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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Kc5 win in 5 half-moves
3 Rf5 win in 5 half-moves
4 Rf7 win in 5 half-moves
5 Ka1 draw
6 Ka2 draw
7 Kb2 draw
8 Kb6 draw
9 Kb7 draw
10 Kc1 draw
11 Kc2 draw
12 Kc7 draw
13 Kd5 draw
14 Kd6 draw
15 Kd7 draw
16 Ra8 draw
17 Rc8 draw
18 Rd8 draw
19 Re8 draw
20 Rf3 draw
21 Rf4 draw
22 Rf6 draw
23 Kb5 loss in 2 half-moves
24 Rf1 loss in 2 half-moves
25 Rf2 loss in 2 half-moves
26 Rg8 loss in 2 half-moves
27 Rh8 loss in 2 half-moves