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

EGTB: draw

# move score
1 b4 draw
2 Ka8 draw
3 Kbb7 draw
4 Kc6 draw
5 Kcc8 draw
6 Ka7 loss in 4 half-moves
7 Kb6 loss in 4 half-moves
8 Kcb7 loss in 4 half-moves
9 Kd6 loss in 4 half-moves
10 Kd7 loss in 4 half-moves
11 Kd8 loss in 4 half-moves
12 Kbc8 loss in 3 half-moves