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

EGTB: win in 4 half-moves

# move score
1 Rg8 win in 3 half-moves
2 Ra8 draw
3 Rb1 draw
4 Rb5 draw
5 Rb6 draw
6 Rb7 draw
7 Re8 draw
8 Rf8 draw
9 Rh8 draw
10 K3g3 loss in 2 half-moves
11 K3g4 loss in 2 half-moves
12 K4g3 loss in 2 half-moves
13 K4g4 loss in 2 half-moves
14 Kg2 loss in 2 half-moves
15 Kg5 loss in 2 half-moves
16 Kh2 loss in 2 half-moves
17 Kh5 loss in 2 half-moves
18 Rb2 loss in 2 half-moves
19 Rb3 loss in 2 half-moves
20 Rb4 loss in 2 half-moves
21 Rc8 loss in 2 half-moves
22 Rd8 loss in 2 half-moves