How to Play
The grid is divided into domino-shaped slots (pairs of cells). Each domino can be either a magnet (one + and one -) or blank.
The numbers on the top and left edges show how many + poles appear in that column/row. Numbers on the bottom and right show how many - poles.
Same poles (+ next to +, or - next to -) cannot be orthogonally adjacent.
A dash (-) means no constraint for that row/column.
Click a cell to cycle: empty → + → - → empty.