Scenario:
Player receives a 3 by 3 grid with a hidden value in each cell. The values should not be visible to the owner of the grid or anyone else. The player can pick a cell to reveal the value and make it public.
I was wondering if it is possible to accomplish this completely on chain. Right now I am thinking of storing each cell as a cryptographic hash of the value along with a nonce. But the creator of the game would need to be the one who stores and manages the nonces off chain.
Is this possible to achieve without storing anything off chain?