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

EGTB: win in 6 half-moves

# move score
1 Ra7 win in 5 half-moves
2 Ra8 win in 5 half-moves
3 Kb7 draw
4 Kb8 draw
5 Kd3 draw
6 Ra1 draw
7 Ra5 draw
8 Ra6 draw
9 Rb3 draw
10 Kc2 loss in 2 half-moves
11 Kc4 loss in 2 half-moves
12 Kc7 loss in 2 half-moves
13 Kd2 loss in 2 half-moves
14 Kd4 loss in 2 half-moves
15 Kd7 loss in 2 half-moves
16 Kd8 loss in 2 half-moves
17 Ra2 loss in 2 half-moves
18 Ra4 loss in 2 half-moves
19 Kb2 loss in 1 half-moves
20 Kb3 loss in 1 half-moves
21 Kb4 loss in 1 half-moves