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EGTB: win in 4 half-moves

# move score
1 Rg2 win in 3 half-moves
2 Rb7 draw
3 Rf7 draw
4 Rg1 draw
5 Rg3 draw
6 Rg4 draw
7 Rg5 draw
8 Rh7 draw
9 Kd1 loss in 2 half-moves
10 Kd2 loss in 2 half-moves
11 Ke2 loss in 2 half-moves
12 Kf1 loss in 2 half-moves
13 Kf2 loss in 2 half-moves
14 Ra7 loss in 2 half-moves
15 Rc7 loss in 2 half-moves
16 Rd7 loss in 2 half-moves
17 Re7 loss in 2 half-moves
18 Rg6 loss in 2 half-moves
19 Rg8 loss in 2 half-moves