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

EGTB: win in 6 half-moves

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