The Portal · 8 Released Cases

Out-deduce the machine.

These are the first eight mysteries from the benchmark — the same case files we handed to frontier models. Every clue you need is on the page. The author swears it.

We do not publish the official solutions. Read a case, reason it out, and submit your answer — it goes straight to the benchmark authors. Beat the best AI score on the card.

The Whirlpool House Affair

A revolving octagonal cult temple, a beheaded founder, a vanished child, and a fire that always starts in the same room.

Locked RoomImpossible CrimeSpatial

The Geometry Inn

Six students draw keys to rooms shaped as regular polygons in an abandoned haunted inn; one never comes back out alive.

Locked RoomSpatialLogic

The Tale of the Aoandon

At a hundred-candle ghost-story night, a collector confesses to an old murder — then is found slain by dawn.

closed-circlealibiwhodunit

The Magic Door Murders

A priest is found stabbed in a sealed mine reachable only through paired teleporting doors that work by day.

locked-roomimpossible-crimefantasy-rules

The Londinium Banquet

A Russian princess and five others burn to death in a sealed box; who climbed the spiral stair?

locked-roomimpossible-crimepolitical-intrigue

Nisemono Maniac

An accidental reincarnator who can copy any face must unmask the Master among six flawed power-users.

fantasysuperpowersimpossible-crime

RPG JUMP

Six players, sealed temples, and a 50-minute teleport rule. Two are dead. Who could have moved to kill?

Closed CircleSpatialLogic

(Not) Random Ball-Drawing

A 'pure luck' ball-drawing relay, a half-glimpsed scoreboard, and a color-blind teammate hide a guaranteed-win strategy.

ProbabilityCombinatoricsLogic

???

More Cases Coming

Additional mysteries from the benchmark will be released here as the study progresses.

Coming soon

Not yet released