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EGTB: win in 4 half-moves

# move score
1 Rg7 win in 3 half-moves
2 Rf2 draw
3 Rf3 draw
4 Rf4 draw
5 Rfb7 draw
6 Rfc7 draw
7 Ra1 loss in 2 half-moves
8 Ra2 loss in 2 half-moves
9 Ra3 loss in 2 half-moves
10 Ra4 loss in 2 half-moves
11 Ra5 loss in 2 half-moves
12 Ra8 loss in 2 half-moves
13 Rab7 loss in 2 half-moves
14 Rac7 loss in 2 half-moves
15 Rad7 loss in 2 half-moves
16 Rae7 loss in 2 half-moves
17 Raf6 loss in 2 half-moves
18 Rb6 loss in 2 half-moves
19 Rc6 loss in 2 half-moves
20 Rd6 loss in 2 half-moves
21 Re6 loss in 2 half-moves
22 Rf1 loss in 2 half-moves
23 Rf5 loss in 2 half-moves
24 Rf8 loss in 2 half-moves
25 Rfd7 loss in 2 half-moves
26 Rfe7 loss in 2 half-moves
27 Rff6 loss in 2 half-moves
28 Rg6 loss in 2 half-moves
29 Rh6 loss in 2 half-moves
30 Rh7 loss in 2 half-moves