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EGTB: win in 4 half-moves

# move score
1 Rb7 win in 3 half-moves
2 Kb8 draw
3 Kc8 draw
4 Kd8 draw
5 Rb8 draw
6 Rf3 draw
7 Rg3 draw
8 Rh3 draw
9 Kb6 loss in 2 half-moves
10 Kb7 loss in 2 half-moves
11 Kc6 loss in 2 half-moves
12 Kd6 loss in 2 half-moves
13 Kd7 loss in 2 half-moves
14 Kg5 loss in 2 half-moves
15 Kg6 loss in 2 half-moves
16 Kg7 loss in 2 half-moves
17 Kh5 loss in 2 half-moves
18 Kh7 loss in 2 half-moves
19 Ra3 loss in 2 half-moves
20 Rb1 loss in 2 half-moves
21 Rb2 loss in 2 half-moves
22 Rb4 loss in 2 half-moves
23 Rb5 loss in 2 half-moves
24 Rb6 loss in 2 half-moves
25 Rc3 loss in 2 half-moves
26 Rd3 loss in 2 half-moves
27 Re3 loss in 2 half-moves