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 Ka5 win in 5 half-moves
3 Kb5 win in 5 half-moves
4 Kb6 win in 5 half-moves
5 Kb7 win in 5 half-moves
6 Ra8 win in 5 half-moves
7 Kb4 win in 9 half-moves
8 Ka3 draw
9 Kb3 draw
10 Kb8 draw
11 Kd6 draw
12 Kd7 draw
13 Kd8 draw
14 Rd8 draw
15 Rh8 draw
16 Kc6 loss in 2 half-moves
17 Re8 loss in 2 half-moves
18 Rf8 loss in 2 half-moves
19 Rg8 loss in 2 half-moves