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

EGTB: win in 6 half-moves

# move score
1 Kb6 win in 5 half-moves
2 Kbb4 win in 5 half-moves
3 Kc6 win in 5 half-moves
4 Kc4 win in 7 half-moves
5 Ka3 draw
6 Ka6 draw
7 Kc5 draw
8 Ra6 draw
9 Ra7 draw
10 Ra8 draw
11 Kab4 loss in 2 half-moves
12 Kb3 loss in 2 half-moves