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EGTB: win in 4 half-moves

# move score
1 Rg7 win in 3 half-moves
2 Ra2 draw
3 Rc2 draw
4 Rd2 draw
5 Re2 draw
6 Rg3 draw
7 Rg4 draw
8 Rg5 draw
9 Rg6 draw
10 Rg8 draw
11 Ke7 loss in 2 half-moves
12 Ke8 loss in 2 half-moves
13 Kf7 loss in 2 half-moves
14 Kfg7 loss in 2 half-moves
15 Kfg8 loss in 2 half-moves
16 Kh7 loss in 2 half-moves
17 Khg7 loss in 2 half-moves
18 Khg8 loss in 2 half-moves
19 Rb2 loss in 2 half-moves
20 Rf2 loss in 2 half-moves
21 Rg1 loss in 2 half-moves
22 Rh2 loss in 2 half-moves