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Go Ranks And Ratings
There are various systems of Go ranks and ratings that measure the skill in the traditional board game Go. Traditionally, Go rankings have been measured using a system of dan and kyu ranks. Especially in amateur play, these ranks facilitate the handicapping system, with a difference of one rank roughly corresponding to one free move at the beginning of the game. This system is also commonly used in many East Asian martial arts, where it often corresponds with a belt color. With the ready availability of calculators and computers, rating systems have been introduced. In such systems, a rating is rigorously calculated on the basis of game results. Kyu and dan ranks Traditionally, the level of players has been defined using ''kyu'' and ''dan'' ranks. Kyu ranks are considered ''student'' ranks. Dan ranks are considered ''master'' ranks. Beginners who have just learned the rules of the game are usually around 30th kyu. As they progress, they advance numerically downwards throug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Go (board Game)
# Go is an abstract strategy game, abstract strategy board game for two players in which the aim is to fence off more territory than the opponent. The game was invented in China more than 2,500 years ago and is believed to be the oldest board game continuously played to the present day. A 2016 survey by the International Go Federation's 75 member nations found that there are over 46 million people worldwide who know how to play Go, and over 20 million current players, the majority of whom live in East Asia. The Game piece (board game), playing pieces are called ''Go equipment#Stones, stones''. One player uses the white stones and the other black stones. The players take turns placing their stones on the vacant intersections (''points'') on the #Boards, board. Once placed, stones may not be moved, but ''captured stones'' are immediately removed from the board. A single stone (or connected group of stones) is ''captured'' when surrounded by the opponent's stones on all Orthogona ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Classic Of Arts
The ''Classic of Arts'' () was a 3rd-century Chinese book written by Handan Chun on the various cultivated arts of ancient China. The book also briefly discussed some basics of the game of Go, and it was the first to state the 9 Pin Zhi, a system for Go ranks and ratings. See also * International Go Federation The International Go Federation (IGF) is an international organization that connects the various national Go federations around the world. Role The role of the IGF is to promote the sport of Go throughout the world, promote amicable relations ... Notes External linksGo in ancient Chinaby John Fairbairn Go books Chinese literature {{go-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maximum Likelihood Estimation
In statistics, maximum likelihood estimation (MLE) is a method of estimation theory, estimating the Statistical parameter, parameters of an assumed probability distribution, given some observed data. This is achieved by Mathematical optimization, maximizing a likelihood function so that, under the assumed statistical model, the Realization (probability), observed data is most probable. The point estimate, point in the parameter space that maximizes the likelihood function is called the maximum likelihood estimate. The logic of maximum likelihood is both intuitive and flexible, and as such the method has become a dominant means of statistical inference. If the likelihood function is Differentiable function, differentiable, the derivative test for finding maxima can be applied. In some cases, the first-order conditions of the likelihood function can be solved analytically; for instance, the ordinary least squares estimator for a linear regression model maximizes the likelihood when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Go Federation
The European Go Federation (EGF) is a non-profit organization with the purpose of encouraging, regulating, co-ordinating, and disseminating the playing of the board game Go in Europe. The EGF was founded in 1957, the same year that the inaugural European Go Congress (EGC) took place in Cuxhaven, Germany. The Congress has been an annual event every year since then, held each time in a different European city. The European Go Championship takes place during the EGC, as well as the Annual General Meeting (AGM). In 2014, the European Professional System was established by the European Go Federation. Membership is open to any Go-organising association in a country in or near Europe. There are currently 35 full members, and two suspended members. Function The EGF elects an Executive Committee which supervises a number of commissions in charge of normal activities in between the AGMs. Major European tournaments do not fall under the Executive Committee's supervision, but are dire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glicko Rating System
The Glicko rating system and Glicko-2 rating system are methods of assessing a player's strength in zero-sum two-player games. The Glicko rating system was invented by Mark Glickman in 1995 as an improvement on the Elo rating system and initially intended for the primary use as a chess rating system. Glickman's principal contribution to measurement is "ratings reliability", called RD, for ''ratings deviation''. Overview Mark Glickman created the Glicko rating system in 1995 as an improvement on the Elo rating system. Both the Glicko and Glicko-2 rating systems are under public domain and have been implemented on game servers online like '' Counter-Strike: Global Offensive,'' ''Team Fortress 2'','' Dota 2'', ''Guild Wars 2'', '' Splatoon 2'', Online-go.com, Lichess Lichess (; ) is a free and open-source software, free and open-source Internet chess server run by a Nonprofit organization, non-profit organization of the same name. Users of the site can play online chess an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elo Rating
The Elo rating system is a method for calculating the relative skill levels of players in zero-sum games such as chess or esports. It is named after its creator Arpad Elo, a Hungarian-American chess master and physics professor. The Elo system was invented as an improved Chess rating system, chess-rating system over the previously used Harkness rating system, Harkness system, but is also used as a rating system in association football, association football (soccer), American football, baseball, basketball, pool (cue sports), pool, various board games and esports, and, more recently, Large language model, large language models. The difference in the ratings between two players serves as a predictor of the outcome of a match. Two players with equal ratings who play against each other are expected to score an equal number of wins. A player whose rating is 100 points greater than their opponent's is expected to score 64%; if the difference is 200 points, then the expected score for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Go Professional
A Go professional is a professional player of the game of Go. The minimum standard to acquire a professional diploma through one of the major Go organisations is very high. The competition is tremendous, and prize incentives for champion players are very large. For example, the Honinbo Tournament has a grand prize of about $350,000. Almost all professional players are from China, Japan, South Korea, and Taiwan. This is because until recently, only China ( China Qiyuan), Japan (Nihon Ki-in, Kansai Ki-in), South Korea ( Korea Baduk Association (Hanguk Gi-Won)), and Taiwan (Taiwan Chi Yuan Culture Foundation) had professional Go organizations. In 2012, the AGA Professional System was established in the United States. In 2014, the EGF professional system was established in Europe. Professional rankings are separate from the amateur ratings (usually ''30-kyu'' through ''7-dan''). Professional rankings are ''1-dan'' through ''9-dan'' (sometimes written ''1p'' through ''9p''). I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after India, representing 17.4% of the world population. China spans the equivalent of five time zones and Borders of China, borders fourteen countries by land across an area of nearly , making it the list of countries and dependencies by area, third-largest country by land area. The country is divided into 33 Province-level divisions of China, province-level divisions: 22 provinces of China, provinces, 5 autonomous regions of China, autonomous regions, 4 direct-administered municipalities of China, municipalities, and 2 semi-autonomous special administrative regions. Beijing is the country's capital, while Shanghai is List of cities in China by population, its most populous city by urban area and largest financial center. Considered one of six ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nine-rank System
The nine-rank system, also known as the nine-grade controller system, was used to categorize and classify government officials by rank in Imperial China. Their accorded rank signified their status in the government hierarchy and the amount of wages they earned. Created by the politician Chen Qun in the state of Cao Wei during the Three Kingdoms, it was used until the Song dynasty, and similar ranking systems were also present in the Ming dynasty and Qing dynasty. A similar system was also used in Korea. In Japan, the Twelve Level Cap and Rank System was adopted in 603 during the reign of Empress Suiko. History Background Prior to the nine-rank system, official positions were denoted by their salary paid in number of bushels of grain. For example, during the Han dynasty, the highest-ranking officials were classed as ''wandan'' (萬石), meaning ten thousand bushels, and were paid 350 bushels of grain per month. The lowest ranking petty subofficials were paid in pecks, worth le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea in the south. The Japanese archipelago consists of four major islands—Hokkaido, Honshu, Shikoku, and Kyushu—and List of islands of Japan, thousands of smaller islands, covering . Japan has a population of over 123 million as of 2025, making it the List of countries and dependencies by population, eleventh-most populous country. The capital of Japan and List of cities in Japan, its largest city is Tokyo; the Greater Tokyo Area is the List of largest cities, largest metropolitan area in the world, with more than 37 million inhabitants as of 2024. Japan is divided into 47 Prefectures of Japan, administrative prefectures and List of regions of Japan, eight traditional regions. About three-quarters of Geography of Japan, the countr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
9 Pin Zhi
9 Pin Zhi ( Chinese: 九 品 制) was an ancient Chinese ranking system for the game of Go, which first appeared in the 3rd century book ''Classic of Arts'' by Handan Chun. He ranks 9 different Pin (levels) for Go players, from strong to weak: 夫围棋之品有九：There are 9 levels in go: * 一曰入神 – 1 pin Being in the Spirit * 二曰坐照 – 2 pin Seated in Enlightenment * 三曰具体 – 3 pin Concreteness * 四曰通幽 – 4 pin Understanding changes * 五曰用智 – 5 pin Applying Wisdom * 六曰小巧 – 6 pin Ability * 七曰斗力 – 7 pin Fighting Strength * 八曰若愚 – 8 pin Being Quite Inept * 九曰守拙 – 9 pin Being Truly Stupid 九品之外，今不复云。 This system is loosely based on the Nine-rank system The nine-rank system, also known as the nine-grade controller system, was used to categorize and classify government officials by rank in Imperial China. Their accorded rank signified their status in the government hierarchy and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dan Rank
The ranking system is used by many Japanese, Okinawan, Korean, and other martial arts organizations to indicate the level of a person's ability within a given system. Used as a ranking system to quantify skill level in a specific domain, it was originally used at a Go school during the Edo period. It is now also used in most modern Japanese fine and martial arts. Martial arts writer Takao Nakaya claims that this dan system was first applied to martial arts in Japan by Kanō Jigorō (1860–1938), the founder of judo, in 1883, and later introduced to other East Asian countries. In modern Japanese martial arts, holders of dan ranks often wear a black belt; those of higher rank may also wear either red-and-white or red belts depending on the style. Dan ranks are also given for strategic board games such as Go, Japanese chess ('' shōgi''), and renju, as well as for other arts such as the tea ceremony (''sadō'' or ''chadō''), flower arrangement (''ikebana''), Japanese call ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
