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EGTB: win in 4 half-moves

# move score
1 Rg3 win in 3 half-moves
2 Rf8 draw
3 Rg4 draw
4 Rg5 draw
5 b7 loss in 2 half-moves
6 Ra8 loss in 2 half-moves
7 Rb8 loss in 2 half-moves
8 Rc8 loss in 2 half-moves
9 Rd8 loss in 2 half-moves
10 Re8 loss in 2 half-moves
11 Rg1 loss in 2 half-moves
12 Rg2 loss in 2 half-moves
13 Rg6 loss in 2 half-moves
14 Rg7 loss in 2 half-moves
15 Rh8 loss in 2 half-moves