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

EGTB: win in 12 half-moves

# move score
1 Kb6 win in 11 half-moves
2 Kb7 win in 11 half-moves
3 b4 loss in 4 half-moves
4 Ka7 loss in 4 half-moves
5 Kf5 loss in 4 half-moves
6 Kf7 loss in 4 half-moves
7 Kg5 loss in 4 half-moves
8 Kg6 loss in 4 half-moves
9 Kg7 loss in 4 half-moves
10 Ng6 loss in 4 half-moves
11 Ka5 loss in 3 half-moves
12 Ke5 loss in 2 half-moves
13 Ke6 loss in 2 half-moves
14 Ke7 loss in 2 half-moves
15 Nf7 loss in 2 half-moves