MellowTap300 FIXED PUZZLES
A LITTLE ATTRACTION

Magnets

Opposite poles. Quiet spaces. A balanced board.

Opening your local puzzle…

A little space to think

300 fixed boards with independently verified unique solutions. Groups show dimensions, not difficulty. Human difficulty is not yet calibrated.

Browsing or going back keeps your current puzzle unchanged.

A little attraction.

  1. Every outlined pair is a fixed domino. Give it one + and one −, or mark both ends neutral ○. A dot · means undecided and is not a finished neutral. A shaded single cell marked “fixed” is always neutral.
  2. Tap a cell to select its endpoint and whole domino. Choose + here or − here to put that pole at the selected endpoint; its partner automatically gets the opposite pole. Neutral changes both ends. Clear returns both to undecided. Tapping or inspecting alone never places anything.
  3. Counts marked + above and left count positive poles in that column or row. Counts marked − below and right count negative poles. 0 means none; — means no clue is given. The readout below the board keeps selected row/column counts visible while you scroll.
  4. Equal poles may not touch edge-to-edge. Opposite poles may touch. Diagonals and neutral cells do not repel. Orange ! marks flag equal-pole contacts or a supplied count that is exceeded (or mismatched on a fully decided board). No warning does not guarantee your partial board can be solved.
  5. Decide every domino and satisfy every given count without equal-pole contacts. A green matching clue is only a count check, not a win. Current completion is recalculated after every edit, Undo, Restart and restored state. “Completed before” is separate history.

Scroll inside wide or tall boards; cells remain 44 CSS px. The read-only Overview shows the whole board without shrinking tap targets. Keyboard: Tab to the board, arrows to move focus, Enter or Space to select. Home/End move within a row. After selecting, use Shift+Tab back past the board scroller and Overview to reach the four explicit controls, then Enter or Space to apply one. Escape deselects. No right-click or long-press is needed.

Undo keeps the last 128 edits. Restart clears this attempt and Undo, but keeps prior completion and best edit count. Undo counts as an edit. There is no timer, solve button or answer hint.

This library has 300 unique-solution boards. Dimensions and clue density vary; human difficulty and pacing have not been calibrated.

Progress uses a dedicated Magnets IndexedDB database. Other games’ progress is never read or changed. Saving failures are visible. Tab-only play never reconnects or copies temporary progress back. Refresh/close can lose pending edits; browser warnings and crash durability are not guaranteed.