DOOM 1 - CHEQUERS.WAD
Channel: DOOM WAD World
Date: 2022-10-15

called "HELL'S CHEQUER BOARD" in the /idgames FTP.
https://www.doomworld.com/idgames/levels/doom/a-c/chequers
created by David Fleet on November 30th, 1994.
from the .txt file included with the WAD:
"This level has a BFG but if you want it without cheating, you will need to first find the yellow key, then the secret area in which you will find the red key to give you access to the BFG. In the Chequer board room try and visit all areas. GOOD LUCK!" ------------------------------------
discord: https://discord.gg/aUsWnqaePy