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EGTB: win in 4 half-moves

# move score
1 Rg1 win in 3 half-moves
2 Rg4 win in 3 half-moves
3 Ra8 draw
4 Rd8 draw
5 Re8 draw
6 Rf8 draw
7 Rg2 draw
8 Rg3 draw
9 Rg5 draw
10 Kb2 loss in 2 half-moves
11 Kb3 loss in 2 half-moves
12 Kb4 loss in 2 half-moves
13 Kc2 loss in 2 half-moves
14 Kc4 loss in 2 half-moves
15 Kcd2 loss in 2 half-moves
16 Kcd3 loss in 2 half-moves
17 Kd1 loss in 2 half-moves
18 Kd4 loss in 2 half-moves
19 Ke1 loss in 2 half-moves
20 Ke3 loss in 2 half-moves
21 Ked2 loss in 2 half-moves
22 Ked3 loss in 2 half-moves
23 Kf1 loss in 2 half-moves
24 Kf2 loss in 2 half-moves
25 Kf3 loss in 2 half-moves
26 Rb8 loss in 2 half-moves
27 Rc8 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