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Posts: 2
Location: Germany | Hello!
I have some problems with the "Symmetric unequal sudoku" and "Antiknight sudoku".
Could you please give me an example how to match it?
Thanks
The sudokus are very interested. Good job 
Greetings from Germany
Karlson
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Location: India | Hello Karlson,
Welcome to LMI.
Can you please the problem you are facing with "Symmetric unequal sudoku"?
When rotated 180° R3C3 becomes R7C7, R1C6 becomes R8C4. So as per the rules, R3C3 can never have the same digit as R7C7, similarly R1C6 can never have the same digit as R8C4, so on ...
In general, RnCn can never have the same digit as R[10-n]C[10-n]
Hope the instruction is clear.
If you are facing problems solving the specific example, let us know and one of us can help with step-by-step hints?
If you need more examples, you can check the puzzle booklet of mock12 at http://logicmastersindia.com/mock12/mock12.asp
Also, what is the problem you are facing about "Antiknight sudoku"?
Deb
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Odd Even & Twisted Classics (SM 16/17) Author
Posts: 460
Location: India | Hi Karlson,
I am trying to attach an example in image format to explain it better.
In First image, R1C1 (Row 1 - Column 1 ) is having number 8. The second image is the same grid which I have rotated by 180 degree angle and now the number 8 is in R9C9.
The condition in Symmetric Unequal sudoku is that same number cannot be in a cell which is rotated by 180 degrees. Hence, if 8 is in R1C1 it cannot be in R9C9. Hope this clarifies.
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Odd Even & Twisted Classics (SM 16/17) Author
Posts: 460
Location: India | In Antiknight, a number cannot repeat in another cell which is at a knights step as in Chess. In the image below, R5C5 has the number 5 in it. Other cells which are at a Knight's step (as in chess ) from this cell are highlighted in yellow color. Hence the number 5 cannot be placed in any of these cells which are colored yellow. Hope this is what you were looking for in Anti Knight Sudoku.
Rishi (purifire)
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Odd Even & Twisted Classics (SM 16/17) Author
Posts: 460
Location: India | I hope I have made a correct assumption of your problem with Anti Knight Sudoku Karlson :)
Rishi |
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WSPC Organizer
Posts: 739
Location: India | If you want more practise Anti Knight puzzles to solve, there are about 10 of them on my blog: http://rohanrao.blogspot.com/search/label/Anti%20Knight%20Sudoku
Rohan. |
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Posts: 2
Location: Germany | @all
Thank you very much for the Illustration and help. 
The language (my translation) was the problem in "Anti Knight Sudoku".
In german the figur called "Pferd" (translation in english = horse).
Symmetric unequal sudoku is now no problem also too.
I´am looking forward for the weekend.
Many greetings
Karlson 
Edited by Karlson 2010-07-06 11:36 PM
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Posts: 172
Location: ITALY | Sorry if I go back to the Between Sudoku (or Sandwich sudoku..)
the instructions say that "if there is MORE THAN ONE CELL between two given digits.... only digits inbetween the given can be used.
But in the example (and in Jan's explanation a few posts ago) the same applies also when there is EXACTLY ONE CELL between two given digits. for example, between 7 and 9 in row 9 the is EXACTLY ONE CELL (and not MORE THAN ONE CELL), and the digit 8 is placed. Is this just a coincidence? Could another digit (for example 3) be used? Or the instructions are misleading?
In the diagram, MORE THAN ONE CELL BETWEEN TWO GIVEN DIGITS occur only in row 5 and in column 5, while there are many more examples of EXACTLY ONE CELL BETWEEN GIVEN DIGITS.
Should the instructions say "if there is AT LEAST ONE CELL BETWEN TWO GIVEN DIGITS IN THE SAME ROW OR COLUMN????)
Please clarify.
Stefano
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Location: India | Stefano,
You are correct.
The instruction should be "if there is AT LEAST ONE CELL BETWEN TWO GIVEN DIGITS IN THE SAME ROW OR COLUMN, ......"
Deb
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Location: India | Sudoku Booklet (12 pages, password protected) is uploaded here
Note that this booklet does not have the examples and the Rules.It only has points and the Sudokus. |
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WSPC Organizer
Posts: 739
Location: India | I think this should be mentioned somewhere on the webpage, so that people who expect it, can be informed in time.
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PR 2020 (Casual and Word) Author
Posts: 349
Location: India | Best of luck to everyone, I am getting to participate after some time, hope I do well. |
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Posts: 42
Location: United States | This was great fun, as LMI mocks always are. Special thanks to Janek, whose puzzles were exceptionally well-written and include some clever new variants.
Good luck to all! I promise you will enjoy these. |
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Posts: 199
Location: United States | I'll second Ziti's comment that this was an excellent test with many great puzzles in these styles. Many clever work-ins and a good challenge overall. Thanks janoslaw. |
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Location: India | The bonus points is not mentioned in the IB.
Bonus 5 minutes per minute saved will be given to those who'll have got all correct.
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Odd Even & Twisted Classics (SM 16/17) Author
Posts: 460
Location: India | I agree with Jason and Thomas... The puzzles were very well made ..... had a wonderful time having a go at them. |
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PR 2020 (Casual and Word) Author
Posts: 349
Location: India | Great set of puzzles.
Most of the variants had the variant rule applied in multiple ways.
My speed did not allow me to even have a look at the classics :(
But overall loved the test :) |
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Sudoku Day Author
Posts: 103
Location: Serbia | Very nice puzzles, I had a lot fun. If someone organize the world puzzlemaking championship, Jan certainly would be on the top, too. |
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Location: India | Congratulations to Thomas Snyder, Fred Stalder, Rohan Rao and Jakub Ondrousek for topping in LMI July Sudoku Test - Classic Look-Alikes
There were 158 participants, out of which 126 got non-zero scores.
Thanks you everyone for participating.
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Location: India | Looks like everyone liked the Sudokus by janoslaw.
The timing of the the test (2 hours) seemed just perfect, with exactly one player completing the test.
Overall a successful Monthly Test for LMI, with so many players turning up for Sudokus.
Thank you so much janoslaw. |
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Location: India | amitsowani - 2010-07-19 1:54 AM
Great set of puzzles.
Most of the variants had the variant rule applied in multiple ways.
My speed did not allow me to even have a look at the classics :(
But overall loved the test :)
Amit, you got to look at the Classics. They are very artistically crafted. |
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Location: India | Here are some blog entries that you would not like to miss
Nikola Zivanovic - http://translate.google.com/translate?js=y&prev=_t&hl=en&ie=UTF-8&l...
Rohan Rao - http://rohanrao.blogspot.com/2010/07/indian-sudoku-championship-jul...
Thomas Snyder - http://motris.livejournal.com/120480.html
Thanks to the respective authors.
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WSPC Organizer
Posts: 542
Location: India | I am not able to see the results when using Firefox browser. Using IE7, it looks fine. |
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Diagonal Vision Author
Posts: 337
Location: Switzerland | Wonderful test !
It was also my best result in an online tournament.
I liked every grid, they were very well constructed, thanks to Jan for this wonderful work !
The 9*9 grid "No 3 odd/even in line Sudoku" was difficult and very beautiful to solve. It took me long time to solve, but it is the grid that my direct competitors did not solve, that made the difference for the 2nd place, as the first place was to hard to reach against Thomas, who did a great performance !
Thanks to LMI for these very well organized tests !
Fred
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