# Sudoku and candidate

You'd like to translate the site send an email to: solving methods 2- locked candidates the preceding methods permitted to directly assign a value to a cell. Sudoku is defined in terms of its rows, columns, boxes these are sometimes referred to as the original 324 constraints or sets of candidates. This is the first technique which doesn’t actually tell you where to place a number, but instead helps you to determine places where you can’t place a number. The mathematics of sudoku tom september 13, 2012 1 introduction sudoku is a puzzle presented on a square • a “candidate” is a number that could possibly. The mathematics of sudoku tom davis [email protected] (preliminary) november 15, 2010 1 introduction sudoku is a (sometimes. A description of locked candidates - a basic sudoku solving technique. Hobbylark » puzzles upgrade if you have derived all of your choices through sudoku logic and so the other candidate in the original pair must be correct and.

Sudoku: play and solve your grid by penciling in the candidates with verification of the grid. Chapter 2: playing the game table of contents creating a sudoku or entering givens the second case (eliminating a candidate makes the sudoku harder). Sudoku helper - howto for sudoku solving technique candidate instructions and examples for the sudoku solving technique candidate. How to play fill the grid with your keyboard so that every row, column and 3×3 box contains the digits 1 to 9, without repeating navigate the grid with the arrow. The almost locked candidates, or alc, technique refers to a line-box intersection and a set of digits s such that. Sudoku solving tactics terminology: we call any row, column, or 3x3 box in the sudoku grid a group candidate highlighting: throughout this discussion.

The only way to successfully crack a sudoku you can work your way to finding the sole candidate for a particular cell by writing down all possible cell candidates. Brief review of important candidate reduction methods in sudoku. What is sudoku - page 1 sudoku terminology a backdoor more or less refers to a scenario in which the puzzle can be solved through the use of a single candidate. There is only one rule to completing a sudoku: each 3x3 box, each row and each column show candidates and invalid values, next vague or concrete hints.

Naked triple technique moderate sudoku puzzles again may require every technique discussed before additionally we add two new types called candidate lines and. Single candidate works by looking at a particular square and working out which numbers would be valid candidates for that cell if that cell only has one valid.

## Sudoku and candidate

If we were able to eliminate candidate 1 from r6c1, the sudoku must either be unsolvable or have 2 solutions. Every sudoku puzzle will have cells that have only one possible candidate if there aren't any other candidates showing, sudoku players call this a naked single.

- A beginner’s guide to solving sudoku puzzles our next task is to start eliminating candidate values in the entries that are lists of numbers in x.
- Solving a hard sudoku puzzle will require quite a different set of techniques compared to an easy one this article presents nine such techniques sole candidate.
- Sudoku is a logic-based puzzle for each blank, the solver can build a candidate bank, a list of all the numbers that meet the known constraints.
- Sudoku helper - howto for sudoku solving technique nakedcandidates instructions and examples for the sudoku solving technique nakedcandidates.
- Squares in a sudoku grid with only one valid candidate are called naked singles they are sometimes called sole candidates or singletons.

This idea is more fully discussed mathematically in the 12 rules of sudoku row/column range checking (locked candidates) examples: the locked candidate rule, form 1. Basic techniques before starting on the techniques, make sure that you are familiar with how to play sudoku (unique candidate. There are 81 cells in a normal sudoku and they all belong to one row, column and box that 'non-chain' candidate can be excluded. This technique is very easy – especially if you’re using pencilmarks to store what candidates are still possible within each cell if you’ve managed to rule out.