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EGTB: win in 4 half-moves

# move score
1 Kb7 win in 3 half-moves
2 Ka5 draw
3 Ka7 draw
4 Kf6 draw
5 Ra8 draw
6 Rc8 draw
7 Rg8 draw
8 Rh8 draw
9 Kb5 loss in 2 half-moves
10 Kb6 loss in 2 half-moves
11 Ke6 loss in 2 half-moves
12 Ke7 loss in 2 half-moves
13 Ke8 loss in 2 half-moves
14 Kg6 loss in 2 half-moves
15 Kg7 loss in 2 half-moves
16 Kg8 loss in 2 half-moves
17 Rb8 loss in 2 half-moves
18 Rd8 loss in 2 half-moves
19 Re8 loss in 2 half-moves