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

EGTB: win in 2 half-moves

# move score
1 Kb4 win in 1 half-moves
2 K5a6 loss in 3 half-moves
3 b5 loss in 2 half-moves
4 K7a6 loss in 2 half-moves
5 Ka8 loss in 2 half-moves
6 Kb5 loss in 2 half-moves
7 Kb7 loss in 2 half-moves
8 Kb8 loss in 2 half-moves
9 Ka4 loss in 1 half-moves