277期：大围：04,05,07,08,10,12,13,16,17,20,22,23,26,28,30,33,34,37,40,41,43,45,46,49（共半数）开26准
278期：大围：01,03,06,07,08,09,14,16,18,19,20,27,28,30,31,32,33,36,38,39,42,43,47,48（共半数）开07准
279期：大围：01,02,03,04,07,08,09,11,12,13,18,20,23,24,26,29,30,33,37,38,39,41,42,48（共半数）开40错
280期：大围：04,07,09,10,15,18,22,23,25,27,28,29,30,32,36,37,38,39,41,42,44,46,47,48（共半数）开22准
281期：大围：02,05,07,10,11,13,16,18,19,21,22,24,25,26,27,33,34,35,39,40,41,42,43,46（共半数）开43准
282期：大围：01,02,03,09,11,13,14,15,17,19,20,21,22,28,29,30,33,36,37,38,39,40,41,46（共半数）开13准
283期：大围：01,05,08,10,14,18,21,22,23,25,26,27,28,29,30,31,32,36,37,38,41,45,46,49（共半数）开47错
284期：大围：02,04,07,08,11,12,15,16,17,21,25,26,27,28,29,33,35,40,41,45,46,47,48,49（共半数）开27准
285期：大围：01,02,05,06,08,10,11,13,19,20,21,23,25,29,30,32,34,37,38,40,42,44,45,49（共半数）开21准
286期：大围：02,04,09,10,12,14,15,17,19,21,22,23,25,27,31,32,34,37,41,42,43,45,46,48（共半数）开45准
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287期：大围：01,02,03,04,10,12,13,16,17,19,20,21,23,25,27,31,33,36,39,40,44,46,47,48（共半数）开40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26错
289期：大围：01,02,03,04,08,12,13,14,15,16,18,19,21,22,23,25,27,28,31,33,42,45,46,47（共半数）开04准
290期：大围：01,04,08,10,11,12,13,16,17,20,21,22,27,28,29,30,31,32,34,35,41,42,43,48（共半数）开11准
291期：大围：02,07,09,11,13,17,18,19,20,25,26,27,29,32,33,34,35,37,38,40,42,43,44,45（共半数）开14错
292期：大围：01,02,04,05,06,11,12,14,16,18,21,22,25,27,28,30,37,39,41,44,45,46,47,49（共半数）开44准
293期：大围：01,03,05,06,07,09,10,11,18,19,21,26,27,30,31,35,39,41,42,45,46,47,48,49（共半数）开30准
294期：大围：01,02,03,04,05,06,07,08,12,15,16,17,21,22,23,28,32,37,39,41,42,44,45,48（共半数）开48准
295期：大围：08,09,10,14,15,17,18,19,21,25,27,28,30,36,37,38,39,40,41,42,43,44,46,47（共半数）开24错
296期：大围：01,02,03,04,06,09,11,13,16,17,19,21,27,28,30,31,32,33,37,43,44,47,48,49（共半数）开09准