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EGTB: win in 4 half-moves

# move score
1 Rg8 win in 3 half-moves
2 Ra3 draw
3 Rc3 draw
4 Rd3 draw
5 Re3 draw
6 Rg5 draw
7 Rg6 draw
8 Rg7 draw
9 Kb4 loss in 2 half-moves
10 Kb5 loss in 2 half-moves
11 Kb6 loss in 2 half-moves
12 Kc4 loss in 2 half-moves
13 Kc7 loss in 2 half-moves
14 Kc8 loss in 2 half-moves
15 Kcc6 loss in 2 half-moves
16 Kcd6 loss in 2 half-moves
17 Kd4 loss in 2 half-moves
18 Kd5 loss in 2 half-moves
19 Kd8 loss in 2 half-moves
20 Kdc6 loss in 2 half-moves
21 Kdd6 loss in 2 half-moves
22 Ke6 loss in 2 half-moves
23 Ke7 loss in 2 half-moves
24 Ke8 loss in 2 half-moves
25 Rb3 loss in 2 half-moves
26 Rf3 loss in 2 half-moves
27 Rg1 loss in 2 half-moves
28 Rg2 loss in 2 half-moves
29 Rg4 loss in 2 half-moves
30 Rh3 loss in 2 half-moves