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

EGTB: win in 4 half-moves

# move score
1 Kb4 win in 3 half-moves
2 Kb3 loss in 46 half-moves
3 Kd2 loss in 46 half-moves
4 Kd3 loss in 46 half-moves
5 Kb2 loss in 40 half-moves
6 Kc2 loss in 40 half-moves
7 Kc4 loss in 2 half-moves
8 Kd4 loss in 2 half-moves