I had the bright idea of writing down the coordinates where I find items including the Chalice. But, yet to execute on it :p
Pretty sure I made it so when you win it bumps you up to a new overworld. So, I've been resetting the game when I win to make sure the item locations are the same.
To be clear when you VERY first enter a room the two numbers in yellow are your current coordinates in the kingdom.
P.S. Yes, I made the game. But, I forgot where everything is as it's been awhile and lost my testing notes :)