Meet your puzzle companion
A little focus.
A good day.
SudokuDog is a quiet place to work things out. No ads, no countdown to hurry you, and a helpful nudge when you need one.
Find your next puzzle →One game, your way
Choose a difficulty, switch between three board styles, and keep your place as you go. Pencil in notes, ask for a hint that explains the logic, or replay the path you took.
Part of the FCC family
SudokuDog grows out of FCC Sudoku, which remains available. They share a puzzle engine and FCC accounts, while keeping separate saved games, records, and histories. Sign in to resume your SudokuDog games across devices. Playing here does not change your FCC Sudoku game. Each website needs its own sign-in; guest progress stays in the browser where you played.
On your favorite screen
Play here on a phone, tablet, or computer. You can add SudokuDog to your home screen for an app-like window. Our native iPhone and iPad edition is in preparation.
Help it grow
For now, the best support is to share a puzzle with a friend and tell us what could be better. The game is free, with no ads or purchases.
Version 1.0.1 · Web edition