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EGTB: win in 4 half-moves

# move score
1 Rg6 win in 3 half-moves
2 Rg8 win in 3 half-moves
3 Ra1 draw
4 Rd1 draw
5 Re1 draw
6 Rf1 draw
7 Rg4 draw
8 Rg5 draw
9 Rg7 draw
10 Kc6 loss in 2 half-moves
11 Kc7 loss in 2 half-moves
12 Kc8 loss in 2 half-moves
13 Kdd6 loss in 2 half-moves
14 Kdd8 loss in 2 half-moves
15 Kde6 loss in 2 half-moves
16 Kde8 loss in 2 half-moves
17 Ked6 loss in 2 half-moves
18 Ked8 loss in 2 half-moves
19 Kee6 loss in 2 half-moves
20 Kee8 loss in 2 half-moves
21 Kf6 loss in 2 half-moves
22 Kf7 loss in 2 half-moves
23 Kf8 loss in 2 half-moves
24 Rb1 loss in 2 half-moves
25 Rc1 loss in 2 half-moves
26 Rg2 loss in 2 half-moves
27 Rg3 loss in 2 half-moves
28 Rh1 loss in 2 half-moves