Select whether you want to find the chest; the swords; both the chest and the swords; or the fox (note: solving for both may not find you either before running out of attempts) (note: solving for the fox simply shows the areas you are least likely to find the chest or swords, due to the fox being 1x1 you are unlikely to find it)
Fill in the locked slots
Reveal any one of the slots highlighted in green and fill in what was in that slot
Repeat until the desired picture is found
You can now change what you are search for if you wish
Swords
Chest
Swords and Chest
Fox
Note: This site was last updated before the release of the Faux Hollows minigame. It makes the following assumptions:
The grid is always 6x6
The chest and box are always 2x2
The swords are always 3x2 or 2x3
Only one chest and set of swords can spawn per game
It's likely best to search for swords first, as that gives you the most information about the board state.
If it is possible to determine the entire picture from one revealed square of it, then the whole of that picture can be filled in on this solver, and what you are searching for can be changed
It also might not be the optimal approach to the puzzle. Message suggestions to /u/_Bedo_ on reddit, or open an issue on the github repository.