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

EGTB: win in 4 half-moves

# move score
1 b2 win in 3 half-moves
2 Ka6 draw
3 Ka7 draw
4 Kb6 draw
5 Kbb8 draw
6 Kcc7 draw
7 Ka8 loss in 4 half-moves
8 Kc6 loss in 4 half-moves
9 Kcb8 loss in 4 half-moves
10 Kd7 loss in 4 half-moves
11 Kd8 loss in 4 half-moves
12 Kbc7 loss in 3 half-moves