The New Sudoku Players' Forum

[Guest]

Have been doing the puzzle in Friday's paper but am stuck at:

89**467*1
47*1*986*
6123**459
32*7*5**4
*4*****7*
*674*2***
759**1348
2368*4*17
184*****6

Have tried x-wings and every other type I have found on the site...

[Pappocom]

Just a note for Sydney Guest to explain why I have moved this post to the Non-Pappocom forum. The Sydney Morning Herald does not get its Sudoku puzzles from Pappocom. Further, you are asking for help about a particular puzzle - whereas the Solving Techniques forum is meant for widely-applicable techniques and theories, relating to puzzles in general.

There is a real point to this - it's not just a silly matter of keeping things in the right pigeon-holes. Non-Pappocom puzzles sometimes have different ideas about things, and they can be out-of-step with the rest of the Sudoku-puzzling world. When you give advice, or receive suggestions from others, it's important to know whether you are talking about Pappocom (Japanese-style) puzzles, or others.

- Wayne

[Guest]

Okay sure I see your point, but now my message is in a lost corner of your forum and will probably never get answered!

[whohe]

Okay sure I see your point, but now my message is in a lost corner of your forum and will probably never get answered!

Hi Sydney Guest -

Don't worry, Pappocom has kindly left a link in the original forum so people will still see it.

From what I can see, this puzzle is very similar to the one discussed here -

http://forum.enjoysudoku.com/viewtopic.php?t=373

The solution is a 5 in R1C3 - everything follows "logically" from there.

[Animator]

It is impossible to solve this puzzle using only logic... Trial and error is required.

[Guest]

Okay thanks to the Animator - so that is really what sets a Pappocom puzzle out from others is that logic alone should suffice?

[Animator]

A really short answer: yes.

[Pat]

Code: Select all

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



It is impossible to solve this puzzle using only logic... Trial and error is required.

if r9c4 = 9
then r1c4 = 5, r1c8 = 2, and r9c8 has no possibility remaining