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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 through ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Go (board Game)
Go is an abstract strategy board game for two players in which the aim is to surround 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 playing pieces are called stones. One player uses the white stones and the other, black. The players take turns placing the stones on the vacant intersections (''points'') of a board. Once placed on the board, stones may not be moved, but stones are removed from the board if the stone (or group of stones) is surrounded by opposing stones on all orthogonally adjacent points, in which case the stone or group is ''captured''. The game proceeds until neither player wishes to make another move. When ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans Japanese archipelago, an archipelago of List of islands of Japan, 6852 islands covering ; the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa Island, Okinawa. Tokyo is the Capital of Japan, nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto. Japan is the List of countries and dependencies by population, eleventh most populous country in the world, as well as one of the List of countries and dependencies by population density, most densely populated and Urbanization by country, urbanized. About three-fourths of Geography of Japan, the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tournament
A tournament is a competition involving at least three competitors, all participating in a sport or game. More specifically, the term may be used in either of two overlapping senses: # One or more competitions held at a single venue and concentrated into a relatively short time interval. # A competition involving a number of matches, each involving a subset of the competitors, with the overall tournament winner determined based on the combined results of these individual matches. These are common in those sports and games where each match must involve a small number of competitors: often precisely two, as in most team sports, racket sports and combat sports, many card games and board games, and many forms of competitive debating. Such tournaments allow large numbers to compete against each other in spite of the restriction on numbers in a single match. These two senses are distinct. All golf tournaments meet the first definition, but while match play tournaments meet the sec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maximum Likelihood Estimation
In statistics, maximum likelihood estimation (MLE) is a method of estimating the parameters of an assumed probability distribution, given some observed data. This is achieved by maximizing a likelihood function so that, under the assumed statistical model, the observed data is most probable. The 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, 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 all observed outcomes are assumed to have Normal distributions with the same variance. From the perspective of Bayesian inference ... [...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 direct ... [...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 games of skill, such as chess and Go. 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 Pokémon Showdown, Pokémon Go, Lichess, Free Internet Chess Server, Chess.com, Online Go Server (OGS), Counter Strike: Global Offensive, Quake Live, Team Fortress 2, Dota Underlords, Guild Wars 2, Splatoon 2, Dominion Online, TETR.IO, and competitive programming competitions. The Reliability Deviation (RD) measures the accur ... [...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. It is named after its creator Arpad Elo, a Hungarian-American physics professor. The Elo system was invented as an improved chess-rating system over the previously used Harkness system, but is also used as a rating system in association football, American football, baseball, basketball, pool, table tennis, and various board games and esports. 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 the stronger player is 76%. A player's Elo rating is represented by a number which may change depending on the outcome of rated games played. After every game, the winn ... [...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''). In t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Go Handicaps
Within most systems and at most levels in the game of Go, a handicap is given to offset the strength difference between players of different ranks. Forms of handicaps In the game of Go, a handicap is given by means of stones and compensation points. In contrast to an even game, in which Black plays first, White plays the first move in a game with handicap (after Black's handicap stones have been placed). Handicap stones The rank difference within a given amateur ranking system is one guide to how many handicap stones should be given to make the game a more equal contest. As a general rule, each rank represents the value of one stone. (In terms of points, one stone is considered to be 13-16 points, but this figure is not constant over levels: the more skillful a player, the greater the usefulness of each stone.) For example, a 3 ''kyu'' player gives a 7 ''kyu'' player four handicap stones to allow for an interesting game with roughly equal challenge for both players. If tradi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or ... [...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 in Imperial China. Created 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. 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 less than 100 bushels per year. 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 The Nine-rank system was a reorganization of the Han dynasty practice of recommending noteworthy locals for polit ... [...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] |
