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

EGTB: win in 4 half-moves

# move score
1 Rb4 win in 3 half-moves
2 Rb6 win in 3 half-moves
3 Rb5 win in 5 half-moves
4 Rb7 win in 9 half-moves
5 Kc4 draw
6 Kc5 draw
7 Kc6 draw
8 Ke2 draw
9 Rb8 draw
10 Rc2 draw
11 Kd1 loss in 2 half-moves
12 Kd3 loss in 2 half-moves
13 Kd4 loss in 2 half-moves
14 Kd6 loss in 2 half-moves
15 Ke1 loss in 2 half-moves
16 Ke3 loss in 2 half-moves
17 Ke4 loss in 2 half-moves
18 Ke5 loss in 2 half-moves
19 Ke6 loss in 2 half-moves
20 Ra2 loss in 2 half-moves
21 Rb1 loss in 2 half-moves
22 Rb3 loss in 2 half-moves
23 Kc1 loss in 1 half-moves
24 Kc2 loss in 1 half-moves
25 Kc3 loss in 1 half-moves