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EGTB: win in 20 half-moves

# move score
1 Rg8 win in 19 half-moves
2 Ra4 draw
3 Rc4 draw
4 Rg5 draw
5 Rg6 draw
6 Rg7 draw
7 g3 loss in 2 half-moves
8 Rb4 loss in 2 half-moves
9 Rd4 loss in 2 half-moves
10 Re4 loss in 2 half-moves
11 Rf4 loss in 2 half-moves
12 Rg3 loss in 2 half-moves
13 Rh4 loss in 2 half-moves