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

EGTB: loss in 4 half-moves

# move score
1 a2 loss in 3 half-moves
2 Kg7 loss in 3 half-moves
3 Kh7 loss in 3 half-moves
4 Kh8 loss in 3 half-moves
5 Kf7 loss in 2 half-moves
6 Kf8 loss in 2 half-moves