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

EGTB: loss in 1 half-moves

# move score
1 axb1=B loss in 2 half-moves
2 axb1=K loss in 2 half-moves
3 axb1=N loss in 2 half-moves
4 axb1=Q loss in 2 half-moves
5 axb1=R loss in 2 half-moves
6 Kxf6 loss in 2 half-moves