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

EGTB: win in 4 half-moves

# move score
1 Kb5 win in 3 half-moves
2 K5b6 draw
3 K5c6 draw
4 K5d6 draw
5 K7b6 draw
6 K7c6 draw
7 K7d6 draw
8 Kb7 draw
9 Kb8 draw
10 Kc8 draw
11 Kd8 draw
12 Ra6 draw
13 Ra7 draw
14 Rb5 draw
15 Kb4 loss in 2 half-moves
16 Kc4 loss in 2 half-moves
17 Kd4 loss in 2 half-moves
18 Kd5 loss in 2 half-moves
19 Kd7 loss in 2 half-moves
20 Ra1 loss in 2 half-moves
21 Ra2 loss in 2 half-moves
22 Ra3 loss in 2 half-moves
23 Ra4 loss in 2 half-moves
24 Ra8 loss in 2 half-moves