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

EGTB: win in 10 half-moves

# move score
1 b4 win in 9 half-moves
2 Ka4 win in 13 half-moves
3 Kb4 win in 13 half-moves
4 Ka6 win in 15 half-moves
5 Kab6 win in 15 half-moves
6 Na7 win in 19 half-moves
7 Nb8 win in 21 half-moves
8 Kb7 loss in 3 half-moves
9 Kb8 loss in 3 half-moves
10 Kc8 loss in 3 half-moves
11 Kcb6 loss in 3 half-moves
12 Kd6 loss in 3 half-moves
13 Kd7 loss in 3 half-moves
14 Kd8 loss in 3 half-moves
15 Nb4 loss in 2 half-moves
16 Nd4 loss in 2 half-moves
17 Nd8 loss in 2 half-moves
18 Ne5 loss in 2 half-moves
19 Ne7 loss in 2 half-moves