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

EGTB: win in 2 half-moves

# move score
1 Ka3 win in 1 half-moves
2 Ka5 win in 1 half-moves
3 Kb3 loss in 18 half-moves
4 Kb4 loss in 16 half-moves
5 Kb5 loss in 16 half-moves