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 Kc8 win in 3 half-moves
3 Rc8 win in 5 half-moves
4 Kc5 win in 7 half-moves
5 Kd5 win in 7 half-moves
6 Ke8 win in 13 half-moves
7 K6c7 draw
8 K6d7 draw
9 K6e7 draw
10 Ke5 draw
11 Ke6 draw
12 Ra8 draw
13 Rb1 draw
14 Rb6 draw
15 K8c7 loss in 2 half-moves
16 K8d7 loss in 2 half-moves
17 K8e7 loss in 2 half-moves
18 Rb2 loss in 2 half-moves
19 Rb3 loss in 2 half-moves
20 Rb4 loss in 2 half-moves
21 Rb5 loss in 2 half-moves
22 Rb7 loss in 2 half-moves