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EGTB: win in 4 half-moves

# move score
1 Rb5 win in 3 half-moves
2 Kaa5 draw
3 Kab5 draw
4 Kbb5 draw
5 Ra8 draw
6 Rb6 draw
7 Rb7 draw
8 Re8 draw
9 Kaa3 loss in 2 half-moves
10 Kab3 loss in 2 half-moves
11 Kba3 loss in 2 half-moves
12 Kba5 loss in 2 half-moves
13 Kbb3 loss in 2 half-moves
14 Kc3 loss in 2 half-moves
15 Kc4 loss in 2 half-moves
16 Kc5 loss in 2 half-moves
17 Rc8 loss in 2 half-moves
18 Rd8 loss in 2 half-moves
19 Rf8 loss in 2 half-moves
20 Rg8 loss in 2 half-moves
21 Rh8 loss in 2 half-moves