| When | User | Flag Type | Description |
|---|---|---|---|
| 2011-08-17 15:01:21 | oto | Well Constructed | |
| 2014-10-06 09:58:51 | Rafalo | Well Constructed | |
| 2015-11-16 06:57:21 | manslay | Well Constructed | |
| 2020-03-25 22:49:19 | そもそも | Needs Fixing | There is a branch where there is no black correct answer. |