| Rating | Solver | Clue |
|---|---|---|
| BRAINTEASER | Difficult problem | |
| TEASER | Difficult problem | |
| NUT | Difficult problem | |
| POSER | Difficult problem | |
| ENIGMA | Difficult problem | |
| TICKLER | Difficult or delicate problem | |
| HYDRA | Any wonderful solution to a difficult problem | |
| HARD | Difficult, mentally or judicially; not easily apprehended, decided, or resolved; as a hard problem. | |
| SOLVE | To explain; to resolve; to unfold; to clear up (what is obscure or difficult to be understood); to work out to a result or conclusion; as, to s... | |
| RESOLUTION | ...complex notion, or solving a vexed question or difficult problem. ... | |
| SOLUTION | ... the disentanglement of any intricate problem or difficult question; explanation; clearing up; -- used especially in mathematics, either of t... | |
| KEY | ...ck, open, discover, or solve something unknown or difficult; as, the key to a riddle; the key to a problem. ... | |