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 Rb4 draw
3 Rb6 draw
4 Rb7 draw
5 Rb8 draw
6 Re1 draw
7 Rf1 draw
8 Rg1 draw
9 Rh1 draw
10 Kc5 loss in 2 half-moves
11 Kc6 loss in 2 half-moves
12 Kc8 loss in 2 half-moves
13 Kd5 loss in 2 half-moves
14 Ke5 loss in 2 half-moves
15 Ke6 loss in 2 half-moves
16 Ke8 loss in 2 half-moves
17 Ra1 loss in 2 half-moves
18 Rb2 loss in 2 half-moves
19 Rb3 loss in 2 half-moves
20 Rc1 loss in 2 half-moves
21 Rd1 loss in 2 half-moves
22 K6c7 loss in 1 half-moves
23 K6d7 loss in 1 half-moves
24 K6e7 loss in 1 half-moves
25 K8c7 loss in 1 half-moves
26 K8d7 loss in 1 half-moves
27 K8e7 loss in 1 half-moves