Sodoku Puzzles

The Sodoku puzzle is a logic game using numbers 1-9. It came to western world an year ago (2005). Read the history of this game in wikipedia.org.

The Rule

Every Column, Row and 3x3 box contains digits 1-9. No duplicates and no missing numbers.

Tips

Use logic and reasoning instead of guessing a number. Here is a step by step tutorial from soduko.org

Some tough ones to crack.

Puzzle 1and 2

The Know the Game

1. The Times Online - History http://www.timesonline.co.uk/article/0,,2-2208881.html

2. Mathematics behind the game - http://www.phil.uu.nl/~oostrom/cki20/02-03/japansepuzzles/ASP.pdf

3. BBC News - Puzzling Popularity of Sodoku - http://news.bbc.co.uk/2/hi/uk_news/magazine/4469719.stm

4. The Guardian - So you thought Sodoku came from the land of rising sun ... http://observer.guardian.co.uk/uk_news/story/0,6903,1484328,00.html

5. Sourceforge.Net - Open Source Sodoku Java Game http://playsudoku.sourceforge.net/

Links to Sodoku Sites

1. http://www.soduko.org/

2. http://www.daily-sudoku.com/soduko.php

3. http://www.soduko-soduko.org/index.php

4. http://www.codestore.net/store.nsf/unid/BLOG-20050608

5. http://www.sudoku.com/

6. http://onigame.livejournal.com/20626.html

7. Windows Sodoku Games - http://www.sadmansoftware.com/sudoku/index.html

8. 2DPlay.Com - Sodoku Online Game - http://www.2dplay.com/sudoku-original/sudoku-original-play.htm