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EGTB: win in 4 half-moves

# move score
1 Rb4 win in 3 half-moves
2 Ra2 draw
3 Ra3 draw
4 Rb1 draw
5 Rbb3 draw
6 Rc2 draw
7 Rc3 draw
8 Rg1 draw
9 Rg4 draw
10 Rg5 draw
11 Rgb3 draw
12 Rgg2 draw
13 Rb5 loss in 2 half-moves
14 Rb6 loss in 2 half-moves
15 Rb7 loss in 2 half-moves
16 Rb8 loss in 2 half-moves
17 Rbg2 loss in 2 half-moves
18 Rd2 loss in 2 half-moves
19 Rd3 loss in 2 half-moves
20 Re2 loss in 2 half-moves
21 Re3 loss in 2 half-moves
22 Rf2 loss in 2 half-moves
23 Rf3 loss in 2 half-moves
24 Rg6 loss in 2 half-moves
25 Rg7 loss in 2 half-moves
26 Rg8 loss in 2 half-moves
27 Rh2 loss in 2 half-moves
28 Rh3 loss in 2 half-moves