## Asymmetric Sudoku

Advanced methods and approaches for solving Sudoku puzzles

### Asymmetric Sudoku

Hello to all members of this Forum.I have joined this forum today and has also started solving Sudoku puzzels recently.i downloaded a software for solving Sudoku and when inserted a puzzle given in a newspaper(9*9 sudoku) it said that the puzzle is assymmetric.i searched on google for finding what is a asymmetric puzzle but could not find.can anybody explain me what is assymmetric Sudoku.I wiil be very thankful to him.
yugal

Posts: 1
Joined: 03 March 2009

Hi Yugal,

Welcome to the Sudoku Player's Forum.

If the solver you downloaded was Simple Sudoku, then it's complaining that the givens are placed such that they do not conform to the rotational symmetry expected of most published sudoku puzzles. If you turn the puzzle 180 degrees, it should "look" the same in terms of where the givens are positioned.

If you copy/paste a puzzle directly into Simple Sudoku, it doesn't complain, so I'm assuming you are entering the puzzle manually.

Copy and paste this puzzle (Royle17 #1):
Code: Select all
`000000010400000000020000000000050407008000300001090000300400200050100000000806000`

If you enter it manually, you'll get the message that this puzzle is not symmetrical do you want to proceed? You can safely answer yes. SS won't let you enter an invalid puzzle and it will query you if there are multiple solutions while entering manually. I don't know about pasting an invalid PM or puzzle.

If you are using some other solver, it probably is executing a similar test after manually entering the givens.

Cheers,
Paul
PIsaacson

Posts: 249
Joined: 02 July 2008

Symmetry in most instances (especially with computer solvers) refers to symmetry of the clues around an a specific axis (line or point)

tarek

[Edit: I don't use a spelling checker. Even if I did, the spelling of access was correct . Also some special thanks to the BOLD fairy]
Last edited by tarek on Wed Mar 04, 2009 11:26 am, edited 1 time in total.

tarek

Posts: 2908
Joined: 05 January 2006

### Re: Asymmetric Sudoku

yugal wrote:Hello to all members of this Forum.I have joined this forum today and has also started solving Sudoku puzzels recently.i downloaded a software for solving Sudoku and when inserted a puzzle given in a newspaper(9*9 sudoku) it said that the puzzle is assymmetric.i searched on google for finding what is a asymmetric puzzle but could not find.can anybody explain me what is assymmetric Sudoku.I wiil be very thankful to him.

For sudoku terms, the place to look is sudopedia.
Regards,

Mike Metcalf

m_b_metcalf
2017 Supporter

Posts: 9797
Joined: 15 May 2006
Location: Berlin