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EGTB: win in 4 half-moves

# move score
1 Rg7 win in 3 half-moves
2 Ra1 draw
3 Ra3 draw
4 Rb1 draw
5 Rb3 draw
6 Rf1 draw
7 Rf3 draw
8 Rh1 draw
9 Rh3 draw
10 R1g2 loss in 4 half-moves
11 R3g2 loss in 4 half-moves
12 Rc1 loss in 2 half-moves
13 Rc3 loss in 2 half-moves
14 Rd1 loss in 2 half-moves
15 Rd3 loss in 2 half-moves
16 Re1 loss in 2 half-moves
17 Re3 loss in 2 half-moves
18 Rg4 loss in 2 half-moves
19 Rg5 loss in 2 half-moves
20 Rg6 loss in 2 half-moves
21 Rg8 loss in 2 half-moves