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EGTB: win in 4 half-moves

# move score
1 Rb5 win in 3 half-moves
2 Ka5 draw
3 Ka8 draw
4 Kb5 draw
5 Ra1 draw
6 Rb2 draw
7 Rb3 draw
8 Rb4 draw
9 Rb6 draw
10 Rf1 draw
11 K6b6 loss in 2 half-moves
12 K6b7 loss in 2 half-moves
13 K7b6 loss in 2 half-moves
14 K7b7 loss in 2 half-moves
15 Kb8 loss in 2 half-moves
16 Rb7 loss in 2 half-moves
17 Rb8 loss in 2 half-moves
18 Rc1 loss in 2 half-moves
19 Rd1 loss in 2 half-moves
20 Re1 loss in 2 half-moves
21 Rg1 loss in 2 half-moves
22 Rh1 loss in 2 half-moves