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

EGTB: win in 4 half-moves

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