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EGTB: win in 4 half-moves

# move score
1 Kf7 win in 3 half-moves
2 Ra8 draw
3 Rb8 draw
4 Rc8 draw
5 Rf7 draw
6 Rg8 draw
7 Rh8 draw
8 Ke5 loss in 2 half-moves
9 Ke6 loss in 2 half-moves
10 Ke7 loss in 2 half-moves
11 Kf5 loss in 2 half-moves
12 Kh5 loss in 2 half-moves
13 Kh7 loss in 2 half-moves
14 Rd8 loss in 2 half-moves
15 Re8 loss in 2 half-moves
16 Kfg5 loss in 1 half-moves
17 Kfg6 loss in 1 half-moves
18 Kfg7 loss in 1 half-moves
19 Khg5 loss in 1 half-moves
20 Khg6 loss in 1 half-moves
21 Khg7 loss in 1 half-moves