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

EGTB: win in 4 half-moves

# move score
1 Rb6 win in 3 half-moves
2 Kb6 draw
3 Kd8 draw
4 Kf8 draw
5 Ra1 draw
6 Ra7 draw
7 Ra8 draw
8 Kb5 loss in 2 half-moves
9 Kb7 loss in 2 half-moves
10 Kc5 loss in 2 half-moves
11 Kc7 loss in 2 half-moves
12 Kcd7 loss in 2 half-moves
13 Kd5 loss in 2 half-moves
14 Kd6 loss in 2 half-moves
15 Ke7 loss in 2 half-moves
16 Ked7 loss in 2 half-moves
17 Kf7 loss in 2 half-moves
18 Ra2 loss in 2 half-moves
19 Ra3 loss in 2 half-moves
20 Ra4 loss in 2 half-moves
21 Ra5 loss in 2 half-moves