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EGTB: win in 4 half-moves

# move score
1 Rb7 win in 3 half-moves
2 Ra2 draw
3 Ra3 draw
4 Rc2 draw
5 Rc3 draw
6 Rg2 draw
7 Rg3 draw
8 Rh2 draw
9 Rh3 draw
10 Rb1 loss in 4 half-moves
11 Rb4 loss in 2 half-moves
12 Rb5 loss in 2 half-moves
13 Rb6 loss in 2 half-moves
14 Rb8 loss in 2 half-moves
15 Rd2 loss in 2 half-moves
16 Rd3 loss in 2 half-moves
17 Re2 loss in 2 half-moves
18 Re3 loss in 2 half-moves
19 Rf2 loss in 2 half-moves
20 Rf3 loss in 2 half-moves