MellowTap300 SINGLE-LOOP PUZZLES

Loopy

A little line of thought.

One loop. No loose ends.

Draw a single closed loop along the grid.
Each number counts the lines around its cell.

300 fixed boards · 4×4, 5×5 and 6×6 · no timer
Easy / Normal are generator tiers, not human ratings.

Opening your local puzzle…

Choose a loop

75 boards per profile. Easy / Normal name the upstream generator’s logic tier, not measured human difficulty. Browsing keeps your puzzle unchanged.

One continuous loop

  1. Draw one closed loop. Use the edges between the dots. No loose ends, branches, touching loops or separate loops. Every used dot has exactly two lines.
  2. Match each clue. A 3 needs three of its four sides drawn; a 0 needs none. Blank cells have no count. The loop does not have to visit every dot or surround every clue.
  3. Use the large controls. Tap a whole cell, choose Top, Right, Bottom or Left, then tap Line, Cross or Clear. The amber dashed edge is selected. Choosing a cell or side changes no marks. The outer perimeter is playable; a shared edge belongs to both neighboring cells.
  4. Cross means “not a line.” Crosses are optional notes. You can change Line directly to Cross or Clear. Mistakes are allowed: the game does not solve ahead. Undo restores the previous marks.
3

Three lines satisfy this clue.
That alone does not finish the loop.

Keyboard: Tab to the board; arrow keys move focus. Enter / Space selects the focused cell. Tab to a side, then a mark button; Enter / Space activates it. U undoes while on the board. Escape deselects. Home / End move within a row.

The last 128 edits are kept for Undo. Best counts successful mark changes and Undo. Restart clears this attempt but retains previous completion and best. “Completed before” is history, not proof that the current board is solved. There is no timer.

This game keeps progress in its own isolated database. Other games’ saves are never read, changed or migrated. Saving failures are visible. Explicit tab-only play never reconnects or copies back. Refresh or close can lose pending edits; browser warnings and crash durability are not guaranteed.