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EGTB: win in 4 half-moves

# move score
1 Rg7 win in 3 half-moves
2 Ra7 draw
3 Rb7 draw
4 Rc1 draw
5 Rc2 draw
6 Rc4 draw
7 Rf7 draw
8 K7g7 loss in 2 half-moves
9 K7g8 loss in 2 half-moves
10 K8g7 loss in 2 half-moves
11 K8g8 loss in 2 half-moves
12 Kg6 loss in 2 half-moves
13 Kh6 loss in 2 half-moves
14 Rc3 loss in 2 half-moves
15 Rc5 loss in 2 half-moves
16 Rc6 loss in 2 half-moves
17 Rc8 loss in 2 half-moves
18 Rd7 loss in 2 half-moves
19 Re7 loss in 2 half-moves