Sudoku Mood is an online platform for playing Sudoku puzzles. It offers various difficulty levels, hints, and features like note-taking and error-checking. You can play directly in your web browser and track your game time.
Features
Sudoku Levels
Offers multiple difficulty levels: Easy, Medium, Hard, Expert, and Extreme to challenge players of all skills.
Intelligent Hints
Provides hints intelligently by analyzing the puzzle to help users solve it without outright giving the answer.
Highlight Function
Allows players to highlight specific rows, columns, or numbers to help maintain focus and facilitate solving.
Mistake Limiting
Alerts players when they're trying to enter incorrect numbers to avoid mistakes.
Save and Play Later
Enables players to save their current game progress to continue playing at a later time.
User-Friendly Design
Designed to be simple and intuitive for both new and experienced players, ensuring easy navigation and gameplay.
Highlight Function
When you click on a cell containing a number, its row, column, and block get highlighted. This helps identify relationships between numbers and potential placements.
Hints
A hint function that shows you where the next move was possible to aid in solving the puzzle without guessing.
Focus on Blocks
Encourages focusing on blocks where only a single cell might contain a particular number as a strategy to solve puzzles.
Highlight Function
Allows you to see how the highlight function works by clicking on a board cell that contains a number. Makes it easier to navigate the board and plan the next move.
Look for the Last Digit
Helps you identify a 3x3 block, row, or column with only one empty cell left, where the last digit needs to be placed.
Look for Hidden Singles
Encourages inspecting each 3x3 block to find a block where only one cell may contain a particular number. Works for all numbers.
Look for Naked Singles
Involves inspecting each empty cell to find the only number that can be placed in that cell. Useful for clearer sight of available moves.
Hints
Provides hints if you get stuck. Clicking the light-bulb button reveals how the next move was possible to help you understand better.
Highlight Function
Allows you to click on a board cell to see how the highlight function works, helping to navigate the board and find the next move.
Hints
Provides hints while playing. Click on the light-bulb button to see what the next move should be if you're stuck.
Pencil Notes
Allows you to use pencil notes to jot down options for cells. You can toggle this on or off based on your preference.
Solving Techniques Guide
Offers detailed strategies like Last Digit, Hidden Single, and more advanced methods to solve hard Sudoku puzzles.
Pencil Notes
Allows you to make small notes within each cell to keep track of possible candidates.
Hint Function
Provides hints when you're stuck and helps improve solving skills.
Extreme Sudoku Mode
Offers a challenging Sudoku game mode suited for advanced players. It requires advanced solving techniques like X-Wing and Swordfish.
Notes Feature
Allows players to use pencil notes to keep track of possible numbers for each cell, essential for solving Extreme Sudoku.
Hint System
Provides hints to help players when they are stuck, though hints require using pencil notes.
9x9 Grid
The Sudoku grid is divided into 3x3 blocks, with a total of 9 blocks. Each cell belongs to one row, column, and block.
Constraints
Each digit must only appear once in each row, column, and 3x3 block. This ensures the uniqueness constraint for all digits.
Logical Solving
Sudoku can be solved by logically deducing the numbers that can fill the cells, avoiding guessing. Cells are filled by eliminating other possibilities.
Last Digit
Look for a row with only one empty cell left. Then find out what digit is missing in that row and fill the empty cell with it. This works for columns and 3x3 blocks. Example: You can place digit 9 in row 7 if it’s missing.
Hidden Single
Select a 3x3 block and a digit. Check how many cells in that block can contain the selected digit. If only one such cell exists, fill it with the digit. Applicable for rows and columns.
Naked Single
Select a cell and check how many digits are allowed in that cell. If only one digit is allowed, fill the cell with that digit. A digit is permissible if it’s not in the same row, column, or 3x3 block.
Daily Sudoku Challenges
Choose the difficulty level and play the daily Sudoku puzzle. Available difficulties include Easy, Medium, Hard, Expert, and Extreme.
Archive & Statistics
Access previous puzzles and view your statistics for completed games.
High-quality puzzles
The service uses modern algorithms to create unique Sudoku puzzles, ensuring they are interesting and challenging for human players.
Respect for users
The website shows a minimal amount of ads and avoids obtrusive advertising to maintain a good user experience.
User friendly
The platform focuses on simplicity and functionality, making Sudoku accessible and enjoyable for everyone.
Learning and improvement
Sudoku Mood provides hints and logical explanations for the next moves to help users learn and improve their strategy without guessing.
Step By Step Solution
This feature provides a step-by-step solution to your Sudoku puzzle. Each step is explained and visualized to help you understand the solving process.
Next Step
This feature shows the next possible moves in your Sudoku puzzle. It explains each available move and highlights the easiest ones to try first.
Solve Mode
Displays the solved grid of the entered Sudoku puzzle. This is useful for verifying if the puzzle is solved correctly.
Play Mode
Allows you to play your own Sudoku on the website, using all Sudoku Mood's features, including hint functions.
Last Digit Technique
This technique involves looking for a row, column, or 3x3 block with only one empty cell. The missing digit in that row, column, or block must be placed in the empty cell.
Hidden Single Technique
Explains the Sudoku technique of identifying a 'Hidden Single' where a digit can only go in one cell within a block. This method involves checking each cell in the 3x3 blocks, rows, and columns to identify unique placements.
Demo Section
Provides an interactive demo that allows users to click or use arrow keys to navigate between examples of the hidden single technique.
Guidelines for Finding Hidden Singles
Offers detailed instructions on how to identify hidden singles by checking blocks, rows, and columns for digits that can only fit in one position.
Comparison with Naked Single
Clarifies the difference between 'hidden single' and 'naked single' techniques in Sudoku to help users understand when to apply each method.
Naked Single Explanation
Describes the Naked Single technique in Sudoku, which involves selecting a cell and checking how many digits are allowed. If only one digit is allowed, that digit can be filled.
Interactive Examples
Provides visual examples that demonstrate how to identify a Naked Single in a Sudoku puzzle.
Comparison with Hidden Single
Explains the difference between Naked Single and Hidden Single techniques, highlighting that Naked Single is when there is only one allowed digit in a cell.
Last Digit
Look for a row, column, or 3x3 block with only one empty cell left. Determine which digit is missing and fill the empty cell with it.
Hidden Single
Select a 3x3 block and a digit. Check how many cells in that block can contain the digit. If only one cell can, fill it with the selected digit. The same method applies to rows and columns.
Naked Single
Select a cell and check how many digits are allowed in that cell. If only one digit is allowed, fill the cell with it. This is valid if the digit doesn't appear in the same row, column, or 3x3 block.
Difficulty Levels
Select from multiple difficulty levels such as Easy, Medium, Hard, Expert, and Extreme to play Sudoku puzzles.
Number Entry
Easily enter numbers into the Sudoku grid using the number pad with digits from 1 to 9.
Notes
Use the Notes feature to jot down possible numbers in each cell, aiding in solving complex puzzles.
Undo
Undo moves to correct mistakes or try different strategies without starting over.
Erase
Delete incorrect numbers from the grid to find the right solution.
Hints
Get hints to assist you in solving the puzzle when you're stuck.
New Game Button
Start a new Sudoku puzzle anytime with the 'New Game' button.