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 Kb6 draw
3 Kc5 draw
4 Kd5 draw
5 Kd6 draw
6 Kd7 draw
7 Kc7 loss in 46 half-moves
8 Kb7 loss in 44 half-moves