Calc Sudoku
Play Calc (KenKen) Sudoku free online: a 9x9 sudoku where every cell belongs to a cage whose digits are distinct and satisfy an arithmetic clue (sum, difference, product or quotient). Rows, columns and 3x3 boxes hold 1-9. No download, no sign-up.
Play Calc Sudoku
Tap a cell, then tap a digit 1-9 (or type on the keyboard). Tap the same digit again or press Erase to clear. Undo, Restart and Hint (3 per puzzle) are available. A cage's digits must be distinct and satisfy its arithmetic clue; a cell that breaks a row, column, box or cage constraint is highlighted. Subtraction and division cages follow the KenKen convention (largest value minus/divided by the rest).
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Objective: Fill every cell with 1-9 so each row, column and 3x3 box contains 1-9 exactly once, and the digits inside each cage are distinct and satisfy its arithmetic clue (the cage's sum, difference, product or quotient). Single-cell cages carry the digit itself. Each cage is outlined with a thick border and shows its operation and target in its top-left cell. Controls: Mouse/touch: click/tap a cell, then a digit button. Keyboard: arrow keys to move, 1-9 to enter, Backspace/Delete/0 to clear, or click the on-screen pad.
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Source and license
Calc (KenKen) Sudoku is a Playnesta-original implementation. The rules engine (engine.js: 9x9 sudoku validity plus cage arithmetic and cage-distinctness constraints), the puzzle library (puzzles.js: 9 frozen puzzles across 3 tiers, generated offline by outputs/gen-calc-sudoku/gen.js), the page shell (index.html), the stylesheet, the analytics bridge and the touch shim are all Playnesta-original and released under the MIT license (see LICENSE.txt in the package). No upstream code, artwork, audio, font or network asset is redistributed. Playnesta Games is the developer and publisher of this web implementation. https://www.playnesta.com/playables/calc-sudoku/index.html · MIT
Game facts
- Developer
- Playnesta Games
- Publisher
- Playnesta Games
- Genre
- Puzzle, Logic
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Last verified 2026-10-24 20:30 UTC. Information can change; follow the linked source for the latest details.