Sudoku

The most fascinating brain game

Sudoku is the most fascinating brain game often called as Rubik's cube of 21st century, but it is more than that. From a 3 year old child to an 80 year old person can enjoy Sudoku in her own way.

Strengths of Sudoku

The strength of Sudoku lies not only in its variety and depth, but significantly in its range of difficulty levels, its total freedom from any knowledge on any subject, its ability to pose challenge to the intellect in a smoothly rising gradient as well as its proven effect in enhancing the concentration and power of thinking.

Sudoku improves your problem solving and pattern recognition abilities

We are confident that playing Sudoku improves pattern recognition and problem solving abilities if you play it systematically in a controlled manner. This is the reason why Sudoku is introduced reportedly in schools and even used in a few organizations for recruitment of employees.

Sudoku is very popular

These are only a few of the reasons for its widespread popularity all over the world. Practically every newspaper carries Sudoku games along with its usual offering of Crossword puzzles. Books to large collections of Sudoku game boards are available in various media including the mobile app library.

A great companion

If you really want to pass your time without depending on a second person playing a brain game that won't tire you out ever, start learning and playing Sudoku.

Endless challenge to intellect

We became interested in Sudoku because of its ability to pose endless challenge to the mind without taxing your mind or any other resource. This is especially important today as the trend is towards fragmentation of human communication.

Reason for our focus on Sudoku

While going into this new world of Sudoku only a year back and enjoying its challenges, we found many people interested in the game but unable to go forward. Now we know the reasons because of our focus on efficient problem solving.

Through these pages on Sudoku we will address those large number of people interested in Sudoku, having access to the wonderful game boards all around but facing a block unable to go forward.

As usual our focus will be the beginners and those who want to refresh their Sudoku playing skills. Our interest will always start right from the ZERO base point.

We will start with a series of detailed step by step solution and explanation of Sudoku game boards.

Fourth level hard Sudoku puzzle 6, Strategies Techniques and Solution

Submitted by Atanu Chaudhuri on Wed, 22/04/2020 - 23:14

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This is the 6th puzzle session at fourth level of hardness of very hard category. This is a very hard puzzle with multiple bottlenecks to overcome right from the start. Valid DS evaluation for empty cells needs to be done early but in selected cells and limited to 3 digit long DSs. Cross-scan of row, column and 9 cell square, Digit subset analysis, Single digit lockdown and advanced use of Cycles provide the main breakthroughs. Solution of each step with strategies and techniques adopted are explained fully ...

Fourth level hard Sudoku puzzle 5, Strategies Techniques and Solution

Submitted by Atanu Chaudhuri on Tue, 21/04/2020 - 17:39

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This is the 5th puzzle session at fourth level of hardness of very hard category. This is a very hard puzzle with multiple bottlenecks to overcome right from the start. Valid DS evaluation for empty cells needs to be done early but in selected cells and limited to 3 digit long DSs. Cross-scan of row, column and 9 cell square, Digit subset analysis and advanced use of Cycles provide the main breakthroughs. Solution of each step with strategies and techniques adopted are explained fully ...

Fourth level hard Sudoku puzzle 4, Strategies Techniques and Solution

Submitted by Atanu Chaudhuri on Mon, 20/04/2020 - 16:15

This is the 4th puzzle session at fourth level of hardness of very hard category. This is found to be really a very hard puzzle with multiple bottlenecks to overcome right from the start. Valid Digit subset evaluation to a large extent needed to be done very early that indicates the hardness of the puzzle. Digit subset analysis, Cycles and digit lockdown techniques are the primary techniques and resources used for overcoming the bottlenecks. A new structure of multiple parallel scans is discovered and converted to a new technique for the first time. Solution of each step with strategies and techniques adopted explained fully ...

Fourth level very hard Sudoku puzzle 3, Strategies Techniques and Solution

Submitted by Atanu Chaudhuri on Sun, 19/04/2020 - 00:20

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This is the 3rd puzzle session at fourth level of hardness that is placed in very hard category. This is found to be really a very hard puzzle with multiple bottlenecks to overcome right from the start. Valid Digit subset evaluation to a large extent needed to be done very early that indicates the hardness of the puzzle. Digit subset analysis, Cycles and digit lockdown techniques are the primary techniques and resources used for overcoming the bottlenecks. A new structure of chained single digit locks is discovered and converted to a new technique first time. Solution of each step with strategies and techniques adopted explained fully ...

Hard fourth level Sudoku puzzle 2, Strategies Techniques and Solution

Submitted by Atanu Chaudhuri on Sat, 18/04/2020 - 03:56

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This is the 2nd puzzle session at fourth level of hardness that is placed in very hard category. As expected, this is found to be a difficult puzzle with multiple bottlenecks to overcome even at late stages. Digit subset analysis, Cycles and digit lockdown techniques are the primary techniques and resources used for overcoming the bottlenecks. Solution of each step is explained fully with strategies and techniques adopted...

Hard fourth level Sudoku puzzle 1, Strategies Techniques and Solution

Submitted by Atanu Chaudhuri on Thu, 16/04/2020 - 01:07

This is the 1st puzzle session at fourth level of hardness that is supposed to be very hard. As expected, this is found to be a difficult puzzle with multiple bottlenecks to overcome even at late stages. Digit subset analysis, Cycles and digit lockdown techniques are the primary techniques and resources used for overcoming the bottlenecks. Solution of each step is explained fully...

How to solve hard third level Sudoku puzzle 13

Submitted by Atanu Chaudhuri on Tue, 14/04/2020 - 00:33

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This is the 13th puzzle session at third level of hardness. This is a difficult puzzle with multiple bottlenecks needed to be overcome and broken through. Digit subset analysis, 2, 3 and 4 cell Cycles and digit lockdown techniques are the primary techniques and resources used for overcoming the bottlenecks. Solution of each step is explained fully...

How to solve hard third level Sudoku puzzle 12 quickly

Submitted by Atanu Chaudhuri on Sun, 12/04/2020 - 18:41

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This is the 12th puzzle session at third level of hardness.The hardness of this puzzle arose primarily from the need to use Digit subset analysis and Cycle technique frequently for valid digit identification for a cell. Though the problem didn't pose a real hard bottleneck that needed special efforts to break though, for a large portion of solving process careful analysis was needed. Solution of each step explained fully...

How to solve hard third level Sudoku, Game play 11

Submitted by Atanu Chaudhuri on Thu, 09/04/2020 - 20:17

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This is the 11th game play session at Sudoku third level of hardness.The specialty of this game has been use of large number of cycles that helped at the start. Interesting has been the four cell single digit rectangular lockdown cycle, a special structure that provided the much needed breakthrough in this specially difficult Sudoku game. Solution of each step explained fully...

Learning problem solving through Sudoku, Interesting Sudoku Game Play 1

Submitted by Atanu Chaudhuri on Thu, 29/12/2016 - 23:43

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This is the first game in a new series of interesting Sudoku game play. In this game we will discover and apply new patterns of 4 digit long cycle and digit locking techniques based throughout on Digit Subset Analysis technique...