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 Ka5 draw
3 Ka7 draw
4 Kd4 draw
5 Kd5 draw
6 Ke4 draw
7 Kf4 draw
8 Kf5 draw
9 Ra1 draw
10 Ra2 draw
11 Ra3 draw
12 Ra5 draw
13 Rb4 draw
14 Re4 draw
15 Rg4 draw
16 Kb6 loss in 2 half-moves
17 Kb7 loss in 2 half-moves
18 Kd6 loss in 2 half-moves
19 Ke6 loss in 2 half-moves
20 Kf6 loss in 2 half-moves
21 Rc4 loss in 2 half-moves
22 Rd4 loss in 2 half-moves
23 Rf4 loss in 2 half-moves
24 Rh4 loss in 2 half-moves