The New Sudoku Players' Forum

[Guest]

Anyone got any really hard puzzles... I need something that's really challenging.

[dcj1978]

Got this one from the program...

Code: Select all

_____________
|9.2|...|8.7|
|.54|...|23.|
|...|7.9|...|
-------------
|3.5|8.2|7.1|
|...|...|...|
|6.1|5.7|4.2|
-------------
|...|3.8|...|
|.78|...|15.|
|2.9|...|6.8|
-------------

Enjoy

[scrose]

Try some puzzles that require the swordfish technique. Or try the samurai sudoku. Or try the dion cube.

[Drusenija]

Got this one from the program...

Code: Select all

_____________
|9.2|...|8.7|
|.54|...|23.|
|...|7.9|...|
-------------
|3.5|8.2|7.1|
|...|...|...|
|6.1|5.7|4.2|
-------------
|...|3.8|...|
|.78|...|15.|
|2.9|...|6.8|
-------------

Enjoy

I don't know how you created that puzzle, but it's certainly not a challenging one ^_~ At every step there is a number that cannot go anywhere else. If you're keeping track properly, there aren't any decisions to be made at all, it all just falls into place ^_^

[lunababy_moonchild]

Generate you're own puzzles then.

Luna

[Drusenija]

It was just an observation *laughs* The original poster asked for a challenging puzzle, and that one didn't seem to fit that description.

[JOTHI]

Anyone got any really hard puzzles... I need something that's really challenging.

get one of order 100 by 100 from me

my id is mailtojothi@gmail.com

[oysterkite]

Try this puzzle. Its know as "Qassim Hamza" and some people regard it as among the most difficult puzzles ever created.

Code: Select all

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

Let me know if you are able to solve it.

[20110428 ronk-moderator edit: change dashes to periods in puzzle grid]

[Pat]

Try this puzzle. It's know as Qassim Hamza
and some people regard it as among the most difficult puzzles ever created.

[ 22 clues ]

Code: Select all

 . . . | 7 . . | 8 . .
 . . . | . 4 . | . 3 .
 . . . | . . 9 | . . 1
-------+-------+------
 6 . . | 5 . . | . . .
 . 1 . | . 3 . | . 4 .
 . . 5 | . . 1 | . . 7
-------+-------+------
 5 . . | 2 . . | 6 . .
 . 3 . | . 8 . | . 9 .
 . . 7 | . . . | . . 2



Let me know if you are able to solve it.

this may be tough enough for the Topic on "How regular is to generate sudoku with difficulty 9+ SE?"

~ Pat

[StrmCkr]

here u go one of the hardest puzzles found so far

Code: Select all

 Easter Monster
 *-----------*
 |1..|...|..2|
 |.9.|4..|.5.|
 |..6|...|7..|
 |---+---+---|
 |.5.|9.3|...|
 |...|.7.|...|
 |...|85.|.4.|
 |---+---+---|
 |7..|...|6..|
 |.3.|..9|.8.|
 |..2|...|..1|
 *-----------*

heres a link to other really hard puzzles.

http://www.research.att.com/~gsf/sudoku/data/hardest-2007-04-16.dat

[ronk]

Try this puzzle. Its know as "Qassim Hamza" and some people regard it as among the most difficult puzzles ever created.

Would you please provide a source for that puzzle ... or at least the name of its creator

TIA, Ron

[Ocean]

Try this puzzle. Its know as "Qassim Hamza" and some people regard it as among the most difficult puzzles ever created.

Would you please provide a source for that puzzle ... or at least the name of its creator

TIA, Ron

Check for equivalence with this one, the so-called gold list #5:

Code: Select all

001002000030040050600700800006000007010000030900000600007001008040030020000500900

(Posted 3 nov 2006, and stayed on top of ravel's hardest list for about one month.)
Curious about what path the puzzle has taken to appear in its new form, and how it got its new name. I am pleased that somebody has enjoyed playing with it.

[wapati]

Check for equivalence with this one, the so-called gold list #5:

Curious about what path the puzzle has taken to appear in its new form, and how it got its new name. I am pleased that somebody has enjoyed playing with it.

Ocean, to many of us that was a lawyer's answer.

Accurate, but of no use.

Can you attribute this puzzle (I think it is a morph of someone's, from what you said ) to anyone?

Further, do you know the first poster who named it "Qassim Hamza" ?

Thanks.

[daj95376]

wapati, I think Ocean was politely trying to say that it was one of his puzzles that was morphed into the puzzle in discussion. I suspect ronk already knew this and was trying to track down who did it. However, I'm just a simple country boy and probably completely wrong.

[wapati]

wapati, I think Ocean was politely trying to say that it was one of his puzzles that was morphed into the puzzle in discussion. I suspect ronk already knew this and was trying to track down who did it. However, I'm just a simple country boy and probably completely wrong.

You have it as I saw it.

Was any question answered?