Play Extreme Sudoku Online - Ultimate Logic Challenge

Face the ultimate Sudoku challenge with our extreme difficulty puzzles! Master-level logic puzzles for elite players. Click a square to select it, then choose a number to place.

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How to Play Sudoku

  1. Objective: The goal is to fill the 9x9 grid with numbers so that each row, column, and 3x3 section contains all digits 1–9.
  2. Gameplay: Click an empty cell to select it, then use the number palette to place a digit.
  3. Controls: Use Undo to revert your last move or the Erase (⌫) button to clear a selected cell.
  4. Winning: When all cells are correctly filled, you’ve solved the puzzle. Use Check to validate.

Extreme Sudoku - The Ultimate Challenge

Extreme difficulty Sudoku puzzles represent the pinnacle of logical thinking challenges. These diabolical puzzles are designed for master-level players who seek the most intense mental workout possible.

Master-Level Techniques Required

What Makes Extreme Sudoku Special?

Are You Ready?

Extreme Sudoku is not for the faint-hearted. These puzzles require: