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

EGTB: win in 4 half-moves

# move score
1 Bc1 win in 3 half-moves
2 Be7 win in 3 half-moves
3 Bb2 win in 7 half-moves
4 Bf8 win in 7 half-moves
5 Bb4 win in 9 half-moves
6 Bc5 win in 9 half-moves
7 Bd6 loss in 2 half-moves