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EGTB: win in 4 half-moves

# move score
1 Rg8 win in 3 half-moves
2 Ra8 draw
3 Rb4 draw
4 Rb5 draw
5 Rb6 draw
6 Rb7 draw
7 Re8 draw
8 Rf8 draw
9 Rh8 draw
10 Kf1 loss in 2 half-moves
11 Kf2 loss in 2 half-moves
12 Kf3 loss in 2 half-moves
13 Kg1 loss in 2 half-moves
14 Kg3 loss in 2 half-moves
15 Kg4 loss in 2 half-moves
16 Kg5 loss in 2 half-moves
17 Kg6 loss in 2 half-moves
18 Kh1 loss in 2 half-moves
19 Kh2 loss in 2 half-moves
20 Kh3 loss in 2 half-moves
21 Kh4 loss in 2 half-moves
22 Kh6 loss in 2 half-moves
23 Rb1 loss in 2 half-moves
24 Rb2 loss in 2 half-moves
25 Rb3 loss in 2 half-moves
26 Rc8 loss in 2 half-moves
27 Rd8 loss in 2 half-moves