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

EGTB: win in 4 half-moves

# move score
1 b7 win in 3 half-moves
2 Ba8 loss in 2 half-moves
3 Bb1 loss in 2 half-moves
4 Bb7 loss in 2 half-moves
5 Bc2 loss in 2 half-moves
6 Bf3 loss in 2 half-moves
7 Bg2 loss in 2 half-moves
8 Bh1 loss in 2 half-moves
9 Bh7 loss in 2 half-moves
10 Bc6 loss in 1 half-moves
11 Bd3 loss in 1 half-moves
12 Bd5 loss in 1 half-moves
13 Bf5 loss in 1 half-moves
14 Bg6 loss in 1 half-moves