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EGTB: win in 4 half-moves

# move score
1 Rg2 win in 3 half-moves
2 Ra5 draw
3 Rc5 draw
4 Rd5 draw
5 Re5 draw
6 Rg6 draw
7 Rg7 draw
8 Rg8 draw
9 Ke1 loss in 2 half-moves
10 Ke2 loss in 2 half-moves
11 Kff2 loss in 2 half-moves
12 Kfg2 loss in 2 half-moves
13 Kgf2 loss in 2 half-moves
14 Kgg2 loss in 2 half-moves
15 Kh1 loss in 2 half-moves
16 Kh2 loss in 2 half-moves
17 Rb5 loss in 2 half-moves
18 Rf5 loss in 2 half-moves
19 Rg3 loss in 2 half-moves
20 Rg4 loss in 2 half-moves
21 Rh5 loss in 2 half-moves