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EGTB: win in 4 half-moves

# move score
1 Rg4 win in 3 half-moves
2 Ka3 draw
3 Kb3 draw
4 Ke4 draw
5 Ke6 draw
6 Kf4 draw
7 Kf5 draw
8 Kf6 draw
9 Rc2 draw
10 Rd2 draw
11 Re2 draw
12 Rf2 draw
13 Rg1 draw
14 Rg3 draw
15 Rg5 draw
16 Rh2 draw
17 Ka5 loss in 2 half-moves
18 Kb4 loss in 2 half-moves
19 Kb5 loss in 2 half-moves
20 Kd4 loss in 2 half-moves
21 Kd5 loss in 2 half-moves
22 Kd6 loss in 2 half-moves
23 Ra2 loss in 2 half-moves
24 Rb2 loss in 2 half-moves
25 Rg6 loss in 2 half-moves
26 Rg7 loss in 2 half-moves
27 Rg8 loss in 2 half-moves