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

EGTB: win in 8 half-moves

# move score
1 Kb5 win in 7 half-moves
2 Kb6 draw
3 Kb7 draw
4 Kc7 draw
5 Kd6 draw
6 Kd7 draw
7 Ra1 draw
8 Ra5 draw
9 Ra6 draw
10 Ra7 draw
11 Ra8 draw
12 Ka1 loss in 2 half-moves
13 Ka3 loss in 2 half-moves
14 Kb1 loss in 2 half-moves
15 Kb3 loss in 2 half-moves
16 Kc1 loss in 2 half-moves
17 Kc2 loss in 2 half-moves
18 Kc3 loss in 2 half-moves
19 Kc5 loss in 2 half-moves
20 Kd5 loss in 2 half-moves
21 Ra3 loss in 2 half-moves
22 Ra4 loss in 2 half-moves