No trial evidence yet.
Answer a base Mental Rotation trial. Proper-rotation equivalence, mirror equivalence, rotation load and coarse cube-graph invariants are derived locally.
local onlysame legal engine
V0.300 · MENTAL ROTATION / GAME-FIRST 3D ROTATION TRAINER
Mental Rotation turn it in your head
Match proper 3D rotations, reject mirrors, and build speed without sacrificing accuracy. Choose Match Four, Mirror Rush, or Sprint 60 and play immediately.
One true rotation + mirror and changed-shape traps.
READY
UntimedTrain the rotation, not the page
Choose a mode and start.
READY
Press Start session.
Choose your mode and start.
Assist is optional and marks the round Assisted so clean PBs stay honest.
Guided rotation · Assisted
Drag the shape or use the buttons to learn a rotation path. Scored clean runs should be solved mentally.
Advanced tools · exact replay, Fixed 20, evidence & backup
Study the target. Press Start Round when you are ready; the response timer begins only then.
Target sculpture
Cubes—
Rotation load—
Response—
Local accuracy—
Clean best—
Daily streak0
Keyboard: Enter start · 1–4 choose · H 3-view assist. Using the assist marks that attempt Assisted; Clean bests come only from unaided correct solves.
Orthographic study views · Assisted
These front, right and top silhouettes come from the target’s exact voxel coordinates. They do not change the answer, but they make the structure easier to inspect.
Proper rotations only
The answer can use any of the 24 orientation-preserving rotations of a cube. Reflections are excluded, so a chiral sculpture never becomes its mirror just by turning it.
Near-miss distractors
Two wrong options preserve cube count and connectivity but relocate one cube connection. Feature counting alone is not enough; trace elbows, branches and handedness.
Deterministic replay
Practice URLs receive a stable seed and Daily uses the date. The same seed rebuilds the same source, viewpoints and answer position without a remote puzzle feed.
V0.207 · EXACT ROTATION EVIDENCE
Rotation & Repeatability Lab
Turn each solve into inspectable local evidence. The lab reuses the same exact rotation-equivalence engine as the base game, then separates proper rotations, mirror errors and changed-sculpture errors without inventing IQ, percentile or population claims.
Finish a base trial or start the fixed benchmark.
No reviewed trial yet.
Recent decisions will stay in this browser.
0/0
Five evidence families × four
Exactly four Easy rotations, four Standard rotations, four Challenge rotations, four mirror-control pairs and four changed-structure pairs. The same deterministic 20 repeats every clean run.
Clean 0/5Five uninterrupted fixed runs unlock repeatability.
No local V0.207 reviewed trials yet.
Rotation-load profileClean correct trials will appear by 1-turn / 2-turn / 3-turn median response.
Choose Fixed Rotation 20 or Adaptive Drill.
Portable local evidence
Display controls
These controls affect this browser only. Reduced motion does not change puzzle logic.
Local recent attempts
No local attempts yet.
Accuracy, clean bests, error types and Daily history stay in this browser. This is a practice game, not an IQ score or diagnosis.