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

EGTB: win in 4 half-moves

# move score
1 Kc5 win in 3 half-moves
2 Ra6 draw
3 Rb6 draw
4 Rc1 draw
5 Rc2 draw
6 Rc7 draw
7 Kc8 loss in 2 half-moves
8 Kd5 loss in 2 half-moves
9 Ke5 loss in 2 half-moves
10 Ke6 loss in 2 half-moves
11 Ke8 loss in 2 half-moves
12 Rc3 loss in 2 half-moves
13 Rc4 loss in 2 half-moves
14 Rc5 loss in 2 half-moves
15 Rc8 loss in 2 half-moves
16 K6c7 loss in 1 half-moves
17 K6d7 loss in 1 half-moves
18 K6e7 loss in 1 half-moves
19 K8c7 loss in 1 half-moves
20 K8d7 loss in 1 half-moves
21 K8e7 loss in 1 half-moves