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EGTB: win in 4 half-moves

# move score
1 Rb3 win in 3 half-moves
2 Rf7 win in 3 half-moves
3 Kc1 draw
4 Kc2 draw
5 Kd2 draw
6 Ke1 draw
7 Ra3 draw
8 Ra8 draw
9 Raa7 draw
10 Rab1 draw
11 Rb8 draw
12 Rba7 draw
13 Rbb1 draw
14 Ke2 loss in 2 half-moves
15 Ra2 loss in 2 half-moves
16 Ra4 loss in 2 half-moves
17 Ra5 loss in 2 half-moves
18 Ra6 loss in 2 half-moves
19 Rb2 loss in 2 half-moves
20 Rb4 loss in 2 half-moves
21 Rb5 loss in 2 half-moves
22 Rb6 loss in 2 half-moves
23 Rc1 loss in 2 half-moves
24 Rc7 loss in 2 half-moves
25 Rd7 loss in 2 half-moves
26 Re7 loss in 2 half-moves
27 Rg7 loss in 2 half-moves
28 Rh7 loss in 2 half-moves