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 Rb7 draw
3 Rf7 draw
4 Rg7 draw
5 Rh1 draw
6 Rh3 draw
7 Ka2 loss in 2 half-moves
8 Ka4 loss in 2 half-moves
9 Kb2 loss in 2 half-moves
10 Kb3 loss in 2 half-moves
11 Kb4 loss in 2 half-moves
12 Ra7 loss in 2 half-moves
13 Rc7 loss in 2 half-moves
14 Rd7 loss in 2 half-moves
15 Re7 loss in 2 half-moves
16 Rh4 loss in 2 half-moves
17 Rh5 loss in 2 half-moves
18 Rh6 loss in 2 half-moves
19 Rh8 loss in 2 half-moves