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

EGTB: win in 4 half-moves

# move score
1 Ka3 win in 3 half-moves
2 Kb5 loss in 50 half-moves
3 Ka5 loss in 40 half-moves
4 Kb3 loss in 2 half-moves
5 Kb4 loss in 2 half-moves