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EGTB: win in 4 half-moves

# move score
1 Rg6 win in 3 half-moves
2 Kf5 draw
3 Kf6 draw
4 Kg6 draw
5 Kh5 draw
6 Kh6 draw
7 Ra8 draw
8 Rg7 draw
9 Kf4 loss in 2 half-moves
10 Kg4 loss in 2 half-moves
11 Kh4 loss in 2 half-moves
12 Rb8 loss in 2 half-moves
13 Rc8 loss in 2 half-moves
14 Rd8 loss in 2 half-moves
15 Re8 loss in 2 half-moves
16 Rf8 loss in 2 half-moves
17 Rh8 loss in 2 half-moves