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