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

EGTB: win in 4 half-moves

# move score
1 b5 win in 3 half-moves
2 Bc4 draw
3 Bf7 draw
4 Bg8 draw
5 Bb1 loss in 4 half-moves
6 Bb3 loss in 2 half-moves
7 Bd5 loss in 2 half-moves
8 Be6 loss in 2 half-moves