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EGTB: win in 4 half-moves

# move score
1 Rg8 win in 3 half-moves
2 Ra8 draw
3 Rb8 draw
4 Rc1 draw
5 Rc3 draw
6 Rc4 draw
7 Rc5 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 Rc2 loss in 2 half-moves
18 Rc6 loss in 2 half-moves
19 Rc7 loss in 2 half-moves
20 Rd8 loss in 2 half-moves
21 Re8 loss in 2 half-moves