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EGTB: win in 4 half-moves

# move score
1 Rb4 win in 3 half-moves
2 Ka1 draw
3 Ka4 draw
4 Ra6 draw
5 Rb5 draw
6 Rb7 draw
7 Rb8 draw
8 Rh6 draw
9 K2b2 loss in 2 half-moves
10 K2b3 loss in 2 half-moves
11 K3b2 loss in 2 half-moves
12 K3b3 loss in 2 half-moves
13 Kb1 loss in 2 half-moves
14 Kb4 loss in 2 half-moves
15 Rb1 loss in 2 half-moves
16 Rb2 loss in 2 half-moves
17 Rb3 loss in 2 half-moves
18 Rc6 loss in 2 half-moves
19 Rd6 loss in 2 half-moves
20 Re6 loss in 2 half-moves
21 Rf6 loss in 2 half-moves
22 Rg6 loss in 2 half-moves