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EGTB: win in 4 half-moves

# move score
1 Rg8 win in 3 half-moves
2 Rb2 draw
3 Rb6 draw
4 Rb7 draw
5 Rd8 draw
6 Re8 draw
7 Rf8 draw
8 Rh8 draw
9 Kg4 loss in 2 half-moves
10 Kg5 loss in 2 half-moves
11 Kg6 loss in 2 half-moves
12 Kh4 loss in 2 half-moves
13 Kh6 loss in 2 half-moves
14 Ra8 loss in 2 half-moves
15 Rb1 loss in 2 half-moves
16 Rb3 loss in 2 half-moves
17 Rb4 loss in 2 half-moves
18 Rb5 loss in 2 half-moves
19 Rc8 loss in 2 half-moves