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

EGTB: win in 2 half-moves

# move score
1 Rb5 win in 1 half-moves
2 Rb6 win in 1 half-moves
3 Kb7 loss in 2 half-moves
4 Kc7 loss in 2 half-moves
5 Kd7 loss in 2 half-moves
6 Kd8 loss in 2 half-moves
7 Ra8 loss in 2 half-moves
8 Rb7 loss in 2 half-moves
9 Rb1 loss in 1 half-moves
10 Rb2 loss in 1 half-moves
11 Rb3 loss in 1 half-moves
12 Rb4 loss in 1 half-moves