Wolfpack48
Hero
The difficult part is to devise fairly discoverable clues and puzzles so as not to be opaque but not so easy and transparent that it is not a challenge. Many will argue that Tomb of Horrors leans to opaque, but then Gygax was running that adventure for seasoned vets. Mixing and changing monster abilities and tactics, and new devious traps made for many a Dragon article back in the day.It is very much an arms race of creativity between the players and referee. But not in an antagonistic sense. I think this is one of the core reasons why the stuff in the OSR is so wildly creative and the DIY spirit permeates the scene. Every player is constantly tasked with creatively solving puzzles and the referee is constantly tasked with introducing new creative puzzles. Again, puzzles here standing in for all the stuff whether literal puzzles, unique monsters, traps, etc.