Chen Cen Cup IV

Dimanche 19 décembre de 8h00-10h00 !

Voici les instructions à suivre pour participer:

The competition will be held 07:00:00 to 09:00:00 GMT 19 Dec 2010.
Log in on the website http://www.sudokufans.org.cn/en/
Go to http://www.sudokufans.org.cn/pk3/index.en.php for the competition.
The questions can be downloaded 3 hours prior to the competition. The corresponding password will show up on the webpage 5 minutes before the competition starts.
Multiple submissions is allowed during the given time period. Only the last submission will be taken into account.
For every question, type the first set of digits into the first blank, and the second set of digits into the second blank.

Fred

Rules：
1-3：Classic Sudoku
4：Hidden Skyscrapers(6*6)：Apply classic sudoku rules, number correspond with heights of skyscrapers. If there is an arrow in a cell, the corresponding number in the cell shows how many skyscrapers are seen from this cell in the direction given by the arrow. If, on the other hand, there is no arrow pointing to a certain direction, the digit in the cell does not fulfill the above condition.



5 Characteristics Sudoku: (8*8) Chinese characters outside specify the characteristics of the digit in the nearest cells. 大:5678、小:1234，质:2357、合:468，奇:1357、偶:2468.
6:DoubleDoku
7:Non consecutives
8:Renban group
9: Kropki
10.disjoint groups
11:Calcdoku: Krtek’s cup 29
12：Plus minus Sudoku: Fill -4, -3, -2, -1, 0, 1, 2, 3, 4 into the cells so that there are no identical numbers in each row, each column or each box. You can add minus sign (-) in front of given numbers if needed.



For the last question, type in the numbers sequentially without space, e.g. 12340-1-2-3-4.

Je ne sais pas si vous voyez les images:

http://blog.sina.com.cn/s/blog_602619f00100n3g0.html
http://blog.sina.com.cn/s/blog_602619f00100mu9n.html

Fred