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

EGTB: win in 4 half-moves

# move score
1 K4b3 win in 3 half-moves
2 Ka5 draw
3 K3b3 loss in 2 half-moves
4 K3b4 loss in 2 half-moves
5 K4b4 loss in 2 half-moves
6 Ka2 loss in 2 half-moves
7 Kb2 loss in 2 half-moves
8 Kb5 loss in 2 half-moves