Click on the third or sixth rank to set the en passant target square.

EGTB: win in 2 half-moves

# move score
1 Rb7 win in 1 half-moves
2 Rb4 draw
3 Ra2 loss in 4 half-moves
4 Kb1 loss in 2 half-moves
5 Kb3 loss in 2 half-moves
6 Kc1 loss in 2 half-moves
7 Kc3 loss in 2 half-moves
8 Kd1 loss in 2 half-moves
9 Kd2 loss in 2 half-moves
10 Kd3 loss in 2 half-moves
11 Rb1 loss in 2 half-moves
12 Rb3 loss in 2 half-moves
13 Rb5 loss in 2 half-moves
14 Rb6 loss in 2 half-moves
15 Rb8 loss in 2 half-moves