257期半数中特：03,04,05,07,08,10,13,15,16,17,20,22,25,27,28,29,32,34,39,40,41,44,46,（共23个）开28准
258期半数中特：02,03,04,07,08,11,14,15,16,19,20,23,24,26,27,28,31,32,35,38,40,44,47,48,（共24个） 开38准
259期半数中特：01,02,04,07,11,12,13,14,16,19,23,24,25,26,28,31,35,36,37,38,40,43,47,48,49,（共25个）开47准
260期半数中特：02,03,05,06,07,10,14,15,17,18,19,22,26,27,29,30,31,34,38,39,41,42,43,46,（共24个） 开03准
261期半数中特：01,02,05,09,10,12,13,14,17,21,22,24,25,26,29,33,34,36,37,38,41,45,46,48,49,（共25个）开33准
262期半数中特：01,02,04,06,07,08,13,14,16,18,19,20,25,26,28,30,31,32,37,38,40,42,43,44,49,（共25个）开00准