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 Kc7 draw
3 Kc8 draw
4 Kde8 draw
5 Kfe8 draw
6 Kg8 draw
7 Ra8 draw
8 Rb3 draw
9 Rb4 draw
10 Rb6 draw
11 Rb7 draw
12 Kd7 loss in 2 half-moves
13 Kde7 loss in 2 half-moves
14 Kf7 loss in 2 half-moves
15 Kfe7 loss in 2 half-moves
16 Kg7 loss in 2 half-moves
17 Rb1 loss in 2 half-moves
18 Rb2 loss in 2 half-moves
19 Rb5 loss in 2 half-moves