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

EGTB: win in 4 half-moves

# move score
1 Kb4 win in 3 half-moves
2 Kc4 win in 3 half-moves
3 Kd4 win in 3 half-moves
4 Kc6 win in 5 half-moves
5 Kb5 draw
6 Kb6 draw
7 Kd5 loss in 2 half-moves
8 Kd6 loss in 2 half-moves
9 Nf6 loss in 2 half-moves
10 Nf8 loss in 2 half-moves
11 Ng5 loss in 2 half-moves