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EGTB: win in 4 half-moves

# move score
1 Rg8 win in 3 half-moves
2 Ra2 draw
3 Ra5 draw
4 Ra6 draw
5 Ra7 draw
6 Rd8 draw
7 Re8 draw
8 Rf8 draw
9 Kg3 loss in 2 half-moves
10 Kg4 loss in 2 half-moves
11 Kg5 loss in 2 half-moves
12 Kg7 loss in 2 half-moves
13 Kg8 loss in 2 half-moves
14 Kh3 loss in 2 half-moves
15 Kh5 loss in 2 half-moves
16 Kh7 loss in 2 half-moves
17 Ra1 loss in 2 half-moves
18 Ra3 loss in 2 half-moves
19 Ra4 loss in 2 half-moves
20 Rb8 loss in 2 half-moves
21 Rc8 loss in 2 half-moves