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EGTB: win in 4 half-moves

# move score
1 Rg6 win in 3 half-moves
2 Rg7 win in 3 half-moves
3 Kc8 draw
4 Kd8 draw
5 Ke8 draw
6 Ra2 draw
7 Rb2 draw
8 Rc2 draw
9 Rf2 draw
10 Rg1 draw
11 Rg8 draw
12 Ka5 loss in 2 half-moves
13 Ka7 loss in 2 half-moves
14 Kb5 loss in 2 half-moves
15 Kb6 loss in 2 half-moves
16 Kb7 loss in 2 half-moves
17 Kc6 loss in 2 half-moves
18 Kc7 loss in 2 half-moves
19 Kd6 loss in 2 half-moves
20 Ke6 loss in 2 half-moves
21 Ke7 loss in 2 half-moves
22 Rd2 loss in 2 half-moves
23 Re2 loss in 2 half-moves
24 Rg3 loss in 2 half-moves
25 Rg4 loss in 2 half-moves
26 Rg5 loss in 2 half-moves
27 Rh2 loss in 2 half-moves