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EGTB: win in 4 half-moves

# move score
1 Rg3 win in 3 half-moves
2 Ra3 draw
3 Rb4 draw
4 Rb5 draw
5 Rb6 draw
6 Rb7 draw
7 Re3 draw
8 Rf3 draw
9 K3g3 loss in 2 half-moves
10 K3g4 loss in 2 half-moves
11 K4g3 loss in 2 half-moves
12 K4g4 loss in 2 half-moves
13 Kg2 loss in 2 half-moves
14 Kg5 loss in 2 half-moves
15 Kh2 loss in 2 half-moves
16 Kh5 loss in 2 half-moves
17 Rb1 loss in 2 half-moves
18 Rb2 loss in 2 half-moves
19 Rb8 loss in 2 half-moves
20 Rc3 loss in 2 half-moves
21 Rd3 loss in 2 half-moves