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EGTB: win in 4 half-moves

# move score
1 Rg8 win in 3 half-moves
2 Rb2 draw
3 Rb4 draw
4 Rb5 draw
5 Rb6 draw
6 Rd8 draw
7 Re8 draw
8 Rf8 draw
9 Rh8 draw
10 Kc5 loss in 2 half-moves
11 Kc6 loss in 2 half-moves
12 Kc7 loss in 2 half-moves
13 Kd5 loss in 2 half-moves
14 Kd7 loss in 2 half-moves
15 Ke5 loss in 2 half-moves
16 Ke6 loss in 2 half-moves
17 Ke7 loss in 2 half-moves
18 Kg5 loss in 2 half-moves
19 Kg6 loss in 2 half-moves
20 Kg7 loss in 2 half-moves
21 Kh5 loss in 2 half-moves
22 Kh7 loss in 2 half-moves
23 Ra8 loss in 2 half-moves
24 Rb1 loss in 2 half-moves
25 Rb3 loss in 2 half-moves
26 Rb7 loss in 2 half-moves
27 Rc8 loss in 2 half-moves