Hey everyone! Just thought I would share some things I figured out while trying to get this achievement that might help other people. It's not foolproof, but hopefully it makes it less like taking a shot in the dark every time.

1. Start from the corners. This is a good strategy because the corner and edge tiles have less than 8 tiles surrounding them, which helps with the process of elimination later. Sometimes you're unlucky and you'll hit a ghost right away, but that's okay! Just reset and start again from the corner.

2. The symbols associate with the numbers 1-8 (representing the 8 tiles surrounding each other tile), but every game, the symbols and numbers are randomly paired. So, for example, maybe the crescent moon = 1 for one game, but it could be any number between 1-8 for the next game. How do you figure out which symbol = which number? Refer to the picture below (click to enlarge).


3. Look at the tile squared in red. My first click opened up that large safe space from the left upper corner. I can see that there's only one square that's not revealed and still touching that first "female" symbol. This means that the female symbol (green square), for this game = 1. So 1 tile has a ghost under it, and it's that unexposed tile. Now I know that the female symbol = 1 ghost tile.

4. Now there's upsidedown triangle (blue square) diagonally to the right from the female symbol above. It has two unrevealed squares out of the eight surrounding squares. This means that somewhere between 1-2 tiles have a ghost under it, and the female symbol we know = 1, which means that this symbol = 2 tiles with ghosts under it by process of elimination. I already determined that the tile squared in red has a ghost under it. Based on our logic that the upsidedown triangle = 2, that means the other unrevealed tile must also have a ghost under it (for a total of 2 ghost tiles).


5. Now let's look at the upsidedown triangle below the previous one (yellow square). We already know upsidedown triangles = 2, and we know that the tile squared in red has a ghost under it. This tile, like the previous one, only has two unrevealed squares out of the surrounding eight, including the red squared one we know has a ghost under it. That means the remaining unrevealed tile (orange square) must also have a ghost under it (2 total).

You keep progressing that way until you've figured out most of the numbers/symbols. Remember that the number/symbol association is random each game, so you have to start over with your elimination strategy if you start a new game. It's very tedious and sometimes you mess up, which can be frustrating, but I hope this helps a little!