss in 1 half-moves