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EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Rc1 win in 3 half-moves
3 Bb4 draw
4 Bc1 draw
5 Bd6 draw
6 Be7 draw
7 Ra1 draw
8 Rb2 draw
9 Bb2 loss in 2 half-moves
10 Bc5 loss in 2 half-moves
11 Bf8 loss in 2 half-moves
12 Rb3 loss in 2 half-moves
13 Rb4 loss in 2 half-moves
14 Rb5 loss in 2 half-moves
15 Rb6 loss in 2 half-moves
16 Rb7 loss in 2 half-moves
17 Rd1 loss in 2 half-moves
18 Re1 loss in 2 half-moves
19 Rf1 loss in 2 half-moves
20 Rg1 loss in 2 half-moves
21 Rh1 loss in 2 half-moves