Which technique is used to solve the Sudoku problem?

The Sudoku Assistant uses several techniques to solve a Sudoku puzzle: cross-hatch scanning, row/column range checking, subset elimination, grid analysis,and what I’m calling 3D Medusa analysis, including bent naked subsets, almost-locked set analysis.

Is there a pattern to solve Sudoku?

Using patterns is another way to help you solve sudoku puzzles. Patterns are similar to techniques; they are another “tool” in your toolbelt. They could be listed on the techniques page but since there are many patterns they are listed in their own section.

What is a matching locked candidate in Sudoku?

Locked Candidates 1: Sometimes a candidate within a box is restricted to one row or column. Since one of these cells must contain that specific candidate, the candidate can safely be excluded from the remaining cells in that row or column outside of the box.

What is the best way to use a Sudoku puzzle?

The best way to work through a Sudoku puzzle is to tackle the Direct Solves first, since they are the easiest. In fact, all easy-level puzzles can be completed using only Direct Solves. With more difficult Sudoku puzzles, you will reach a point at which Direct Solves no longer exist. At this stage, you

What is a unique candidate in a Sudoku board?

You know that each block, row and column on a Sudoku board must contain every number between 1 and 9. Therefore, if a number, say 4, can only be put in a single cell within a block/column/row, then that number is guaranteed to fit there. This example illustrates the number 4 as the unique candidate for the cell marked in red.

What is crosshatching in Sudoku and should you try it?

Crosshatching can be especially useful for brand new Sudoku players who are overwhelmed with an entire grid to fill. The downfall is that you could find yourself going back to correct a lot of errors as the puzzle gets more filled in. This doesn’t mean it’s a bad technique.

What is the difference between a row and column in Sudoku?

While solving the sudoku puzzle you can only use each number one time in the square, column, and row. Columns and rows are not limited by the thicker boundaries of the square (also sometimes called a region.) They run from the top of the puzzle to the bottom of the puzzle (as pictured in blue above). The same is true of rows.