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

EGTB: win in 4 half-moves

# move score
1 Kb8 win in 3 half-moves
2 Rb8 win in 3 half-moves
3 Ra1 draw
4 Ra2 draw
5 Ra3 draw
6 Ra4 draw
7 Ra5 draw
8 Kb7 loss in 2 half-moves
9 Kc7 loss in 2 half-moves
10 Kd7 loss in 2 half-moves
11 Kd8 loss in 2 half-moves
12 Ra6 loss in 2 half-moves
13 Ra7 loss in 2 half-moves