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EGTB: win in 4 half-moves

# move score
1 Rg4 win in 3 half-moves
2 Rh4 win in 3 half-moves
3 Rb5 draw
4 Rb6 draw
5 Rb7 draw
6 Rb8 draw
7 Rc4 draw
8 Rd4 draw
9 Re4 draw
10 Rf4 draw
11 K1g1 loss in 2 half-moves
12 K1g2 loss in 2 half-moves
13 K2g1 loss in 2 half-moves
14 K2g2 loss in 2 half-moves
15 Kg3 loss in 2 half-moves
16 Kh3 loss in 2 half-moves
17 Ra4 loss in 2 half-moves
18 Rb1 loss in 2 half-moves
19 Rb2 loss in 2 half-moves
20 Rb3 loss in 2 half-moves