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 Ba4 loss in 2 half-moves
3 Bb5 loss in 2 half-moves
4 Bc6 loss in 2 half-moves
5 Bd7 loss in 2 half-moves
6 Bf7 loss in 2 half-moves
7 Bg6 loss in 2 half-moves
8 Bh5 loss in 2 half-moves