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

EGTB: win in 4 half-moves

# move score
1 Rb3 win in 3 half-moves
2 Kb6 win in 5 half-moves
3 Ra7 win in 5 half-moves
4 Rb6 win in 5 half-moves
5 Kb8 win in 7 half-moves
6 Kc8 win in 7 half-moves
7 Kd7 win in 7 half-moves
8 Kd8 win in 7 half-moves
9 Rb8 win in 7 half-moves
10 Kc6 loss in 2 half-moves
11 Kd6 loss in 2 half-moves
12 Rb1 loss in 2 half-moves
13 Rb2 loss in 2 half-moves
14 Rb4 loss in 2 half-moves
15 Rb5 loss in 2 half-moves