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

EGTB: win in 4 half-moves

# move score
1 Rh2 win in 3 half-moves
2 Rd8 draw
3 Re8 draw
4 Rf8 draw
5 Rg8 draw
6 Rh4 draw
7 Rh5 draw
8 Rh6 draw
9 Rh7 draw
10 Ra8 loss in 2 half-moves
11 Rb8 loss in 2 half-moves
12 Rc8 loss in 2 half-moves
13 Rh1 loss in 2 half-moves
14 Rh3 loss in 2 half-moves