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 Kc5 win in 3 half-moves
4 Kb7 win in 5 half-moves
5 Kc6 win in 5 half-moves
6 Kc7 win in 5 half-moves
7 Rb7 win in 5 half-moves
8 Ra8 win in 19 half-moves
9 Ka4 draw
10 Kb4 draw
11 Kb6 draw
12 Kc4 draw
13 Kd7 loss in 2 half-moves
14 Kd8 loss in 2 half-moves
15 Rb6 loss in 2 half-moves