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EGTB: win in 4 half-moves

# move score
1 Rg4 win in 3 half-moves
2 Ka1 draw
3 Ka4 draw
4 Ra8 draw
5 Rf8 draw
6 Rg5 draw
7 Rg6 draw
8 Rg7 draw
9 Rh8 draw
10 K2b2 loss in 2 half-moves
11 K2b3 loss in 2 half-moves
12 K3b2 loss in 2 half-moves
13 K3b3 loss in 2 half-moves
14 Kb1 loss in 2 half-moves
15 Kb4 loss in 2 half-moves
16 Rb8 loss in 2 half-moves
17 Rc8 loss in 2 half-moves
18 Rd8 loss in 2 half-moves
19 Re8 loss in 2 half-moves
20 Rg1 loss in 2 half-moves
21 Rg2 loss in 2 half-moves
22 Rg3 loss in 2 half-moves