Calcudoku

How to play

A 4×4 KenKen-style logic puzzle. Fill every row and column with the numbers 1 to 4, no repeats — and make every bold-outlined cage's numbers combine to its clue using the shown operator.

Rules

  • Click a cell to select it, then click a number on the pad below (or type it) to fill it in.
  • Each bold-outlined cage shows a target number and an operator in its top-left cell.
  • The numbers in a cage must combine with that operator, in some order, to reach the target.
  • Fill the whole grid with no repeats in any row or column, matching every cage's clue, to win.

Tips

A 2-cell cage marked with ÷ can only be two numbers where one divides the other evenly — in a 1–4 grid that's always [4,2] or [2,1]. Solve those first.