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

EGTB: win in 14 half-moves

# move score
1 Kb7 win in 13 half-moves
2 Ka5 win in 15 half-moves
3 Ka7 win in 19 half-moves
4 Kb5 loss in 2 half-moves
5 Kb6 loss in 2 half-moves