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EGTB: win in 4 half-moves

# move score
1 Rg6 win in 3 half-moves
2 Ra4 draw
3 Rc4 draw
4 Rf4 draw
5 Rg3 draw
6 Rg5 draw
7 Rg7 draw
8 Rg8 draw
9 Kg6 loss in 2 half-moves
10 Kg7 loss in 2 half-moves
11 Kg8 loss in 2 half-moves
12 Kh6 loss in 2 half-moves
13 Kh8 loss in 2 half-moves
14 Rb4 loss in 2 half-moves
15 Rd4 loss in 2 half-moves
16 Re4 loss in 2 half-moves
17 Rg1 loss in 2 half-moves
18 Rg2 loss in 2 half-moves
19 Rh4 loss in 2 half-moves