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EGTB: win in 4 half-moves

# move score
1 Rg1 win in 3 half-moves
2 Rh1 win in 3 half-moves
3 K7g8 draw
4 K8g8 draw
5 Kh6 draw
6 Ra1 draw
7 Rb2 draw
8 Rb6 draw
9 Rb7 draw
10 Rb8 draw
11 Rf1 draw
12 K7g7 loss in 2 half-moves
13 K8g7 loss in 2 half-moves
14 Kg6 loss in 2 half-moves
15 Rb3 loss in 2 half-moves
16 Rb4 loss in 2 half-moves
17 Rb5 loss in 2 half-moves
18 Rc1 loss in 2 half-moves
19 Rd1 loss in 2 half-moves
20 Re1 loss in 2 half-moves