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 Rb2 draw
3 Rb3 draw
4 Rb4 draw
5 Rb5 draw
6 K7c7 loss in 2 half-moves
7 K7c8 loss in 2 half-moves
8 K7e7 loss in 2 half-moves
9 K7e8 loss in 2 half-moves
10 K8c7 loss in 2 half-moves
11 K8c8 loss in 2 half-moves
12 K8e7 loss in 2 half-moves
13 K8e8 loss in 2 half-moves
14 Kc6 loss in 2 half-moves
15 Kd6 loss in 2 half-moves
16 Ke6 loss in 2 half-moves
17 Ra8 loss in 2 half-moves
18 Rb1 loss in 2 half-moves
19 Rb6 loss in 2 half-moves
20 Rb7 loss in 2 half-moves