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  1. 8. 9. Use 3D chains. Help with candidate chains. Click on any candidate in the board. The solver will set that candidate as true and turn false all the candidates it can see in the row, column and box. It will then look at all those in turn and follow every inference, ON, OFF, ON, OFF until it can go no further.

    • Daily SuDoku

      Load your own Sudoku into the player Enter a 81 character...

    • Printable Version

      Sudoku Solver by Andrew Stuart. Shows the logic behind...

    • Sudoku X Solver

      Welcome to my Sudoku X Solver. Sudoku X is a great variant...

    • Getting Started

      Last number in a row When you have scanned the boxes for...

    • 5 Daily Puzzles

      If you want to check the puzzles or are stuck you know there...

  2. Quick help: Using this Solver Use the "Import a Sudoku" button or type in a Sudoku puzzle in the small board. You can also pick examples from the list above. Click on Take Step to step through the solution. Unknown squares are filled with 'candidates' - possible solutions. Any cells that are reduced to one possible candidate are solved.

  3. Mar 26, 2024 · The culmination of nine years of development and community feedback, The Sudoku Solver by Andrew Stuart will work with you to help solve your trickiest puzzles. Features include: Included are all the strategy documentation and each example can be loaded into the solver at a click. - 364 Practice Puzzles containing examples of ...

    • (59)
    • Puzzle, Single player, Offline
    • Everyone
    • Syndicated Puzzles
  4. 2) Enter the numbers into the top left most cell for each cage. 3) Validate. To check you have entered a correct puzzle press validate. 'Cancel' will not save your design. All cages must add up to 405. Current total: Killer Sudoku Solver by Andrew Stuart. Shows the logic behind solving Killer Sudoku square by square.

  5. Str8ts Solver. Rows and columns are divided into compartments of white squares. Use single numbers to complete a straight for each compartment. A straight is a set of numbers with no gaps and in any order. No single number can repeat in any row or column.

  6. This page uses several fundamental techniques to solve any Sudoku that has a UNIQUE solution. This application will automatically cross-hatch scan. Optionally, you can turn on or off other methods. Red highlights will indicate that a particular value for a cell is not possible after the application of one of these techniques.

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  8. How to Play Sudoku. X. Enter numbers in the squares so that each row, column and box contains all the numbers 1 to 9 To enter notes via the keyboard simply type more than one number or prefix with '0' to note one number. Number pad mode: click on 'notes'. Del or 0 will clear a cell. Guaranteed a single solution - and a logical path to solve.

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