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EGTB: win in 4 half-moves

# move score
1 Rb6 win in 3 half-moves
2 Ra1 draw
3 Ra2 draw
4 Rb3 draw
5 Rb4 draw
6 Rb5 draw
7 Rbb2 draw
8 Rbg1 draw
9 Re1 draw
10 Rgg1 draw
11 Rh1 draw
12 Ne2 loss in 2 half-moves
13 Ne4 loss in 2 half-moves
14 Nf1 loss in 2 half-moves
15 Nf5 loss in 2 half-moves
16 Nh1 loss in 2 half-moves
17 Nh5 loss in 2 half-moves
18 Rb7 loss in 2 half-moves
19 Rb8 loss in 2 half-moves
20 Rc1 loss in 2 half-moves
21 Rc2 loss in 2 half-moves
22 Rd1 loss in 2 half-moves
23 Rd2 loss in 2 half-moves
24 Re2 loss in 2 half-moves
25 Rf1 loss in 2 half-moves
26 Rf2 loss in 2 half-moves
27 Rgb2 loss in 2 half-moves
28 Rh2 loss in 2 half-moves