Calcudoku

Fill each row and column with 1 through the board size, once each. Bold cages meet their arithmetic target. Digits may repeat in a cage unless they share a row or column. Singleton clues stay fixed.

Choose 4, 5 or 6 Easy, or 6 Medium. Other New choices have not qualified; existing codes reopen independently. Default: 4 × 4 Easy.

Choose a Calcudoku puzzle

Full rules, original worked lesson and printing · Daily Calcudoku · Published archive · All puzzles and saved boards