Cobalt

Games

Sudoku

Play 600 original Sudoku puzzles, 200 at each of three difficulties, each with exactly one solution. Pencil notes, undo, an optional mistakes check, and saved games survive reopening.

Version
1.0.18
Permissions
No additional permissions
Requires
Cobalt 0.3.31
Install on your Kobo

Source code on GitHub

An original Sudoku puzzle with pencil notes, selected keys and a highlighted row and column
Sudoku: Completed
Completed
Sudoku: Game
Game
Sudoku: Landscape
Landscape
Sudoku: Recovery
Recovery

New in 1.0.18

A saved game that cannot be read now says why with Try again right under it, Retry saving replaces Retry save, and New game puts Easy, Medium and Hard side by side where they fit.

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On your Kobo, open App Store, tap the globe in the top bar and choose Link browser. Scan the QR code, or enter the pairing code and verification key.