From Japanese Sû which means figure and Doku which means unique, Sûdoku is played by filling in a grid with figures from 1 to 9, while following a number of rules.

 

Though its creation dates back to the 18^th century, this game only appeared in Japan in April 1984 in the magazine Monthly Nikolist under the name of Sûji wa dokushin ni kagiru.

 

Rules

 

The grid of this puzzle is made of 9 columns and 9 lines. It is divided into 9 areas, each one of those made of 9 cells.

The aim of this puzzle is simple: a figure cannot appear more than once in each line, column or area. 
 

Click to see an example of Sûdoku

See the solution of this example

 

Information

 

How to participate ?
You have to download the Sûdoku grid put on line on this page at each session. You have to print or copy the grid and fill it in, then send it to us by mail.

If you want to participate from abroad, you are allowed to send your contribution by e-mail at the following address: concours@japan-expo.com. Be careful, contributions by e-mail will be taken into account only for drawing lots.

Participation by mail
Send your grid to the following address:

JAPAN EXPO
Concours de Sûdoku
14 place Georges Pompidou
93160 Noisy-le-Grand - FRANCE

Frequency
2 sessions are organized from April 10^th to May 7^th 2012.

• Session 1: from April 10^th to April 23^th
• Session 2: from April 24^th to May 7^th
  
  

Contest deadline
The mails sent after May 7^th, 2012, considering the postmark won’t enter the contest.

Prizes and prizegiving
At the end of each session, 3 winners are going to be selected. They will get a free entrance ticket for Japan Expo 13^th Impact each, valid for the day they choose (except Saturday), sent by mail after the end of the contest.

The winners
The first one to send her/his grid, as well as two other drawn among all the right grids sent during the session.

 

First Session

 

Here is the first grid!

And here is the answer

And the winners are:

• Laurent DAVID, de Parmain
• Iseult BOUVIER, de Clermont
• Miao CHARRON, de La Louvière (Belgique)

 

Second Session

 

Here is the second grid!

And here is the answer

The winners are:

• Hélène HADDAD, from Les Ulis
• Maxime GERARD, from Neufgrange
• Thanya SAMARAKONE, from Paris

 

Frequently Asked Questions

 

Q.: Can I participate to several sessions?
A.: Yes, you can participate to each session. Yet you can participate only once to each session.

Q.: Will you give the solutions?
A.: Yes, the solutions will be given at the end of each session and the winners will be announced at the same time.

Q.: When will you give the results?
A.: They should be given about a week after the end of each session.

Q.: Is it possible to send the grid by e-mail?
A.: No you can only participate in this contest by mail. Except if you reside abroad (see conditions above).

Q.: Can we copy the grid?
A.: Yes, if you don’t have a printer but wish to participate to the contest, you can copy the grid on paper. And don’t forget to give your name and address.