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

EGTB: win in 2 half-moves

# move score
1 Ka5 win in 1 half-moves
2 Kb5 win in 1 half-moves
3 Kb7 loss in 16 half-moves
4 Ka7 loss in 14 half-moves
5 Kb6 loss in 2 half-moves