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

EGTB: win in 4 half-moves

# move score
1 Rb5 win in 3 half-moves
2 K6d7 draw
3 K6e7 draw
4 K6f7 draw
5 K8d7 draw
6 K8e7 draw
7 K8f7 draw
8 Kd6 draw
9 Kd8 draw
10 Kf6 draw
11 Kf8 draw
12 Ra3 draw
13 Rb4 draw
14 Rb6 draw
15 Rb7 draw
16 Rb8 draw
17 Rc3 draw
18 Rg3 draw
19 Rh3 draw
20 Kd5 loss in 2 half-moves
21 Ke5 loss in 2 half-moves
22 Kf5 loss in 2 half-moves
23 Rb1 loss in 2 half-moves
24 Rb2 loss in 2 half-moves
25 Rd3 loss in 2 half-moves
26 Re3 loss in 2 half-moves
27 Rf3 loss in 2 half-moves