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EGTB: win in 4 half-moves

# move score
1 Rb6 win in 3 half-moves
2 Ka6 draw
3 Ka7 draw
4 Ka8 draw
5 Ra6 draw
6 Rc6 draw
7 Rd6 draw
8 Re6 draw
9 Rf6 draw
10 Rg5 draw
11 Rg7 draw
12 Rg8 draw
13 Kb1 loss in 2 half-moves
14 Kb2 loss in 2 half-moves
15 Kb3 loss in 2 half-moves
16 Kb6 loss in 2 half-moves
17 Kb8 loss in 2 half-moves
18 Kc1 loss in 2 half-moves
19 Kc3 loss in 2 half-moves
20 Kc6 loss in 2 half-moves
21 Kc7 loss in 2 half-moves
22 Kc8 loss in 2 half-moves
23 Kd1 loss in 2 half-moves
24 Kd2 loss in 2 half-moves
25 Kd3 loss in 2 half-moves
26 Rg1 loss in 2 half-moves
27 Rg2 loss in 2 half-moves
28 Rg3 loss in 2 half-moves
29 Rg4 loss in 2 half-moves
30 Rh6 loss in 2 half-moves