Awhile ago I watched Liar Game and absolutely loved it and have been trying to find similar dramas that give me the same feeling, but so far none of them have really done it. What I loved about Liar Game was that I loved how it makes you think and for me it kept me on the edge of my seat whether they would pull through the round or not. The puzzles they had to solve made me feel like an idiot because I couldn't even fathom how to solve them and I loved that about the show! To me it was unpredictable.
So if there are any recommendations for a good got me on the edge of my seat, unpredictable show, it would be greatly appreciated! Bonus points if they have puzzles to solve and a hint of dorkiness. I would prefer j-dramas, but recommendations for any other countries shows works too.
Note: I tried the variety show The Genius already and it didn't do it for me even though I had heard it was similar.