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EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Kb6 draw
3 Kc6 draw
4 Kd6 draw
5 Ra4 draw
6 Rb1 draw
7 Rb6 draw
8 Rb7 draw
9 Rd4 draw
10 Re4 draw
11 Rf4 draw
12 Kb7 loss in 2 half-moves
13 Kb8 loss in 2 half-moves
14 Kc8 loss in 2 half-moves
15 Kd7 loss in 2 half-moves
16 Kd8 loss in 2 half-moves
17 Ke7 loss in 2 half-moves
18 Ke8 loss in 2 half-moves
19 Kf7 loss in 2 half-moves
20 Kg7 loss in 2 half-moves
21 Kg8 loss in 2 half-moves
22 Rb2 loss in 2 half-moves
23 Rb3 loss in 2 half-moves
24 Rb5 loss in 2 half-moves
25 Rc4 loss in 2 half-moves
26 Rg4 loss in 2 half-moves
27 Rh4 loss in 2 half-moves