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EGTB: win in 4 half-moves

# move score
1 Rb2 win in 3 half-moves
2 Nf3 draw
3 Ra8 draw
4 Rb1 draw
5 Rh8 draw
6 Ne2 loss in 2 half-moves
7 Nh3 loss in 2 half-moves
8 Rb3 loss in 2 half-moves
9 Rb4 loss in 2 half-moves
10 Rb5 loss in 2 half-moves
11 Rb6 loss in 2 half-moves
12 Rb7 loss in 2 half-moves
13 Rc8 loss in 2 half-moves
14 Rd8 loss in 2 half-moves
15 Re8 loss in 2 half-moves
16 Rf8 loss in 2 half-moves
17 Rg8 loss in 2 half-moves