This evaluation game is provided by Toutiao
1. Foreword
Recently, the author's head has been swollen. Of course, it's not that I am swollen, but my mind is really broken by a game.
And the reason why the author's head is big is the Sudoku game issued by indienova and contains three game modes: standard Sudoku, puzzle Sudoku, and killer Sudoku, and it claims to have tens of thousands of playable levels. "Sudoku Universe".
Second, the rules and development of Sudoku
Sudoku (Sudoku), as the name implies, means "single" number.
Sudoku is a kind of mathematical logic game, it is also a kind of logic game that requires paper and pen to do calculations like crossword puzzle. In the most widely known "standard Sudoku", players need to reason about all the blank spaces on the remaining board based on the known numbers on the 9×9 board, the order in which the numbers are filled in and needs to be satisfied, and the numbers in each row and column must contain 1-9 and cannot be repeated.
Every qualified Sudoku question has and only one correct answer. Any question that has no or multiple solutions is unqualified.
Although Sudoku seems simple to play, it is not. Through the arrangement and combination of numbers, the game changes can be described as quite complicated. The game designer will provide at least 17 hints for the player to make subsequent reasoning.
Generally speaking, people tend to think that the less the number of tips, the more difficult the game, and the more the number of tips, the game is relatively simple. In fact, there is no direct relationship between the two. Even with the same number of hints and the same puzzle graphics, various Sudoku puzzles with varying degrees of difficulty can be changed.
Because every combination of Sudoku final game can evolve more Sudoku questions.
In addition, the Sudoku game has nothing to do with the calculation of numbers, and the test is only for personal thinking and logic.
Therefore, many educators consider it to be one of the most significant ways to exercise the brain's thinking and logical ability.
Today, Sudoku (Sudoku) has appeared more and more forms, such as "Sudoku Universe" except for "standard Sudoku" In addition, there are two new Sudoku question types, "Killer Sudoku" and "Puzzle Sudoku". The gameplay and rules are also based on Sudoku's basic gameplay and improved.
Puzzle Sudoku is divided into nine parts on a 9x9 grid, but each part is no longer a standard 3x3 nine square grid, but an irregular area composed of nine connected squares. And you need to fill in numbers from 1 to 9 in each row, column, and each irregular area, without repetition.
The uniqueness of Killer Sudoku is that, on the basis of the standard Sudoku, it also integrates the gameplay of a number of games. The Sudoku grid will no longer be pre-filled with numbers as a reminder. Instead, the grid is divided into multiple dashed areas, and the sum of the numbers on all the grids in the area is given as a reminder.
Of course, in addition to the above three ways of playing, Sudoku also has more rich forms. For example: Diagonal Sudoku, Mini Sudoku, Irregular Sudoku, Skyscraper Sudoku, Zigzag Sudoku, Conjoined Sudoku and many other types exist. There are even more, loved by Sudoku everywhereInvented by the authors, brand new gameplay and types.
These Sudoku types are all born out of "standard Sudoku", so they are collectively referred to as "transformed Sudoku".
3. The origin and predecessor of Sudoku
The name Sudoku (Sudoku) originated in Japan, where "Sū" is in Japanese The middle means a number, while "doku" means a single meaning, which together means "only one number in each grid".
This is also the accepted English name of Sudoku.
However, the origin of Sudoku (Sudoku) is much earlier than it is called. And the rudiment of Sudoku, which is recognized by people, is the method of n-order proposed by Swiss mathematician Leonhard Euler in the early 18th century-Latin square matrix.
Latin square (English: Latin square) is an n × n square matrix. In this n × n square matrix, there are exactly n different elements, each of which is different The element of appears only once in the same row or column.
In the 1880s, a retired American architect invented a very interesting crossword based on the principle of "Latin Cube" . Later, this game began to appear in major newspapers in the United States. People at that time called this game "Number Place".
And this is also the earliest version of Sudoku that is currently recognized in the newspaper.
Time came in 1984, and "Number Place" spread and entered Japan. At the time, the intellectual game magazine "パズル通信ニコ" published by the company Nikori Co., Ltd. "Published this game and named it Sudoku.
And this is the origin of the name of Sudoku.
However, as early as thousands of years ago, our ancestors have researched the "predecessor" of Sudoku (Sudoku) and it has been widely spread today. It is the "jiugongge" recorded in Hetu and Luoshu.
According to legend, Hetu and Luoshu are auspicious signs granted by the heavens. They are considered to be the "source" of Chinese civilization and are also known as the "Cube of the Universe".
Hetu and Luoshu are the source of Chinese culture, Yin and Yang and Five Elements. Confucian scholars in the Han Dynasty believed that Hetu was the gossip, and Luo Shu was the "Hong Fan Jiuchou" in "Shang Shu". Hetu and Luoshu were first recorded in "Shangshu", and secondly in "Book of Changes". There are many records in hundreds of scholars. Tai Chi, Bagua, Zhouyi, Liujia, Jiuxing, Feng Shui, etc. can all be traced to this point.
"Shangshu" and "Gu Ming" article: "Dayu, Yiyu, celestial sphere, river map in the east sequence."
"Book of Rites·Riyun Chapter": "Water, fire, metal, wood, food and drink must be timely.... So the heavens fall, the earth comes out of the Liquan, the mountain comes out of the vehicle, the river comes out of the horse."
"The Analects of Confucius": "Zi said, the phoenix and the bird will not arrive, the river can not show the picture, I am already a husband!"
Zhou Zhiqi Society, said:'Destiny Zhou Wenwang will destroy the Yin and the kingdom.' Thai guests, the river out of the green map, the earth out of the yellow."
"Huainanzi·Chu Zhenxun": "The ancients are the best world,……Luo is out of the book of alchemy, the river is out of the green map"
"Yi·Ci" has: "He is out of the picture, Luo is out of the book, and the saint is from"
而洛The book is actually the nine palaces, which are arranged from 1-9. The sum of the horizontal, vertical and oblique numbers is 15. The "Nine Palaces" in the Chinese ancient book "Book of Changes" also originated from this, so it is called "Luo Book Nine Palaces".
So it has been handed down since ancient times: "Dai Jiu Lu, three left and seven right, two and four shoulders, six or eight feet, five in the center." So some people say Sudoku. The origin of Sudoku is in China and some places also call Sudoku "Nine-square grid" or "Nine-square grid Sudoku game".
Fourth, Sudoku Road
After talking so much, let us return the topic to the game.
In the "Sudoku Universe" game, whether the game is fun or not depends entirely on Personal hobbies and logical thinking ability.
For a veteran, a Sudoku problem may often take only a small period of time to solve. However, for beginners, the time for a problem is often all It is calculated in hours, or even days.
Although Sudoku may seem simple, it is actually very technical, because all the problem solving process of Sudoku is Resulted from logical reasoning, it has caused many Sudoku solutions. Due to the different solutions, the difficulty of understanding a problem is also very different.
Common Sudoku solutions include the following Species:
1. Intrauterine exclusion method
The exclusion method is to use Sudoku Bank, The rule that the same number cannot be filled in the column and the palace, the same number can be excluded from the same number in the same row, the same column and other figures in the same palace using the number that has appeared.
As a goal, use a certain number to exclude it, and finally get the method that only one grid appears in the palace.
2. Rows and columns excluded Law
The row and column elimination method is to target a row or column and use a certain number to eliminate it, and finally get the method in which only one cell appears in the row and column.
3. Block exclusion method
The block exclusion method is to first use the intrauterine exclusion method in a certain A block is formed in the palace, and the exclusion of this block is combined with other known numbers to determine that there is only one cell in a certain palace.
4. Number-pair placeholder method
Number-pair placeholder method refers to a certain area So that certain two numbers can only appear in certain two grids. At this time, although it is impossible to determine the position of these two numbers, you can use the placeholder of the two numbers to exclude other numbers from appearing in the two grids, and then combine the elimination method to indirectly Fill out the next number.
5. Unique remainder method
唯余The method is to use the possibility that there are only 9 types of numbers in each grid of Sudoku. If there are 8 types of numbers in a grid, you can only fill in the only method that does not appear.
In addition, there are dozens of standard solutions, and each solution has a different difficulty when observing and understanding the same Sudoku problem.
5. Conclusion
Never thought that playing a game requires not only reading the skills and solutions of various games, but also the flexibility of these solutions. The sport is in the game, and sometimes it may not be particularly easy to use!
To put it simply, this game is a bit "hardcore"!
If I say that I "suffered" in the game of Hidetaka Miyazaki, I have the urge to throw the handle. So, the author of this "Sudoku Universe" can't wait to take off my head and kick it...
Because the game is too lack of early stage Game guide, this is for Sudoku novices like the author. The game can be said to be extremely unfriendly in terms of experience.
There is also a poor operating experience after transplanting to NS. When I first came into contact with this game, it really made the author feel unable to start...
But then again, after gradually getting started with this game, you will experience a pure, unique Sudoku game Unique charm!
Of course, it's the same sentence that has already been said.
For this game, whether you think it is fun or not, depends entirely on your personal hobbies. After all, for a Sudoku game, it is still a bit too niche.
Here is Qi Jiuzu Game said, I am Ji Luofeng, an otaku uncle who loves to write and play! Looking forward to your attention and message!
