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

EGTB: win in 4 half-moves

# move score
1 K6b7 win in 3 half-moves
2 K7b7 win in 3 half-moves
3 Kb8 win in 3 half-moves
4 K6b6 draw
5 Ka5 loss in 8 half-moves
6 Ka8 loss in 6 half-moves
7 K7b6 loss in 2 half-moves
8 Kb5 loss in 2 half-moves