This is what I call an interesting thread guys!
Tried to read upon it, is it a solvable puzzle after all? By now the 32 BTC are a juicy prize pool. What is the motivation for that person to do this? How did OP even notice this address cluster? By coincidence is OP involved?
it's very complicated if you don't have a state-of-the-art pc. because there is no standard for finding private keys. Only quantum computers will find these private keys difficult. Now if you know or guess where that private key is, you are too lucky.
But going over the discussion here I am of the impression that there is much more you need than just a state-of-the-art computer. Is this puzzle to be solved just based on luck or an element of luck or could it be solved based on pure logic?