Can someone help me find a book from the 1960s or 1970s I read as a boy?

It's probably Cliff Simak's "Spacebred Generations", which appeared in Science-Fiction Plus in April, 1953. I must have read it in an anthology in the 60s. I remembered some additional details; e.g., the protagonist played chess incessantly with his friend, light bulbs were a finite resource--no manufacturing capability, evidently--books were forbidden, and a "deadly gas" was to be released thruout the ship to force everybody to leave and start the colony. That seems to have been enough to track it down!