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EGTB: win in 4 half-moves

# move score
1 Rg1 win in 3 half-moves
2 K2g3 draw
3 K4g3 draw
4 Ra7 draw
5 Rb7 draw
6 Rc7 draw
7 Rd7 draw
8 Rg2 draw
9 Rg3 draw
10 Rg4 draw
11 Rg8 draw
12 Ke1 loss in 2 half-moves
13 Ke2 loss in 2 half-moves
14 Ke4 loss in 2 half-moves
15 Ke5 loss in 2 half-moves
16 Kf1 loss in 2 half-moves
17 Kf5 loss in 2 half-moves
18 Kg1 loss in 2 half-moves
19 Kg2 loss in 2 half-moves
20 Kg4 loss in 2 half-moves
21 Kg5 loss in 2 half-moves
22 Re7 loss in 2 half-moves
23 Rf7 loss in 2 half-moves
24 Rg5 loss in 2 half-moves
25 Rg6 loss in 2 half-moves
26 Rh7 loss in 2 half-moves
27 K2e3 loss in 1 half-moves
28 K2f3 loss in 1 half-moves
29 K4e3 loss in 1 half-moves
30 K4f3 loss in 1 half-moves