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

EGTB: win in 2 half-moves

# move score
1 Kb5 win in 1 half-moves
2 Kc5 win in 1 half-moves
3 Kd5 win in 1 half-moves
4 Rb1 win in 1 half-moves
5 Rb2 win in 1 half-moves
6 Rb3 win in 1 half-moves
7 Rb4 win in 1 half-moves
8 Rb5 win in 1 half-moves
9 Kb7 loss in 2 half-moves
10 Kc7 loss in 2 half-moves
11 Kd6 loss in 2 half-moves
12 Kd7 loss in 2 half-moves
13 Ra6 loss in 2 half-moves
14 Rb7 loss in 2 half-moves
15 Rb8 loss in 2 half-moves