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

EGTB: win in 4 half-moves

# move score
1 Kbb5 win in 3 half-moves
2 Ka3 draw
3 Ka4 draw
4 Ka7 draw
5 Kaa5 draw
6 Kab5 draw
7 Kb3 draw
8 Kb6 draw
9 Kb7 draw
10 Kba5 draw
11 Kc3 loss in 2 half-moves
12 Kc4 loss in 2 half-moves
13 Kc5 loss in 2 half-moves