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EGTB: win in 4 half-moves

# move score
1 Rg2 win in 3 half-moves
2 Ra8 draw
3 Rc8 draw
4 Rd8 draw
5 Re8 draw
6 Rg1 draw
7 Rg3 draw
8 Rg4 draw
9 Kb3 loss in 2 half-moves
10 Kb4 loss in 2 half-moves
11 Kb5 loss in 2 half-moves
12 Kc3 loss in 2 half-moves
13 Kc5 loss in 2 half-moves
14 Kcd3 loss in 2 half-moves
15 Kcd4 loss in 2 half-moves
16 Kd2 loss in 2 half-moves
17 Kd5 loss in 2 half-moves
18 Ke2 loss in 2 half-moves
19 Ke4 loss in 2 half-moves
20 Ked3 loss in 2 half-moves
21 Ked4 loss in 2 half-moves
22 Kf2 loss in 2 half-moves
23 Kf3 loss in 2 half-moves
24 Kf4 loss in 2 half-moves
25 Rb8 loss in 2 half-moves
26 Rf8 loss in 2 half-moves
27 Rg5 loss in 2 half-moves
28 Rg6 loss in 2 half-moves
29 Rg7 loss in 2 half-moves
30 Rh8 loss in 2 half-moves