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