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 Kab6 draw
3 Kbb6 draw
4 Kc7 draw
5 Kb8 loss in 20 half-moves
6 Kaa7 loss in 18 half-moves
7 Kc8 loss in 18 half-moves
8 Ka5 loss in 14 half-moves
9 Ka8 loss in 14 half-moves
10 Kba7 loss in 14 half-moves
11 Kc6 loss in 2 half-moves