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 Rb8 win in 3 half-moves
3 Rc8 win in 3 half-moves
4 Ng7 win in 9 half-moves
5 Nd6 win in 13 half-moves
6 Nf6 win in 19 half-moves
7 Nc7 draw