Speed quiz
Whodunnit logic puzzle: 16 suspects
Every suspect makes a statement. Innocent suspects tell the truth; accomplices and the culprit lie. Exactly one suspect in the grid is the culprit.
- Format
- Logic grid
- Items
- 16 cells
- Limit
- 8:00
- Level
- Medium
- Checked
- 2026.10.03
The rules as listed below.
- Grid
- 4 by 4, 16 suspects to mark
- Time limit
- 8:00
- Checks
- 3
- Press a suspect to cycle its mark: innocent, accomplice, culprit, then blank again.
- Check the grid once every suspect is marked. A check says how many are wrong, never which.
- Keyboard: arrow keys move between suspects; I, A, C set a mark and Backspace clears it.
- Pause whenever you like (Esc). The board hides while the clock is stopped.
Mark every suspect innocent, accomplice or culprit. The grid appears when you start.
About this quiz
A grid of suspects who talk about each other. The innocent tell the truth, the accomplices lie to cover for the culprit, and the culprit lies too. Only one reading of the room is consistent.
- There is exactly one culprit.
- A liar's statement is really false, which tells you as much as a true one.
- The solution is unique and can be reached without guessing.
More quizzes like this
| No. | Quiz | Section | Format | Items | Added |
|---|---|---|---|---|---|
| 01 | Whodunnit logic puzzle: 25 suspects 25 suspects in a 5 by 5 grid, each with a statement. The innocent tell the truth, the culprit and the accomplices lie. Find all three kinds. Speed / Logic grid / 25 cells | Speed | Logic grid | 25 | 2026.10.03 |
| 02 | True or false logic puzzle: 5 by 5 A 5 by 5 grid of 25 statements about each other. Mark every cell true or false: only one way of doing it holds together. Speed / Logic grid / 25 cells | Speed | Logic grid | 25 | 2026.10.03 |
| 03 | True or false logic puzzle: 4 by 4 A 4 by 4 grid of 16 statements about each other. Mark every cell true or false: only one way of doing it holds together. Speed / Logic grid / 16 cells | Speed | Logic grid | 16 | 2026.10.03 |