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EGTB: win in 4 half-moves

# move score
1 Rb2 win in 3 half-moves
2 Rb3 win in 3 half-moves
3 Ka1 draw
4 Kb1 draw
5 Rb1 draw
6 Rb4 draw
7 Rb5 draw
8 Rb6 draw
9 Rc7 draw
10 Rg7 draw
11 Rh7 draw
12 Ka3 loss in 2 half-moves
13 Kb2 loss in 2 half-moves
14 Kb3 loss in 2 half-moves
15 Kf3 loss in 2 half-moves
16 Kf4 loss in 2 half-moves
17 Kf5 loss in 2 half-moves
18 Kg3 loss in 2 half-moves
19 Kg5 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 Ra7 loss in 2 half-moves
24 Rb8 loss in 2 half-moves
25 Rd7 loss in 2 half-moves
26 Re7 loss in 2 half-moves
27 Rf7 loss in 2 half-moves