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EGTB: win in 4 half-moves

# move score
1 Rb6 win in 3 half-moves
2 Kaa5 draw
3 Kab4 draw
4 Kb6 draw
5 Kbb4 draw
6 Ra8 draw
7 Rb7 draw
8 Rg8 draw
9 Ka3 loss in 2 half-moves
10 Ka6 loss in 2 half-moves
11 Kb3 loss in 2 half-moves
12 Kba5 loss in 2 half-moves
13 Kc4 loss in 2 half-moves
14 Kc5 loss in 2 half-moves
15 Kc6 loss in 2 half-moves
16 Rc8 loss in 2 half-moves
17 Rd8 loss in 2 half-moves
18 Re8 loss in 2 half-moves
19 Rf8 loss in 2 half-moves
20 Rh8 loss in 2 half-moves