287期：大围：02,03,08,09,11,12,13,15,16,17,18,20,25,26,29,30,32,33,35,38,41,43,45,46（共半数）开25准
288期：大围：01,02,05,07,08,09,11,13,14,15,16,18,19,21,22,25,28,33,40,41,44,45,47,48（共半数）开09准
289期：大围：02,06,07,09,10,11,13,14,15,17,18,21,23,27,30,31,32,33,34,37,39,41,42,46（共半数）开08错
290期：大围：01,03,04,05,06,07,08,10,11,12,14,19,24,25,29,34,35,40,41,42,44,45,46,49（共半数）开？？√【？中？】