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

EGTB: win in 4 half-moves

# move score
1 Ra5 win in 3 half-moves
2 Kg4 draw
3 Kg5 draw
4 Kh4 draw
5 Kh6 draw
6 Ra1 draw
7 Ra3 draw
8 Ra4 draw
9 Rd2 draw
10 Rh2 draw
11 Kg6 loss in 2 half-moves
12 Ra6 loss in 2 half-moves
13 Ra7 loss in 2 half-moves
14 Ra8 loss in 2 half-moves
15 Rb2 loss in 2 half-moves
16 Rc2 loss in 2 half-moves
17 Re2 loss in 2 half-moves
18 Rf2 loss in 2 half-moves
19 Rg2 loss in 2 half-moves