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

EGTB: win in 6 half-moves

# move score
1 Rg7 win in 5 half-moves
2 Kf6 draw
3 Kf7 draw
4 Kgg7 draw
5 Kgh5 draw
6 Khh5 draw
7 Rh8 draw
8 Kf5 loss in 2 half-moves
9 Kgg5 loss in 2 half-moves
10 Khg5 loss in 2 half-moves
11 Khg7 loss in 2 half-moves
12 Ra7 loss in 2 half-moves
13 Rb7 loss in 2 half-moves
14 Rc7 loss in 2 half-moves
15 Rd7 loss in 2 half-moves
16 Re7 loss in 2 half-moves
17 Rf7 loss in 2 half-moves