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EGTB: win in 4 half-moves

# move score
1 Rg7 win in 3 half-moves
2 Ke8 draw
3 Kfg7 draw
4 Kgg7 draw
5 Kh7 draw
6 Kh8 draw
7 Ra1 draw
8 Rf1 draw
9 Rg2 draw
10 Rg3 draw
11 Rh1 draw
12 Ke7 loss in 2 half-moves
13 Kff7 loss in 2 half-moves
14 Kgf7 loss in 2 half-moves
15 Rb1 loss in 2 half-moves
16 Rc1 loss in 2 half-moves
17 Rd1 loss in 2 half-moves
18 Re1 loss in 2 half-moves
19 Rg4 loss in 2 half-moves
20 Rg5 loss in 2 half-moves
21 Rg6 loss in 2 half-moves