A number trail

Start at 1. Choose a square sharing a side.

The whole rule: consecutive numbers, side-touching squares, every square once. Printed clues stay fixed. No timer. A wrong turn can be undone.

Why this turn? ↗

Keyboard, hints and paper play

Tab to a square and use Enter or Space to place the next number. Arrow keys move focus between squares. Each square can also be reached with Tab. Undo removes the last step. A clue points to the next square without filling it. If an earlier turn is wrong, the clue tells you where to reconsider.

The browser fills forward from 1. On paper you can work forward or backward from any clue. Progress stays in this browser tab while you move between puzzles or reload. Closing the tab clears it. If tab storage is unavailable, keep the game page open until you finish.