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 Kdc6 win in 7 half-moves
3 Kdd6 win in 7 half-moves
4 Ke6 win in 7 half-moves
5 Ke7 win in 7 half-moves
6 Ke8 win in 7 half-moves
7 Ra8 win in 7 half-moves
8 Rd8 win in 7 half-moves
9 Rh8 win in 7 half-moves
10 Kb6 draw
11 Kb7 draw
12 Kb8 draw
13 Kcc6 draw
14 Kcd6 draw
15 Kcd8 draw
16 Kdd8 draw
17 Rg8 draw
18 Re8 loss in 2 half-moves
19 Rf8 loss in 2 half-moves