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

EGTB: win in 4 half-moves

# move score
1 Ra8 win in 3 half-moves
2 Ka5 draw
3 Ka8 draw
4 Kb8 draw
5 Kc7 draw
6 Kc8 draw
7 Kab6 loss in 2 half-moves
8 Kb5 loss in 2 half-moves
9 Kbb6 loss in 2 half-moves
10 Kc6 loss in 2 half-moves