As well as producing our own proofs, we also accept (and encourage!) submissions from players. If you have a proof that you would like to share, then send us an email so we can work something out.
Tough Sudoku, 14/Sept/2005.
Tough Sudoku, 18/Sept/2005 (Bruno).
Tough Sudoku, 18/Sept/2005 (Andrei).
For more sudoku proofs check out
Bruno's Sudoku Proofs
Check out the
Almost Finned SwordFish example
Every digit from 1 to 9 must appear:
In each of the columns,
in each of the rows,
and in each of the nine boxes.
Some Handy links are:
entry on Sudoku.
Members Get Goodies!
Become a member and get heaps of stuff, including: stand-alone sudoku game, online solving tools, save your times, smilies and more!
Welcome our latest Members
from New York city
Member's Birthdays Today
from France, T,
Friends currently online
Want to see when your friends are online?
Become a member
Find the Hidden Bars of Melbourne
Free Crossword Puzzles
Play online or print them out. 2 new crosswords daily.
Play online jigsaw puzzles for free, with new pictures everyday
Play online with your own photos
Play sudoku with pictures from Flickr
Play Kakuro online!
Free Wordoku puzzles everyday.
Test your General Knowledge.
Pumpkin Carving Pattern
Free halloween pumpkin carving patterns.