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

EGTB: win in 16 half-moves

# move score
1 K7b7 win in 15 half-moves
2 K8b8 win in 15 half-moves
3 Kb6 win in 15 half-moves
4 K7b8 win in 17 half-moves
5 b3 loss in 4 half-moves
6 K8b7 loss in 4 half-moves
7 Kc6 loss in 4 half-moves
8 Nb6 loss in 4 half-moves
9 K7d7 loss in 2 half-moves
10 K7d8 loss in 2 half-moves
11 K8d7 loss in 2 half-moves
12 K8d8 loss in 2 half-moves
13 Kd6 loss in 2 half-moves