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

EGTB: win in 2 half-moves

# move score
1 Kb5 win in 1 half-moves
2 Kb4 loss in 28 half-moves
3 Kb6 loss in 28 half-moves
4 Ka4 loss in 24 half-moves
5 Ka6 loss in 24 half-moves