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EGTB: win in 4 half-moves

# move score
1 Rb7 win in 3 half-moves
2 Ra2 draw
3 Rb4 draw
4 Rb5 draw
5 Rb6 draw
6 Rb8 draw
7 Rf2 draw
8 Rg2 draw
9 Rh2 draw
10 Ke7 loss in 2 half-moves
11 Ke8 loss in 2 half-moves
12 Kf3 loss in 2 half-moves
13 Kf4 loss in 2 half-moves
14 Kf5 loss in 2 half-moves
15 Kf7 loss in 2 half-moves
16 Kg3 loss in 2 half-moves
17 Kg5 loss in 2 half-moves
18 Kg7 loss in 2 half-moves
19 Kg8 loss in 2 half-moves
20 Kh3 loss in 2 half-moves
21 Kh4 loss in 2 half-moves
22 Kh5 loss in 2 half-moves
23 Rb1 loss in 2 half-moves
24 Rb3 loss in 2 half-moves
25 Rc2 loss in 2 half-moves
26 Rd2 loss in 2 half-moves
27 Re2 loss in 2 half-moves