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Calcudoku

A math-based logic puzzle combining Sudoku rules with arithmetic. Fill each row and column with unique digits while satisfying cage constraints.

Difficulty Levels

4×4
Easy
6×6
Medium
7×7
Hard
9×9
Expert

Quick Rules

  • 1.Fill each row with digits 1 to N (where N is the grid size)
  • 2.Fill each column with digits 1 to N
  • 3.Each digit appears exactly once per row and column
  • 4.Cages show a target number and operation (+, −, ×, ÷)
  • 5.Digits in each cage must combine to equal the target