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 Kb4 draw
3 Kc4 draw
4 Kd4 draw
5 Kd6 draw
6 Rb3 draw
7 Rb6 draw
8 Rb7 draw
9 Kc6 loss in 12 half-moves
10 Kb6 loss in 8 half-moves
11 Kd5 loss in 8 half-moves
12 Ra5 loss in 8 half-moves
13 Rb1 loss in 2 half-moves
14 Rb2 loss in 2 half-moves
15 Rb4 loss in 2 half-moves