Number | Name | Score | Regex | Length | All match? | Credit |
---|
1 | Plain Strings| 207 | `foo` | 3 | Yes |
2 | Anchors | 208 | `k$` | 2 | Yes |
3 | Ranges | 202 | `^[a-f]*$` | 8 | Yes |
4 | Backrefs | 201 | `(...).*\1` | 9 | Yes | gorhill (HN)
5 | Abba | 193 | `^(?!.*(.)(.)\2\1)` | 17 | Yes | chingjun (HN) / josephlord (HN)
6 | A man, a plan| 177 | `^(.)[^p].*\1$` | 13 | Yes | hyp0 (HN)
7 | Prime | 286 | ^(?!(..+)\1+$)
| 14 | Yes | josephlo