Overview
plus-puzzle wraps arithmetic into clean spatial logic. Rows and columns demand sums that match target clues, and placements obey both math and adjacency rules. You start with anchors—the largest or smallest values that constrain a line—then fill with combinations that leave valid remainders. Visual clarity and consistent feedback make trial feel like reasoning rather than guesswork. The rhythm is satisfying: a row locks, a column resolves, and the grid sheds ambiguity calmly. It’s a small classroom of inference dressed as a tidy board, and finishing puts the nice click of math meeting shape.