Oddorithm

Oddorithm starts with an optional 24-question reasoning test: figure grids, number series, turned shapes and figure analogies. Each part opens with a worked example and runs from easy to hard, with no timer and no hints. Finish it to see your estimated IQ, a likely range, how you compare with the average and your strongest kind of reasoning, with a card to share. A short test, not a clinical assessment.

Then explore four calm logic puzzle chambers. Take the test and play the Pattern Foundry free in your browser, then get the full game for Mac, Windows and Linux.

Four chambers

Pattern Foundry. Study changing panels and rebuild the missing one. Move, rotate and flip a glyph, then adjust its studs. Later puzzles link the dart's direction to its next position.

Prism Workshop. Arrange mirrors and splitters to guide light into receivers. Some accept light only through an open side, and the red eye must stay dark. In calibration, plan the path before you fire.

Echo Array. Follow a history of drops, swaps and ring turns. One event is missing. Use the visible sockets in the final ring to work out what happened.

Constraint Cabinet. Place shapes and lettered tags in four drawers. Each clue card sets a condition: same drawer, not together, left of, or next to. Later puzzles require ruling out placements that first seem possible.

What you get

The complete calibration has sixteen scored puzzles across the four chambers. Finish them to see your Mind Index and Mindprint, a game score separate from the estimated IQ.

Tutorials, practice puzzles, collection samples and a daily experiment. Settings include reduced motion and high contrast. Plays in English, French, German, Spanish, Italian, Dutch, Brazilian Portuguese, Japanese, Korean and Arabic. No ads, analytics, tracking or account; the game plays offline.

Demo and full game

• The browser demo has the full reasoning test and the Pattern Foundry. It saves progress in your browser where supported; browser settings may remove it, and it does not carry over to the full game.
• The full game (4.99 USD) is a download for macOS 11 or later (Apple silicon and Intel, signed and notarized), Windows 10 or later (64-bit) and Linux (64-bit). It has the reasoning test, all four chambers, the Mind Index and every puzzle.
• Buying here gives the desktop downloads. The Android version is in closed testing on Google Play, and the iPhone version is not out yet; both are sold separately.

Music by Abstraction, from the Music Loop Bundle (CC0).

Made by Lanternbench. Support: lanternbench.com/oddorithm/support.