| When | User | Flag Type | Description |
|---|---|---|---|
| 2009-05-06 10:59:12 | mgrimfors | Well Constructed | |
| 2013-09-21 03:21:17 | Matrok | Well Constructed | |
| 2013-11-14 14:21:44 | BobTheJoe | Needs Fixing | There are many, many paths that should be added to demonstrate other possibilities. Problems are useless without a demonstration of why wrong ideas are wrong. |
| 2014-10-07 13:59:32 | elentarwon | Needs Fixing | More variations needed. |
| 2014-10-23 20:33:08 | jokep | Needs Fixing | please correct the texts ... they are hard to understand |
| 2015-07-16 15:53:52 | Siaubunas | Well Constructed | |
| 2017-01-04 21:59:26 | ranka | Needs Fixing | |
| 2017-10-30 03:42:37 | mdp05mimura | Well Constructed | |
| 2019-09-05 21:16:39 | Starline | Well Constructed |