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EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Ra2 draw
3 Rc7 draw
4 Re2 draw
5 Ka4 loss in 2 half-moves
6 Ka6 loss in 2 half-moves
7 Kb4 loss in 2 half-moves
8 Kb5 loss in 2 half-moves
9 Rb2 loss in 2 half-moves
10 Rc1 loss in 2 half-moves
11 Rc3 loss in 2 half-moves
12 Rc4 loss in 2 half-moves
13 Rc5 loss in 2 half-moves
14 Rc6 loss in 2 half-moves
15 Rc8 loss in 2 half-moves
16 Rd2 loss in 2 half-moves
17 Rf2 loss in 2 half-moves
18 Rg2 loss in 2 half-moves
19 Rh2 loss in 2 half-moves