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EGTB: win in 4 half-moves

# move score
1 Rf2 win in 3 half-moves
2 Rc7 draw
3 Rd7 draw
4 Re2 draw
5 Re8 draw
6 Rf8 draw
7 Rg7 draw
8 Rh7 draw
9 Ra7 loss in 2 half-moves
10 Rb7 loss in 2 half-moves
11 Re1 loss in 2 half-moves
12 Re3 loss in 2 half-moves
13 Re4 loss in 2 half-moves
14 Re5 loss in 2 half-moves
15 Re6 loss in 2 half-moves
16 Rf1 loss in 2 half-moves
17 Rf3 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