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 Ka4 win in 1 half-moves
3 Ka5 win in 1 half-moves
4 Kc4 loss in 44 half-moves
5 Kc5 loss in 44 half-moves
6 Kb3 loss in 42 half-moves
7 Kb5 loss in 42 half-moves
8 Kc3 loss in 42 half-moves