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 Kc5 win in 9 half-moves
3 Kaa5 loss in 4 half-moves
4 Kc6 loss in 4 half-moves
5 Kba5 loss in 3 half-moves
6 Nb1 loss in 3 half-moves
7 Kaa7 loss in 2 half-moves
8 Kab7 loss in 2 half-moves
9 Kba7 loss in 2 half-moves
10 Kbb7 loss in 2 half-moves
11 Kc7 loss in 2 half-moves
12 Nc2 loss in 2 half-moves
13 Nc4 loss in 2 half-moves