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

EGTB: win in 4 half-moves

# move score
1 Kc2 win in 3 half-moves
2 Kd2 win in 3 half-moves
3 Ra2 win in 3 half-moves
4 Ra3 win in 3 half-moves
5 Kb3 win in 7 half-moves
6 Rc1 win in 7 half-moves
7 Ke2 win in 11 half-moves
8 Ka4 win in 17 half-moves
9 Ka5 win in 17 half-moves
10 Kb5 win in 17 half-moves
11 Rb1 win in 17 half-moves
12 Ka3 win in 27 half-moves
13 Kc1 draw
14 Kc3 draw
15 Kc4 draw
16 Kc5 draw
17 Ke1 draw
18 Ra4 draw
19 Ra8 draw
20 Ra5 loss in 2 half-moves
21 Ra6 loss in 2 half-moves
22 Ra7 loss in 2 half-moves