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EGTB: win in 4 half-moves

# move score
1 Rg7 win in 3 half-moves
2 Ra1 draw
3 Ra2 draw
4 Rb7 draw
5 Rbb2 draw
6 Rf1 draw
7 Rf2 draw
8 Rgg1 draw
9 Rh1 draw
10 Rh2 draw
11 Rbg1 loss in 4 half-moves
12 Rb3 loss in 2 half-moves
13 Rb4 loss in 2 half-moves
14 Rb5 loss in 2 half-moves
15 Rb6 loss in 2 half-moves
16 Rb8 loss in 2 half-moves
17 Rc1 loss in 2 half-moves
18 Rc2 loss in 2 half-moves
19 Rd1 loss in 2 half-moves
20 Rd2 loss in 2 half-moves
21 Re1 loss in 2 half-moves
22 Re2 loss in 2 half-moves
23 Rg3 loss in 2 half-moves
24 Rg4 loss in 2 half-moves
25 Rg5 loss in 2 half-moves
26 Rg6 loss in 2 half-moves
27 Rg8 loss in 2 half-moves
28 Rgb2 loss in 2 half-moves