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EGTB: win in 4 half-moves

# move score
1 Rb3 win in 3 half-moves
2 Kaa3 draw
3 Kab3 draw
4 Kbb3 draw
5 Ra1 draw
6 Rb2 draw
7 Rf1 draw
8 Kaa5 loss in 2 half-moves
9 Kab5 loss in 2 half-moves
10 Kba3 loss in 2 half-moves
11 Kba5 loss in 2 half-moves
12 Kbb5 loss in 2 half-moves
13 Kc3 loss in 2 half-moves
14 Kc4 loss in 2 half-moves
15 Kc5 loss in 2 half-moves
16 Rc1 loss in 2 half-moves
17 Rd1 loss in 2 half-moves
18 Re1 loss in 2 half-moves
19 Rg1 loss in 2 half-moves
20 Rh1 loss in 2 half-moves