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

EGTB: win in 4 half-moves

# move score
1 Rh8 win in 3 half-moves
2 Nb6 loss in 2 half-moves
3 Nb8 loss in 2 half-moves
4 Nc5 loss in 2 half-moves
5 Ne5 loss in 2 half-moves
6 Nf6 loss in 2 half-moves
7 Nf8 loss in 2 half-moves
8 Ra8 loss in 2 half-moves
9 Rb8 loss in 2 half-moves
10 Rc8 loss in 2 half-moves
11 Re8 loss in 2 half-moves
12 Rf8 loss in 2 half-moves
13 Rg8 loss in 2 half-moves