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EGTB: win in 4 half-moves

# move score
1 Rg7 win in 3 half-moves
2 Rb1 draw
3 Rd1 draw
4 Re1 draw
5 Rf1 draw
6 Rg4 draw
7 Rg5 draw
8 Rg6 draw
9 Kd7 loss in 2 half-moves
10 Kd8 loss in 2 half-moves
11 Ke7 loss in 2 half-moves
12 Kef7 loss in 2 half-moves
13 Kef8 loss in 2 half-moves
14 Kg7 loss in 2 half-moves
15 Kgf7 loss in 2 half-moves
16 Kgf8 loss in 2 half-moves
17 Kh7 loss in 2 half-moves
18 Kh8 loss in 2 half-moves
19 Ra1 loss in 2 half-moves
20 Rc1 loss in 2 half-moves
21 Rg2 loss in 2 half-moves
22 Rg3 loss in 2 half-moves
23 Rh1 loss in 2 half-moves