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

EGTB: win in 2 half-moves

# move score
1 Ka6 win in 1 half-moves
2 Kb6 win in 1 half-moves
3 Kb5 loss in 52 half-moves
4 Kb4 loss in 50 half-moves
5 Ka4 loss in 46 half-moves