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EGTB: win in 4 half-moves

# move score
1 Ra8 win in 3 half-moves
2 Kh6 draw
3 Ra2 draw
4 Ra3 draw
5 Ra7 draw
6 Rb1 draw
7 Rf1 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 Ra4 loss in 2 half-moves
14 Ra5 loss in 2 half-moves
15 Ra6 loss in 2 half-moves
16 Rc1 loss in 2 half-moves
17 Rd1 loss in 2 half-moves
18 Re1 loss in 2 half-moves
19 Rg1 loss in 2 half-moves
20 Rh1 loss in 2 half-moves