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 Ka4 draw
3 Ka5 draw
4 Ka6 draw
5 Kb6 draw
6 Kc4 draw
7 Kc5 draw
8 Kc6 draw
9 Ra7 draw
10 Rc7 draw
11 Kb4 loss in 6 half-moves
12 Rd7 loss in 4 half-moves
13 Rb6 loss in 2 half-moves
14 Rf7 loss in 2 half-moves
15 Rg7 loss in 2 half-moves
16 Rh7 loss in 2 half-moves
17 Re7 loss in 1 half-moves