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

EGTB: win in 4 half-moves

# move score
1 Kb3 win in 3 half-moves
2 Rb5 win in 3 half-moves
3 Ka2 win in 5 half-moves
4 Ra4 win in 5 half-moves
5 Ka4 win in 7 half-moves
6 Kab4 draw
7 Kb2 draw
8 Kb5 draw
9 Ra8 draw
10 Kb6 loss in 2 half-moves
11 Kc4 loss in 2 half-moves
12 Kc6 loss in 2 half-moves
13 Kcb4 loss in 2 half-moves
14 Kd4 loss in 2 half-moves
15 Kd5 loss in 2 half-moves
16 Kd6 loss in 2 half-moves
17 Ra6 loss in 2 half-moves
18 Ra7 loss in 2 half-moves