Im not favor much puzzle type RPG games. I´ll like more plan battle strategys etc... and im not also very math grade talented man. More visual and memorize talented. Its my strong point my IQ
I think this one Lufia 2 SNES: Called name : Most Difficult Trick. Even my 135 IQ its take me 3 & half hours recorded attempts total. This completion attempt take 30 minutes. I´ll very glad myself when i completed it without spoilers. Serisouly it was harder than any license lemmings games levels IMO.
https://www.youtube.com/watch?v=2bgyNO4uRx0How ever its not mandatory puzzle. Completion voluntary if you like some high challenge puzzles to solved.