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EGTB: win in 4 half-moves

# move score
1 Rb2 win in 3 half-moves
2 Ra8 draw
3 Rb7 draw
4 Rbc8 draw
5 Rbd8 draw
6 Re2 draw
7 Re7 draw
8 Rec8 draw
9 Red8 draw
10 Rb1 loss in 2 half-moves
11 Rb3 loss in 2 half-moves
12 Rb4 loss in 2 half-moves
13 Rb5 loss in 2 half-moves
14 Rb6 loss in 2 half-moves
15 Re1 loss in 2 half-moves
16 Re3 loss in 2 half-moves
17 Re4 loss in 2 half-moves
18 Re5 loss in 2 half-moves
19 Re6 loss in 2 half-moves
20 Rf8 loss in 2 half-moves
21 Rg8 loss in 2 half-moves
22 Rh8 loss in 2 half-moves