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 Rg3 draw
3 Rg4 draw
4 Rg5 draw
5 Rg7 draw
6 Rg8 draw
7 Rh6 draw
8 Rg1 loss in 2 half-moves
9 Rg2 loss in 2 half-moves