How to solve SUDOKU manually | simple


How to solve SUDOKU manually and simple

SUDOKU [1] for the beginner there is only a bunch of numbers. But once you know the ground rules, you can start looking for structures that help you overcome the blur of watching these numbers.

Sudoko in essence is a variation of the game category “MEMORY”.

Basic rules of the game:

  1. Recognize the players. (Learn to recognize the individual components EASILY and QUICKLY: 1, 2, 3, 4, 5, 6 ,7 ,8 ,9)
  2. All rows must consist of the number 1 – 9. No same numbers can occur in the same row.
  3. All main squares must consist of the number 1 – 9. No same numbers can occur in the same main square.
  4. Know the related positions. Below are structures that help you to easily position certain sequences. (Positions of numbers may vary the places 1 – 6.)
  5. Follow through. When you have found a  correct number, you should look for the possibilities where the same number are located in the other main squares and fill in that correct number.
  6. Memorize the possiblities. Here is where Memory comes into play. To be able to fill in the correct numbers, you sometimes have to memorize in which row/colomn numbers can reside.

SEE THE LOGIC. Structures that make solving SODOKU more easy:

A. Fulfill the translated positions

––– 123 –––
––– 456 –––
123 ––– 456
123 ––– 456
––– 123 –––
––– 456 –––
1) Positions of the bold numbers
are interchangeable between
the red ones in the series.
123 ––– –––
456 ––– –––
––– 123 456
––– ––– 123
––– ––– 456
123 456 –––
2) You This works in both verticle
and horizontal positions.
123 ––– –––
––– 123 456
456 ––– –––
––– ––– 123
123 456 –––
––– ––– 456
3) All possibilities are in fact
variations on this theme:
––– 123 –––
123 ––– 456
––– 456 ––– 

B. Fulfill the related positions

––– –x– –––
–x– ––– –––
––– ––– –x–
––– ––– –x–
–x– ––– –––
––– –x– –––
No same number can occur
on the same row.
(Nor vertical, nor horizontal)
–x– ––– –––
––– –x– –––
––– ––– –x–
 ––– ––– –x–
––– –x– –––
–x– ––– –––

I have worked out these structures horizontally, but it works vertically as well.

  • Solving sudoku this way you don’t have to put “small” numbers in the empty squares as to remember the possibilities. Where my solving score was 10-20 minutes, the avarage is down to 3 – 5 minutes.
  • Always think of solving ‘B. Fulfill the related positions’ as you can!!

And when I can not solve it on paper (to many errors) I use sudoku-solutions.com to work it out on the computer. Some how it seems I “see” the possibilities better than when I am working it out on paper.

Any way I am hooked on SUDOKU – as you might have understood that already – mainly because I found these SIMPLE rules to solve this puzzle like SUDOKU.

Huib Salomons

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One Response to How to solve SUDOKU manually | simple

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