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

EGTB: win in 4 half-moves

# move score
1 Rg7 win in 3 half-moves
2 Rb2 draw
3 Rb3 draw
4 Rb4 draw
5 Rb5 draw
6 Rc7 draw
7 Rd7 draw
8 Re7 draw
9 Rf7 draw
10 K6g6 loss in 2 half-moves
11 K6g7 loss in 2 half-moves
12 K7g6 loss in 2 half-moves
13 K7g7 loss in 2 half-moves
14 Kg5 loss in 2 half-moves
15 Kg8 loss in 2 half-moves
16 Kh5 loss in 2 half-moves
17 Kh8 loss in 2 half-moves
18 Ra7 loss in 2 half-moves
19 Rb1 loss in 2 half-moves
20 Rb6 loss in 2 half-moves
21 Rb8 loss in 2 half-moves