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

EGTB: win in 2 half-moves

# move score
1 b4 win in 1 half-moves
2 Ka5 loss in 2 half-moves
3 Ka6 loss in 2 half-moves
4 Kaa7 loss in 2 half-moves
5 Kab7 loss in 2 half-moves
6 Kb8 loss in 2 half-moves
7 Kba7 loss in 2 half-moves
8 Kbb7 loss in 2 half-moves
9 Kc5 loss in 2 half-moves
10 Kc6 loss in 2 half-moves
11 Kc7 loss in 2 half-moves