Total Sudoku is a free online Sudoku game built for a quick first puzzle or a longer logic session. Start directly in the grid, use notes and hints when you need them, and return to the same browser whenever you want another challenge.
The home board opens in Colour Sudoku: the familiar 9x9 logic puzzle translated into a clear palette. It has the same row, column, and region rules as classic Sudoku, but gives visual solvers a different way to read the board.
Switch between Colour, Classic, Mini, Killer, Jigsaw, and Mathdoku without changing the core habit: eliminate possibilities until one answer remains. Classic keeps the traditional 3x3 boxes, Mini compresses the pace into a 6x6 grid, Killer adds sum cages, Jigsaw uses irregular regions, and Mathdoku combines logic with arithmetic targets.
Each mode has its own playable page, so a player looking for a daily Classic Sudoku, a Killer Sudoku cage puzzle, or a short Mini Sudoku can land on the version that matches the session they want.
Good Sudoku solving is deliberate rather than lucky. Scan rows, columns, and regions for the missing value, use candidate notes for unresolved cells, and confirm one forced placement at a time. The How to Play and Training pages explain techniques such as scan one, scan two, naked singles, and naked pairs with interactive examples.
Daily puzzles give everyone the same board to solve, while the leaderboard lets you compare completed runs by mode. Versus is there for a friendly shared challenge when you want to send a lobby code and play alongside someone else.
No account is needed to begin a daily web puzzle. Create one when you want to keep a profile, save more progress, or move between Total Sudoku on the web and mobile app.
Pick one row, column, or region with the fewest empty cells. List what is missing, rule out values already present, and place only the answer that fits. When the grid feels busy, focus on one colour or digit across the whole board before moving to the next.