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