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EGTB: win in 4 half-moves

# move score
1 Rg6 win in 3 half-moves
2 R6c7 draw
3 R8c7 draw
4 Rb7 draw
5 Rbb8 draw
6 Rc1 draw
7 Rc5 draw
8 Rg8 draw
9 Ra6 loss in 4 half-moves
10 Ra8 loss in 4 half-moves
11 Rcb8 loss in 4 half-moves
12 Rb1 loss in 2 half-moves
13 Rb2 loss in 2 half-moves
14 Rb3 loss in 2 half-moves
15 Rb4 loss in 2 half-moves
16 Rb5 loss in 2 half-moves
17 Rc2 loss in 2 half-moves
18 Rc3 loss in 2 half-moves
19 Rc4 loss in 2 half-moves
20 Rd6 loss in 2 half-moves
21 Rd8 loss in 2 half-moves
22 Re6 loss in 2 half-moves
23 Re8 loss in 2 half-moves
24 Rf6 loss in 2 half-moves
25 Rf8 loss in 2 half-moves
26 Rh6 loss in 2 half-moves
27 Rh8 loss in 2 half-moves