- The sudoku grid consists of nine horizontal rows, nine vertical columns, and nine 3 x 3 blocks (also called boxes).
- Rows, columns and block are all kinds of unit.
- There are twenty-seven units in a grid.
- Every unit contains nine cells, and every unit must contain the digits 1 through 9.
- Cells that share a unit (row, column or block) are called buddies.
- The numbers already in the grid are the puzzle's clues.
- The numbers you add, as a player, are "big numbers".
- When you have an empty cell, the numbers which could go into it according to the rules of the game are the empty cell's candidates, also known as pencil-marks.
- Rows are numbered 1 to 9, top to bottom. Columns are numbered 1 to 9, left to right. Blocks are numbered 1 to 9, in this layout:
1 2 3 4 5 6 7 8 9
- Overview
- Screen Shot
- FAQ
- Upgrade
- Change History
- Translations
- User Comments
- Buy
- Printable Grids
- Solving Techniques
- Glossary
- Links
| What People Say |
|---|
 I love using your Sudoku program. I have several others but yours is my favourite and I play at least one game with it every day. The others get used rarely.  John Hill, Australia |
| More » |
Copyright © 2000-2009 Simon Armstrong. All Rights Reserved.
Last Update
2009-09-14