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

EGTB: win in 12 half-moves

# move score
1 b4 win in 11 half-moves
2 Ka6 win in 17 half-moves
3 Kb6 win in 17 half-moves
4 Ka4 loss in 4 half-moves
5 Kb4 loss in 4 half-moves
6 Nc5 loss in 4 half-moves
7 Kb8 loss in 3 half-moves
8 Kc7 loss in 3 half-moves
9 Kd7 loss in 3 half-moves
10 Kd8 loss in 3 half-moves
11 Nd6 loss in 2 half-moves
12 Nd8 loss in 2 half-moves