About

About GridCipher

What GridCipher is

GridCipher is a weekly edition of logic grid puzzles built around one-to-one matching. Each puzzle asks you to connect items across categories using a compact set of clues and pure deduction.

How puzzles are produced

Puzzles are authored with a single intended solution and a deterministic one-to-one mapping stored in the puzzle JSON. Build-time validation checks for consistent IDs, category sizes, and a valid solution mapping before a puzzle is published.

What no guessing means

Every puzzle is designed to be solvable by logic alone. If you follow the clues and eliminate impossible pairs, the remaining matches should resolve without random guessing.

Transparency and limitations

We aim for clarity and correctness, but mistakes can happen. If you find an issue, we will review it and correct the puzzle content as needed.

Report an issue

Use the contact page to report a puzzle issue. Include the puzzle date and a short description so we can investigate quickly.

Last updated: 2026-01-17