preface
Sudoku solution method
Modified Sudoku
STAGE 1
STAGE 2
STAGE 3
SPECIAL STAGE
HINT
SOLUTION

Take on the incredibly difficult Sudoku puzzles that will surpass your imagination.
Top-tier Sudoku puzzles and solutions explained to help you become a great Sudoku master.

Sudoku is the most popular puzzle in the world.
Although Sudoku has been introduced with various types and levels of difficulty and has been loved by people all over the world, true Sudoku enthusiasts have always been thirsty for more sophisticated and high-level Sudoku.
《Super Sudoku 200 Extremely Difficult Problems》 will perfectly quench this thirst and present you with a Sudoku experience of a higher level than you have ever experienced before.
Each problem is meticulously designed by Sudoku experts and puzzle experts, maximizing the sense of accomplishment and pleasure you feel when solving the puzzle.


Dive into the new world of Sudoku and experience a whole new level of fun that will blow away all the boredom and listlessness you've felt so far.
No matter how difficult a problem is, it can be solved if you approach it with clear logic.
Imagine the fun and pleasure you will feel when you open the door to the answer that was tightly locked after much thought.
Now, a high-quality Sudoku puzzle awaits your challenge, transforming you from a Sudoku fanatic into a great Sudoku master.

Break through the stages and push your limits.
A meticulously designed step-by-step Sudoku puzzle

《Super Sudoku 200 Extremely Difficult Problems》 is comprised of four stages.
'STAGE 1' is an advanced level of Sudoku, and consists of problems that can be solved in a reasonable amount of time by puzzlers who enjoy Sudoku.
Once you pass the first hurdle and enter "STAGE 2," you'll encounter challenging Sudoku puzzles that require the intermediate-level and higher-level methods explained in this book. Compared to STAGE 1, you'll be able to solve more challenging puzzles and a wider variety of Sudoku types.
When you reach the final 'STAGE 3', you will encounter the essence of Sudoku puzzles.
Every problem has a hidden, high-difficulty trick, and requires a lot of time and effort to solve, utilizing a variety of solutions ranging from intermediate to advanced.
As the name suggests, 'SPECIAL STAGE' is where you can find special types of Sudoku.
You will be able to fully enjoy the fun of solving Sudoku by experiencing the unique rules and solutions of each type.

Even if you encounter a difficult problem and hit a wall, there is no need to be frustrated.
This is because hints are provided in three stages for each problem.
These hints will not only help you whenever you need a clue on your journey to find the answer, but will also add a unique fun element to solving the puzzle.
Some hints can be so powerful that they can fill in all the blanks in a problem with just one hint.
Only when you persist in solving seemingly insurmountable puzzles without giving up will your skills truly evolve.

Improves logical thinking and concentration
The best brain development program

Sudoku only has the basic rule of 'filling in the numbers 1 to 9 in the 9 squares of a 3x3 box, in the horizontal and vertical rows.'
However, solving the problem requires a high level of concentration.
If you let your guard down for even a moment, numbers will start to overlap everywhere, and you'll have to go back to the beginning.
Once you start solving the puzzle, you will be on edge trying to fill in the numbers from 1 to 9 without repeating them.

The appeal of Sudoku lies, above all, in its logical thinking and reasoning.
According to the rules, you have to think of the number that goes in the next square and compare it with the numbers in the other squares.
In this way, puzzlers naturally train their brains by scientifically inferring and logically arranging numbers.
Solving Sudoku can help you improve your concentration, memory, and logical thinking.
Sudoku is also addictive, making it impossible to put the book down until the last square is filled in.
The thrilling sense of accomplishment you feel when you fill in all the squares is also an undeniable part of Sudoku's appeal.
Let's experience the truly challenging Sudoku, where neither guesswork nor luck can be used, and only logic can win.