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

EGTB: win in 4 half-moves

# move score
1 Kg6 win in 3 half-moves
2 Rg7 win in 3 half-moves
3 Kg5 loss in 8 half-moves
4 Re7 loss in 8 half-moves
5 Rf7 loss in 8 half-moves
6 Kg7 loss in 6 half-moves
7 Kh5 loss in 4 half-moves
8 Rh8 loss in 4 half-moves
9 Ra7 loss in 2 half-moves
10 Rb7 loss in 2 half-moves
11 Rc7 loss in 2 half-moves
12 Rd7 loss in 2 half-moves