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

EGTB: win in 4 half-moves

# move score
1 Kb7 win in 3 half-moves
2 Kc7 win in 3 half-moves
3 Kd7 win in 3 half-moves
4 Rb7 win in 3 half-moves
5 Ka5 win in 7 half-moves
6 Kc5 win in 7 half-moves
7 Ka4 win in 9 half-moves
8 Kb5 win in 9 half-moves
9 Kc4 win in 9 half-moves
10 Rb6 win in 9 half-moves
11 Ra8 win in 25 half-moves
12 Ka3 draw
13 Kd8 draw
14 Rb5 draw
15 Kb3 loss in 2 half-moves
16 Kc3 loss in 2 half-moves