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EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Ka2 draw
3 Ka5 draw
4 Ra8 draw
5 Rc8 draw
6 Rg1 draw
7 Rg5 draw
8 Rg6 draw
9 Rg7 draw
10 Rh8 draw
11 K3b3 loss in 2 half-moves
12 K3b4 loss in 2 half-moves
13 K4b3 loss in 2 half-moves
14 K4b4 loss in 2 half-moves
15 Kb2 loss in 2 half-moves
16 Kb5 loss in 2 half-moves
17 Rd8 loss in 2 half-moves
18 Re8 loss in 2 half-moves
19 Rf8 loss in 2 half-moves
20 Rg2 loss in 2 half-moves
21 Rg3 loss in 2 half-moves
22 Rg4 loss in 2 half-moves