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EGTB: win in 4 half-moves

# move score
1 Rb6 win in 3 half-moves
2 Ka5 draw
3 Ka7 draw
4 Kb5 draw
5 Kb6 draw
6 Ra2 draw
7 Rb1 draw
8 Rb5 draw
9 Rb7 draw
10 Rb8 draw
11 Rc2 draw
12 Rd2 draw
13 Kb7 loss in 2 half-moves
14 Kd1 loss in 2 half-moves
15 Kd2 loss in 2 half-moves
16 Kd3 loss in 2 half-moves
17 Ke1 loss in 2 half-moves
18 Ke3 loss in 2 half-moves
19 Kf1 loss in 2 half-moves
20 Kf2 loss in 2 half-moves
21 Kf3 loss in 2 half-moves
22 Rb3 loss in 2 half-moves
23 Rb4 loss in 2 half-moves