| When | User | Flag Type | Description |
|---|---|---|---|
| 2009-10-23 04:16:20 | Seer | Well Constructed | |
| 2012-08-13 14:07:43 | dhallmark | Needs Fixing | problem indicates valid solutions are wrong |
| 2012-08-26 08:30:50 | gaffer1024 | Well Constructed | |
| 2013-06-10 07:52:38 | Matrok | Well Constructed | |
| 2013-11-21 13:58:30 | CoolSmurf | Well Constructed | |
| 2014-01-07 07:41:16 | Aristotle | Well Constructed | |
| 2014-05-20 17:54:32 | foxgloves | Well Constructed | |
| 2014-11-24 11:11:23 | mountain root | Well Constructed | |
| 2015-11-01 13:03:17 | nemoo | Well Constructed | |
| 2016-07-29 23:52:06 | flomic | Well Constructed |