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EGTB: win in 20 half-moves

# move score
1 Rb8 win in 19 half-moves
2 Ra4 draw
3 Rb1 draw
4 Rb5 draw
5 Rb6 draw
6 Rb7 draw
7 Re4 draw
8 Rf4 draw
9 Rg4 draw
10 Ke6 loss in 2 half-moves
11 Ke7 loss in 2 half-moves
12 Ke8 loss in 2 half-moves
13 Kf6 loss in 2 half-moves
14 Kf8 loss in 2 half-moves
15 Kfg7 loss in 2 half-moves
16 Kfg8 loss in 2 half-moves
17 Kg6 loss in 2 half-moves
18 Kh7 loss in 2 half-moves
19 Khg7 loss in 2 half-moves
20 Khg8 loss in 2 half-moves
21 Rb2 loss in 2 half-moves
22 Rb3 loss in 2 half-moves
23 Rc4 loss in 2 half-moves
24 Rd4 loss in 2 half-moves
25 Rh4 loss in 2 half-moves