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EGTB: win in 4 half-moves

# move score
1 Rc8 win in 3 half-moves
2 Kaa7 draw
3 Kab7 draw
4 Kba7 draw
5 Kbb7 draw
6 Kc7 draw
7 Rc2 draw
8 Rc3 draw
9 Rg1 draw
10 Kc8 loss in 2 half-moves
11 Ra1 loss in 2 half-moves
12 Rb1 loss in 2 half-moves
13 Rc4 loss in 2 half-moves
14 Rc5 loss in 2 half-moves
15 Rc6 loss in 2 half-moves
16 Rd1 loss in 2 half-moves
17 Re1 loss in 2 half-moves
18 Rf1 loss in 2 half-moves
19 Rh1 loss in 2 half-moves
20 Rc7 loss in 1 half-moves