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

EGTB: win in 2 half-moves

# move score
1 Kb5 win in 1 half-moves
2 Kb6 win in 1 half-moves
3 Kb7 win in 1 half-moves
4 Kd5 loss in 52 half-moves
5 Kd6 loss in 52 half-moves
6 Kc5 loss in 44 half-moves
7 Kc7 loss in 42 half-moves
8 Kd7 loss in 42 half-moves