Note that Sudoku problems are commutative.
That is, you can shift a column from its column number to any other column number, without changing the solution; and the same with rows.
Posted by
Jay Wind
on August 18, 2005 at 01:59 PM PDT
#
Hi Jay - I think you can switch columns (or rows) that intersect the same box. That is, you can switch columns 1 and 2, 1 and 3, or 2 and 3, but you can't necessarily switch columns 3 and 4 since you might end up with duplicate numbers within box 1, 2, 4, 5, 7, or 9.
I would hesitate to use the name "commutative" since it has a specific meaning in group theory.
You can also switch all instances of any two numbers in a board and the resulting board will be valid.
Posted by
Dan Rice
on August 18, 2005 at 03:31 PM PDT
#
wow
Posted by
70.48.6.82
on September 08, 2005 at 02:20 PM PDT
#
Wat is URL ?
Posted by
Jeannine Demeulder
on October 13, 2005 at 02:39 PM PDT
#
The URL is:
http://sudokublog.typepad.com/sudokublog/2005/08/the_password_is.html
Posted by
Dan Rice
on October 13, 2005 at 09:25 PM PDT
#
![[RSS Newsfeed]](/themes/sotto/images/valid-rss.png)
![[This is a Roller site]](/themes/sotto/images/roller-logo.gif){kind=logo}
Posted by Jay Wind on August 18, 2005 at 01:59 PM PDT #
I would hesitate to use the name "commutative" since it has a specific meaning in group theory.
You can also switch all instances of any two numbers in a board and the resulting board will be valid.
Posted by Dan Rice on August 18, 2005 at 03:31 PM PDT #
Posted by 70.48.6.82 on September 08, 2005 at 02:20 PM PDT #
Posted by Jeannine Demeulder on October 13, 2005 at 02:39 PM PDT #
Posted by Dan Rice on October 13, 2005 at 09:25 PM PDT #