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EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Kg6 draw
3 Kh6 draw
4 Rb1 draw
5 Rb6 draw
6 Rb7 draw
7 Rc4 draw
8 Re4 draw
9 Rf4 draw
10 Rg4 draw
11 Kd7 loss in 2 half-moves
12 Kd8 loss in 2 half-moves
13 Ke7 loss in 2 half-moves
14 Kf7 loss in 2 half-moves
15 Kf8 loss in 2 half-moves
16 Kg7 loss in 2 half-moves
17 Kg8 loss in 2 half-moves
18 Kh8 loss in 2 half-moves
19 Ra4 loss in 2 half-moves
20 Rb2 loss in 2 half-moves
21 Rb3 loss in 2 half-moves
22 Rb5 loss in 2 half-moves
23 Rd4 loss in 2 half-moves
24 Rh4 loss in 2 half-moves