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

EGTB: win in 2 half-moves

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