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 Rb4 draw
5 Rb5 draw
6 Rb6 draw
7 Re8 draw
8 Rf8 draw
9 K6g7 loss in 2 half-moves
10 K6h7 loss in 2 half-moves
11 K8g7 loss in 2 half-moves
12 K8h7 loss in 2 half-moves
13 Kg5 loss in 2 half-moves
14 Kg6 loss in 2 half-moves
15 Kg8 loss in 2 half-moves
16 Kh5 loss in 2 half-moves
17 Rb2 loss in 2 half-moves
18 Rb3 loss in 2 half-moves
19 Rb7 loss in 2 half-moves
20 Rc8 loss in 2 half-moves
21 Rd8 loss in 2 half-moves