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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Kb7 win in 7 half-moves
3 Ka7 win in 9 half-moves
4 Ra8 win in 17 half-moves
5 Rc8 win in 21 half-moves
6 Ka5 draw
7 Kb5 draw
8 Kb6 draw
9 Ke6 draw
10 Rd8 draw
11 Rh8 draw
12 Kd6 loss in 2 half-moves
13 Kd7 loss in 2 half-moves
14 Kd8 loss in 2 half-moves
15 Kf6 loss in 2 half-moves
16 Kf7 loss in 2 half-moves
17 Kf8 loss in 2 half-moves
18 Rf8 loss in 2 half-moves
19 Rg8 loss in 2 half-moves