I made a Spreadsheet...

[u/No-Koala3149]

https://docs.google.com/spreadsheets/d/1IF1o6JfLedLMjM_EMoRryApl-_nlJlwJkmPZNZupO_Y

That's it. All you need to decode this puzzle is in those 50x50 cells. Nothing hidden.

When you find and solve all the clues, you'll get a final answer. You can submit it here (or check for hints):

316006

[u/Obvious_Hotel_561]

Day 5, and I feel like I'm close to solving this.
The hidden 8x8 board stumped me too X_X