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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Re8 draw
3 Rf8 draw
4 Rg1 draw
5 Rg2 draw
6 Rg3 draw
7 Rg4 draw
8 Rh8 draw
9 Ra8 loss in 2 half-moves
10 Rc8 loss in 2 half-moves
11 Rd8 loss in 2 half-moves
12 Rg5 loss in 2 half-moves
13 Rg6 loss in 2 half-moves
14 Rg7 loss in 2 half-moves