| When | User | Flag Type | Description |
|---|---|---|---|
| 2010-02-16 02:19:16 | SeerRus | Well Constructed | |
| 2011-11-17 02:59:57 | Remix6974 | Well Constructed | |
| 2012-10-17 06:23:00 | Akkaron | Needs Fixing | 濫報了 |
| 2013-02-24 15:09:17 | jusangen | Needs Fixing | there are other answers to the problem that were marked wrong |
| 2013-04-27 05:13:42 | draq | Needs Fixing | c4-c3 is also a valid move |