2006-12-30 22:47:03 · 10 answers · asked by MVK 1 in Science & Mathematics ➔ Mathematics
the #s 1 thru 9 in each row
in each column
and in each of the 9 blocks of 9 squares, with no repeats and each # used once in each.
you develop your own method based on what you can eliminate
*a 2 cant be here here or here, but could go here or here... but if it goes here then where do I put the 4,... ect... its is a logical way of processing the data.
2006-12-30 22:51:37 · answer #1 · answered by beanie_boy_007 3 · 0⤊ 0⤋
Yes! I figured it out after doing hundreds of them, without asking someone who knew the formula. But I will tell you, because I know how hard some of them are and without it I know it would take me many days to solve just one (start looking for the Sudoku puzzles marked "Super-Nightmare", "Einstien Genius", or "Mega-Extreme Super Hard" difficulty level).
First do the simple digits as per the instructions that can be found by google'ing Sudoku.
When you come to a dead end, put pencil markings of every possible digit in every box not containing an answer that you are sure is correct. Then look for a column, row or 3x3 that contains only 1 possible location for a digit, and that is where it goes.
When you run out of possibilities, go back to the simple instructions and repeat.
There are a select few possibile Sudoku puzzles ever created that cannot be logically completed even after all that (called, quite appropriately "Impossible" difficulty), some of which I have done by drawing up a copy of the puzzle and guessing the digit that goes in a box that has only 2 possible answers, and seeing where it leads. If you get it wrong on the guess, then you know the answer is the other digit. Then go back to the beginning of the instructions and repeat.
The most important thing when doing these is to remember to cross out possibilities in all the boxes that are no longer possible, once an answer has been determined for a box. So if you put a 9 in a box, then every 9 on the row and column where that 9 has been placed must be crossed out, plus all the 9s in that 3x3. This will often reveal that there is only 1 possibility left for another box, but finish the crossing out of the 9s first, regardless of how close you think you are to the end of the puzzle. If you cross out a possibility, and there are no other possibilities in that box, you MUST start from the very beginning again. A mistake like that can almost never be recovered. Same applies if you put two of the same number in a column, row or 3x3. Even when you think you've got it, check every row, column and 3x3 to ensure there are no repeats of digits left out.
2006-12-30 22:58:47 · answer #2 · answered by Bawn Nyntyn Aytetu 5 · 1⤊ 0⤋
No formula but some techniques might help. See attached link.
Otherwise you can use software to solve it for you, which run tons of trials to get to the answer for you, just as a human would do.
2006-12-30 22:52:19 · answer #3 · answered by Hotel Tango 2 · 0⤊ 0⤋
you need to fill in the grid so that every row, every column and every 3x3 box contains the digits 1 to 9, and only one instance of each number
2006-12-31 02:24:34 · answer #4 · answered by Anonymous · 0⤊ 0⤋
You just gotta make sure that the same number does not appear in the same row, column or box...
2006-12-31 04:45:34 · answer #5 · answered by Batman 1 · 0⤊ 0⤋
1-a software such as free yudoku program
2-trial and error method
2006-12-30 23:19:47 · answer #6 · answered by iyiogrenci 6 · 0⤊ 0⤋
i composed a PC program to solve sudokus. after i had done it i lost any interest in sudoku
2006-12-30 23:39:31 · answer #7 · answered by Anonymous · 0⤊ 0⤋
check out the link given below
http://www.sudoku.com/
2006-12-30 22:56:10 · answer #8 · answered by sayee 2 · 0⤊ 0⤋
no.just follw the rules of the game
2006-12-30 22:57:50 · answer #9 · answered by honey m 1 · 0⤊ 0⤋
no there is no formula
2006-12-30 22:53:04 · answer #10 · answered by Anonymous · 0⤊ 0⤋