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

EGTB: win in 4 half-moves

# move score
1 f7 win in 3 half-moves
2 Rg1 draw
3 Rg5 draw
4 Rg7 draw
5 Rg8 draw
6 Rh6 loss in 4 half-moves
7 Rg2 loss in 2 half-moves
8 Rg3 loss in 2 half-moves
9 Rg4 loss in 2 half-moves