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EGTB: win in 4 half-moves

# move score
1 Rg4 win in 3 half-moves
2 Nd1 draw
3 Nd3 draw
4 Rf8 draw
5 Rg5 draw
6 Rg6 draw
7 Rg7 draw
8 Rh8 draw
9 Na4 loss in 2 half-moves
10 Nc4 loss in 2 half-moves
11 Ra8 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 Rg1 loss in 2 half-moves
17 Rg2 loss in 2 half-moves
18 Rg3 loss in 2 half-moves