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EGTB: win in 4 half-moves

# move score
1 Rb7 win in 3 half-moves
2 Ka3 draw
3 Ka6 draw
4 Kb3 draw
5 Ra7 draw
6 Rc2 draw
7 Rc8 draw
8 Rg7 draw
9 Rh7 draw
10 K4b4 loss in 2 half-moves
11 K4b5 loss in 2 half-moves
12 K5b4 loss in 2 half-moves
13 K5b5 loss in 2 half-moves
14 Kb6 loss in 2 half-moves
15 Rc1 loss in 2 half-moves
16 Rc3 loss in 2 half-moves
17 Rc4 loss in 2 half-moves
18 Rc5 loss in 2 half-moves
19 Rc6 loss in 2 half-moves
20 Rd7 loss in 2 half-moves
21 Re7 loss in 2 half-moves
22 Rf7 loss in 2 half-moves