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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Kb4 win in 5 half-moves
3 Kb8 win in 5 half-moves
4 Kb3 win in 7 half-moves
5 Kb5 win in 7 half-moves
6 Kc5 win in 7 half-moves
7 Ra4 win in 7 half-moves
8 Kc3 win in 13 half-moves
9 Kd8 win in 15 half-moves
10 Kd3 draw
11 Kd4 draw
12 Kd5 draw
13 Ra1 draw
14 Kb7 loss in 2 half-moves
15 Kc7 loss in 2 half-moves
16 Kd7 loss in 2 half-moves
17 Ra2 loss in 2 half-moves
18 Ra3 loss in 2 half-moves
19 Ra5 loss in 2 half-moves
20 Ra6 loss in 2 half-moves
21 Ra7 loss in 2 half-moves