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EGTB: win in 4 half-moves

# move score
1 Ra7 win in 3 half-moves
2 Ra8 draw
3 Rb3 draw
4 Rbb7 draw
5 Rf7 draw
6 Rgf8 draw
7 Rh7 draw
8 Rh8 draw
9 Rbf8 loss in 10 half-moves
10 Rb1 loss in 2 half-moves
11 Rb2 loss in 2 half-moves
12 Rb4 loss in 2 half-moves
13 Rb5 loss in 2 half-moves
14 Rb6 loss in 2 half-moves
15 Rbc8 loss in 2 half-moves
16 Rbd8 loss in 2 half-moves
17 Rbe8 loss in 2 half-moves
18 Rc7 loss in 2 half-moves
19 Rd7 loss in 2 half-moves
20 Re7 loss in 2 half-moves
21 Rg1 loss in 2 half-moves
22 Rg2 loss in 2 half-moves
23 Rg3 loss in 2 half-moves
24 Rg4 loss in 2 half-moves
25 Rg5 loss in 2 half-moves
26 Rg6 loss in 2 half-moves
27 Rgb7 loss in 2 half-moves
28 Rgc8 loss in 2 half-moves
29 Rgd8 loss in 2 half-moves
30 Rge8 loss in 2 half-moves