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

EGTB: win in 2 half-moves

# move score
1 Ka7 win in 1 half-moves
2 Kc8 loss in 8 half-moves
3 Ka8 loss in 2 half-moves
4 Kb7 loss in 2 half-moves
5 Kc7 loss in 2 half-moves