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

EGTB: win in 2 half-moves

# move score
1 Ka4 win in 1 half-moves
2 Ka7 win in 1 half-moves
3 Kb4 win in 1 half-moves
4 Kb7 win in 1 half-moves
5 K5b5 loss in 1 half-moves
6 K5b6 loss in 1 half-moves
7 K6b5 loss in 1 half-moves
8 K6b6 loss in 1 half-moves