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

EGTB: win in 4 half-moves

# move score
1 Ra8 win in 3 half-moves
2 Ra1 draw
3 Ra5 draw
4 Ra6 draw
5 Ra7 draw
6 Re4 draw
7 Rf4 draw
8 Rg4 draw
9 Rh4 draw
10 Kf7 loss in 2 half-moves
11 Kf8 loss in 2 half-moves
12 Kgg7 loss in 2 half-moves
13 Kgh7 loss in 2 half-moves
14 Khg7 loss in 2 half-moves
15 Khh7 loss in 2 half-moves
16 Ra2 loss in 2 half-moves
17 Ra3 loss in 2 half-moves
18 Rb4 loss in 2 half-moves
19 Rc4 loss in 2 half-moves
20 Rd4 loss in 2 half-moves