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

EGTB: win in 4 half-moves

# move score
1 Ked7 win in 3 half-moves
2 Kf7 win in 3 half-moves
3 Kc6 win in 5 half-moves
4 Ke7 win in 5 half-moves
5 Kf8 win in 5 half-moves
6 Ked8 draw
7 Rd8 draw
8 Kb6 loss in 2 half-moves
9 Kb7 loss in 2 half-moves
10 Kb8 loss in 2 half-moves
11 Kcd7 loss in 2 half-moves
12 Kcd8 loss in 2 half-moves
13 Kd6 loss in 2 half-moves
14 Ra8 loss in 2 half-moves
15 Rb8 loss in 2 half-moves