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EGTB: win in 4 half-moves

# move score
1 Rc6 win in 3 half-moves
2 Rg7 draw
3 Rg8 draw
4 Rh6 draw
5 Ra6 loss in 2 half-moves
6 Rb6 loss in 2 half-moves
7 Rd6 loss in 2 half-moves
8 Re6 loss in 2 half-moves
9 Rf6 loss in 2 half-moves
10 Rg1 loss in 2 half-moves
11 Rg2 loss in 2 half-moves
12 Rg3 loss in 2 half-moves
13 Rg4 loss in 2 half-moves
14 Rg5 loss in 2 half-moves