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

EGTB: loss in 5 half-moves

# move score
1 b5 loss in 4 half-moves
2 Kb7 loss in 4 half-moves
3 Kb8 loss in 4 half-moves
4 Kc6 loss in 4 half-moves
5 Kc8 loss in 4 half-moves
6 Kd6 loss in 4 half-moves
7 Kd7 loss in 4 half-moves
8 Kd8 loss in 4 half-moves
9 Ka6 loss in 3 half-moves
10 Kb5 loss in 3 half-moves
11 Ka4 loss in 2 half-moves
12 Kb4 loss in 2 half-moves