| When | User | Flag Type | Description |
|---|---|---|---|
| 2009-10-26 04:50:56 | Mute | Needs Fixing | A correct solution is posted as incorrect, see my comment. |
| 2013-04-30 10:35:48 | Matrok | Well Constructed | |
| 2013-10-28 07:39:33 | saxifrage | Needs Fixing | does not allow alternate solutions |
| 2016-09-16 00:19:07 | Sollies | Well Constructed | |
| 2018-01-28 07:52:37 | 黄翊涵 | Needs Fixing | A18错误，是双活 |