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 Kb3 win in 1 half-moves
3 Kb2 loss in 52 half-moves
4 Kb1 loss in 50 half-moves
5 Ka1 loss in 46 half-moves