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EGTB: win in 4 half-moves

# move score
1 Rf7 win in 3 half-moves
2 Rb2 draw
3 Rc2 draw
4 Rd2 draw
5 Re2 draw
6 Rf1 draw
7 Rf5 draw
8 Rf6 draw
9 Ke7 loss in 2 half-moves
10 Ke8 loss in 2 half-moves
11 Kf7 loss in 2 half-moves
12 Kfg7 loss in 2 half-moves
13 Kfg8 loss in 2 half-moves
14 Kh7 loss in 2 half-moves
15 Khg7 loss in 2 half-moves
16 Khg8 loss in 2 half-moves
17 Ra2 loss in 2 half-moves
18 Rf3 loss in 2 half-moves
19 Rf4 loss in 2 half-moves
20 Rg2 loss in 2 half-moves
21 Rh2 loss in 2 half-moves