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

EGTB: win in 2 half-moves

# move score
1 Rb4 win in 1 half-moves
2 Rb5 win in 1 half-moves
3 Rb7 win in 1 half-moves
4 Rb8 win in 1 half-moves
5 Kc5 loss in 2 half-moves
6 Kc6 loss in 2 half-moves
7 Kc7 loss in 2 half-moves
8 Ke5 loss in 2 half-moves
9 Ke6 loss in 2 half-moves
10 Ke7 loss in 2 half-moves
11 Ka2 loss in 1 half-moves
12 Ka3 loss in 1 half-moves
13 Ka4 loss in 1 half-moves
14 Kb2 loss in 1 half-moves
15 Kb4 loss in 1 half-moves
16 Kc2 loss in 1 half-moves
17 Kc3 loss in 1 half-moves
18 Kc4 loss in 1 half-moves
19 Kd5 loss in 1 half-moves
20 Kd7 loss in 1 half-moves
21 Ra6 loss in 1 half-moves
22 Rc6 loss in 1 half-moves