Read
Each person gives one structured piece of evidence. Traits and map details are always available in text.
Spatial detective puzzles Every placement
Every placement
must fit the evidence.
Read the witness notes. Inspect the scene. Place every person without sharing a row or column—then prove who fits the final clue.
FIELD MAP / 04
ABCD
✓ Rows clear
✓ Columns clear
One answer remains
✓ Columns clear
One answer remains
Place
Position every character on the layered scene. A row or column can contain at most one person.
Prove
Answer the case objective, then replay the deduction chain step by step.
Open files
View all cases →Begin with the evidence you have.
Training file 00
The Vanishing Keycard
A museum keycard vanished during a security drill. Learn the scene rules and recover it.
Case file 01The Quiet Gallery
A miniature star map disappeared during a private viewing. One visitor left a print at the empty plinth.
Case file 02Signal at Meridian
The observatory's relay was cut minutes before a once-a-decade transmission.
Stuck is not the endA hint should teach,
A hint should teach,
not spoil.
CrimeGrid offers three levels of help: where to look, what to deduce, and—only if you ask—which placement follows. Every published hint is checked against the same solver that proves the case has one solution.