Ruleglass Laboratory

An optional fourth inference laboratory requires exactly one adjacent duplicate with no other repeats. It extends the sequence-rule curriculum; accepted/rejected examples support discovery, not a revealed answer.

Draw an orthogonal route from S with the requested number of cells. Compare its symbol sequence with the accepted and rejected examples, then submit an experiment. Each accepted route opens a new lab with a different hidden rule. Rejected trials give length and rule lights without ending play. Clear or Undo revises any trial.

Tap or click the controls. Keyboard: Tab and Enter/Space operate every button; arrows/WASD move where available, R restarts, Z undoes calm puzzles.

Mistakes remain revisable. Unlimited undo and restart recover deadlocks.