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EGTB: win in 4 half-moves

# move score
1 Rg6 win in 3 half-moves
2 Kb6 draw
3 Kb7 draw
4 Kb8 draw
5 Kd5 draw
6 Ke5 draw
7 Kf5 draw
8 Ra1 draw
9 Rb1 draw
10 Rc1 draw
11 Rg4 draw
12 Rg5 draw
13 Rg7 draw
14 Rg8 draw
15 Ka6 loss in 2 half-moves
16 Ka8 loss in 2 half-moves
17 Kd3 loss in 2 half-moves
18 Kd4 loss in 2 half-moves
19 Ke3 loss in 2 half-moves
20 Kf3 loss in 2 half-moves
21 Kf4 loss in 2 half-moves
22 Rd1 loss in 2 half-moves
23 Re1 loss in 2 half-moves
24 Rf1 loss in 2 half-moves
25 Rg2 loss in 2 half-moves
26 Rg3 loss in 2 half-moves
27 Rh1 loss in 2 half-moves