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

EGTB: win in 4 half-moves

# move score
1 Kc5 win in 3 half-moves
2 Rb8 win in 3 half-moves
3 Rc8 win in 3 half-moves
4 Kd5 win in 5 half-moves
5 Kd7 win in 5 half-moves
6 Rd7 win in 5 half-moves
7 Ka1 draw
8 Ka2 draw
9 Kb2 draw
10 Kc1 draw
11 Kc2 draw
12 Kc6 draw
13 Kc7 draw
14 Ke5 draw
15 Ke6 draw
16 Ke7 draw
17 Ra8 draw
18 Re8 draw
19 Rf8 draw
20 Rg8 loss in 2 half-moves
21 Rh8 loss in 2 half-moves