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

EGTB: win in 4 half-moves

# move score
1 Kab6 win in 3 half-moves
2 Ka4 draw
3 Kaa6 draw
4 Kb4 draw
5 Kb5 draw
6 Kc8 draw
7 Ka8 loss in 2 half-moves
8 Kb8 loss in 2 half-moves
9 Kba6 loss in 2 half-moves
10 Kbb6 loss in 2 half-moves
11 Kc6 loss in 2 half-moves
12 Kc7 loss in 2 half-moves
13 Ra6 loss in 2 half-moves
14 Ra8 loss in 2 half-moves