It is an excellent game that really tests your logic and problem solving skills.
Fill in the game board so that the numbers 1 through 9 occur exactly once in each row, column, and 3×3 box.
The numbers can appear in any order and diagonals are not considered.
Your initial game board will consist of several numbers that are already placed.
Those numbers cannot be changed.
Your goal is to fill in the empty squares and depending on the level you choose depends on how many empty squares you have to fill in.
On easy you have to fill in 28-31 empty cells. On medium you have to fill in 38-41 empty cells and on hard you have to fill in 48-51 empty cells.
The Roodoku board
Luckily for us the numbers light up if we hover our mouse over the certain number in smaller grid (the one that’s really tiny in a cage cell).
We can use this to our advantage. Regularly on each cage to start with there is a number that is already been put in at least 4-7 other cages.
If you just hover over each number and scan the surrounding cages you will soon find out which one it is. Then its just a process of elimination, but always try to start with the number that’s mostly already been put in for you.
You should always keep your eyes moving when your scanning individual numbers so you know which number is were before putting your number in.
Keep your eye out for highlighted numbers in your row, column or cage.
If you cant find the were the number goes then move to the next number and see what you can fill out.
If you go from 1-9 filling out the Roodoku in it might deem a little bit easier than you looking in cages for random numbers to go in.
So if you have to leave a number out then do so because you can come back to it later, and you usually find after you have been around the numbers once you can put a number in you had to leave out before.
Or can solve each cage individually but I must warn that there is a higher chance you could get muddled up, put too many numbers in a row or column or miss out numbers all together.
But if there are any single boxes in a cage, within a row or column try and work them out first because they will help you get closer to reaching your goal.
You can also try and do the rows and columns individually but this would be very hard and problems can easily arise this way.
You need a good balance between solving grids, columns and row.
And Lastly you have a very good strategy included in the game called “practice”.
Try having a few goes at this before you go at the real thing because it will get you in the right frame of mind for the game ahead and it will let you make your mistakes then instead of when you play the real thing.
The more you play Sudoku, the faster you would be able to notice the connections between the numbers and their correct placement. This is comparable to mind teasers which get better and easier to solve when you keep practicing them for better speed. – i_h8_this_game