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EGTB: win in 4 half-moves

# move score
1 Rb2 win in 3 half-moves
2 Rd2 win in 3 half-moves
3 Ra2 draw
4 Rc2 draw
5 Re2 draw
6 Rf2 draw
7 Rg6 draw
8 Rg7 draw
9 Rg8 draw
10 Kb3 loss in 2 half-moves
11 Kb4 loss in 2 half-moves
12 Kb5 loss in 2 half-moves
13 Kb7 loss in 2 half-moves
14 Kb8 loss in 2 half-moves
15 Kc3 loss in 2 half-moves
16 Kc5 loss in 2 half-moves
17 Kc7 loss in 2 half-moves
18 Kd3 loss in 2 half-moves
19 Kd4 loss in 2 half-moves
20 Kd5 loss in 2 half-moves
21 Kd7 loss in 2 half-moves
22 Kd8 loss in 2 half-moves
23 Rg1 loss in 2 half-moves
24 Rg3 loss in 2 half-moves
25 Rg4 loss in 2 half-moves
26 Rg5 loss in 2 half-moves
27 Rh2 loss in 2 half-moves