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EGTB: win in 4 half-moves

# move score
1 Rb7 win in 3 half-moves
2 Rb8 win in 3 half-moves
3 Kb5 draw
4 Kc5 draw
5 Kd5 draw
6 Ra1 draw
7 Rb5 draw
8 Rb6 draw
9 Rd1 draw
10 Re1 draw
11 Rf1 draw
12 Kb6 loss in 2 half-moves
13 Kb7 loss in 2 half-moves
14 Kc7 loss in 2 half-moves
15 Kd6 loss in 2 half-moves
16 Kd7 loss in 2 half-moves
17 Ke6 loss in 2 half-moves
18 Ke7 loss in 2 half-moves
19 Ke8 loss in 2 half-moves
20 Kf6 loss in 2 half-moves
21 Kf8 loss in 2 half-moves
22 Kg6 loss in 2 half-moves
23 Kg7 loss in 2 half-moves
24 Kg8 loss in 2 half-moves
25 Rb2 loss in 2 half-moves
26 Rb3 loss in 2 half-moves
27 Rb4 loss in 2 half-moves
28 Rc1 loss in 2 half-moves
29 Rg1 loss in 2 half-moves
30 Rh1 loss in 2 half-moves