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

EGTB: win in 2 half-moves

# move score
1 Rf6 win in 1 half-moves
2 Rb7 loss in 6 half-moves
3 Rc7 loss in 6 half-moves
4 Rd7 loss in 6 half-moves
5 Re7 loss in 6 half-moves
6 Rf8 loss in 2 half-moves
7 Rg7 loss in 2 half-moves
8 Rh7 loss in 2 half-moves
9 f6 loss in 1 half-moves
10 Ra7 loss in 1 half-moves