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

EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Kc6 win in 3 half-moves
3 Kd4 loss in 54 half-moves
4 Kb5 loss in 48 half-moves
5 Kc4 loss in 48 half-moves
6 Kb4 loss in 42 half-moves
7 Kd5 loss in 2 half-moves
8 Kd6 loss in 2 half-moves