Pigpen

When you see a string of strange angular shapes — lines, dots, and right angles — on an escape room wall, you're almost certainly looking at a Pigpen cipher. It's also known as the Freemason cipher, and it's one of the simpler codes to crack.

What It Is

The Pigpen cipher maps each letter of the alphabet to a portion of a grid. Two tic-tac-toe grids (one plain, one with dots) and two X shapes (one plain, one with dots) divide the 26 letters into groups. Each letter is represented by the shape of the grid section it sits in, with or without a dot. For example, if A sits in the top-left cell of the first grid, it's represented by a right angle opening to the right and bottom (the lines that border that cell).

The standard layout:

A|B|C    J\K/L
-+-+-     \|/
D|E|F      X     (with dots for second set)
-+-+-     /|\
G|H|I    M/N\O

How to Solve It

1. Recognize the symbols. Pigpen symbols are angular and geometric — right angles, V shapes, and lines with or without dots. If you see these, you're dealing with Pigpen.
2. Find the key. The room typically contains a reference grid somewhere — on a wall, inside a book, or scratched into a surface. Without the key, you'll need to reconstruct it from memory.
3. Memorize the basic structure. Letters A-I go in a 3x3 grid (no dots). Letters J-R go in the same grid layout (with dots). S-V go in an X shape (no dots). W-Z go in an X shape (with dots).
4. Decode one letter at a time. Match each symbol to its position in the grid. Write down the letter, then move to the next symbol.
5. Watch for variations. Some escape rooms use a non-standard letter ordering or a custom grid layout. The key in the room is your authority — don't assume the standard arrangement.

Examples

The Secret Society Message: Angular symbols are carved into a wooden box. A Freemason-themed painting on the wall includes a small grid reference in the corner. Decoding the symbols spells "WEST WALL" — directing you to search the western wall.

The Scattered Grid: The key grid isn't shown complete — instead, four fragments of the grid are hidden in different locations. You must assemble all four to decode the full message on the door.

The Mixed Cipher: Some symbols have dots; others don't. A new player might miss the dots entirely and get gibberish. Look carefully — the presence or absence of a dot changes the letter completely.

Difficulty Variations

Easy: The full key grid is provided right next to the encoded message. You just need to match symbols to letters — a straightforward lookup task.

Hard: The key grid is hidden, incomplete, or uses a non-standard letter order. Some rooms make you construct the grid yourself from clues, or the encoded message is long enough that speed and accuracy become a challenge.

Related Puzzles

Like the Caesar cipher, Pigpen is a substitution cipher — each letter maps to exactly one symbol. Morse code takes a different approach, using sequences of dots and dashes rather than geometric shapes.