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 Kc4 draw
3 Rb1 draw
4 Rb2 draw
5 Kb2 loss in 18 half-moves
6 Kc2 loss in 14 half-moves
7 Kb4 loss in 6 half-moves
8 Kd2 loss in 4 half-moves
9 Kd3 loss in 4 half-moves
10 Ra3 loss in 4 half-moves
11 Kd4 loss in 2 half-moves
12 Rb4 loss in 2 half-moves
13 Rb5 loss in 2 half-moves
14 Rb6 loss in 2 half-moves
15 Rb7 loss in 2 half-moves