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EGTB: win in 4 half-moves

# move score
1 Rb2 win in 3 half-moves
2 Ra2 draw
3 Rc2 draw
4 Rd2 draw
5 Re2 draw
6 Rf4 draw
7 Rf6 draw
8 Rf8 draw
9 Ka4 loss in 2 half-moves
10 Ka6 loss in 2 half-moves
11 Kb4 loss in 2 half-moves
12 Kb5 loss in 2 half-moves
13 Kb6 loss in 2 half-moves
14 Rf1 loss in 2 half-moves
15 Rf3 loss in 2 half-moves
16 Rf5 loss in 2 half-moves
17 Rf7 loss in 2 half-moves
18 Rg2 loss in 2 half-moves
19 Rh2 loss in 2 half-moves