SPH
| Date | Clue |
|---|---|
| 2018-11-11 | Round fig. |
| 2018-05-07 | Globe: Abbr. |
| 2017-05-03 | Three-dimensional fig. |
| 2016-05-31 | Globe shape: Abbr. |
| 2009-11-10 | Globe: Abbr. |
| 2007-03-25 | Geom. solid |
| 2007-02-09 | Geom. figure |
| 2006-09-28 | Geom. solid |
| 2004-12-31 | Geom. solid |
| 2001-06-24 | Geom. solid |
| 2000-07-05 | Geom. solid |