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

EGTB: win in 4 half-moves

# move score
1 Kc6 win in 3 half-moves
2 Kd6 loss in 8 half-moves
3 Kc7 loss in 6 half-moves
4 Rb8 loss in 6 half-moves
5 Rc7 loss in 6 half-moves
6 Kc8 loss in 4 half-moves
7 Kd8 loss in 4 half-moves
8 Ke7 loss in 4 half-moves
9 Ke8 loss in 4 half-moves
10 Ra7 loss in 4 half-moves
11 Ke6 loss in 2 half-moves
12 Rb1 loss in 2 half-moves
13 Rb2 loss in 2 half-moves
14 Rb3 loss in 2 half-moves
15 Rb4 loss in 2 half-moves
16 Rb5 loss in 2 half-moves
17 Rb6 loss in 2 half-moves