cluestreak
CLUESTREAK

How to solve logic grid puzzles

Start with certainty, then let elimination do the work. Each person has exactly one item from every other category, and every item is used once.

1. Read the categories first

In The Sunday Coffee Club, guests, drinks and treats are separate categories. Amelia cannot have two drinks, and two guests cannot share the same drink. This one-to-one rule is as important as any written clue.

2. Mark direct clues

A clue saying “Amelia is not paired with Tea” gives an immediate × at Amelia–Tea. A positive clue gives a ✓. Once you confirm a relationship, cross out every other cell in that row and column.

3. Follow indirect relationships

Suppose Amelia has the latte, and the latte drinker has the scone. Amelia must have the scone. Check the drinks–treats grid too: a match in one table can resolve a different table.

4. Find the last possibility

If Oliver cannot have Tea or Mocha in a three-drink puzzle, he must have Latte. Mark it confirmed and eliminate Latte from everyone else. Repeat this scan across all tables.

5. Check every clue

Before submitting, verify each written clue against your matches. All three tables must agree. The check button asks for confirmed matches; crossing out impossible cells is helpful but optional.

Keyboard and screen instructions

Tab to a cell; Enter or Space cycles blank, impossible, confirmed and possible. Arrow keys move around the current table. Each cell announces both labels and its state. Undo and redo cover grid edits. Hints reveal a relationship, so use them when you want a nudge.

Common mistakes

Do not treat “not Tea” as “definitely Latte” when Mocha is still possible. Do not assume the story’s order is meaningful. A possible mark is a note, not a confirmed answer.

Advanced deduction

Consider a temporary assumption: if Amelia had Tea, would two people need the same treat? If so, reject the assumption. You can also track pairs: if two guests can only have Latte or Mocha, nobody else can have either. These rules are valid without guessing an answer.

Try an easy puzzle →