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

EGTB: loss in 5 half-moves

# move score
1 Kh6 loss in 4 half-moves
2 a3 loss in 3 half-moves
3 Kh7 loss in 3 half-moves
4 Kh8 loss in 3 half-moves
5 Kg6 loss in 2 half-moves
6 Kg8 loss in 2 half-moves
7 Kf6 loss in 1 half-moves
8 Kf7 loss in 1 half-moves
9 Kf8 loss in 1 half-moves