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

EGTB: draw

# move score
1 b4 draw
2 Ka7 draw
3 Kab7 draw
4 Kb6 draw
5 Kb8 draw
6 Kc7 draw
7 Kd7 draw
8 Kd8 draw
9 Kcb7 loss in 4 half-moves
10 Ka5 loss in 3 half-moves