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

EGTB: win in 1 half-moves

# move score
1 Rxg8 win in 4 half-moves
2 fxg8=B loss in 2 half-moves
3 fxg8=K loss in 2 half-moves
4 fxg8=N loss in 2 half-moves
5 fxg8=Q loss in 2 half-moves
6 fxg8=R loss in 2 half-moves