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

EGTB: win in 4 half-moves

# move score
1 Rb4 win in 3 half-moves
2 Kb4 draw
3 Kb7 draw
4 Kb8 draw
5 Kc7 draw
6 Kd4 draw
7 Kd7 draw
8 Kd8 draw
9 Ra6 draw
10 Ra8 draw
11 Kb3 loss in 2 half-moves
12 Kb5 loss in 2 half-moves
13 Kc3 loss in 2 half-moves
14 Kc5 loss in 2 half-moves
15 Kd3 loss in 2 half-moves
16 Kd5 loss in 2 half-moves
17 Ra1 loss in 2 half-moves
18 Ra2 loss in 2 half-moves
19 Ra3 loss in 2 half-moves
20 Ra5 loss in 2 half-moves
21 Ra7 loss in 2 half-moves