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

EGTB: win in 8 half-moves

# move score
1 b4 win in 7 half-moves
2 Ka4 win in 7 half-moves
3 Kb4 win in 7 half-moves
4 Kb7 win in 13 half-moves
5 Kab6 loss in 4 half-moves
6 Kd5 loss in 4 half-moves
7 Ka6 loss in 3 half-moves
8 Kc5 loss in 3 half-moves
9 Kc7 loss in 3 half-moves
10 Kcb6 loss in 3 half-moves
11 Kd6 loss in 3 half-moves
12 Kd7 loss in 3 half-moves
13 Nb7 loss in 3 half-moves
14 Ne6 loss in 2 half-moves
15 Nf7 loss in 2 half-moves