Magnets
Can I leave a domino blank in Magnets?
Yes. Each outlined domino is either a magnet with one + and one −, or a neutral blank pair. Equal poles cannot share an edge. Row and column clues count positive and negative poles separately.
Worked example
Two neighbouring neutral cells do not repel each other. Do not force a magnet into every outlined pair merely to fill the board.
What to check on your board
Apply the rule above to your current board, then verify the remaining puzzle constraints. The example explains a local deduction; it is not a solution to every randomly generated board.
Checking your next move
Check each outlined pair as one decision: two opposite poles or two neutral cells. Next count positives and negatives separately in its row and column. Before fixing a pole, inspect its edge neighbours for the same sign; diagonal proximity alone is not that conflict.
Using this reference
For Magnets, read the rule and the worked example together before opening the game. Separate what the rule explicitly requires from what only seems likely on the current board. A useful next move is one you can explain from the visible constraints, not merely a pattern that looks familiar.
If you get stuck, isolate a smaller part of the position and list what is still possible there. After a move, check the affected rows, regions or connections again. The reference explains the documented rules; progress, controls and save behavior belong to the linked game.
Read the developer’s manual ↗ · Open the developer’s browser version ↗
Manual inspected: · Simon Tatham & contributors · MIT