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Sudoku

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Experience the thrill of Sudoku online! Crack the code, fill in the grids and watch your talents unfold. Improve your times and become the ultimate Sudoku master! A brain workout that never gets boring!

Challenges

Clueless
Clueless
Carnation
Carnation
Endings and Beginnings
Endings and Beginnings
The Gray Wolf
The Gray Wolf
Forget Me Not
Forget Me Not
Chocolate Chips
Chocolate Chips
Summer School
Summer School

Medals

Basic
Basic
Expert
Expert
Genius
Genius
Strategist
Strategist
Sapphire
Sapphire
Emerald
Emerald
Ruby
Ruby
Diamond
Diamond

Help

Sudoku is a popular logic based puzzle game where you have to fill a 9x9 grid with numbers from 1 to 9. The object is to place the numbers so that each row, each column and each of the 3x3 sub grids contains all the numbers from 1 to 9 without repetition. Here is a step-by-step guide to help you solve Sudoku puzzles:

1 . Start by analyzing the Sudoku grid:
Look at the initial numbers that are already provided. These will be located in different cells of the grid.
Identify any blockages or restrictions already present that can help you fill in the rest of the grid.

2. Look for a row, column or 3x3 box that looks promising:
Start with what's given: Look at the initial numbers provided in the puzzle. These are usually called "givens" or "clues." Begin by focusing on any filled cells and see if you can deduce any numbers based on the given information.

3. Analyze the available options:
Examine each row, column, and 3x3 box individually. Look for any numbers that are missing and try to determine their placement based on the givens and the numbers you've already filled in. Use logic and process of elimination to narrow down the possibilities.

4. Use the exclusion method:
For each empty cell, analyze the corresponding row, column, and box to determine the possible numbers that can go in that cell. Cross off any numbers that are already present in those groups. If a cell has only one possible number remaining, that's the correct number for that cell.

5. Use the narrowing method:
Look for singletons: A "singleton" refers to a number that can only appear once in a particular row, column, or box. Scan the rows, columns, and boxes to identify any singletons and fill in the corresponding cells.

6. Trial and error method and use of the pencil:
If you've reached a point where you can't find any obvious placements using the previous methods, you can select a cell and fill in one of the possible numbers with the pencil.
Continue filling in the rest of the grid with the pencil tool based on the selected number and see if that leads to a solution.
If that leads to an inconsistency or a Sudoku rule violation, try another option and repeat the process until you find the correct value.

7. Repeat steps 2-6 until the entire grid is filled correctly.
Remember that Sudoku is a challenging task that requires patience and logical thinking. With practice, you will get better at identifying patterns and finding the right solutions. Good luck solving Sudoku!

Stars

There are three levels of difficulty in Sudoku: Normal, Hard and Expert.
If you solve a Sudoku in Normal you get 2 stars, in Hard you get 4 stars and finally in Expert you get 6 stars per solved Sudoku.

Tokens

When you play Sudoku you earn tokens.
- If you play in Normal each star has a value of 400 tokens
- If you play in Hard each star has a value of 800 tokens
- If you play in Expert each star has a value of 1,200 tokens.

To earn the maximum number of stars and tokens, the Sudoku puzzles must be solved as follows:

Normal- under 5 minutes
Hard - under 10 minutes
Expert- under 15 minutes

For every extra 5 minutes you spend on a Sudoku (regardless of the difficulty level), you earn 1 less star.
You will always earn a minimum of 1 Star for a completed Sudoku.

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