I don’t know why you had to start a thread about it. Plenty of people have solved the rubiks cube before.
I can never tell you about it. It’s kind of like stealing a Renoir. Sure, you get plenty of enjoyment out of it, but you can’t show it off.
That’s it! You’ve stolen a Renoir!
Well, as long as it’s legal and moral, then I’ve done it too. So there!
And thus begins a long line of bad horror movies. I Know What Cainxinth Did Last Thread, etc. etc. ad infinitum. 
I haven’t! And I just went and bought one yesterday because they’re addictive. Maybe cainxinth solved a really big (ie, monumental) rubiks cube. And then anally consumed it.
>Perhaps some of cainxinth’s past thread titles contain clues…
Definitely contained one giant clue for me. I was about to guess “he learned to post”.
“A big achievement”, eh? Maybe it was what came out your butt.
Your feces looked like a Renoir?