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

EGTB: win in 4 half-moves

# move score
1 Kb5 win in 3 half-moves
2 Kb6 win in 3 half-moves
3 Kc5 win in 3 half-moves
4 Kb7 draw
5 Kc7 draw
6 Kd5 draw
7 Kd6 draw
8 Nb6 draw
9 Nb8 draw
10 Nf8 draw
11 Nc5 loss in 2 half-moves
12 Ne5 loss in 2 half-moves
13 Nf6 loss in 2 half-moves