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EGTB: win in 4 half-moves

# move score
1 Rb6 win in 3 half-moves
2 Ka8 draw
3 Kb8 draw
4 Rb8 draw
5 Rg2 draw
6 Rh2 draw
7 Ka6 loss in 2 half-moves
8 Kb6 loss in 2 half-moves
9 Kb7 loss in 2 half-moves
10 Kd5 loss in 2 half-moves
11 Kd6 loss in 2 half-moves
12 Kd7 loss in 2 half-moves
13 Ke5 loss in 2 half-moves
14 Ke7 loss in 2 half-moves
15 Kf5 loss in 2 half-moves
16 Kf6 loss in 2 half-moves
17 Kf7 loss in 2 half-moves
18 Ra2 loss in 2 half-moves
19 Rb1 loss in 2 half-moves
20 Rb3 loss in 2 half-moves
21 Rb4 loss in 2 half-moves
22 Rb5 loss in 2 half-moves
23 Rb7 loss in 2 half-moves
24 Rc2 loss in 2 half-moves
25 Rd2 loss in 2 half-moves
26 Re2 loss in 2 half-moves
27 Rf2 loss in 2 half-moves