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

EGTB: win in 4 half-moves

# move score
1 Kb8 win in 3 half-moves
2 Ka5 draw
3 Ka6 draw
4 Ka7 draw
5 Kb4 draw
6 Kb6 draw
7 Kb7 draw
8 Kc4 draw
9 Kc5 draw
10 Kc6 draw
11 Ka4 loss in 8 half-moves