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

EGTB: win in 4 half-moves

# move score
1 Rc8 win in 3 half-moves
2 Kc5 win in 7 half-moves
3 Kc8 win in 7 half-moves
4 Ka5 win in 9 half-moves
5 Kb5 win in 9 half-moves
6 Kc4 win in 9 half-moves
7 Ra8 win in 9 half-moves
8 Ka4 win in 11 half-moves
9 Kc7 win in 11 half-moves
10 Kd7 win in 11 half-moves
11 Ka3 draw
12 Kb3 draw
13 Kc3 draw
14 Ke7 draw
15 Ke8 draw
16 Rb5 loss in 2 half-moves
17 Rb6 loss in 2 half-moves
18 Rb7 loss in 2 half-moves