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Sudoku is a popular logical game with easy rules. In this game you will be given a grid of numbers and you should finish the grid by putting numbers into it. The numbers in a row or column or group cannot repeat, you can use your logical thinking to deduce what number should be in a given place. This puzzle provides excellent training for the logical mind.
Truly a simple logic game, millions of Sudoku enthusiasts worldwide will love this Sudoku online version. This web Sudoku brings the same charm of simple, yet addictive game play to those lovers of the M word. Yes, it's math. It's easy as picking out the right Sudoku number and placing it on a spot on the Sudoku board. Just make sure that there are no repetitions on the cells. So check left and right, up and down, to see if the number appears on the neighboring cells. If your numbers don't fit in, simply click on the X button to delete them out of the Sudoku Game box. But if they do, then you have just made a match made in Sudoku heaven.
Think fast and sharp, because the scores will dwindle if you take too much of your time. Taking a hint to fill up those spaces will also eat up your scores. Use it only when you feel like you're absolutely stuck on those combinations that you've made. Check your board once in a while to see if you have got some miscalculations on your Sudoku numbers. And most of all have a lot of fun while developing your brain's logic skills.
There are two basic strategies that you can use:
1) Find the only possible position of a number in a group (or row, or column), e.g.:
In the third group, consider the only possible position of the number 9:
As the first two rows of this group already have 9's, the only possible position of a 9 in this group is in the remaining block of the third row:
2) Find the only possible number that can appear in a block, e.g.:
Consider the highlighted block:
It cannot be 2, 3, 4, 5 (because they are in the same group), it cannot be 6, 7, 8, 9 (because they are in the same row), the only possible number is 1: