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

EGTB: win in 4 half-moves

# move score
1 Kb5 win in 3 half-moves
2 Kd6 loss in 24 half-moves
3 Kb6 loss in 22 half-moves
4 Kd7 loss in 20 half-moves
5 Kc7 loss in 14 half-moves
6 Kb7 loss in 12 half-moves
7 Kc5 loss in 2 half-moves
8 Kd5 loss in 2 half-moves