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

EGTB: loss in 4 half-moves

# move score
1 Kg4 loss in 3 half-moves
2 Kh4 loss in 3 half-moves
3 a3 loss in 2 half-moves
4 Kg5 loss in 2 half-moves
5 Kg6 loss in 2 half-moves
6 Kh6 loss in 2 half-moves