Solve Some Sudoku Puzzles

We’ve covered some of the basic methods of solving Sudoku puzzles on other pages here. Now it’s time to practice some. Thanks to a program named Magnum Opus, that is possible here.

Magnum Opus is a program that allows you to both build and solve a large number of puzzle types including crossword and Sudoku and many more puzzle types. I’ve used it to create the seven Sudoku puzzles shown here…

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Solving Sudoku Part 5

We’re almost at the end of this series of posts now. Here’s where we left off…

Two more rows.

We just filled in the two marked rows and now need to move to the rest of the puzzle. [Read more…]

Solving Sudoku Part 4

Last post we left the puzzle looking like this…

Where we stand now.

Where would go next? [Read more…]

Solving Sudoku Part 3

We left off last time finishing all the horizontal and vertical gimmies in the puzzle. These are the numbers that it takes little effort to find. Remember the technique (check rows and columns of containers for duplicates and then see if the remaining container has a unique position for the number in question) as you will use it throughout the puzzle solution. Every number you put into the puzzle should trigger another gimmie search  in both the horizontal and vertical directions for the container in question.

OK, now where to we go? [Read more…]

Solving Sudoku Part 2

This is the second in a series about the Sudoku puzzle and some of the solution methods. In the last post the puzzle was defined and the rules for solving were shown. In summary, you have a 9×9 array of squares that have to be filled with numbers such that each row, column and container contain one through nine with no repeats.

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Solving Sudoku Part 1

Sudoku? Why Sudoku and what is Sudoku? (By the way, it’s pronounced “Sue doh’ coo”.)

Sudoku is mostly seen as a number puzzle in newspapers. It’s basically a logic puzzle and has nothing to do with math. That’s important to understand as I’ve asked many people if they solve Sudoku puzzles and the almost universal answer when they say “no” is because they are not good in math.

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