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Lizely

Knights and Knaves

Solve five transparent truth-and-lie puzzles by assigning every speaker as a truth-telling Knight or a lying Knave.

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How to use

  1. 1.Read every displayed statement, remembering that each Knight speaks truthfully and each Knave makes a false statement.
  2. 2.Assign every speaker a role with the touch controls or number keys 1 through 4, then press Enter or choose Check assignment.
  3. 3.Solve all five fixed puzzles for exactly 1,000 points before a second incorrect complete assignment deadlocks the run.

About Knights and Knaves

Knights and Knaves is a deterministic browser puzzle about consistent statements. Every person in a puzzle has exactly one of two roles. A Knight always makes a true statement, while a Knave always makes a false statement. Your task is to label each speaker so that the truth value of every displayed claim agrees with the role of the person who made it. The page contains five product-authored fixtures, and every restart restores those same five puzzles in the same order. Nothing is randomized, downloaded, or generated by a remote service.

Each round displays two, three, or four named speakers. Read every statement before choosing roles, because one claim can refer to several people and the claims must all work together. Select Knight or Knave on each speaker card, then choose Check assignment. A complete correct assignment awards 200 points and opens the next fixed puzzle. Five correct assignments therefore produce exactly 1,000 points. An incomplete board cannot be submitted, so accidentally pressing Enter before every role is selected does not consume a mistake.

The rules use ordinary Boolean logic rather than an opaque answer lookup. For any proposed assignment, each statement is evaluated as true or false. The result is then compared with the speaker's proposed role: a Knight requires a true statement, and a Knave requires a false one. A solution is accepted only when that equivalence holds for every speaker at once. During development, all possible assignments are enumerated independently for every published fixture. A two-person puzzle checks four assignments, a three-person puzzle checks eight, and a four-person puzzle checks sixteen. The tests require exactly one consistent assignment and require it to match the disclosed product answer fixture.

You can reason forward from a statement or test a candidate assignment by contradiction. For example, if you temporarily label a speaker as a Knight, treat that speaker's words as true and follow the consequences for everyone named in the claim. If another claim then forces the same person to be both roles, the temporary label cannot work. If you label a speaker as a Knave, the whole sentence that person speaks must be false. Statements such as exactly one, both, at least one, and same type have precise meanings, so pay attention to the complete sentence instead of treating a Knave as someone who simply swaps one name.

The first incorrect complete assignment is recoverable. The selected roles remain visible so you can inspect the contradiction, change one or more cards, and submit again. A second incorrect submission ends the run in a visible deadlock. Complete and deadlocked runs are terminal: later role clicks, number keys, and submissions cannot change the score or result. Restart clears the round, score, selections, mistake count, feedback, and terminal state, returning to the first fixed fixture.

The entire route is keyboard playable. Press number keys 1 through 4 to toggle the matching visible speaker. A speaker with no role becomes a Knight on the first toggle; another press changes that speaker to a Knave. Press Enter after all visible speakers have roles to check the assignment. The same controls remain available as large touch-friendly buttons on narrow screens. The shared Restart button starts over, while the site's shared double-Escape boss key temporarily replaces the game with a spreadsheet-style screen and another double-Escape returns to play.

All puzzle data and state transitions run locally in the current browser tab. The game does not upload choices, request an account, call an API, load an external puzzle set, create a user profile, or add a new package. If browser storage is available, only the best completed score is retained by the site's existing game shell. The fixed statements, roles, scoring rule, retry rule, and terminal behavior are product decisions that can be reproduced exactly in automated checks.

This game is intended as casual entertainment and transparent logic practice. It is not a standardized intelligence test, aptitude test, school assessment, psychological instrument, clinical screen, or measure of honesty. A score describes progress through these five known fixtures only. Repeated players may remember the solutions, so the result should not be compared between people or used for education, employment, health, safety, or ability decisions. For another kind of deterministic challenge, the related games offer pattern continuation, number sequences, shaded-grid deduction, and loop clues without changing the local, no-upload play model.

Methodology & sources

Each fixture stores one Boolean predicate per speaker. A candidate assignment is consistent only when, for every speaker index, the assigned Knight value equals the truth value returned by that speaker's predicate. Tests enumerate all 2^n Boolean assignments for each two-, three-, or four-person fixture, require exactly one consistent solution, and compare it with the fixed golden answer. The game awards 200 points per solved fixture, rejects incomplete assignments without an attempt, permits one wrong complete submission, deadlocks on the second, and freezes every action after completion or deadlock.

Frequently asked questions

Does every puzzle have one solution?
Yes. The product tests enumerate all possible Boolean role assignments and require exactly one assignment to make every displayed statement consistent.
What happens after a wrong assignment?
The first wrong complete assignment keeps the current puzzle and selections available for correction. The second wrong submission deadlocks the run until Restart.
Can I play with only a keyboard?
Yes. Number keys 1 through 4 toggle the matching visible speaker, Enter submits a complete assignment, and the shared Restart control resets the route.
Is the score an intelligence or aptitude result?
No. It reports progress through five fixed entertainment puzzles and is not a standardized educational, psychological, clinical, or ability assessment.

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