Key Details of Conceptis SumSudoku

  • Killer Sudoku variation.
  • Last updated on July 22, 2024
  • There have been 7 updates
  • Virus scan status:

    Clean (it's extremely likely that this software program is clean)

Enlarged image for Conceptis SumSudoku
Conceptis SumSudoku 0/4

Developer's Description

Killer Sudoku variation.

SumSudoku, also known as Killer Sudoku, are addictive logic puzzles best described as a cross between Sudoku and Kakuro. Using pure logic and simple add/subtract calculations, these fascinating puzzles offer endless fun and intellectual entertainment to puzzle fans of all skills and ages.

Each puzzle consists of a 9x9 Sudoku grid containing areas surrounded by dark borders. The object is to fill all empty squares so that the numbers 1 to 9 appear exactly once in each row, column and 3x3 box, and the sum of the numbers in each area is equal to the clue in the area's top-left corner. In addition, no number may be used in the same area more than once.

The game includes helpful features such as showing possible sum number combinations in an area and pencilmarks to make temporary placement of numbers in the grid.

For more fun, Conceptis SumSudoku includes a Weekly Bonus section providing an extra free puzzle each week.


90 free SumSudoku puzzle samples

Extra bonus puzzle published free each week

Multiple difficulty levels from easy to very hard

Puzzle library continuously updates with new content

Manually selected, top quality puzzles

Unique solution for each puzzle

Hours of intellectual challenge and fun

Sharpens logic and improves cognitive skills


Concurrently playing and saving multiple puzzles

Puzzle library sorting and hiding options

Portrait and landscape screen support (iPad only)

Pencilmarks feature for solving hard puzzles

Show possible sum combinations option

Lock number on keypad option

Highlight Excluded Squares option

Unlimited Undo and Redo

Show conflicts during gameplay

Check puzzle

Track puzzle solving times


Conceptis SumSudoku have also become popular under other names such as Killer Sudoku, Sumdoku and Sumoku. All puzzles in this app are produced by Conceptis Ltd. - the leading supplier of logic puzzles to printed and electronic gaming media all over the world. On average, more than 20 million Conceptis puzzles are solved each day in newspapers, magazines, books and online as well as on smartphones and tablets across the world.

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