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EGTB: win in 4 half-moves

# move score
1 Rb7 win in 3 half-moves
2 Kg8 draw
3 Kh8 draw
4 Rb3 draw
5 Rb4 draw
6 Rb5 draw
7 Rb6 draw
8 Rb8 draw
9 Rf2 draw
10 Rg2 draw
11 Rh2 draw
12 Kc5 loss in 2 half-moves
13 Kc6 loss in 2 half-moves
14 Kc7 loss in 2 half-moves
15 Kd5 loss in 2 half-moves
16 Kd7 loss in 2 half-moves
17 Ke5 loss in 2 half-moves
18 Ke6 loss in 2 half-moves
19 Ke7 loss in 2 half-moves
20 Kg6 loss in 2 half-moves
21 Kg7 loss in 2 half-moves
22 Kh6 loss in 2 half-moves
23 Ra2 loss in 2 half-moves
24 Rb1 loss in 2 half-moves
25 Rc2 loss in 2 half-moves
26 Rd2 loss in 2 half-moves
27 Re2 loss in 2 half-moves