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 Kb5 win in 5 half-moves
3 Kc6 win in 5 half-moves
4 Kc7 win in 5 half-moves
5 Kc8 win in 5 half-moves
6 Kd5 win in 5 half-moves
7 Kd6 win in 5 half-moves
8 Kd7 win in 5 half-moves
9 Rb8 win in 5 half-moves
10 Rc8 win in 5 half-moves
11 Kb4 draw
12 Kc4 draw
13 Ke7 draw
14 Ke8 draw
15 Ra1 draw
16 Ra2 draw
17 Ra3 draw
18 Ra4 draw
19 Ra5 draw
20 Kd4 loss in 2 half-moves
21 Ra6 loss in 2 half-moves
22 Ra7 loss in 2 half-moves