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

EGTB: loss in 3 half-moves

# move score
1 Kb7 loss in 2 half-moves
2 Kb8 loss in 2 half-moves
3 b5 loss in 1 half-moves
4 Ka7 loss in 1 half-moves
5 Ke7 loss in 1 half-moves
6 Ke8 loss in 1 half-moves
7 Kf7 loss in 1 half-moves
8 Kg7 loss in 1 half-moves
9 Kg8 loss in 1 half-moves