Whats the hardest puzzle you have ever solved or attempted to solve?

[LLapp]

There's one puzzle with the word "busyness," NOT "business." Drove me wild trying to find out what I was doing wrong.

Nautilus, I feel your pain and I also love that your struggle with that one-letter difference is a great example of the distinction between busyness and business. Very meta, as my son would say.

[Nautilus]

There's one puzzle with the word "busyness," NOT "business." Drove me wild trying to find out what I was doing wrong.

[Descifrador]

I just solved a real killer:


'Two-lane blacktop isn't a highway - it's an attitude.'- Unattributed.

Most of you will probably have less difficulty with it, because you're probably familiar with the meaning of "blacktop".

[rorym]

I agree with oddcouple, I can solve cryptograms, crosswords, acrostics, and logic puzzles but cannot get the hang of suduko. I'm a word person, not a number person.

[skeeter]

"Action cured fear inaction created terror." Some internal punctuation might have helped.

[NotTooOld]

Know safety no injury.

[oddcouple]

Ironically, I've spent the past 44 years as an accountant, yet I've never been able to get the hang of Sudoku. OTOH, my wife, who needs to count the spots on a domino to know the point count, excels at it.

[badbob]

he who diggeth a pit shall fall therein

[Deanna48]

"Hindsight bias makes surprises vanish" - by Daniel Kahneman. It took me 3 hours to actually solve that one the first time! The next time I got it, though, I recognized it and took the record!

[pattersonpaul]

What puzzle is impossible for you?