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 18th 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

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: 5 sessions and 1 FLASH session are organized from March 21st to June 8th 2011.
NEW 2011! A new grid is available every Monday (Sûdoku or Hitori) !

• Session 1: from March 21st to April 2nd
• Session 2: from April 4th to April16th
• Session 3: from April18th to April 30th
• Session 4: from May 2nd to May 14th
• Session 5: from May 16th to May 28th
• FLASH Session: June 8th at 7:00pm (Paris hour) - NEW! This session has only one winner: the first one to send her/his CORRECT grid by e-mail at the following adresse (subject: Sûdoku contest):

Participation by e-mail is available only for the FLASH session!

Contest deadline: the mails sent after May 28th, 2011, considering the postmark, or the e-mails sent after June 8th, 2011, 11:59pm (Paris hour) won’t enter the contest.

Prizes and prizegiving
At the end of each session, 2 winners are going to be selected. They will get a free entrance ticket for Japan Expo 12th Impact each, valid for the day they choose (except Saturday), sent by mail after the end of the contest.

To be rewarded: the first one to send her/his grid, as well as another drawn among all the right grids sent during the session (except FLASH session, see above).
 

First Session

Here is the first grid

And its solution.
The winners are:

• Aïda RAINERI and
• Fanny CAFFIN

Congratulations!

 

Second Session

There is the new grid, the second one.

Find out the solution here!
The winners are:

• Delphine DRUMONT and
• Bernard BEGHADID

Congratulations!

 

Third Session

New session, new grid!

Right now, its solution! The winners are:

• Alexine COLSON and
• Vanessa PANZANI

Congratulations!

 

Fourth Session

Here is the fourth grid!

Click here to see the solution.
The winers are:

• Sophie PLOVIE and
• Martine DESHAYES

Congratulations and thanks everyone!

 

Fifth Session

Last regular grid, the fifth one!

Here is the solution. The winners are:

• Abraham OH and
• Joffrey SELINGE

Congratulations!

 

FLASH Session  !

Here is the last grid! 

It's a flash session! Only the first correct grid, sent by e-mail, is winning!

The solution was first found by... Aurélie VALOGNES! Congratulations!

 

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 FLASH session, see 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.