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

EGTB: win in 2 half-moves

# move score
1 b4 win in 1 half-moves
2 K7b7 loss in 2 half-moves
3 K7b8 loss in 2 half-moves
4 K8b7 loss in 2 half-moves
5 K8b8 loss in 2 half-moves
6 Ka6 loss in 2 half-moves
7 Kb6 loss in 2 half-moves