Unearthed | Side missions - Kolbjorn Barrow - The Elder Scrolls V: Skyrim - Dragonborn Game Guide | gamepressure.com
Skyrim KOLBJORN BARROW floor puzzle - YouTube
This is the only canon puzzle (Dragonborn DLC - Kolbjorn Barrow) that's so obscure that I doubt the vast majority of players have solved without Google : skyrim