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EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Kc6 draw
3 Kd6 draw
4 Ra1 draw
5 Ra4 draw
6 Ra7 draw
7 Rg6 draw
8 Rh6 draw
9 Ka1 loss in 2 half-moves
10 Ka2 loss in 2 half-moves
11 Kb2 loss in 2 half-moves
12 Kb7 loss in 2 half-moves
13 Kb8 loss in 2 half-moves
14 Kc1 loss in 2 half-moves
15 Kc2 loss in 2 half-moves
16 Kc8 loss in 2 half-moves
17 Kd7 loss in 2 half-moves
18 Kd8 loss in 2 half-moves
19 Ra2 loss in 2 half-moves
20 Ra3 loss in 2 half-moves
21 Ra5 loss in 2 half-moves
22 Ra8 loss in 2 half-moves
23 Rb6 loss in 2 half-moves
24 Rc6 loss in 2 half-moves
25 Rd6 loss in 2 half-moves
26 Re6 loss in 2 half-moves
27 Rf6 loss in 2 half-moves