Magnets
Fill every domino with a magnet or a blank so each clue counts true
- Placed
- –
- Tap places
- Magnet
Click a domino, or select it and press Enter, to place a magnet with its + in that square; again flips it, then clears it. Right-click, or press Space, for a neutral domino, then a “?” for “not neutral”, then clear. On a touch screen, Magnet and Neutral choose what a tap does. Click a clue, or press Shift with an arrow for the clue at that end of the row or column, to cross it off. Ctrl or ⌘ Z undoes; Shift Z redoes.
Progress saves on this device.
How to play
The grid is cut into dominoes. Fill each one with a magnet, which has a + pole in one half and a − pole in the other, or with a neutral block.
The numbers along the top and left count the + poles in that column or row; the numbers along the bottom and right count the − poles. Two like poles may never touch side by side, though a neutral half may sit next to anything. Harder puzzles leave some clues out.
A “?” notes that a domino is a magnet whose way round you do not know yet. Cross off a clue once you have used it.
Touching like poles and broken clues turn red with a dashed ring. Undo and Redo follow your history; a new move after Undo replaces the old branch. Restart empties the board and can be undone. Solve reveals the answer; a puzzle finished with Solve does not count as solved.
Engine: Simon Tatham’s Magnets, from the Portable Puzzle Collection, contributed by James Harvey. MIT license and credits.