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

EGTB: win in 12 half-moves

# move score
1 K3b4 win in 11 half-moves
2 Kb5 win in 11 half-moves
3 Kb6 win in 11 half-moves
4 K5b4 win in 13 half-moves
5 Kb2 win in 13 half-moves
6 Kb3 win in 13 half-moves
7 K3a4 win in 15 half-moves
8 K5a4 win in 15 half-moves
9 Ka2 win in 15 half-moves
10 Ka6 win in 15 half-moves