MathLogic
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Sudoku Guru - classic sudoku

Sudoku Guru - classic sudoku offers thousands of 9x9 puzzles on five levels from easy to guru, with daily challenges, notes and trophies. Free online.

Falls under: Logic Games, Puzzles — this game trains logical reasoning and deduction, spatial reasoning and puzzle-solving.

How to play Sudoku Guru - classic sudoku

  1. Fill each empty cell with a number from 1 to 9.
  2. Don't repeat a number in any row, column or 3x3 box.
  3. Use notes to mark candidate numbers on harder puzzles.
  4. Pick a difficulty from easy to guru and try the daily challenge.

About Sudoku Guru - classic sudoku

Sudoku Guru - classic sudoku is the traditional number puzzle with plenty of depth. Fill the 9x9 grid so that every row, every column and every 3x3 box contains the numbers 1 to 9 exactly once. There are thousands of puzzles across five difficulty levels, from easy up to guru, so beginners and seasoned solvers both have something to work on. Daily challenges and trophies reward regular play, and a statistics screen tracks how you're improving. On the harder grids, the built-in notes let you pencil in candidate numbers, which is the key to solving without guessing.

Sudoku Guru - classic sudoku FAQ

What are the rules of Sudoku?

Fill the 9x9 grid so that each row, each column and each 3x3 box contains every number from 1 to 9 exactly once.

How many difficulty levels are there?

Five, starting at easy and going up through medium, difficult and expert to guru, with thousands of puzzles in total.

How do notes help?

Notes let you write small candidate numbers in a cell. On hard puzzles, tracking candidates is how you find the next certain number without guessing.

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