Login Register WSPC 2017 • Schedule • Participation • Location • WSC • WPC • Contact •Search •Recent





Prime Exotica - LMI Jan 2011 Sudoku Test
   LMI Tests -> Monthly Sudoku and Puzzle Tests108 posts • Page 1 of 5 • 1 2 3 4 5
Administrator
Subject: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-12 4:03 PM (#3146) (#3146) Top


2000100050020
Location: India
Logic Masters India announces January 2011 Sudoku Test — Prime Exotica

Author: Rakesh Rai

Date: 22-23 January 2011

Sudoku Types: This test focuses on prime numbers and a few exotic variants.

Length: 101 minutes

IB and Submission Link

Instructions in Chinese - http://www.sudokufans.org.cn/forums/index.php?showtopic=195
rakesh_rai
Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-13 10:29 AM (#3152 - in reply to #3146) (#3152) Top



Mean Minis (2020) Author

Posts: 774
500100100202020
Location: India
Sudoku Types in Prime Exotica:

  • DNA Sudoku
  • MultiTab Sudoku
  • Poker Sudoku
  • Quad Sudoku
  • Tennisdoku
  • Kid Sudoku
  • Numerologidoku
  • Prime Number Sudoku
  • Rhombus Sudoku
  • Kombinance Sudoku
  • Peephole Sudoku
  • Product Sudoku
  • Rossini Sudoku
  • neerajmehrotra
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-13 5:24 PM (#3155 - in reply to #3146) (#3155) Top




    Posts: 328
    10010010020
    Location: India
    As per IB The sum of all corresponding numbers in the two strands is 10. But I think 10 is not possible in case of 6X6 grid............please confirm.
    Fred76
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-13 5:40 PM (#3156 - in reply to #3155) (#3156) Top



    Diagonal Vision Author

    Posts: 337
    10010010020
    Location: Switzerland
    neerajmehrotra - 2011-01-13 5:24 PM

    As per IB The sum of all corresponding numbers in the two strands is 10. But I think 10 is not possible in case of 6X6 grid............please confirm.


    I think Rakesh forgot to mention that for the DNA sudoku, 6*6 grid in the booklet: The sum of all corresponding numbers in the two strands is 6.

    For tournament grid, sum is 10 but for IB grid, sum is 6

    Fred
    rakesh_rai
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-13 7:31 PM (#3157 - in reply to #3156) (#3157) Top



    Mean Minis (2020) Author

    Posts: 774
    500100100202020
    Location: India
    Fred76 - 2011-01-13 5:40 PM
    neerajmehrotra - 2011-01-13 5:24 PMAs per IB The sum of all corresponding numbers in the two strands is 10. But I think 10 is not possible in case of 6X6 grid............please confirm.
    I think Rakesh forgot to mention that for the DNA sudoku, 6*6 grid in the booklet: The sum of all corresponding numbers in the two strands is 6.For tournament grid, sum is 10 but for IB grid, sum is 6 Fred
    Thanks Fred.

    A few things which got missed in the IB. This is only for the examples:
    - For DNA sudoku, the sum of corresponding cells is 6.
    - For Kid Sudoku, the kid cannot count or add beyond 6.
    - For Quad sudoku, 6 and 1 are considered consecutive.
    - For Poker Sudoku, there are only 2 hand types.

    For the actual grids, the given rules in the IB apply.
    Calavera
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-13 8:10 PM (#3158 - in reply to #3157) (#3158) Top




    Posts: 13

    Location: Germany
    I've spotted a small mistake in the example for the KID Sudoku: One of the 3s in the 5th row must be a 5. Haven't solved it yet so I'm not sure which.

    Also I'm not completely sure about the MULTITAB Sudoku: Is the three digit number in a cage always on the right/bottom? And is the one digit number always to the left/top of the two digit number?
    David McNeill
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-13 8:18 PM (#3159 - in reply to #3146) (#3159) Top


    Triplets & Triangles Author

    Posts: 63
    202020
    Location: United Kingdom
    Rakesh,

    Looks like a great puzzle set. The clue for the 5th row in Kid Sudoku should be 46353. Will the strands in DNA Sudoku cross each other? If so, it would be helpful to make the colours more easily distinguishable on a black and white printer. I assume that the prime numbers in Prime Number Sudoku will not necessarily be of 3 digits. Loved your 2011 fact.

    Thank you,

    David McNeill.
    rakesh_rai
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-13 8:23 PM (#3160 - in reply to #3158) (#3160) Top



    Mean Minis (2020) Author

    Posts: 774
    500100100202020
    Location: India
    Calavera - 2011-01-13 8:10 PMI've spotted a small mistake in the example for the KID Sudoku: One of the 3s in the 5th row must be a 5. Haven't solved it yet so I'm not sure which.
    You are right. It is 46353.
    Also I'm not completely sure about the MULTITAB Sudoku: Is the three digit number in a cage always on the right/bottom?
    Yes.
    And is the one digit number always to the left/top of the two digit number?
    Not necessarily. There will be one 1-digit number and one 2-digit number, whose product will be a 3-digit number. From the grid it will be clear which comes first - the 2-digit number or the 1-digit number.
    rakesh_rai
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-13 8:37 PM (#3163 - in reply to #3159) (#3163) Top



    Mean Minis (2020) Author

    Posts: 774
    500100100202020
    Location: India
    David McNeill - 2011-01-13 8:18 PM

    Will the strands in DNA Sudoku cross each other?
    No.
    I assume that the prime numbers in Prime Number Sudoku will not necessarily be of 3 digits.
    You are right. The prime numbers can be of any length from 1 to 9. :)
    rakesh_rai
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-13 11:35 PM (#3164 - in reply to #3163) (#3164) Top



    Mean Minis (2020) Author

    Posts: 774
    500100100202020
    Location: India
    Updated IB based on comments above is now available for download.
    caudmont
    Subject: RE: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-14 2:20 AM (#3167 - in reply to #3146) (#3167) Top


    SudoClones Author

    Posts: 18

    Location: France
    DNA : would the sum of cell A in orange strand and the same cell A in blue strand equal 10 ?

    Thanks



    Edited by caudmont 2011-01-14 2:21 AM
    rakesh_rai
    Subject: RE: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-14 9:47 AM (#3168 - in reply to #3167) (#3168) Top



    Mean Minis (2020) Author

    Posts: 774
    500100100202020
    Location: India
    caudmont - 2011-01-14 2:20 AM

    DNA : would the sum of cell A in orange strand and the same cell A in blue strand equal 10 ?
    That is a good question. I would repeat the relevant portion of the rules: "The sum of all corresponding numbers in the two strands is 10 (6 in the example)." - I hope you would have got your answer.
    tamz29
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-14 10:19 AM (#3169 - in reply to #3146) (#3169) Top




    Posts: 225
    10010020
    Location: Thailand
    Hi
    Looks like a wonderful test. I value presentation almost as much as the puzzle quality and this one may very well be the first to have both.
    Hopefully, I come back on Sunday night in time for it.
    Well done.
    utkaarsh
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-14 11:12 AM (#3170 - in reply to #3146) (#3170) Top




    Posts: 89
    20202020
    Location: India
    Rakesh, very very creative set of puzzles, with my limited knowledge, i found these the best & most innovative ones, very excited for this one
    caudmont
    Subject: RE: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-14 5:14 PM (#3171 - in reply to #3168) (#3171) Top


    SudoClones Author

    Posts: 18

    Location: France
    rakesh_rai - 2011-01-14 9:47 AM

    caudmont - 2011-01-14 2:20 AM

    DNA : would the sum of cell A in orange strand and the same cell A in blue strand equal 10 ?
    That is a good question. I would repeat the relevant portion of the rules: "The sum of all corresponding numbers in the two strands is 10 (6 in the example)." - I hope you would have got your answer.


    Thanks
    akash.doulani
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-14 5:59 PM (#3173 - in reply to #3146) (#3173) Top


    SM 2020 (Math) Author

    Posts: 157
    1002020
    Location: India
    one question regarding tennisdoku. in a situation where the set is given as 1:0 , does the first number have to be greater than the second one or it could be both ways ?
    rakesh_rai
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-14 6:10 PM (#3174 - in reply to #3173) (#3174) Top



    Mean Minis (2020) Author

    Posts: 774
    500100100202020
    Location: India
    akash.doulani - 2011-01-14 5:59 PMone question regarding tennisdoku. in a situation where the set is given as 1:0 , does the first number have to be greater than the second one or it could be both ways ?
    Thanks for asking this question, Akash.

    In a "x:y" situation, x is the number of sets won and y is the number of sets lost. So, a "1:0" means 1 set won and 0 sets lost. And a set can be won in many ways: 6-1, 6-2, 6-3, 6-4, 7-5, 7-6, 8-6 and 9-7. so the two cells in question will have one of these "final scores".

    To answer your question precisely, the answer is Yes. For a "1:0" situation, the first number has to be greater than the second one. I hope this helps clarify your doubt.
    purifire
    Subject: RE: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-14 8:07 PM (#3175 - in reply to #3146) (#3175) Top



    Odd Even & Twisted Classics (SM 16/17) Author

    Posts: 460
    100100100100202020
    Location: India
    Very Interesting sudokus... nice twists Rakesh... Looking forward to the test.... :)

    ps. Thanks for letting me know my numerological number

    Rishi
    akash.doulani
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-14 8:25 PM (#3176 - in reply to #3146) (#3176) Top


    SM 2020 (Math) Author

    Posts: 157
    1002020
    Location: India
    will the clues(i.e the numbers that appear in each type ) be given for poker sudoku or we will have to find out the numbers ourselves?
    rakesh_rai
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-14 9:30 PM (#3177 - in reply to #3176) (#3177) Top



    Mean Minis (2020) Author

    Posts: 774
    500100100202020
    Location: India
    akash.doulani - 2011-01-14 8:25 PM

    will the clues(i.e the numbers that appear in each type ) be given for poker sudoku or we will have to find out the numbers ourselves?
    Akash: This is mentioned clearly in the IB.

    "The repeating number in three of a kind/ four of a kind will be given. For full house, two numbers will be given, one of which will form a “pair” and the other will represent “three of a kind”. For Two pair, again two numbers will be given, both of which will form “pair”. For sequence, the first and last number will be given as clues."

    So you do not have to find out the numbers. With the given clues, you'll probably need to find out which hand type will be on which line.
    Para
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-16 3:32 AM (#3180 - in reply to #3146) (#3180) Top




    Posts: 315
    100100100
    Location: The Netherlands
    For Prime Number sudoku, are we provided with a list of prime numbers made up of different digits? Because to be honest I don't know all prime numbers by head between 1 and 9 digits (I don't even know them past 2 digits), or be able to figure out if for example 7142957 (which is) or 7148563(which isn't) is a prime or not on the spot. Becaused the file I found to confirm if these numbers were or weren't, contains 1 million numbers. And I don't exactly feel like sorting through it to filter out all primes that only contain different digits, just for the sake of being able to solve the sudoku.
    purifire
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-16 12:02 PM (#3182 - in reply to #3177) (#3182) Top



    Odd Even & Twisted Classics (SM 16/17) Author

    Posts: 460
    100100100100202020
    Location: India
    In the Numerologidoku, can the resultant number be flipped. as in example you mentioned that when I add up the letters I get 63. So is only 63 to be used or it can be flipped to 36?

    Rishi
    rakesh_rai
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-16 3:22 PM (#3185 - in reply to #3182) (#3185) Top



    Mean Minis (2020) Author

    Posts: 774
    500100100202020
    Location: India
    purifire - 2011-01-16 12:02 PM

    In the Numerologidoku, can the resultant number be flipped. as in example you mentioned that when I add up the letters I get 63. So is only 63 to be used or it can be flipped to 36?
    Rishi: Flipping is not allowed. (also because this is not the FLIP LMI Test )

    As mentioned in the IB, All “clue numbers” in the shaded cells read from left to right. - without flipping. So, if one of the clues is RISHI, we'll have to fill 63 in two consecutive shaded cells in the same row, reading left to right.
    rakesh_rai
    Subject: Re: Prime Exotica - LMI Jan 2011 Sudoku Test @ 2011-01-16 3:41 PM (#3186 - in reply to #3180) (#3186) Top



    Mean Minis (2020) Author

    Posts: 774
    500100100202020
    Location: India
    Para: I was expecting this query and I'm glad you asked it.
    Para - 2011-01-16 3:32 AM

    For Prime Number sudoku, are we provided with a list of prime numbers made up of different digits?
    No.
    Because to be honest I don't know all prime numbers by head between 1 and 9 digits (I don't even know them past 2 digits), or be able to figure out if for example 7142957 (which is) or 7148563(which isn't) is a prime or not on the spot. Because the file I found to confirm if these numbers were or weren't, contains 1 million numbers.
    From the IB: "...prime numbers are like life. They are very logical but you could never work out the rules, even if you spend all your time thinking about them."
    Anyway, Prime Exotica is not a test of memory. So its perfectly alright if you do not remember a list of prime numbers. However, there are a few basic techniques to find out if a number is not a prime number (for example, one such link is here). You may like to go through these once.
    And I don't exactly feel like sorting through it to filter out all primes that only contain different digits, just for the sake of being able to solve the sudoku.
    I agree with you. This is not needed anyway.

    In my opinion, if you approach the puzzle with an open mind and only basic knowledge of prime numbers, you should be able to solve it.
    rakesh_rai
    Subject: Prime Exotica - Anonymous Ratings @ 2011-01-17 11:43 AM (#3192 - in reply to #3186) (#3192) Top



    Mean Minis (2020) Author

    Posts: 774
    500100100202020
    Location: India
    A feature being tried out this time is that of "anonymous ratings". On the score page, the average rating and number of solvers who rated will still be visible. But A cannot see ratings given by B (and vice-versa).
    108 posts • Page 1 of 5 • 1 2 3 4 5
    Jump to forum :
    Search this forum
    Printer friendly version