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

EGTB: win in 1 half-moves

# move score
1 a8=K win in 3 half-moves
2 a8=N draw
3 Na4 draw
4 Na6 draw
5 Nb3 draw
6 Nd3 draw
7 Nd7 draw
8 Nb7 loss in 4 half-moves
9 a8=B loss in 2 half-moves
10 a8=Q loss in 2 half-moves
11 a8=R loss in 2 half-moves
12 Ne4 loss in 2 half-moves
13 Ne6 loss in 1 half-moves