Reputed Logically Impossible Sudoku Grid!

Jay

Hi all

Whilst browsing i have discovered
w.w.w.f.l.i..c.k.r.c.o.m/photos/npcomplete/2304537670/in/photostream/
(apologies for the .. but i haven't made enough posts to post a url!

Which apparently is a Sudoku puzzle which is Impossible for a human to solve.!!
Please try this out yourself or using any logical solver you have / can find

Here it is in string format:

000700800000040030000009001600500000010030040005001007500200600030080090007000002

...7..8......4..3......9..16..5......1..3..4...5..1..75..2..6...3..8..9...7.....2

Please test this out and return your findings!

I did not create and do not have anything to do with the generation of this puzzle!

EDIT:

**********
Results from a VERY long running Analysis by the Sudoku Explainer Java Application:

Analysis results
Difficulty rating: 10.6
This Sudoku can be solved using the following logical methods:
53 x Hidden Single
2 x Direct Hidden Pair
3 x Naked Single
6 x Pointing
1 x Claiming
1 x Naked Pair
1 x X-Wing
2 x Hidden Pair
1 x Naked Triplet
1 x Unique Rectangle type 1
1 x Forcing X-Chain
4 x Forcing Chain
1 x Nishio Forcing Chains
7 x Region Forcing Chains
5 x Cell Forcing Chains
4 x Dynamic Cell Forcing Chains
6 x Dynamic Region Forcing Chains
15 x Dynamic Contradiction Forcing Chains
7 x Dynamic Contradiction Forcing Chains (+)
6 x Dynamic Contradiction Forcing Chains (+ Forcing Chains)

*******
Which proves that this puzzle is solvable by logical means!

This appears to be a great test for any logical solver!

I simply found it intriguing!!

Pat · Posted: Thu Apr 28, 2011 7:08 am Post subject:

Jay · Posted: Thu Apr 28, 2011 5:09 pm Post subject: Ah

Ah sorry for the re-post in that case!