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

EGTB: win in 2 half-moves

# move score
1 Rg4 win in 1 half-moves
2 Ka4 draw
3 Ka5 draw
4 Kb5 draw
5 Kc4 draw
6 Kc5 draw
7 Re4 draw
8 Rf4 draw
9 Rh5 draw
10 Rh6 draw
11 Rh7 loss in 4 half-moves
12 Ka3 loss in 2 half-moves
13 Kb3 loss in 2 half-moves
14 Kc3 loss in 2 half-moves
15 Rc4 loss in 2 half-moves
16 Rd4 loss in 2 half-moves
17 Rh1 loss in 2 half-moves
18 Rh2 loss in 2 half-moves
19 Rh3 loss in 2 half-moves
20 Rh8 loss in 1 half-moves