Dual-Category Logic Puzzle

Two linked grids instead of one. Every Seeker has to be matched on both axes at once, so a deduction on one grid unlocks the other; the toughest of the Morning Mystery modes. One of five styles of the daily logic puzzle. Also try the directional map puzzle, or browse past mysteries in the archive.

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Dual-Category Logic Puzzle

A Morning Mystery is a logic-grid deduction puzzle: a short scenario, a cast of suspects, and a handful of clues that fit together exactly one way. Read the clues, rule things out on the grid, and name the culprit. Most take about ten minutes.

You solve it by elimination, never by guessing. Every clue removes possibilities; mark what a clue rules OUT and the answer emerges from what's left. If you get stuck, a hint narrows the grid for you; taking one costs time on the leaderboard but never blocks the solve.

A new mystery posts every morning, and the deduction style rotates: the classic grid, dual-category grids, directional map puzzles, paired-statement truth-tellers, and lineup ordering. Dani's Diabolically Difficult Deduction is the same day's puzzle at maximum difficulty, for people who want a fight.

Every puzzle prints. The daily pack collects the day's sheets with an answer key at the back, and past mysteries stay playable in the archive. Solving an old one just won't land on that day's live leaderboard. Free, no account needed; signing in only saves your solve times and streak.

How the dual-category logic puzzle works

Most logic grids ask you to match one set of things to another. In the dual-category style you match each Seeker to two things at once, such as the goods they sell and where they were standing. That means two linked grids, and every clue can touch either one.

It differs from the classic grid in one way that matters: a deduction on one grid is often the key to the other. If you learn that the baker sold the lanterns, and a later clue says whoever sold the lanterns stood by the well, you can fill in the second grid without any new clue.

A solving tip: finish nothing in isolation. After every dot you confirm, scan the clues that mention the other category, because that is where the next step usually hides. Mark what is ruled out as well as what is certain, since crosses are what make the dots appear. Guessing is never needed, so if you feel stuck, look for a clue you have not used yet.

New to logic grids? The full Morning Mysteries guide has a worked example and answers to common questions. You can also browse every logic puzzle on the site or play past mysteries from the archive.

dual-category logic puzzle terms

Deduction

Working out a fact for certain from the clues you already have. More in the glossary

Clue

A short hint that points to an answer or rules something out. More in the glossary Also on Final Boss Editing: Clue

Seeker

One of the characters in a Morning Mystery. You work out what each Seeker did, sold or said. More in the glossary

Dual category puzzle

A logic puzzle where you match each Seeker to two kinds of thing at once, such as goods and places. More in the glossary

Elimination

Solving by ruling out every option that cannot be true until only one is left. More in the glossary