Magnets

Game Rule: Fill each domino shape with either a magnet (consisting of a + and − pole) or a neutral domino (green). The number of + poles in each row and column must match the numbers along the top and left; the number of − poles must match the numbers along the bottom and right. Two + poles may not be orthogonally adjacent to each other, and similarly two − poles. Left-click a domino to toggle it between being empty and being a magnet.