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

EGTB: win in 4 half-moves

# move score
1 Kb1 win in 3 half-moves
2 Kb2 win in 3 half-moves
3 Kb3 win in 3 half-moves
4 Kc2 win in 3 half-moves
5 Ra2 win in 5 half-moves
6 Kc3 win in 7 half-moves
7 Kc4 win in 7 half-moves
8 Rb1 win in 7 half-moves
9 Ka3 win in 9 half-moves
10 Ka4 win in 9 half-moves
11 Kb5 win in 9 half-moves
12 Ra4 win in 9 half-moves
13 Ka5 win in 11 half-moves
14 Kc5 win in 11 half-moves
15 Ra7 win in 21 half-moves
16 Ra6 draw
17 Ra8 draw
18 Kd1 loss in 2 half-moves
19 Kd2 loss in 2 half-moves
20 Ra3 loss in 2 half-moves
21 Ra5 loss in 2 half-moves