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Sudoku classic (9)

Sudoku classic (9)

25K plays 4.4 out of 5

Overview

Sudoku classic (9): is an intellectual puzzle that will challenge your logical thinking and attention. Your main objective is to fill the empty cells of the 9x9 game board with numbers from 1 to 9, following three simple yet strict rules. The board initially contains some hint numbers. Using logic and the method of elimination, you must find the only correct solution for the entire grid. Perfect for mental training, the game develops critical thinking, concentration, and patience. Challenge yourself by choosing difficulty levels from beginner to expert, and enjoy the elegance of this world-renowned number puzzle!

Videos and screenshots

  • Sudoku classic (9) screenshot 1
  • Sudoku classic (9) screenshot 2
  • Sudoku classic (9) screenshot 3
  • Sudoku classic (9) screenshot 4
  • Sudoku classic (9) screenshot 5
  • Sudoku classic (9) screenshot 6
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14,518 players online

How to play

  1. Open the game

    Press Play now and the game opens on its own screen.

  2. Follow the in-game instructions

    The controls and goals are shown inside the game as you play.

  3. Use the game menu

    The floating button over the game reloads it, saves it to your favourites, or takes you back out.

Game instructions

Your goal is to fill all the empty cells in the 9x9 grid with numbers from 1 to 9. Row: Each row must contain all the numbers from 1 to 9 without repetition. Column: Each column must contain all the numbers from 1 to 9 only once. 3x3 square: Each small square outlined in bold must be filled with numbers from 1 to 9 without repetition. Controls and gameplay To insert a digit: Click on an empty cell to select it, then click on a digit on the control panel. Editing modes (switch by the "Sterka" button): Green indicator (Notes mode): Allows you to insert multiple hint digits into cells. These are your notes. Red indicator (Clear mode): Click on any cell to completely clear all digits and notes in it. White indicator (Normal mode): Standard mode for inserting final digits (pen). Using a hint: Press the "Hint" button when a cell is selected. One correct digit will be inserted.

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