Thread - Diagonal Vision — LMI March Sudoku Test

@ 2012-03-02 9:44 PM (#6836 - in reply to #6834) (#6836) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2012-03-02 9:44 PM

prasanna16391 - 2012-03-02 12:18 PM

I wonder if Fred has tried the revenge methods we talked about on facebook...

Haha ! Grids were hard enough ! I didn't to try to make them harder

Last time we authored a test at LMI ( http://logicmastersindia.com/lmitests/?test=M201103S ) nobody achieve to finish all the grids correctly in time, so this time I hope it'll not be the case

Untouch sudokus that I posted on my blog last week were initially planned as 13th grid for this test: http://sudokuvariante.blogspot.com/search/label/Untouch (untouch N°1 for the IB and untouch N°2 for the test).

Fred

@ 2012-03-03 2:46 AM (#6837 - in reply to #6832) (#6837) Top

debmohanty

Country : India

debmohanty posted @ 2012-03-03 2:46 AM

Rohan Rao - 2012-03-02 9:33 AM
I find it convenient when the diagonal lines of Anti Diagonal are given. It doesn't matter much but maybe if others prefer it too, it could be added.

Google search for Anti Diagonal Sudoku showed this link at the top - http://rohanrao.blogspot.in/2010/03/rules-of-anti-diagonal-sudoku.h...

@ 2012-03-03 2:48 AM (#6838 - in reply to #6832) (#6838) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2012-03-03 2:48 AM

Rohan Rao - 2012-03-02 9:33 AM

I find it convenient when the diagonal lines of Anti Diagonal are given. It doesn't matter much but maybe if others prefer it too, it could be added.

Looking forward to a 'sudoku' test (after more than a month).

All players can answer the poll in the beginning of this thread.

From my point of view it does not matter, but as I don't play, I'll not answer the poll.
Rohan, I noticed that anti-diagonal that are on your blog have no diagonal lines given

. But I can add them if a majority of players want, there is no problem for me.

Fred

@ 2012-03-03 5:41 AM (#6839 - in reply to #6837) (#6839) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2012-03-03 5:41 AM

debmohanty - 2012-03-03 2:46 AM

Rohan Rao - 2012-03-02 9:33 AM
I find it convenient when the diagonal lines of Anti Diagonal are given. It doesn't matter much but maybe if others prefer it too, it could be added.

Google search for Anti Diagonal Sudoku showed this link at the top - http://rohanrao.blogspot.in/2010/03/rules-of-anti-diagonal-sudoku.h...

Yes, but we must admit that this guy, Mister Rohanrao Blogspot, doesn't look very serious ! Does anybody know him ?

@ 2012-03-03 7:35 AM (#6840 - in reply to #6774) (#6840) Top

zachpuzzle

Posts: 14

Country : United States

zachpuzzle posted @ 2012-03-03 7:35 AM

This will be the first sudoku test that i participate instead of doing afterward so i am so excited

@ 2012-03-03 10:07 AM (#6841 - in reply to #6840) (#6841) Top

vopani

Posts: 739

Country : India

vopani posted @ 2012-03-03 10:07 AM

Ok people. I lose.

There's been some major problem with my blog (which is supposed to be resolved by 1st week of March), so I'm hoping to start posting again from Monday :-)

@ 2012-03-03 11:30 AM (#6842 - in reply to #6839) (#6842) Top

prasanna16391

Posts: 1801

Country : India

prasanna16391 posted @ 2012-03-03 11:30 AM

Fred76 - 2012-03-03 5:41 AM

Yes, but we must admit that this guy, Mister Rohanrao Blogspot, doesn't look very serious ! Does anybody know him ?

I'm not sure.. I think he's some foreigner...

Rohan Rao - 2012-03-03 10:07 AM

Ok people. I lose.

There's been some major problem with my blog (which is supposed to be resolved by 1st week of March), so I'm hoping to start posting again from Monday :-)

Looking forward to it Mister Rohanrao Blogspot.

@ 2012-03-03 2:52 PM (#6843 - in reply to #6840) (#6843) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2012-03-03 2:52 PM

zachpuzzle - 2012-03-03 7:35 AM

This will be the first sudoku test that i participate instead of doing afterward so i am so excited

Great !

@ 2012-03-05 12:08 AM (#6844 - in reply to #6774) (#6844) Top

prasanna16391

Posts: 1801

Country : India

prasanna16391 posted @ 2012-03-05 12:08 AM

Should've kept "no" and "does not matter" as two separate options in the poll, now the people who wanted it might get out voted by people to whom it didn't matter. Of course this is in hindsight, it just struck me.

@ 2012-03-06 9:11 AM (#6848 - in reply to #6774) (#6848) Top

Administrator

Country : India

Administrator posted @ 2012-03-06 9:11 AM

Examples Online

All examples are available online now. Please check the submission page, and report any inconvenience.

@ 2012-03-07 1:59 PM (#6853 - in reply to #6774) (#6853) Top

David McNeill

Posts: 63

Country : United Kingdom

David McNeill posted @ 2012-03-07 1:59 PM

Hope to participate in this test. Is it possible to mark the arrows in a paler colour in Arrows Battle Sudoku?

Thank you,

David McNeill.

@ 2012-03-07 2:55 PM (#6854 - in reply to #6853) (#6854) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2012-03-07 2:55 PM

David McNeill - 2012-03-07 1:59 PM

Hope to participate in this test. Is it possible to mark the arrows in a paler colour in Arrows Battle Sudoku?

Thank you,

David McNeill.

Done for the test grid !

Fred

@ 2012-03-09 3:05 AM (#6856 - in reply to #6854) (#6856) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2012-03-09 3:05 AM

As there is a big majority in the poll who said that it were not better to have marked diagonal in the anti-diagonal sudoku (or it does not matter) , I'll not add them.
Sorry for the 7 people who voted for marked diagonals in the anti-diagonal sudoku, I hope you'll have fun solving this grid despite that.

Fred

@ 2012-03-09 4:03 AM (#6857 - in reply to #6856) (#6857) Top

Para

Posts: 315

Country : The Netherlands

Para posted @ 2012-03-09 4:03 AM

Fred76 - 2012-03-09 3:05 AM

As there is a big majority in the poll who said that it were not better to have marked diagonal in the anti-diagonal sudoku (or it does not matter) , I'll not add them.
Sorry for the 7 people who voted for marked diagonals in the anti-diagonal sudoku, I hope you'll have fun solving this grid despite that.

Fred

I just find it handier to know any marked diagonal means different digits.

@ 2012-03-09 10:44 AM (#6860 - in reply to #6857) (#6860) Top

Administrator

Country : India

Administrator posted @ 2012-03-09 10:44 AM

Sudoku instructions in Chinese in sudokufans.org.cn forum

@ 2012-03-09 1:25 PM (#6861 - in reply to #6774) (#6861) Top

swaroop2011

Posts: 668

Country : India

swaroop2011 posted @ 2012-03-09 1:25 PM

Please help me out to solve this "QUEEN SUDOKU" further...
I am thereby attaching a photo of how much i was able to solve(logically).
I dont want to solve it by guess as this is the practice puzzle..

(queen_sudoku.png)

Attachments
----------------

queen_sudoku.png (18KB - 3 downloads)

@ 2012-03-09 2:34 PM (#6862 - in reply to #6861) (#6862) Top

prasanna16391

Posts: 1801

Country : India

prasanna16391 posted @ 2012-03-09 2:34 PM

swaroop2011 - 2012-03-09 1:25 PM

Please help me out to solve this "QUEEN SUDOKU" further...
I am thereby attaching a photo of how much i was able to solve(logically).
I dont want to solve it by guess as this is the practice puzzle..

I got through this one by a complex work through of where the 9s can and can't be, first of all I'd suggest you put the 8 in R1C1, as the 5-7 pair take up the below row and the 9 in the middle omits a 9 in either of the main diagonals. After that, either just look at the 9s and think hard about the possibilities with the queen rule, or find another way and tell me as well

@ 2012-03-09 5:21 PM (#6863 - in reply to #6862) (#6863) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2012-03-09 5:21 PM

prasanna16391 - 2012-03-09 2:34 PM

This grid is perhaps a bit hard for the instructions booklet. Prasanna is right, you must study the 9's and try to find a contradiction. I think it's the only possibility to crack this grid.
For example, if you try to put a 9 in R6C1, then you have a 9 in R9C3 (only option is that box), then it has to be in R8C9 (only option in this row), then in R4C7 and then you cannot place a 9 in column 8.

So you know that R6C1 is not a 9, and then it becomes easier to finish the grid.

(queen_swaroop.png)

Attachments
----------------

queen_swaroop.png (19KB - 4 downloads)

@ 2012-03-09 6:16 PM (#6864 - in reply to #6863) (#6864) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2012-03-09 6:16 PM

I've just published a grid which will help you to immerse in a diagonal world smoothly, with just a classic sudoku

:

http://sudokuvariante.blogspot.com/2012/03/sudoku-classique-n1.html

Fred

@ 2012-03-09 11:06 PM (#6865 - in reply to #6774) (#6865) Top

swaroop2011

Posts: 668

Country : India

swaroop2011 posted @ 2012-03-09 11:06 PM

Hey

to Prassana and Fred,
for helping it out..
Will try now and see.
It is the tough one in comparison to all other grids.
:)

@ 2012-03-09 11:52 PM (#6866 - in reply to #6774) (#6866) Top

Administrator

Country : India

Administrator posted @ 2012-03-09 11:52 PM

Announcements

1. Password protected pdf is uploaded. It has 12 pages. There is no cover page.
2. If you are solving online, no need to submit again using paper mode.
3. Paper only link - http://logicmastersindia.com/M201203S/?paper=1

@ 2012-03-10 6:00 PM (#6867 - in reply to #6774) (#6867) Top

neerajmehrotra

Posts: 329

Country : India

neerajmehrotra posted @ 2012-03-10 6:00 PM

grt grids....thanks Fred and Team LMI!!!

@ 2012-03-11 9:27 PM (#6874 - in reply to #6774) (#6874) Top

rajeshk

Posts: 542

Country : India

rajeshk posted @ 2012-03-11 9:27 PM

Thanks Fred for creating this great test and thanks to LMI team for hosting it flawlessly.

@ 2012-03-11 10:10 PM (#6875 - in reply to #6774) (#6875) Top

prasanna16391

Posts: 1801

Country : India

prasanna16391 posted @ 2012-03-11 10:10 PM

This is easily the longest I've stayed in the top 10 of an LMI test. That might be more to do with them being extended to Monday though

@ 2012-03-12 1:09 AM (#6876 - in reply to #6875) (#6876) Top

Fred76

Posts: 337

Country : Switzerland

Fred76 posted @ 2012-03-12 1:09 AM

prasanna16391 - 2012-03-11 10:10 PM

This is easily the longest I've stayed in the top 10 of an LMI test. That might be more to do with them being extended to Monday though

No doubt: you become a sudoku specialist !

Should the diagonals be marked in the "Anti-Diagonal Sudoku"?
Will it be better if the diagonals be marked in the "Anti-Diagonal Sudoku"?
Option	Results
Yes, it will be much better	8 Votes - [22.86%]
No / does not matter	27 Votes - [77.14%]

View Results


	@ 2012-03-02 9:44 PM (#6836 - in reply to #6834) (#6836) Top
Fred76 Posts: 337 Country : Switzerland	Fred76 posted @ 2012-03-02 9:44 PM prasanna16391 - 2012-03-02 12:18 PM I wonder if Fred has tried the revenge methods we talked about on facebook... Haha ! Grids were hard enough ! I didn't to try to make them harder Last time we authored a test at LMI ( http://logicmastersindia.com/lmitests/?test=M201103S ) nobody achieve to finish all the grids correctly in time, so this time I hope it'll not be the case Untouch sudokus that I posted on my blog last week were initially planned as 13th grid for this test: http://sudokuvariante.blogspot.com/search/label/Untouch (untouch N°1 for the IB and untouch N°2 for the test). Fred
	@ 2012-03-03 2:46 AM (#6837 - in reply to #6832) (#6837) Top
debmohanty Country : India	debmohanty posted @ 2012-03-03 2:46 AM Rohan Rao - 2012-03-02 9:33 AM I find it convenient when the diagonal lines of Anti Diagonal are given. It doesn't matter much but maybe if others prefer it too, it could be added. Google search for Anti Diagonal Sudoku showed this link at the top - http://rohanrao.blogspot.in/2010/03/rules-of-anti-diagonal-sudoku.h...
	@ 2012-03-03 2:48 AM (#6838 - in reply to #6832) (#6838) Top
Fred76 Posts: 337 Country : Switzerland	Fred76 posted @ 2012-03-03 2:48 AM Rohan Rao - 2012-03-02 9:33 AM I find it convenient when the diagonal lines of Anti Diagonal are given. It doesn't matter much but maybe if others prefer it too, it could be added. Looking forward to a 'sudoku' test (after more than a month). All players can answer the poll in the beginning of this thread. From my point of view it does not matter, but as I don't play, I'll not answer the poll. Rohan, I noticed that anti-diagonal that are on your blog have no diagonal lines given . But I can add them if a majority of players want, there is no problem for me. Fred
	@ 2012-03-03 5:41 AM (#6839 - in reply to #6837) (#6839) Top
Fred76 Posts: 337 Country : Switzerland	Fred76 posted @ 2012-03-03 5:41 AM debmohanty - 2012-03-03 2:46 AM Rohan Rao - 2012-03-02 9:33 AM I find it convenient when the diagonal lines of Anti Diagonal are given. It doesn't matter much but maybe if others prefer it too, it could be added. Google search for Anti Diagonal Sudoku showed this link at the top - http://rohanrao.blogspot.in/2010/03/rules-of-anti-diagonal-sudoku.h... Yes, but we must admit that this guy, Mister Rohanrao Blogspot, doesn't look very serious ! Does anybody know him ?
	@ 2012-03-03 7:35 AM (#6840 - in reply to #6774) (#6840) Top
zachpuzzle Posts: 14 Country : United States	zachpuzzle posted @ 2012-03-03 7:35 AM This will be the first sudoku test that i participate instead of doing afterward so i am so excited
	@ 2012-03-03 10:07 AM (#6841 - in reply to #6840) (#6841) Top
vopani Posts: 739 Country : India	vopani posted @ 2012-03-03 10:07 AM Ok people. I lose. There's been some major problem with my blog (which is supposed to be resolved by 1st week of March), so I'm hoping to start posting again from Monday :-)
	@ 2012-03-03 11:30 AM (#6842 - in reply to #6839) (#6842) Top
prasanna16391 Posts: 1801 Country : India	prasanna16391 posted @ 2012-03-03 11:30 AM Fred76 - 2012-03-03 5:41 AM Yes, but we must admit that this guy, Mister Rohanrao Blogspot, doesn't look very serious ! Does anybody know him ? I'm not sure.. I think he's some foreigner... Rohan Rao - 2012-03-03 10:07 AM Ok people. I lose. There's been some major problem with my blog (which is supposed to be resolved by 1st week of March), so I'm hoping to start posting again from Monday :-) Looking forward to it Mister Rohanrao Blogspot.
	@ 2012-03-03 2:52 PM (#6843 - in reply to #6840) (#6843) Top
Fred76 Posts: 337 Country : Switzerland	Fred76 posted @ 2012-03-03 2:52 PM zachpuzzle - 2012-03-03 7:35 AM This will be the first sudoku test that i participate instead of doing afterward so i am so excited Great !
	@ 2012-03-05 12:08 AM (#6844 - in reply to #6774) (#6844) Top
prasanna16391 Posts: 1801 Country : India	prasanna16391 posted @ 2012-03-05 12:08 AM Should've kept "no" and "does not matter" as two separate options in the poll, now the people who wanted it might get out voted by people to whom it didn't matter. Of course this is in hindsight, it just struck me.
	@ 2012-03-06 9:11 AM (#6848 - in reply to #6774) (#6848) Top
Administrator Country : India	Administrator posted @ 2012-03-06 9:11 AM Examples Online All examples are available online now. Please check the submission page, and report any inconvenience.
	@ 2012-03-07 1:59 PM (#6853 - in reply to #6774) (#6853) Top
David McNeill Posts: 63 Country : United Kingdom	David McNeill posted @ 2012-03-07 1:59 PM Hope to participate in this test. Is it possible to mark the arrows in a paler colour in Arrows Battle Sudoku? Thank you, David McNeill.
	@ 2012-03-07 2:55 PM (#6854 - in reply to #6853) (#6854) Top
Fred76 Posts: 337 Country : Switzerland	Fred76 posted @ 2012-03-07 2:55 PM David McNeill - 2012-03-07 1:59 PM Hope to participate in this test. Is it possible to mark the arrows in a paler colour in Arrows Battle Sudoku? Thank you, David McNeill. Done for the test grid ! Fred
	@ 2012-03-09 3:05 AM (#6856 - in reply to #6854) (#6856) Top
Fred76 Posts: 337 Country : Switzerland	Fred76 posted @ 2012-03-09 3:05 AM As there is a big majority in the poll who said that it were not better to have marked diagonal in the anti-diagonal sudoku (or it does not matter) , I'll not add them. Sorry for the 7 people who voted for marked diagonals in the anti-diagonal sudoku, I hope you'll have fun solving this grid despite that. Fred
	@ 2012-03-09 4:03 AM (#6857 - in reply to #6856) (#6857) Top
Para Posts: 315 Country : The Netherlands	Para posted @ 2012-03-09 4:03 AM Fred76 - 2012-03-09 3:05 AM As there is a big majority in the poll who said that it were not better to have marked diagonal in the anti-diagonal sudoku (or it does not matter) , I'll not add them. Sorry for the 7 people who voted for marked diagonals in the anti-diagonal sudoku, I hope you'll have fun solving this grid despite that. Fred I just find it handier to know any marked diagonal means different digits.
	@ 2012-03-09 10:44 AM (#6860 - in reply to #6857) (#6860) Top
Administrator Country : India	Administrator posted @ 2012-03-09 10:44 AM Sudoku instructions in Chinese in sudokufans.org.cn forum
	@ 2012-03-09 1:25 PM (#6861 - in reply to #6774) (#6861) Top
swaroop2011 Posts: 668 Country : India	swaroop2011 posted @ 2012-03-09 1:25 PM Please help me out to solve this "QUEEN SUDOKU" further... I am thereby attaching a photo of how much i was able to solve(logically). I dont want to solve it by guess as this is the practice puzzle.. (queen_sudoku.png) Attachments ---------------- queen_sudoku.png (18KB - 3 downloads)
	@ 2012-03-09 2:34 PM (#6862 - in reply to #6861) (#6862) Top
prasanna16391 Posts: 1801 Country : India	prasanna16391 posted @ 2012-03-09 2:34 PM swaroop2011 - 2012-03-09 1:25 PM Please help me out to solve this "QUEEN SUDOKU" further... I am thereby attaching a photo of how much i was able to solve(logically). I dont want to solve it by guess as this is the practice puzzle.. I got through this one by a complex work through of where the 9s can and can't be, first of all I'd suggest you put the 8 in R1C1, as the 5-7 pair take up the below row and the 9 in the middle omits a 9 in either of the main diagonals. After that, either just look at the 9s and think hard about the possibilities with the queen rule, or find another way and tell me as well
	@ 2012-03-09 5:21 PM (#6863 - in reply to #6862) (#6863) Top
Fred76 Posts: 337 Country : Switzerland	Fred76 posted @ 2012-03-09 5:21 PM prasanna16391 - 2012-03-09 2:34 PM swaroop2011 - 2012-03-09 1:25 PM Please help me out to solve this "QUEEN SUDOKU" further... I am thereby attaching a photo of how much i was able to solve(logically). I dont want to solve it by guess as this is the practice puzzle.. I got through this one by a complex work through of where the 9s can and can't be, first of all I'd suggest you put the 8 in R1C1, as the 5-7 pair take up the below row and the 9 in the middle omits a 9 in either of the main diagonals. After that, either just look at the 9s and think hard about the possibilities with the queen rule, or find another way and tell me as well This grid is perhaps a bit hard for the instructions booklet. Prasanna is right, you must study the 9's and try to find a contradiction. I think it's the only possibility to crack this grid. For example, if you try to put a 9 in R6C1, then you have a 9 in R9C3 (only option is that box), then it has to be in R8C9 (only option in this row), then in R4C7 and then you cannot place a 9 in column 8. So you know that R6C1 is not a 9, and then it becomes easier to finish the grid. (queen_swaroop.png) Attachments ---------------- queen_swaroop.png (19KB - 4 downloads)
	@ 2012-03-09 6:16 PM (#6864 - in reply to #6863) (#6864) Top
Fred76 Posts: 337 Country : Switzerland	Fred76 posted @ 2012-03-09 6:16 PM I've just published a grid which will help you to immerse in a diagonal world smoothly, with just a classic sudoku : http://sudokuvariante.blogspot.com/2012/03/sudoku-classique-n1.html Fred
	@ 2012-03-09 11:06 PM (#6865 - in reply to #6774) (#6865) Top
swaroop2011 Posts: 668 Country : India	swaroop2011 posted @ 2012-03-09 11:06 PM Hey to Prassana and Fred, for helping it out.. Will try now and see. It is the tough one in comparison to all other grids. :)
	@ 2012-03-09 11:52 PM (#6866 - in reply to #6774) (#6866) Top
Administrator Country : India	Administrator posted @ 2012-03-09 11:52 PM Announcements 1. Password protected pdf is uploaded. It has 12 pages. There is no cover page. 2. If you are solving online, no need to submit again using paper mode. 3. Paper only link - http://logicmastersindia.com/M201203S/?paper=1
	@ 2012-03-10 6:00 PM (#6867 - in reply to #6774) (#6867) Top
neerajmehrotra Posts: 329 Country : India	neerajmehrotra posted @ 2012-03-10 6:00 PM grt grids....thanks Fred and Team LMI!!!
	@ 2012-03-11 9:27 PM (#6874 - in reply to #6774) (#6874) Top
rajeshk Posts: 542 Country : India	rajeshk posted @ 2012-03-11 9:27 PM Thanks Fred for creating this great test and thanks to LMI team for hosting it flawlessly.
	@ 2012-03-11 10:10 PM (#6875 - in reply to #6774) (#6875) Top
prasanna16391 Posts: 1801 Country : India	prasanna16391 posted @ 2012-03-11 10:10 PM This is easily the longest I've stayed in the top 10 of an LMI test. That might be more to do with them being extended to Monday though
	@ 2012-03-12 1:09 AM (#6876 - in reply to #6875) (#6876) Top
Fred76 Posts: 337 Country : Switzerland	Fred76 posted @ 2012-03-12 1:09 AM prasanna16391 - 2012-03-11 10:10 PM This is easily the longest I've stayed in the top 10 of an LMI test. That might be more to do with them being extended to Monday though No doubt: you become a sudoku specialist !