Sum Sudoku
Play Sum Sudoku free online — cage-sum sudoku. Every cage must add up to its clue and digits never repeat in a row, column, box or cage. Fresh puzzle every round. No download, no sign-up.
Play Sum Sudoku
How to play
The basics
Tap a cell, then tap a digit 1-9 (or type it). Mistakes that break a row, column, box, cage or sum are rejected and counted. Tap Erase to clear a cell; tap New for a fresh puzzle.
Objective:
Fill the 9x9 grid so every cage adds up to its clue with no repeated digit in any row, column, 3x3 box or cage. Single-cell cages are givens. Any fully consistent grid wins.
Controls:
Mouse/touch: tap a cell, then a digit; Erase clears; New deals a fresh puzzle. Keyboard: type digits directly.
Play Sum Sudoku free online — cage-sum sudoku. Every cage must add up to its clue and digits never repeat in a row, column, box or cage. Fresh puzzle every round. No download, no sign-up.
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Source and license
Sum Sudoku is a Playnesta-original cage-sum sudoku (MIT). The solved-grid builder (shuffled base pattern), the random cage partitioner (growth merges capped at 5 cells with solution-digit distinctness), cage-sum clues, entry validation (row/column/box uniqueness, in-cage distinctness, running-sum caps, full-cage exactness), win detection (any constraint-satisfying grid is accepted), timer and best time are all Playnesta-original. 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/sum-sudoku/index.html · MIT
Game facts
- Developer
- Playnesta Games
- Publisher
- Playnesta Games
- Genre
- Puzzle, Logic
Playnesta guides
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Last verified 2026-11-02 14:00 UTC. Information can change; follow the linked source for the latest details.