| Size | Date | Filename |
|---|---|---|
| 24K | May 22 13:31 | most-difficult-contest-12 |
| 23K | May 18 06:15 | most-difficult-contest-11 |
| 23K | May 14 11:07 | most-difficult-contest-10 |
| 23K | May 10 08:43 | most-difficult-contest-9 |
| 23K | May 8 09:40 | most-difficult-contest-8 |
| 24K | May 2 12:10 | most-difficult-contest-7 |
| 22K | Apr 28 10:04 | most-difficult-contest-6 |
| 23K | Apr 24 19:33 | most-difficult-contest-5 |
| 21K | Apr 20 15:43 | most-difficult-contest-4 |
| 23K | Apr 16 20:44 | most-difficult-contest-3 |
| 22K | Apr 12 16:12 | most-difficult-contest-2 |
| 22K | Apr 8 18:13 | most-difficult-contest-1 |