dailysudoku.com

The Fugitive · Joined: 28 Aug 2005 Posts: 10

Apologies if these have already been picked up, but the following classic puzzles are exact duplicates:

15/06/05 and 01/08/05 (already noted in a previous post)
01/10/05 and 03/01/06
02/10/05 and 02/01/06
03/10/05 and 05/01/06
08/10/05 and 06/01/06
11/10/05 and 20/01/06
14/10/05 and 19/01/06
17/10/05 and 22/01/06
20/10/05 and 26/01/06
22/10/05 and 28/01/06
29/11/05 and 18/02/06

List up to date as of today, 22nd March 2006.

Guest · Posted: Wed Mar 22, 2006 9:00 pm Post subject:

Does it matter? Do you actually remember how you solved it months before? Perhaps you've learnt something new in the meantime and it's different now.

Let's be grateful that these fantastic puzzles appear here every day.

The Fugitive · Joined: 28 Aug 2005 Posts: 10

I'm only pointing out duplicates, not passing judgement. It matters simply because its information and might suggest a problem in the author's puzzle generator.

Guest · Posted: Thu Mar 23, 2006 7:14 pm Post subject:

OK, Sorry I misunderstood your point.

George Woods · Joined: 28 Mar 2006 Posts: 304 Location: Dorset UK

There are over 60 billion variants of most soduku puzzles,

Not only can the numbers be reassigned, but any of top3 middle3 or bottom 3 rows can be juggled. same goes for columns, and finaly exactly the same goes for blocks of 3 for columns and rows and that makes 6 to power 8 multiplied by 8! different versions of the same puzzle

Even if my maths aren't quite right, (for instance a puzzle might have no 9's showing or have a starting symmetry), there are clearly very many variants of the same puzzle- But the differences are superficial, since the same techniques are needed to solve all those variants (I think)!

Just a thought!

keith · Posted: Sat Apr 01, 2006 9:41 pm Post subject: Number of puzzles

George,

Take a look at Wikipedia. http://en.wikipedia.org/wiki/Sudoku