To think like a detective at a deduction game, eliminate before you guess: log every clue with its source, mark a deduction grid, keep two or three competing theories alive, and look for the contradiction that breaks one. In Sherlock Holmes Consulting Detective, plan each visit, since every lead beyond Holmes's count costs 5 points.
Deduction grid — A table of every possible answer, such as the suspect, room and weapon lists on Clue's Detective's Notes pad or the grids in Murdle puzzles, on which players mark each option as confirmed, ruled out or still open as clues come in.
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What “thinking like a detective” means at the table
At a deduction game, thinking like a detective comes down to one habit: you rule things out before you settle on an answer. The game has already fixed the solution, whether it is three cards in Clue’s envelope, a four-peg code in Mastermind or the answer printed at the back of a Sherlock Holmes Consulting Detective case booklet. Every clue it gives you is true. The work is keeping track of what each clue removes.
The seven techniques below come from the way these games are built. They apply to elimination games, narrative case games, illustrated search games and logic puzzles alike. If you are new to the genre, start with what a deduction game is. If you are working through a cold case file with an online answer key, our method on how to solve a murder mystery covers sorting documents, timelines and hints.
| Technique | Game where it matters most | What it stops you doing |
|---|---|---|
| Keep a deduction grid | Clue, Murdle | Forgetting what was already ruled out |
| Log the source of every clue | Consulting Detective | Trusting a “fact” nobody can trace |
| Learn from what is not shown | Clue, Mastermind | Missing half the information on the table |
| Hold competing theories | Consulting Detective, cold cases | Locking onto the first suspect |
| Hunt the contradiction | MicroMacro: Crime City, case games | Accepting two statements that cannot both be true |
| Spend leads like points | Consulting Detective | Visiting every address in the directory |
| Commit at the right moment | Clue, Consulting Detective | Accusing too early or never stopping |
1. Keep a deduction grid
Write down every possible answer before the first clue arrives. Clue does this for you: its Detective’s Notes pad lists every suspect, room and weapon, 324 possible combinations in the classic edition. Murdle, the logic-grid mystery series G. T. Karber started in 2022, gives you a printed grid in which each row must end with a single yes.
Use three marks, not two: confirmed, ruled out and open. An open box you forgot to mark looks the same as a box you checked, and that is where wrong accusations come from. In narrative games with no printed grid, draw your own with suspects in rows and the questions of the case in columns.
2. Log the source of every clue
A clue without a source is a rumor. In Sherlock Holmes Consulting Detective, write the paragraph number next to each note, such as “14 SW: the clerk saw a visitor at noon”. In Clue, write which player showed you a card. When the group disagrees, the source settles it in seconds: someone reopens the paragraph or recalls the turn.
Logging sources also shows you which clues come from a single witness. A fact confirmed by two independent sources, a newspaper notice and an interview for example, is stronger than one heard once.
3. Learn from what is not shown
Half of the information in a deduction game comes from what does not happen. In Clue, a suggestion must be disproved by the next player clockwise who holds a matching card. If two players pass before a third shows a card, both of them hold none of the three cards you named. Mark that on your grid; many players only record the card they are shown.
Mastermind works the same way. A guess that earns no feedback pegs at all rules every color in that guess out of the code, in every position, which is part of why Donald Knuth could prove in 1976 that a systematic codebreaker never needs more than five guesses.
4. Hold two or three competing theories
The most common mistake in any mystery game is falling for the first suspect and reading every later clue as proof. Keep at least two theories alive, written side by side, and after each new clue ask which one it fits better. A clue that fits both theories equally tells you little; a clue that fits only one is worth discussing.
With a group, give one player the job of defending the second theory. It keeps the table honest until the evidence really decides.
5. Hunt for the contradiction
A theory is rarely proved by one clue. It is broken by two clues that cannot both be true: a character placed in two locations at once, a time that does not match a timetable, an object in the wrong hands. In MicroMacro: Crime City, each case is a deck of 5 to 12 clue cards whose answers are hidden on a map of about 45 by 30 inches. The skill is following a character across the drawing and spotting where their path contradicts what a card claims.
In text-based games, a simple timeline exposes most contradictions. List every timed event in order and check which statements no longer fit.
6. Spend leads like points
Sherlock Holmes Consulting Detective punishes curiosity. According to the rulebook, Holmes always scores 100 points; you score the questions you answer correctly, then lose 5 points for each lead you followed beyond Holmes’s count, or gain 5 for each lead fewer. A group that visits every address in the London Directory can answer every question and still score below Holmes.
Before opening a lead, say out loud what it could prove and what you would do with each possible answer. If nobody can say, skip it. Read the newspaper for the day of the case first: it is free, it often names the person worth visiting, and newspapers dated after the case are not used. Use the specialist informants, such as the analyst or the medical examiner, when a precise question needs an expert, not as a first stop.
7. Commit at the right moment
In competitive games, committing too early costs the game: a wrong accusation in Clue usually takes you out. In cooperative case games, committing too late costs points. Set a rule before you start: in Clue, accuse when one option remains in each category; in Consulting Detective, stop when you can answer the main question and explain it with two sources.
After the reveal, read the solution against your notes. Find the clue you misread or skipped, which is the quickest way to play the next case better.
Where to practice
A short game is the easiest place to build these habits. The best mystery card games fit in a short session, and the best detective board games include the full case games. If Sherlock Holmes Consulting Detective appeals, our guide to which Consulting Detective box to start with compares the four Space Cowboys boxes.
Key facts
- In Sherlock Holmes Consulting Detective, Holmes's score is always 100 points; players subtract 5 points for each lead they followed beyond Holmes's count and add 5 points for each lead fewer.Sherlock Holmes Consulting Detective: The Thames Murders & Other Cases rulebook, RulesPal, 2026
- In Clue, a suggestion must be disproved by the next player clockwise who holds a matching card, shown privately, and the game's Detective's Notes pad lists every room, weapon and character so players can track the 324 possible solutions.Wikipedia, Cluedo, 2026
- Donald Knuth showed in 1976 that a Mastermind code of four pegs in six colors can always be found in five guesses or fewer with a systematic method.Wikipedia, Mastermind (board game), 2026
- Each MicroMacro: Crime City case is a deck of 5 to 12 clue cards whose answers are hidden on a city map of about 45 by 30 inches.Wikipedia, MicroMacro: Crime City, 2026
FAQ
Do detectives use deduction or induction?
Both, and games ask for both. Deduction rules options out with certainty, as when a Clue player shows you the rope card. Induction builds the most likely story from incomplete clues, as in Sherlock Holmes Consulting Detective, where you never read every paragraph. Use deduction to eliminate and induction to choose your next lead.
How do you take good notes in a deduction game?
Keep one grid of every possible answer and mark each box as confirmed, ruled out or open. Next to each mark, write where it came from: the player who showed a card, the paragraph number or the map square. Notes without sources are hard to trust when a theory falls apart.
How do you get better at Clue?
Track more than the cards you are shown. Note which players could not disprove each suggestion, since that tells you which cards they lack, and occasionally suggest a card you hold to test what the others have. Accuse only when one suspect, one room and one weapon remain.
How do you score well in Sherlock Holmes Consulting Detective?
Read the newspaper for the day of the case before visiting anyone, discuss what each lead could prove before you open it, and stop when you can answer the main question. Holmes always scores 100, and every lead beyond his count costs 5 points.