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

EGTB: win in 4 half-moves

# move score
1 Kdd7 win in 3 half-moves
2 Kb6 win in 5 half-moves
3 Kb7 win in 5 half-moves
4 Kc6 win in 5 half-moves
5 Kcd7 win in 5 half-moves
6 Kd6 win in 5 half-moves
7 Ke7 win in 5 half-moves
8 Kb8 draw
9 Ke8 draw
10 Ra8 draw
11 Rb8 draw