In this tutorial you will see how to create an extreme Sudoku puzzle for scratch. This is a four step process. We will be using Hodoku throughout this tutorial. The reason is Hodoku’s cell coloring features will allow us to keep track of what we have done and then indicate to us what we need […]
Creating an Extreme Sudoku Puzzle from Scratch Read More »
What is a link in a Sudoku puzzle? A Sudoku link is a logical relationship. Links are building blocks used in advanced puzzle solving techniques. Links are most used in chaining and looping techniques such as Remote Pair, X-Chain, Turbot Fish, X-Chain Variants (2-String Kite, Skyscraper, Empty Rectangle), XY-Chain, Nice Loop/AIC, Group Nice Loop/ AIC,
Different Types of Sudoku Links Read More »
Understanding what a house is in a Sudoku puzzle is a key element to understanding puzzle solving techniques. A “house” in Sudoku is a group of nine numbers of 1-9 where each number only occurs once. A house can be a row, column, or 3 x 3 block. There are 27 houses in a Sudoku
The 27 Houses of Sudoku Read More »
A Sudoku puzzle is composed of a 9 x 9 grid. The numbers already filled out in are called “givens”. Each number location is called a “cell”. In a 9 by 9 grid there are 81 cells. In this example the givens are colored in black. In this puzzle there are 27 givens filled out.
Sudoku Puzzle Definition Read More »
Every cell in a Sudoku puzzle is shared by three houses (one row, one column, and one 3 x 3 block). This is an extremely important concept to get about Sudoku puzzles. As an example, we are going to concentrate on cell R3C5 (row 3, column 5) outlined in black below: The three houses shared
Every Cell Shares in the Intersection of Three Houses Read More »