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EGTB: win in 4 half-moves

# move score
1 Rb6 win in 3 half-moves
2 Ka3 draw
3 Rb3 draw
4 Rf1 draw
5 Rg1 draw
6 Rh1 draw
7 Ka5 loss in 2 half-moves
8 Kb4 loss in 2 half-moves
9 Kb5 loss in 2 half-moves
10 Kc5 loss in 2 half-moves
11 Kc6 loss in 2 half-moves
12 Kc7 loss in 2 half-moves
13 Kd5 loss in 2 half-moves
14 Kd7 loss in 2 half-moves
15 Ke5 loss in 2 half-moves
16 Ke6 loss in 2 half-moves
17 Ke7 loss in 2 half-moves
18 Ra1 loss in 2 half-moves
19 Rb2 loss in 2 half-moves
20 Rb4 loss in 2 half-moves
21 Rb5 loss in 2 half-moves
22 Rb7 loss in 2 half-moves
23 Rb8 loss in 2 half-moves
24 Rc1 loss in 2 half-moves
25 Rd1 loss in 2 half-moves
26 Re1 loss in 2 half-moves
27 Kb3 loss in 1 half-moves