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EGTB: win in 4 half-moves

# move score
1 Rg1 win in 3 half-moves
2 Kg1 draw
3 Kg2 draw
4 Kh2 draw
5 Rd1 draw
6 Re2 draw
7 Re8 draw
8 Rf1 draw
9 Ra1 loss in 2 half-moves
10 Rb1 loss in 2 half-moves
11 Rc1 loss in 2 half-moves
12 Re3 loss in 2 half-moves
13 Re4 loss in 2 half-moves
14 Re5 loss in 2 half-moves
15 Re6 loss in 2 half-moves
16 Re7 loss in 2 half-moves