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 Kg3 draw
3 Kg4 draw
4 Kg5 draw
5 Kg7 draw
6 Kg8 draw
7 Kh3 draw
8 Kh5 draw
9 Kh7 draw
10 Rc1 draw
11 Rc5 draw
12 Rc6 draw
13 Rc7 draw
14 Rd8 draw
15 Re8 draw
16 Rf8 draw
17 Ra8 loss in 2 half-moves
18 Rb8 loss in 2 half-moves
19 Rc2 loss in 2 half-moves
20 Rc3 loss in 2 half-moves
21 Rc4 loss in 2 half-moves