A sudoku puzzle please try it

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A sudoku puzzle please try it

Postby albert1950 » Wed Jul 09, 2008 5:38 am

As below it is a sudoku puzzle I created with my program please try it
1 4 3 x x x x x x
x x x 2 7 5 x x x
x x x x x x x x x
x 2 x x 9 x 6 x x
x x 9 6 x 8 7 x x
x x 5 x 4 x x 1 x
x x x x x x x x x
x x x 5 2 6 x x x
x x x x x x 9 3 8
clues: 22
level: hard
day of creation: ( y /m /d) 08/03/06 By Albert.Teng
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Postby wintder » Wed Jul 09, 2008 9:29 am

It is a valid puzzle and has symmetry. These are good things.

It is quite easy and because of the structure very boring, because of so many naked triples at the start. If all your puzzles have this structure you have lots of work to do!:)
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Postby ab » Wed Jul 09, 2008 3:50 pm

ooh I think you're a bit harsh wintder. The puzzle requires more than singles, which is also good, but admittedly by the standards of some on this forum it's not hard at all.

I say nice puzzle Albert, keep up the good work:)
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Postby JPF » Wed Jul 09, 2008 5:38 pm

Yes, good work : the puzzle hides a 19 clues puzzle :
Code: Select all
 *-----------*
 |143|...|...|
 |...|275|...|
 |...|...|...|
 |---+---+---|
 |...|...|6..|
 |..9|6.8|7..|
 |...|.4.|.1.|
 |---+---+---|
 |...|...|...|
 |...|526|...|
 |...|...|938|
 *-----------*
JPF
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if restriction symmetry excluded the clues will less then 22

Postby albert1950 » Thu Jul 10, 2008 12:58 am

JPF wrote:Yes, good work : the puzzle hides a 19 clues puzzle :
Code: Select all
 *-----------*
 |143|...|...|
 |...|275|...|
 |...|...|...|
 |---+---+---|
 |...|...|6..|
 |..9|6.8|7..|
 |...|.4.|.1.|
 |---+---+---|
 |...|...|...|
 |...|526|...|
 |...|...|938|
 *-----------*
JPF

Hi JPF
Yes ,you are right ,I have checked the puzzle using my program with the following conclusion if we exclude the restriction "symmetry" then the clues of the puzzle will be less than 22 and make this puzzle a bit harder
Albert from Taiwan
Thanks
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Tips for a novice

Postby wilbur13 » Tue Aug 05, 2008 9:44 pm

Can anyone offer some direction, or a source of tips, for someone just starting out solving Sudoku? I get the "easy" level but am often thwarted by more difficult puzzles.
Thank you.
Wilbur
Toronto, Canada
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The answer of the puzzle

Postby albert1950 » Sat Aug 09, 2008 9:45 am

1 4 3 x x x x x x
x x x 2 7 5 x x x
x x x x x x x x x
x 2 x x 9 x 6 x x
x x 9 6 x 8 7 x x
x x 5 x 4 x x 1 x
x x x x x x x x x
x x x 5 2 6 x x x
x x x x x x 9 3 8
ANS:
143869257
896275143
257134896
724391685
319658724
685742319
471983562
938526471
562417938
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