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

EGTB: win in 4 half-moves

# move score
1 Kb4 win in 3 half-moves
2 Kc1 win in 9 half-moves
3 Kc3 win in 9 half-moves
4 Kc4 win in 9 half-moves
5 Kd1 win in 9 half-moves
6 Ra2 win in 9 half-moves
7 Rc1 win in 9 half-moves
8 Rc3 win in 9 half-moves
9 Ke2 win in 13 half-moves
10 Kb5 draw
11 Kb6 draw
12 Kc6 draw
13 Ke1 draw
14 Rb2 draw
15 Kd3 loss in 2 half-moves
16 Kd4 loss in 2 half-moves
17 Kd5 loss in 2 half-moves
18 Kd6 loss in 2 half-moves
19 Ke3 loss in 2 half-moves
20 Rc4 loss in 2 half-moves