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EGTB: win in 4 half-moves

# move score
1 Rg7 win in 3 half-moves
2 Kd7 draw
3 Kd8 draw
4 Rb2 draw
5 Rb3 draw
6 Rb4 draw
7 Rd7 draw
8 Ke7 loss in 2 half-moves
9 Kf4 loss in 2 half-moves
10 Kf5 loss in 2 half-moves
11 Kf6 loss in 2 half-moves
12 Kf7 loss in 2 half-moves
13 Kf8 loss in 2 half-moves
14 Kg4 loss in 2 half-moves
15 Kg6 loss in 2 half-moves
16 Kh4 loss in 2 half-moves
17 Kh5 loss in 2 half-moves
18 Kh6 loss in 2 half-moves
19 Ra7 loss in 2 half-moves
20 Rb1 loss in 2 half-moves
21 Rb5 loss in 2 half-moves
22 Rb6 loss in 2 half-moves
23 Rb8 loss in 2 half-moves
24 Rc7 loss in 2 half-moves
25 Re7 loss in 2 half-moves
26 Rf7 loss in 2 half-moves
27 Rh7 loss in 2 half-moves