Brief review of important candidate reduction methods in sudoku. 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 candidate, then we can conclude that the value of that cell must be that single valid candidate. 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. How to solve sudoku puzzles quickly and for many who are new to sudoku penciling in is the process of writing down all possible cell candidates in the.
Let sudoku swami turn you into an expert methods for finding cells where there is only one possible candidate remaining speed sudoku (to be completed at. 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 nakedcandidates instructions and examples for the sudoku solving technique nakedcandidates.
For a sudoku solving algorithm in other words, you check which numbers may go in a certain cell if there is only one candidate, then you enter that number. Advanced features of the sudoku instructions program: candidate table, find single candidate and candidate reduction methods.
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 keys or your mouse clear entries with delete or backspace. Discover sudoku online with 3 game modes (value, mixed and candidate) who can put the numbers easily there is an automatic backup system and it is also possible to undo last move.
Squares in a sudoku grid with only one valid candidate are called naked singles they are sometimes called sole candidates or singletons. Sudoku: play and solve your grid by penciling in the candidates with tips tip on one or more boxes for your sudoku grid at multiple choice method:.
The following technique is only a tad more difficult than the first beginner tips it involves applying the rules an additional time this technique is often called column, box, row interactions. The almost locked candidates, or alc, technique refers to a line-box intersection and a set of digits s such that:. 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.
Sudoku tips for beginners however, the only real way to learn these tips is to play many games of sudoku naked single candidates (naked singles). 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:. Sudoku helper - howto for sudoku solving technique candidate instructions and examples for the sudoku solving technique candidate.Download