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 K6g7 draw
3 K8g7 draw
4 Rb4 draw
5 Rc4 draw
6 Rd4 draw
7 Re4 draw
8 Rg1 draw
9 Rg2 draw
10 Rg3 draw
11 Rg7 draw
12 Kg5 loss in 2 half-moves
13 Kg6 loss in 2 half-moves
14 Kg8 loss in 2 half-moves
15 Kh5 loss in 2 half-moves
16 Ra4 loss in 2 half-moves
17 Rf4 loss in 2 half-moves
18 Rg5 loss in 2 half-moves
19 Rg6 loss in 2 half-moves
20 Rh4 loss in 2 half-moves
21 K6h7 loss in 1 half-moves
22 K8h7 loss in 1 half-moves