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

EGTB: win in 4 half-moves

# move score
1 Ka5 win in 3 half-moves
2 Ka6 win in 3 half-moves
3 Kc4 win in 3 half-moves
4 Kc5 win in 3 half-moves
5 Kc6 win in 3 half-moves
6 Rb4 win in 3 half-moves
7 Rb5 win in 3 half-moves
8 Kb5 win in 7 half-moves
9 Ka7 draw
10 Kb2 draw
11 Kb4 draw
12 Kb7 draw
13 Kc2 draw
14 Kc7 draw
15 Kd4 draw
16 Ra3 draw
17 Kd2 loss in 2 half-moves
18 Kd3 loss in 2 half-moves
19 Rb1 loss in 2 half-moves
20 Rb2 loss in 2 half-moves