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EGTB: win in 4 half-moves

# move score
1 Rg7 win in 3 half-moves
2 Rb1 draw
3 Rb3 draw
4 Rb4 draw
5 Rb5 draw
6 Rc7 draw
7 Rd7 draw
8 Re7 draw
9 Rf7 draw
10 Rh7 draw
11 Kc5 loss in 2 half-moves
12 Kc6 loss in 2 half-moves
13 Kc7 loss in 2 half-moves
14 Kd5 loss in 2 half-moves
15 Kd7 loss in 2 half-moves
16 Ke5 loss in 2 half-moves
17 Ke6 loss in 2 half-moves
18 Ke7 loss in 2 half-moves
19 Kg3 loss in 2 half-moves
20 Kg4 loss in 2 half-moves
21 Kg5 loss in 2 half-moves
22 Kh3 loss in 2 half-moves
23 Kh5 loss in 2 half-moves
24 Ra7 loss in 2 half-moves
25 Rb2 loss in 2 half-moves
26 Rb6 loss in 2 half-moves
27 Rb8 loss in 2 half-moves