Every detective in the world got these same crime scenes on 2026-10-31 — each difficulty published twice, once untimed and once as time attack. Each case is procedurally generated and then proved to have exactly one logical solution before it is published, including the cases where somebody is lying. You place every suspect back on the map using only their testimony: exactly one person per row, never two in a column. Whoever is left alone with the victim did it.
A 5×5 grid across 4 rooms: Sculpture Hall, Print Room, Courtyard, Supply Closet. Six statements, six squares nobody could stand on, and no assumption anywhere: elimination alone closes it.
Cracked by 4 detectives so far.
A 5×5 grid across 4 rooms: Kiln Room, Supply Closet, Locker Room, Sculpture Hall. Seven statements, seven squares nobody could stand on, and enough testimony that the surplus is what pins the last two down.
Cracked by 2 detectives so far.
A 6×6 grid across 4 rooms: Atelier, Courtyard, Locker Room, Life-Drawing Room. Nine statements, ten squares nobody could stand on, and enough testimony that the surplus is what pins the last two down.
Cracked by 4 detectives so far.
A 6×6 grid across 5 rooms: Sculpture Hall, Atelier, Locker Room, Gallery, Courtyard. Six statements, ten squares nobody could stand on, and no assumption anywhere: elimination alone closes it.
Cracked by one detective so far.
An 8×7 grid across 5 rooms: Atelier, Courtyard, Locker Room, Kiln Room, Supply Closet. Nine statements, fourteen squares nobody could stand on, and one round of assume-and-test after elimination ran dry.
Cracked by one detective so far.
A 7×7 grid across 6 rooms: Supply Closet, Locker Room, Gallery, Atelier, Sculpture Hall, Kiln Room. Eight statements, twelve squares nobody could stand on, almost as many rooms as suspects, so a room claim nearly names a square, and no assumption anywhere: elimination alone closes it.
Cracked by 5 detectives so far.
A 10×8 grid across 7 rooms: Supply Closet, Locker Room, Courtyard, Kiln Room, Print Room, Sculpture Hall, Life-Drawing Room. Thirteen statements, eighteen squares nobody could stand on, almost as many rooms as suspects, so a room claim nearly names a square, and one round of assume-and-test after elimination ran dry.
Cracked by 2 detectives so far.
A 9×8 grid across 7 rooms: Courtyard, Gallery, Sculpture Hall, Life-Drawing Room, Kiln Room, Atelier, Print Room. Twelve statements, sixteen squares nobody could stand on, almost as many rooms as suspects, so a room claim nearly names a square, and one round of assume-and-test after elimination ran dry.
Cracked by one detective so far.
A 9×9 grid across 8 rooms: Supply Closet, Kiln Room, Locker Room, Gallery, Courtyard, Life-Drawing Room, Print Room, Atelier. Nineteen statements, 22 squares nobody could stand on, almost as many rooms as suspects, so a room claim nearly names a square, and two rounds of assume-and-test after elimination ran dry — and one of the nine was lying throughout.
The twist: one suspect is an accomplice — every statement they make is false; the accusation also demands the motive, not just the name.
Cracked by one detective so far.
A 10×9 grid across 7 rooms: Supply Closet, Kiln Room, Print Room, Gallery, Life-Drawing Room, Sculpture Hall, Courtyard. Twelve statements, twenty squares nobody could stand on, and one round of assume-and-test after elimination ran dry.
The twist: the accusation also demands the motive, not just the name.
Cracked by one detective so far.
The grid size is the size of the crime scene, so a 10×9 expert case is a far larger search than a 5×5 beginner one — but the difficulty is really carried by the clues, not the square count. A beginner case tells you almost directly where somebody stood. An expert case tells you where somebody was not, three times, and expects you to do the rest — and on half of them one of those statements is a lie told to protect the killer. If a case lists a motive, naming the right person is not enough on its own; you have to prove why.
How to play · Solving cases with a liar · Techniques
Every day's cases — the calendar · ← the cases for 30 October