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

EGTB: win in 2 half-moves

# move score
1 Kb6 win in 1 half-moves
2 Kb7 win in 1 half-moves
3 b4 loss in 1 half-moves
4 K4a5 loss in 1 half-moves
5 K6a5 loss in 1 half-moves
6 Ka3 loss in 1 half-moves
7 Ka7 loss in 1 half-moves
8 Kb3 loss in 1 half-moves
9 Kb4 loss in 1 half-moves