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

EGTB: win in 4 half-moves

# move score
1 Kc4 win in 3 half-moves
2 Kb7 draw
3 Kb8 draw
4 Kc2 draw
5 Kc3 draw
6 Kc7 draw
7 Kd2 draw
8 Ke2 draw
9 Ke3 draw
10 Ke4 draw
11 Ra1 draw
12 Ra2 draw
13 Ra4 draw
14 Ra5 draw
15 Ra8 draw
16 Rb3 draw
17 Rc3 draw
18 Kd4 loss in 2 half-moves
19 Kd7 loss in 2 half-moves
20 Kd8 loss in 2 half-moves
21 Ra6 loss in 2 half-moves
22 Ra7 loss in 2 half-moves