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

EGTB: win in 4 half-moves

# move score
1 Kb4 win in 3 half-moves
2 Ka4 win in 5 half-moves
3 Kb5 draw
4 Kb6 loss in 18 half-moves
5 Ka6 loss in 16 half-moves