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EGTB: win in 4 half-moves

# move score
1 Rg8 win in 3 half-moves
2 Rb2 draw
3 Rb3 draw
4 Rb7 draw
5 Rf8 draw
6 Rh8 draw
7 Kg3 loss in 2 half-moves
8 Kg4 loss in 2 half-moves
9 Kg5 loss in 2 half-moves
10 Kh3 loss in 2 half-moves
11 Kh5 loss in 2 half-moves
12 Ra8 loss in 2 half-moves
13 Rb1 loss in 2 half-moves
14 Rb4 loss in 2 half-moves
15 Rb5 loss in 2 half-moves
16 Rb6 loss in 2 half-moves
17 Rc8 loss in 2 half-moves
18 Rd8 loss in 2 half-moves
19 Re8 loss in 2 half-moves