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

EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Ka6 win in 7 half-moves
3 Ra6 win in 7 half-moves
4 Ke8 win in 9 half-moves
5 Ke7 win in 15 half-moves
6 Ra7 win in 15 half-moves
7 Kf7 win in 23 half-moves
8 Rb8 win in 23 half-moves
9 Ka4 draw
10 Kb4 draw
11 Kb5 draw
12 Kg7 draw
13 Kg8 draw
14 Rc8 draw
15 Rd8 draw
16 Re8 draw