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EGTB: win in 4 half-moves

# move score
1 Rg7 win in 3 half-moves
2 Kg5 draw
3 Kh5 draw
4 Ra1 draw
5 Rb1 draw
6 Rg5 draw
7 Kc6 loss in 2 half-moves
8 Kc7 loss in 2 half-moves
9 Kc8 loss in 2 half-moves
10 Kd6 loss in 2 half-moves
11 Kd8 loss in 2 half-moves
12 Ke6 loss in 2 half-moves
13 Ke7 loss in 2 half-moves
14 Ke8 loss in 2 half-moves
15 Kg3 loss in 2 half-moves
16 Kg4 loss in 2 half-moves
17 Kh3 loss in 2 half-moves
18 Rc1 loss in 2 half-moves
19 Rd1 loss in 2 half-moves
20 Re1 loss in 2 half-moves
21 Rf1 loss in 2 half-moves
22 Rg2 loss in 2 half-moves
23 Rg3 loss in 2 half-moves
24 Rg4 loss in 2 half-moves
25 Rg6 loss in 2 half-moves
26 Rg8 loss in 2 half-moves
27 Rh1 loss in 2 half-moves