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

EGTB: win in 4 half-moves

# move score
1 Kd1 win in 3 half-moves
2 Kd2 win in 3 half-moves
3 Kd3 loss in 22 half-moves
4 Kb3 loss in 20 half-moves
5 Kc1 loss in 16 half-moves
6 Kc3 loss in 16 half-moves
7 Kb1 loss in 14 half-moves
8 Kb2 loss in 14 half-moves