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EGTB: win in 4 half-moves

# move score
1 Rf1 win in 3 half-moves
2 Ra1 draw
3 Ra7 draw
4 Rb2 draw
5 Rb5 draw
6 Rb8 draw
7 Rf7 draw
8 Rgb1 draw
9 Rbb1 loss in 8 half-moves
10 Rb3 loss in 2 half-moves
11 Rb4 loss in 2 half-moves
12 Rb6 loss in 2 half-moves
13 Rc1 loss in 2 half-moves
14 Rc7 loss in 2 half-moves
15 Rd1 loss in 2 half-moves
16 Rd7 loss in 2 half-moves
17 Re1 loss in 2 half-moves
18 Re7 loss in 2 half-moves
19 Rg7 loss in 2 half-moves
20 Rh1 loss in 2 half-moves
21 Rh7 loss in 2 half-moves