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EGTB: win in 4 half-moves

# move score
1 Rf1 win in 3 half-moves
2 Kc1 draw
3 Ra8 draw
4 Re8 draw
5 Rf3 draw
6 Rf7 draw
7 Rg8 draw
8 Rh8 draw
9 Kaa2 loss in 2 half-moves
10 Kab2 loss in 2 half-moves
11 Kba2 loss in 2 half-moves
12 Kbb2 loss in 2 half-moves
13 Kc2 loss in 2 half-moves
14 Rb8 loss in 2 half-moves
15 Rc8 loss in 2 half-moves
16 Rd8 loss in 2 half-moves
17 Rf2 loss in 2 half-moves
18 Rf4 loss in 2 half-moves
19 Rf5 loss in 2 half-moves
20 Rf6 loss in 2 half-moves