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 K6b6 draw
3 K6b7 draw
4 K7b6 draw
5 K7b7 draw
6 Kb8 draw
7 Ka8 loss in 22 half-moves
8 Ka5 loss in 16 half-moves