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No.
The most difficult levels require you to assume that a box is filled with one number or another. You pick one of the numbers, and then, you must follow the puzzle until you either solve it, or come to a impossible situation. Using the logical reasoning of "reductio ad absurdum", you then conclude that the number you picked WASN'T the correct number and start over from that junction point. It is VERY discouraging to have to resort to that technique, so I always play the ones that you can logically solve all the way whenever possible.
If there was an easy way to mark a board and erase the wrong entries, then it wouldn't be so bad. Perhaps I could use a dry erase board with a different color when I got to a junction. That way, all I'd have to do is erase all the guesses in that color.
There is another situation where you are forced to resort to guessing.
Not all of the people who make Sudoku puzzles are aware that you must check your new puzzle for conformity to rules of what exactly makes a Sudoku puzzle. As a result, there are an amazing number of producers of puzzles that simply have no clue that what they are producing are not at all Sudoku puzzles, but something that only looks EXACTLY LIKE a Sudoku puzzle. These supposed "Sudoku puzzles" have not one, but anywhere from 2 to hundreds of solutions. Naturally, it is not possible to solve such a "puzzle" with only logic, as logic will fail to reduce the number of choices down to only 1 solution, a necessary component of actual Sudoku puzzles.
You can check online at many websites to determine whether or not the puzzle you are working on is an actual Sudoku puzzle or not. It might just save your sanity! The number of erroneous Sudoku puzzles being published out there is legion! I have a hand held game device made in China that produces almost NO useful Sudoku puzzles. My mother got it for me. Thanks, Mom! Great present! *Note to readers: Beware bargain basement clearance bins. The merchandise is in there for a reason, and sometimes, that reason is because the product in the bin doesn't do anything useful, besides take your money.
There is a famous hedge in Japan, where the vegetation was planted to produce a Sudoku puzzle. You would think that people that go to that much trouble (manufacturing and planting) would also check to make sure that they produced a useful puzzle so that their efforts would not turn out to be totally wasted, but you would be mistaken. So, don't assume that just because you are looking at a grid of what appears to be a Sudoku puzzle, that it really is one.
I only get my puzzles from trusted authors now, and I haven't run in to a non-working Sudoku puzzle for months... I suggest that you start keeping track of who does a good job for you, and then only go to those places for your puzzles.
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Where can you copy a sudoku from?
Lovers of sudoku can visit the BrainBashers website where they can find daily sudoku games. Billions of free sudoku can also be found on Websudoku. This is unlimited and can be played on all devices such as android or Ipad.
Where could someone play Sudoku daily?
For those who love to play Sudoku daily then it may be worth checking out some online websites that offer Sudoku play 24 hours per day. Sites that offer Sudoko play are Yahoo games, Daily Sudoku and Sudoku Saviour. All these sites and more offer Sudoku daily play.
Given a Sudoku puzzle with only one right answer is it always possible to solve it without using trail and error?
Not always. There is a practically infinite number of grids that cannot be solved using even the most advanced techniques, including some that blur the line between logic and trial and error. A software and puzzle designer known as Ruud has compiled a list of 50,000 such puzzles, which can be found here: http://www.sudokuvault.com/top50000.zip Unfortunately, nearly all sudoku puzzles found in American publications are computer generated, so there is no guarantee you won't come across puzzles that cannot be solved logically, but a majority of them still can.
What is the highest number in a sudoku puzzle?
The puzzle known as "Al Escargot" (the snail) is currently considered the hardest Sudoku puzzle. It was created by a Finnish mathematician called Arto Inkala. One of the hardest Sudoku books available is "Extreme Sudoku" by Antoine Alary, not to be confused with "X-TREME Sudoku" by Nikoli & Co. or "Sudoku Xtreme" by Christopher Monckton, which are both an order of magnitude easier.
How do you solve killer sudoku?
All the rules to regular sudoku apply as well as each number in each "cage" (the boxes with dotted lines) must be unique and add up to the number inside the cage.
How could the issue of slavery in the US been solved without war?
The issue of slavery could have been solved without war by people realizing that all people are equal no matter the color of their skin. If people realized this, then the slaves would have been let go with no problems.
What is the puzzle similar to sudoku where you have to fill in the numbers so they are all connected?
You are possibly looking for Kakuro.
How is the problem solved in the fifth Harry Potter book solved?
That is why there is 7 books. The problems are all solved in the end of the 7th book.
Who did Ja Rule have a feud with?
* 50 Cent * Dr. Dre (solved) * Eminem (solved) * D12 (solved) * Obie Trice (solved) * DMX (possibly solved) * Busta Rhymes (solved) * All of G-UNIT RECORDS * All of SHADY RECORDS (solved) * All of AFTERMATH ENTERTAINMENT (solved)
How would you put the word cooperation in a sentence?
Team projects need cooperation from all participants. Without the cooperation of the witness the case could not be solved.
If you were to add up all the numbers in a single Sudoku puzzle what would be their sum?
Sudoku does not have any addition. You just have to make sure that each row, column and 'sub square' has each of the nine digits (1-9) only once.
Why can you not make a sudoku puzzle with all prime numbers?
I am assuming you are referring to a normal 3x3 sudoku grid, where you can only use the numbers 1-9 once in the grid, and by prime number you mean the 3digit number across and down the grid must be prime? For a number to be prime, it must end in 1, 3, 7 or 9. There are 5 places on the Sudoku grid for a number to finish and as you can only use a number once in sudoku you have one place left where the number can not be prime. This means the most you can have is 5 prime numbers.
