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

EGTB: win in 2 half-moves

# move score
1 Ka7 win in 1 half-moves
2 Kab7 win in 1 half-moves
3 Kab8 win in 1 half-moves
4 Kc7 win in 1 half-moves
5 Kcb7 win in 1 half-moves
6 Kd7 win in 1 half-moves
7 Kd8 win in 1 half-moves
8 b3 loss in 4 half-moves
9 Kcb8 loss in 1 half-moves