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EGTB: win in 4 half-moves

# move score
1 Rg4 win in 3 half-moves
2 K1a2 draw
3 Ka4 draw
4 Kb4 draw
5 Ra8 draw
6 Rf8 draw
7 Rg3 draw
8 Rg5 draw
9 Rg6 draw
10 Rg7 draw
11 Rh8 draw
12 K1b2 loss in 2 half-moves
13 K3a2 loss in 2 half-moves
14 K3b2 loss in 2 half-moves
15 Kb1 loss in 2 half-moves
16 Kb3 loss in 2 half-moves
17 Rb8 loss in 2 half-moves
18 Rc8 loss in 2 half-moves
19 Rd8 loss in 2 half-moves
20 Re8 loss in 2 half-moves
21 Rg1 loss in 2 half-moves
22 Rg2 loss in 2 half-moves