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

EGTB: win in 4 half-moves

# move score
1 Kbb7 win in 3 half-moves
2 Ka8 draw
3 Kaa7 draw
4 Kab7 draw
5 Kb6 draw
6 Kba7 draw
7 Kc7 loss in 2 half-moves
8 Kc8 loss in 2 half-moves
9 Ka5 loss in 1 half-moves
10 Kb5 loss in 1 half-moves