## Online Sudoku Puzzle Games

Sudoku is a classic puzzle game. The goal of sudoku puzzle players is to complete a 9x9 grid with numbers so that each row, column, and 33 segments include all digits between 1 and 9. Sudoku is a great brain game because it's a logic puzzle. If you play daily Sudoku puzzles, your concentration and total brain function will improve quickly.

### Sudoku Game History

• The Origins of Sudoku puzzles is thought to be based on Leonhard Euler's (a Swiss Mathematician) concept in "Latin Squares" in 1783, which was then revised and adapted by Howard Garns in 1979 to what is today known as Sudoku.

• This game is based on ancient number riddles. Many people, however, mistakenly believe that Sudoku originated in Japan. While the name is a combination of the Japanese characters 'Su' (number) and 'Doku' (single), the game is actually of Swiss origin.

• You're probably astonished to find that Sudoku isn't a Japanese game. It's bound to cause some consternation. Yes, the recreational potential of Sudoku was made feasible by its popularity in Japan, but that is not where it ends.

• The origin of sudoku puzzles is fascinating. In truth, it got to Japan via America, where it gained popularity after being rediscovered in a Japanese bookstore in 1997 by a retired Hong Kong judge named Wayne Gould. Number puzzles are very popular in Japan, therefore it's not surprising that it was discovered there. Only after 2004 did the game get viral in the rest of the world.

• You must admit that the history of Sudoku is fascinating and most likely not what you expected. The game's origins only serve to demonstrate the game's international appeal, regardless of race, age, or nationality. While Leonhard Euler may not have intended it, his Latin Squares notion is the very first origin of a game that has proven to be a worldwide success.

### What Are The Most Popular Sudoko Games?

The most popular Sudoku games are as follows:

1. Grid Sudoku.
2. Samurai.
3. Word Sudoku.
4. Jigsaw Sudoku.
5. Color Sudoku.
6. Image Sudoku.

Newspapers or magazines have these popular games. Nowadays, you can play free online sudoku games. Read to know more about these six games.

1. ### Grid Sudoku

Grids Sudoku game is commonly defined as x2, where x is the number of squares vertically or horizontally in a square cage, also sometimes called a house. Here are a few grid possibilities you might come across in this form:
• Four-wheel drive (2x2 in a cage).
• 9 x 9 (3x3 in a cage).
• 16 × 16 (4x4 in a cage).
• 25 × 25 (5x5 in a cage).

However, there exist grid patterns that do not adhere to this norm, such as 6x6.

1. ### Samurai

• Are these problems too simple for you? You might enjoy samurai sudoku. This sudoku game puzzle includes five overlapping 9x9 grids to provide a massive challenge.

• The overlapping bits follow the standard sudoku principles, but the rest of each board builds on those overlapping parts.

•  It's effectively the same as playing five individual sudoku games at the same time, except that the four corners of the outer puzzles are the same as the corners of the center puzzle.

• You may come with much larger puzzles, such as the one pictured above, as grid sizes vary. Good luck if you attempt these.
1. ### Word Sudoku

• There are a couple of sudoku variations that combine letters. In general, to understand this version, simply substitute the regular numbers with letters.

• Because the usage of letters allows words to be spelled, you may find hidden words within puzzles on occasion.

• These words are frequently as long as the puzzle grid's width or height. You can try playing word sudoku online games to test your language skills and vocabulary.
1. ### Jigsaw Sudoku

• The cages in all of the preceding stated sudoku puzzles have been squares.

• This homogeneity is thrown out the window in jigsaw sudoku by the use of cages in a variety of combinations.

• The structures themselves are frequently so interlocked that they resemble jigsaw puzzle pieces. This also opens up the possibility of some extremely creative puzzle ideas!

• Jigsaw Sudoku puzzles that have been colored in can be very fun to look at and play with.

• Jigsaw sudoku is more difficult to grasp and solve because most sudoku tips and tactics rely on the cages being rectangles or squares.

• Take the numbers you're used to seeing and assign them to a different hue.

•  The premise underlying each sudoku puzzle is the same, but the switch from numbers to colors creates an interesting variation.

• In number puzzles, you could have been able to take simple notes like "Possibly 1, 2, or 3"; in this variety, you must take color notes.

• This minor tweak implies that more information must be processed, making the game more difficult to play at times.

• Another way to use color is to define a cage or to delineate areas where all of the precise numbers must be used.
1. ### Color Sudoku

• Take the numbers you're used to seeing and assigning them to a different hue.

•  The premise underlying each sudoku puzzle is the same, but the switch from numbers to colors creates an interesting variation.

• In number puzzles, you could have been able to take simple notes like "Possibly 1, 2, or 3"; in this variety, you must take color notes.

• This minor tweak implies that more information must be processed, making the game more difficult to play at times.

• Another way to use color is to define a cage or to delineate areas where all of the precise numbers must be used.
1. ### Image Sudoku

• In this variant of sudoku, photos are used as inputs instead of colors or numbers, from time to time, symbols may also be used as inputs.

• This adds another element of intrigue; instead of numbers or colors, players must now consider potentially more details.

• Images with very tiny variances, such as the hieroglyphs in the problem seen above, produce extremely tough games.

• On the other side, visible disparities in photographs may make playing sudoku easier.

• Image-based sudoku puzzles can be a breeze when combined with reduced grid sizes.

•  When it comes to problems meant for younger sudoku players, this pairing is rather prevalent.

• Because of the nature of these riddles, physical reproductions may be difficult to come by. Numbers and even colors are far easier to enter on paper than intricate visuals. If you do come across a physical version, you may be requested to cut out and arrange the symbols in the grid rather than drawing them.

### Levels in Sudoku

The levels in Sudoku games range from sudoku easy to sudoku hard and expert level:

• Sudoku Easy level.
• Sudoku Medium level.
• Sudoku Hard level.
• Sudoku Very Hard level.
• Sudoku Expert level.

We always try the row-column scan first to discover the valid cell at any step. This is the most fundamental and straightforward strategy. When easy breaks by row-column scan become difficult to get, the Digit Subset Analysis approach is applied.

It is the identification of a single valid digit for a cell using Digit Subset Analysis, abbreviated as DSA. This technique is explored further in the concept section that follows. Cycles are formed wherever possible. A cycle is a valuable asset to have in every scenario, and cycles play an important role in achieving a speedy solution.

The concept and application of Cycles are detailed in the next section.

• You can wait for Cycles to form automatically in a column or row, but establishing a Cycle by DS analysis speeds up the solution process significantly.

• Filling each vacant cell with valid digit subsets is the last option that should only be used when required. This is a laborious and error-prone job. Strategically, it is preferable to postpone this time-consuming activity as much as feasible to achieve a faster answer.

• The entire DS population process is discussed in the section that follows. Experienced Sudoku players may do it as a routine.

• In a hybrid technique, a few of the cells of interest are filled with shorter-length DS and evaluated for a breakthrough, such as the formation of a Cycle.

• The lockdown of a single number in a row or column inside a 9 cell square is one of the most potent patterns that we have employed with consistently positive results. It removes the digit from all other DSs outside and inside the 9 cell square in the locked row or column. The single-digit lockdown technique is also covered in the section that follows.

• A rarer pattern is a four-cell single-digit lockdown in a rectangular configuration, which we have only found once. It is, of course, a superset of the single-digit lockdown and hence far more effective.

• The basic strategy should always be to use the simplest and quickest technique and path to the solution by constantly seeking essential patterns. Some of the most essential key patterns include digit lockdown, cycles, and valid cell by DSA.

• The main strategy for completing a difficult Sudoku puzzle is to use the technique that produces the best results the quickest. It's easy to say, but not so easy to do—it takes practice.

## How to Play Sudoku Game?

Read how to play the sudoku game below.

1. Sudoku's purpose is to fill a 9x9 grid with digits so that each column, row, and third section include numbers ranging from 1 to 9.

2. Some of the squares in the 9x9 grid will be filled in at the start of the game.

3. Your task is to complete the grid by using logic to fill in the missing digits. Remember that a move is improper if:
• There are multiples of the same number from 1 to 9 in any row.
• There are multiples of the same number from 1 to 9 in any column.
• There are multiples of the same number from 1 to 9 in any 33 grid.

After understanding how to play a sudoku game, let us have a look at sudoku tips.

### Sudoku Tips

Once you get the hang of it, Sudoku is a fun puzzle game to play. Simultaneously, playing Sudoku might be intimidating for newcomers. So, if you're a total newbie, here are some Sudoku pointers to help you improve your Sudoku skills.

#### Tip 1: Look for 5 or More Numbers in Rows and Columns of 33 Parts

Continue through the remaining vacant cells, experimenting with the numbers that haven't yet been utilized.  In many circumstances, numerals can only be placed in one spot due to the other numbers in the row, column, or 3-3 grid.

#### Tip 2: Divide the Grid Into Three Columns and Three Rows Visually

Each huge column will have three-thirds of a grid, and each row will have three-thirds of a grid. Now hunt for two of the same number in columns or grids. In the only remaining 9-cell area, there must be a 3rd copy of the same number. Take a look at each of the remaining 9 spots.

Play sudoku online and enjoy this game now that you know a little more about Sudoku.

### How to Win in Sudoko Games?

Read the tips below and use them when you play sudoku games online.

1. ### Concentrate On A Single Row, Column, or Square At A Time

Instead of worrying about the entire grid at once, concentrate on just one element of a square, row, or column. Work your way up until all 81 spaces are filled. Begin with a single square, then a row, and finally a column. You'll be able to solve the Sudoku grid much faster if you eliminate any other distractions.
2. ### Make Use Of Scanning Methods

Within each triple-box region, scanning techniques include scanning rows and columns. Then you delete numbers or squares until only a single number fits into a single square. You have the option of scanning in one direction, two directions, or for a single candidate.

If a cell can only hold one number, that number is the only one that can be used.
3. ### Avoid Making Educated Guesses

Sudoku is a methodical process of elimination, thus guessing your answers will result in you spending extra time on the puzzle. There are numerous tactics and techniques for determining which number belongs in which location. Move on if you're not sure what belongs there. If you're stuck on a particular square, try not to focus too much on it. Allow your gaze to stray to a different part of the grid to observe what additional possibilities exist.
4. ### Singles Who Aren't Covered

The naked single entails reviewing the values of filled cells in the box, row, and column to which the cell belongs to determine the candidate values of an empty cell. If there is just one possible value for an empty cell, that is most likely the value of that cell.
5. ### Singles Who Aren't Known

A hidden single is identical to a naked single in that it only impacts the candidates' cells. If a cell has a candidate that only appears once in the grid, it must be committed to that cell regardless of the other candidates in the cell. This means that for each digit and house, just one cell remains to place that digit. There are several candidates left in the cell, but the correct digit is concealed among them.
6. ### Make A Grid With Your Pencil

Writing little numerals within a square using a pencil is known as pencil marking. It's a technique for keeping track of the remaining candidates for cells that haven't been solved yet. The candidates are then crossed out or removed one by one. This will prevent you from becoming perplexed by the numerous options available.

There are a plethora of options for customizing the puzzle to your desire. What counts at the end of the day is that you have a good time.

DISCUSSION:

Sudoku is a deceptively innocent-looking puzzle, but it hides a graph coloring problem beneath the surface: these are well-known NP-complete problems. As a result, you must treat these puzzles with a bit more reverence than you might expect. Sudoku puzzles are categorized by difficulty, and this grading effectively gives you the anatomy of the problem: many puzzles are quite simple to solve easy sudoku to moderate sudoku puzzles with a little logic. You can play free sudoku games on the internet and check out your skills.

### Sudoku vs Poker

Sudoku: Sudoku is an indoor game. Logic is important when you play Sudoku games, and this game improves focus and concentration. As mentioned previously, the goal of players is to complete a 9x9 grid with numbers so that each row, column, and 33 segments include all digits between 1 and 9.

Poker: Poker is a game of skills. Players must make a poker hand of five cards. In case of a showdown, the best poker hand wins. Accurate decision-making and smart play are important when you play poker games. Online poker games are played for real money. Players aim to win cash prizes by beating their opponents. Poker is a competitive game. The player who beats all their opponents is declared as the winner of the game and takes away home big cash prizes.

### Play Online Poker & Win Real Money Daily

Online poker games are a great way to win real money. If you are interested in real money poker gaming, you can download the Poker app and choose from a variety of games such as texas hold 'em poker, Omaha poker, and many others. Play online poker games daily and Win up to Rs30000 daily! So what are you waiting for? Download the Spartan poker app and play today!

### Sudoku Game FAQs

1.) What is the trick of Sudoku game?

To begin a Sudoku puzzle, scan the rows and columns within each triple-box region, eliminating numbers or squares and looking for scenarios where just a single number can fit into a single square.

2.) Is Sudoku good for brain?

Yes. Sudoku is good for brain.

3.) What are the 3 rules of Sudoku?

Every square must have a single number. Only the numbers 1 through 9 are permitted to be used.

1. Each number from 1 to 9 can only appear once in each of the 33 boxes.

2. Each number from 1 to 9 can only appear once in each vertical column.

3. Each number from 1 to 9 can only appear once in each horizontal row.