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Administrator
   
Country : India | Logic Masters India announces May Sudoku Test — Something is Missing
Author : Jakub Hrazdira (Gotroch )
Date : 28th and 29th May
Length : 100 minutes
IB and Submission Link : here
Theme : In each of these mostly standard Sudoku variants, some important clue or information will be missing. |
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Minfang Lin
Posts: 40
Country : China | |
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swaroop2011
Posts: 668
Country : India | NONCONSECUTIVE
i think the question is wrong.
as well as the solution given is different from question.
in question at r5c4 it is 3 but in solution it is 1.
Number X Is Alive
i didnt understood the rules.
can u be little bit more clear.
i mean which cages have same number.
in solution some have 6 whereas some have 16. |
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debmohanty
Country : India | Number X Is Alive : The sum of digits in all cases "end" with same digit. So it is just the unit digit which is same
6 16 26
or
11 21 so on
This unknown unit digit is known as X |
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Administrator
Country : India | LMI flash interface is not well equipped for solving some of the Sudokus in this round, especially Draw A Jigsaw, Toroidal, Hidden Sum Blackout, and to some extent Incomplete Sums
We are discussing how we can tackle this situation. An announcement in this respect is due. |
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swaroop2011
Posts: 668
Country : India | debmohanty - 2011-05-22 10:39 AM
Number X Is Alive : The sum of digits in all cases "end" with same digit. So it is just the unit digit which is same
6 16 26
or
11 21 so on
This unknown unit digit is known as X
thank you and what about nonconsecutive |
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swaroop2011
Posts: 668
Country : India | hey
Hidden SUm Blackout is also having a wrong solution
in question at r5c3 it is 3 and r3c3 it is 4
but it solution it is given as 6 and 3 respectively .
please do check it out.. |
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Administrator
Country : India | swaroop2011 - 2011-05-22 11:12 AM
thank you and what about nonconsecutive
swaroop2011 - 2011-05-22 11:47 AM
hey
Hidden SUm Blackout is also having a wrong solution
in question at r5c3 it is 3 and r3c3 it is 4
but it solution it is given as 6 and 3 respectively .
please do check it out..
we'll update the IB |
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Gotroch
Posts: 83
Country : Czech Republic | Gotroch posted @ 2011-05-22 2:54 PM Administrator - 2011-05-22 1:09 PM
swaroop2011 - 2011-05-22 11:12 AM
thank you and what about nonconsecutive
swaroop2011 - 2011-05-22 11:47 AM
hey
Hidden SUm Blackout is also having a wrong solution
in question at r5c3 it is 3 and r3c3 it is 4
but it solution it is given as 6 and 3 respectively .
please do check it out..
we'll update the IB
Swaroop2011 - Thanks for finding mistakes, corrected version of the IB was uploaded. Edited by Gotroch 2011-05-22 3:13 PM
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rakesh_rai
Posts: 774
Country : India | For Incomplete Sums, is it necessary that all the missing numbers (the red ones in the example) be different? |
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Gotroch
Posts: 83
Country : Czech Republic | Gotroch posted @ 2011-05-22 6:35 PM rakesh_rai - 2011-05-22 6:28 PM
For Incomplete Sums, is it necessary that all the missing numbers (the red ones in the example) be different?
No, it is only coincidence. |
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swaroop2011
Posts: 668
Country : India | can anybody help me out with how to get start in TOROIDAL.
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Gotroch
Posts: 83
Country : Czech Republic | Gotroch posted @ 2011-05-22 10:16 PM swaroop2011 - 2011-05-22 9:46 PM
can anybody help me out with how to get start in TOROIDAL.
There are only 9 possible ways how to arrange the lines to form sudoku with 3x3 boxes.
You can easily eliminate 8 of them if you imagine the lines in your mind. (usually because two same digits appear in one box ) |
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Administrator
Country : India | Administrator - 2011-05-22 10:52 AM
LMI flash interface is not well equipped for solving some of the Sudokus in this round, especially Draw A Jigsaw, Toroidal, Hidden Sum Blackout, and to some extent Incomplete Sums
We are discussing how we can tackle this situation. An announcement in this respect is due.
We tried to enhance the flash interface for solving, but online solving experience was not much better (especially for Draw A Jigsaw / Toroidal / Hidden Sum Blackout )
So we decided that there won't be any flash interface for solving for this test. |
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beat
Posts: 5
Country : Poland | beat posted @ 2011-05-24 5:23 PM !!! Incomplete sums can have multiple solutions e.g.
413+25+6
536+14+2
245+63+1
152+46+3
361+52+4
624+31+5
AM I right? or I'm missing something? |
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Fred76
Posts: 337
Country : Switzerland | Fred76 posted @ 2011-05-24 5:46 PM beat - 2011-05-24 5:23 PM
!!! Incomplete sums can have multiple solutions e.g.
413+25+6
536+14+2
245+63+1
152+46+3
361+52+4
624+31+5
AM I right? or I'm missing something?
Beat,
On this puzzle we don't see very well the 2x3 box, but they exist  . Your solution doesn't respect standard sudoku rules (concerning these 2x3 box ).
Fred |
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Gotroch
Posts: 83
Country : Czech Republic | Gotroch posted @ 2011-05-24 5:47 PM beat - 2011-05-24 5:23 PM
!!! Incomplete sums can have multiple solutions e.g.
413+25+6
536+14+2
245+63+1
152+46+3
361+52+4
624+31+5
AM I right? or I'm missing something?
In your solution, you have repeated digits in 2x3 boxes. |
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Fred76
Posts: 337
Country : Switzerland | Fred76 posted @ 2011-05-24 5:55 PM beat - 2011-05-24 5:23 PM
I'm missing something?
Yes, but you're perfectly within the theme of this contest  |
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purifire
Posts: 460
Country : India | Hi Gotroch, I had a few Questions...
Torroidal
Do the shapes have to be rectangular boxes or they can also be jigsaw shaped??
Draw a Jigsaw.
When we draw the shapes is it a must that an incomplete line has to be only an extension of the given part or we can start drawing a shape from any point even from the middle of a given segment??
Which digit is missing?
In this puzzle I see a T-shaped green line, is that supposed to be treated as one single green line where the sum of all digits is the common sum, or do we treat them as 2 different lines with one digit common?
Rishi |
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Gotroch
Posts: 83
Country : Czech Republic | Gotroch posted @ 2011-05-26 8:58 PM purifire - 2011-05-26 4:04 PM
Torroidal
Do the shapes have to be rectangular boxes or they can also be jigsaw shaped??
All shapes have to be 3x3 rectangular boxes. But as it is toroidal puzzle, these 3x3 boxes can wrap around edges.
As I wrote before you have only 9 possible ways how to arrange straight lines. (Theoretically you can arrange them in such way, that you create classic sudoku )
purifire - 2011-05-26 4:04 PM
Draw a Jigsaw.
When we draw the shapes is it a must that an incomplete line has to be only an extension of the given part or we can start drawing a shape from any point even from the middle of a given segment??
You can draw bold lines anywhere you want, but you have to satisfy the rule that if you have two neighbouring cells, divided by bold line ---> these two cells have to be in two different regions.
purifire - 2011-05-26 4:04 PM
Which digit is missing?
In this puzzle I see a T-shaped green line, is that supposed to be treated as one single green line where the sum of all digits is the common sum, or do we treat them as 2 different lines with one digit common?
For that T-shaped green line: Four cells are connected together - so common sum (X ) will be the sum of these 4 digits (1+6+3+0=10 ) |
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purifire
Posts: 460
Country : India | Gotroch - 2011-05-26 8:58 PM
purifire - 2011-05-26 4:04 PM
Torroidal
Do the shapes have to be rectangular boxes or they can also be jigsaw shaped??
All shapes have to be 3x3 rectangular boxes. But as it is toroidal puzzle, these 3x3 boxes can wrap around edges.
As I wrote before you have only 9 possible ways how to arrange straight lines. (Theoretically you can arrange them in such way, that you create classic sudoku )
purifire - 2011-05-26 4:04 PM
Draw a Jigsaw.
When we draw the shapes is it a must that an incomplete line has to be only an extension of the given part or we can start drawing a shape from any point even from the middle of a given segment??
You can draw bold lines anywhere you want, but you have to satisfy the rule that if you have two neighbouring cells, divided by bold line ---> these two cells have to be in two different regions.
purifire - 2011-05-26 4:04 PM
Which digit is missing?
In this puzzle I see a T-shaped green line, is that supposed to be treated as one single green line where the sum of all digits is the common sum, or do we treat them as 2 different lines with one digit common?
For that T-shaped green line: Four cells are connected together - so common sum (X ) will be the sum of these 4 digits (1+6+3+0=10 )
Thanks Gotroch... lovely set of puzzles... cant wait for the weekend : ) |
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Administrator
Country : India | Puzzle Booklet uploaded. It has 8 pages, including a cover page.
As announced earlier, there will not be any online solving mechanism in this test. |
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swaroop2011
Posts: 668
Country : India | hey urgent help i started the test now
but in kropki there is no dots visible in puzzle booklet.
plz help my time running out |
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debmohanty
Country : India | We have double checked all images and there is no problem in the image. |
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swaroop2011
Posts: 668
Country : India | i dont know then what the problem, idownloaded again but there are no white or black dots visible |
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debmohanty
Country : India | swaroop2011 - 2011-05-28 1:47 PM
i dont know then what the problem, idownloaded again but there are no white or black dots visible
Check my message
and if you can't solve a particular sudoku, move on to next sudoku |
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rvarun
Posts: 268
Country : India | rvarun posted @ 2011-05-28 4:45 PM The dots are missing in Puzzle #2 |
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Administrator
Country : India | Please note : the theme of the contest is "Something is Missing" - so some usual clues can be missing.
There is absolutely no problem in the pdf file. |
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Fred76
Posts: 337
Country : Switzerland | Fred76 posted @ 2011-05-28 6:05 PM I think I missed 60 points for just 2 or 3 seconds 
Deb, I can't see my result, is it normal?
Thanks for the test ! Beautiful but hard 
Fred |
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debmohanty
Country : India | Fred76 - 2011-05-28 6:05 PM
I think I missed 60 points for just 2 or 3 seconds You've missed more :- )
Fred76 - 2011-05-28 6:05 PM
Deb, I can't see my result, is it normal? No, let me check. Any specific error message that you get? |
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debmohanty
Country : India | Fred (and others who have already taken the test ),
To view score - Go to the submission page http://logicmastersindia.com/M201105S - Login if needed. Click on Start. After that you should be able to view scores. |
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Fred76
Posts: 337
Country : Switzerland | Fred76 posted @ 2011-05-28 6:18 PM debmohanty - 2011-05-28 6:12 PM
Fred (and others who have already taken the test ),
To view score - Go to the submission page http://logicmastersindia.com/M201105S - Login if needed. Click on Start. After that you should be able to view scores.
Thanks Deb !
Oh no, stupid mistake ! 65 pts lost very stupidely !
Aaaaargh ! |
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rvarun
Posts: 268
Country : India | rvarun posted @ 2011-05-28 6:58 PM Nice test. Especially Incomplete sums was awesome though I didnt finish it. I did it after the test. |
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Para
Posts: 315
Country : The Netherlands | Para posted @ 2011-05-28 11:33 PM Hi
I have a question before I start. Not sure if it can be answered but it will help me. I don't have access to a working printer this weekend, so will have to copy down the puzzles to paper. I just wanted to know if all grids besides the jigsaws will be in a standard 3x3 grid. Especially wondering for the instructionless, if this is something that you could give away. Will help me get my grids ready for when I start copying. hoping I don't copy a number wrong.. Sounds like an interesting set, so would still like to try. Think i'll have to skip the killer, not very practical. |
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Gotroch
Posts: 83
Country : Czech Republic | Gotroch posted @ 2011-05-28 11:49 PM Para - 2011-05-28 11:33 PM
Hi
I have a question before I start. Not sure if it can be answered but it will help me. I don't have access to a working printer this weekend, so will have to copy down the puzzles to paper. I just wanted to know if all grids besides the jigsaws will be in a standard 3x3 grid. Especially wondering for the instructionless, if this is something that you could give away. Will help me get my grids ready for when I start copying. hoping I don't copy a number wrong.. Sounds like an interesting set, so would still like to try. Think i'll have to skip the killer, not very practical.
All grids have 9x9 size. |
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motris
Posts: 199
Country : United States | motris posted @ 2011-05-29 8:18 AM Thanks for the amazing puzzles Gotroch. Some true 10-star puzzles here. Too bad something was missing from my brain while solving some of them, as a lot of mistakes at the start hurt my overall performance. |
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Pensador
Posts: 2
Country : Mexico | hey, i am new and i want to do the test right now but i dont know how to start? i already registered but how do i start it, if i put download it asks me for a password.
anyone arround there?
Edited by Pensador 2011-05-29 4:21 PM
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Administrator
Country : India | Goto the link
http://logicmastersindia.com/M201105S . First download the pdf (it is password protected )
Enter you userid, password and country.
Then it will take you to a page where it shows "Start Something is Missing". Click on this button. It will show you the password. open and print the pdf.
Solve and submit the answers.
Enjoy!
Hope 'Nothing is Missing' in my note
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Pensador
Posts: 2
Country : Mexico | Thank you administrator... I loved it... I submitted the correct answer for "incomplete sums" but i submitted it in "which digit is missing?" but i did was able to do the incomplete sums... lol,
Well, thanyou and see you in one month i guess,
Pensador |
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beat
Posts: 5
Country : Poland | beat posted @ 2011-05-29 7:37 PM HELP
I typed my login, password and the country. Then clicked login and the only thing which I see is "Connecting to server to get status". In other words, I cannot start my test. BIG disappointment.
Do I need any Java or what?
Edited by beat 2011-05-29 7:41 PM
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shreyas2k6
Posts: 2
Country : India | Hi,
I submitted 7 correct answers and it shows as 0/7. I sent in answers to Nonconsecutive, Kropki, Jigsaw, Toroidal, Incomplete Sums, Draw a Jigsaw and Which Digit is Missing? My user name is shreyas2k6 and I'm Shreyas for India.
Please check the same. I worked really hard on these puzzles :) |
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debmohanty
Country : India | beat - 2011-05-29 7:37 PM
HELP
I typed my login, password and the country. Then clicked login and the only thing which I see is "Connecting to server to get status". In other words, I cannot start my test. BIG disappointment.
Do I need any Java or what?
You don't need java. If you are able to see the login box, that means you don't need any additional software on your machine.
Can I suggest to refresh your page and try again? As per our database, you haven't started the test yet. So you can try to start again. |
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beat
Posts: 5
Country : Poland | beat posted @ 2011-05-29 8:04 PM I already refreshed that. Nothing.
I see buttons "start" and "show examples" but they are not acctive (grey) so I cannot proceed further.
The below, there is already mentioned "Connecting to server to get status".
Edited by beat 2011-05-29 8:07 PM
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Administrator
Country : India | beat - 2011-05-29 8:04 PM
I already refreshed that. Nothing.
I see buttons "start" and "show examples" but they are not acctive (grey) so I cannot proceed further.
The below, there is already mentioned "Connecting to server to get status".
This is really strange. I just made some changes and started the test for you. Can you refresh the page?
Let me know if you can see the password and the timer. If yes, your test has started.
I'll adjust the timer accordingly.
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beat
Posts: 5
Country : Poland | beat posted @ 2011-05-29 8:16 PM Sorry, still nothing. |
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Administrator
Country : India | |
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Administrator
Country : India | Pensador - 2011-05-29 6:25 PM
Thank you administrator... I loved it... I submitted the correct answer for "incomplete sums" but i submitted it in "which digit is missing?" but i did was able to do the incomplete sums... lol,
Well, thanyou and see you in one month i guess,
Pensador You should see the credit for "incomplete sums" in the score page.
Thank you for participating, and keep tab on the List of Monthly tests for the next puzzle and sudoku tests. |
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beat
Posts: 5
Country : Poland | beat posted @ 2011-05-29 9:57 PM There are no black and white kropki in kropki !!!
Edited by Gotroch 2011-05-29 10:06 PM
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Gotroch
Posts: 83
Country : Czech Republic | Gotroch posted @ 2011-05-29 10:07 PM For beat:
Administrator - 2011-05-28 4:48 PM
Please note : the theme of the contest is "Something is Missing" - so some usual clues can be missing.
There is absolutely no problem in the pdf file.
Edited by Gotroch 2011-05-29 10:08 PM
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prasanna16391
Posts: 1801
Country : India | Excellent puzzles, I did the silly silly idiotic mistake of putting the "Incomplete Sums" Answer key in the "X is Alive" space :( probably missed 60 points coz of that, would love to know if that answer was right. |
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rakesh_rai
Posts: 774
Country : India | Tricky and hard but enjoyable puzzles...Like Fred, I also missed 60 points by 2 or 3 seconds. |
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Fred76
Posts: 337
Country : Switzerland | Fred76 posted @ 2011-05-30 1:50 AM rakesh_rai - 2011-05-30 1:40 AM
Tricky and hard but enjoyable puzzles...Like Fred, I also missed 60 points by 2 or 3 seconds.
I ask myself why organizers chose a duration of 100 minutes and not 100 minutes + 4 seconds for this test |
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prasanna16391
Posts: 1801
Country : India | Haha that always happens to me in all other tests but in this one I got the answer in a few seconds before time but like I said earlier I got it into the wrong place :D |
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Administrator
Country : India | prasanna16391 - 2011-05-30 1:31 AM
Excellent puzzles, I did the silly silly idiotic mistake of putting the "Incomplete Sums" Answer key in the "X is Alive" space :( probably missed 60 points coz of that, would love to know if that answer was right. The answer is wrong by few digits :- ) |
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Administrator
Country : India | Since no one is participating right now, "Something is Missing" is now officially over.
No doubt tough Sudokus, but motris breezed through 9 of them, and takes the first position. uvo, deu and misko take the next positions.
Among Indian results, Rakesh and Rohan take top 2 positions with respectable scores, and prasanna takes 3rd position. |
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brianklimek
Posts: 14
Country : United States | Hello - I attempted to start this too late. I would still like to download the contest and attempt the puzzles, but it seems you cannot do that this time. I cant get the password when I log on. Can you please provide it? Thanks. |
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Administrator
Country : India | Password will be automatically be displayed after 7:10AM (Indian time ), anyway here is the password - 28_Good_5_Luck_29
Or, you can download the booklet without password from the downloads section |
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brianklimek
Posts: 14
Country : United States | Hey, thanks very much! |
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debmohanty
Country : India | Fred76 - 2011-05-30 1:50 AM
rakesh_rai - 2011-05-30 1:40 AM
Tricky and hard but enjoyable puzzles...Like Fred, I also missed 60 points by 2 or 3 seconds.
I ask myself why organizers chose a duration of 100 minutes and not 100 minutes + 4 seconds for this test
120 minutes would have been more appropriate - at least couple of players could have completed, but I'm not sure.
Some of the puzzles were very hard - as I see from the score page, lots of players last submitted puzzles long time before their scheduled end time (e.g. Ulrich 23 minutes )
In any case, I thought it was a nice theme, and a nice set of puzzles. I especially liked NonConsecutive - I have never seen (or thought about ) an NC puzzle with only odd or even digits. |
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motris
Posts: 199
Country : United States | motris posted @ 2011-05-30 7:07 AM I made an all even NC "Getting Even" for Mutant Sudoku, but I enjoyed Gotroch's just as much here. I'm inspired to attempt a 2-number NC sometime soon. The challenge isn't getting a valid puzzle, so much as getting an interesting puzzle that a normal person can solve. I also completely expected the Kropki to have no dots and enjoyed solving that puzzle with negative inference as well.
My biggest downfall was starting on the Instructionless. Looking at it while the test was printing was a perfect use of the time, but then breaking the puzzle and catching it on checking, only to restart, was not a good use of 15 minutes for 30 points. While the test might have timed perfectly without us making mistakes, with so many hard puzzles I bet a few of us, myself included, found needing to start over or from a fresh printout to be absolutely necessary.
Edited by motris 2011-05-30 7:13 AM
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debmohanty
Country : India | Good luck with 2-digits NC - it sounds too difficult to make (as well as to solve)
Missing dots in Kropki was very much expected line and it fitted the theme perfectly, but there were at least 3 posts saying "hey, the pdf file has some problem and I can't see the dots in Kropki". We edited those posts during the test, and unedited later.
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motris
Posts: 199
Country : United States | motris posted @ 2011-05-30 7:34 AM The first time I encountered nonconsecutive was in a section of Japanese nanpure variants that was consecutive and then suddenly lost all the bars. It was a really fun discovery. I suppose I'm fully spoiled to get the "no dots is not a problem" experience now, but I can appreciate the comments others had on the Kropki.
One thing I've learned with making NC is that it is incredibly easy to specify just 1 puzzle but very difficult for a human to appreciate the packing constraints that give it just one solution. That's why I liked the smoothness of the NC on this test a whole lot, for doing a very limiting theme. But to show it's not impossible, these six givens form a valid 1-digit NC, but I've yet to work through the whole puzzle logically to get to the solution:
_ _ _ | _ _ _ | _ _ _
_ 3 _ | _ _ _ | _ _ _
_ _ _ | _ _ _ | _ 3 _
------+-------+------
_ _ 3 | _ _ _ | _ _ _
_ _ _ | _ _ 3 | _ _ _
_ _ _ | _ _ _ | _ _ _
------+-------+------
_ _ _ | _ 3 _ | _ _ _
_ _ _ | _ _ _ | 3 _ _
_ _ _ | _ _ _ | _ _ _
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harmeet
Posts: 87
Country : India | harmeet posted @ 2011-05-30 12:18 PM Excellent puzzles, Jakub!
Lost lot of time in "which digit is missing" because i forgot a rule that all digits on the connected green line are different; realizing it just in time.
the instructionless puzzle is still intriguing me... can anyone help in letting know the instructions?
Best regards.
Edited by harmeet 2011-05-30 12:20 PM
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debmohanty
Country : India | harmeet - 2011-05-30 12:18 PM
the instructionless puzzle is still intriguing me... can anyone help in letting know the instructions?
I must admit that I didn't get it for a while.
Instead of revealing the answer, let me give you a clue.
Just focus in the grid box-wise (i.e. analyze each box individually)
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prasanna16391
Posts: 1801
Country : India | Administrator - 2011-05-30 4:49 AM
prasanna16391 - 2011-05-30 1:31 AM
Excellent puzzles, I did the silly silly idiotic mistake of putting the "Incomplete Sums" Answer key in the "X is Alive" space :( probably missed 60 points coz of that, would love to know if that answer was right. The answer is wrong by few digits :- )
Thats good to know, I guessed once towards the end knowing time was running out and I didn't want to miss submission by few seconds again  |
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shreyas2k6
Posts: 2
Country : India | Hi,
I submitted 7 correct answers and it shows as 0/7. I sent in answers to Nonconsecutive, Kropki, Jigsaw, Toroidal, Incomplete Sums, Draw a Jigsaw and Which Digit is Missing? My user name is shreyas2k6 and I'm Shreyas for India.
Please check the same. I worked really hard on these puzzles :) |
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debmohanty
Country : India | shreyas2k6 - 2011-05-30 1:45 PM
Hi,
I submitted 7 correct answers and it shows as 0/7. I sent in answers to Nonconsecutive, Kropki, Jigsaw, Toroidal, Incomplete Sums, Draw a Jigsaw and Which Digit is Missing? My user name is shreyas2k6 and I'm Shreyas for India.
Please check the same. I worked really hard on these puzzles :) I thought you exactly know why you have got 0 even after submitting 7 puzzles correctly. |
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utkaarsh
Posts: 89
Country : India | I played to the theme of "Something is Missing" , For Instructionless -missed typing the 3 in column A answer of 249157(3)86, need to get myself a new keyboard ....
organisers can this be given a marginal benefit of doubt, rest 17 nos are in correct order
But the puzzle was the best i liked, difference was same as the box no ... nice one !!
Edited by utkaarsh 2011-05-30 1:59 PM
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debmohanty
Country : India | Unlike puzzle tests, in Sudoku tests we don't allow any overrides.
No points for for missing a digit OR swapping 2 digits OR typing same digits twice (all of these happen pretty regularly)
The only override we allow in Sudoku tests is row/column swaps (i.e. entering Row A digits in Row B and vice versa) OR if a given clue is typed wrongly.
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rob
Posts: 170
Country : Germany | rob posted @ 2011-05-30 3:09 PM I thought the puzzles were all beautiful. I particularly loved "Draw A Jigsaw".
After performing quite poorly on the test, I've since gone through and solved them all. I eventually got through all of them quite smoothly, with the exception of the toroidal sudoku, so I'm wondering if I missed an easier break-in there. Here's how I could solve it:
1. Note several immediate pairs that need to be separated (4-4-4, 9-9, 8-8).
2a. If the column separator is index 0 (before column 1), the second 4-4 forces the row separator to index 0 (so classical sudoku). But then the bottom right square can't have a 5.
2b. Column separator index 1 forces row separator index 1 by the pairs from step 1.
2c. Column separator index 2 forces row separator index 1 or 2 to separator the 9-9 pair. In row 7, the 8 can go in two places, forming two potential 8-8 pairs, none of which are separater by column index 2 or row index 1.
We're left with options (1,1) and (2,2).
3. In row four, the 1 must go in column 1 with either option.
4?. Looking at row 7, columns 7 and 8 can only contain 19 and 18, respectively. Here, I somehow deduced that these must be 9, 1, forcing option (1,1). I can't figure out this step anymore at the moment.
Cheers
Robert
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utkaarsh
Posts: 89
Country : India |
Subject: Re: Something is Missing — LMI May Sudoku Test — 28th and 29th May @ 2011-05-30 2:07 PM (#4600 - in reply to #4599)
Unlike puzzle tests, in Sudoku tests we don't allow any overrides.
No points for for missing a digit OR swapping 2 digits OR typing same digits twice (all of these happen pretty regularly)
The only override we allow in Sudoku tests is row/column swaps (i.e. entering Row A digits in Row B and vice versa) OR if a given clue is typed wrongly.
fair enough 
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uvo
Posts: 21
Country : Germany | uvo posted @ 2011-05-30 3:50 PM debmohanty - 2011-05-30 6:48 AM
120 minutes would have been more appropriate - at least couple of players could have completed, but I'm not sure.
Some of the puzzles were very hard - as I see from the score page, lots of players last submitted puzzles long time before their scheduled end time (e.g. Ulrich 23 minutes)
During these 23 minutes, I managed to break the "Draw a Jigsaw" puzzle twice - it wasn't that difficult, but placing the same digit twice in the same area surely doesn't help. I wonder how many chances I get to beat Thomas on a Sudoku contest...
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harmeet
Posts: 87
Country : India | harmeet posted @ 2011-05-30 4:52 PM
Got it... so easy with the clue... thanks for not sharing the instructions.
Edited by harmeet 2011-05-30 4:54 PM
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RJH0723
Posts: 13
Country : United States | RJH0723 posted @ 2011-05-30 6:08 PM Could anyone please show the break-in for the Draw A Jigsaw? |
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rob
Posts: 170
Country : Germany | rob posted @ 2011-05-30 6:26 PM RJH0723: Let me know if this is not detailed enough.
1. Consider the 4 in the last column, and the 2 in the second to last column. Note that the 2's area can't escape to the bottom left, and deduce that there's not enough space for the 2 and 4 to be in separate areas.
2. Consider the 2 in the first row, and note that its area can't reach row four, so it needs to connect to one of the given 1s. |
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RJH0723
Posts: 13
Country : United States | RJH0723 posted @ 2011-05-30 8:20 PM Thanks. I got it from there. I just needed a place to start. |
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anderson
Posts: 16
Country : United States | Thanks for a really nice test, Gotroch. Nonconsecutive with all evens was cool, Incomplete Sums and Which Digit is Missing both had great presentation and were good puzzles in themselves, Draw a Jigsaw was really nice, etc. Definitely a hard but fun and satisfying set of puzzles! |
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Para
Posts: 315
Country : The Netherlands | Para posted @ 2011-05-31 12:17 AM Thanks for the puzzles. They were really nice. If I hadn't literally broken every puzzle I eventually solved, I would have gotten a lot more done. Not my best performance, but enjoyed it none the less. |
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Gareth
Posts: 17
Country : United Kingdom | Gareth posted @ 2011-05-31 4:33 AM I really enjoyed the non-consecutive in particular - a very satisfying "aha" moment when I realised how it worked. These moments are always best, I find, when they take more than a few seconds to arrive but less than a few minutes, and this puzzle had it just right. :) |
Something is Missing — LMI May Sudoku Test — 28th and 29th May