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EGTB: win in 4 half-moves

# move score
1 Rb4 win in 3 half-moves
2 Kaa4 draw
3 Kab4 draw
4 Kbb4 draw
5 Ra1 draw
6 Rb2 draw
7 Rb3 draw
8 Rh1 draw
9 Kaa6 loss in 2 half-moves
10 Kab6 loss in 2 half-moves
11 Kba4 loss in 2 half-moves
12 Kba6 loss in 2 half-moves
13 Kbb6 loss in 2 half-moves
14 Kc4 loss in 2 half-moves
15 Kc5 loss in 2 half-moves
16 Kc6 loss in 2 half-moves
17 Rc1 loss in 2 half-moves
18 Rd1 loss in 2 half-moves
19 Re1 loss in 2 half-moves
20 Rf1 loss in 2 half-moves
21 Rg1 loss in 2 half-moves