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The blood-vomiting game (Japanese: 吐血の一局, romanized: toketsu no ikkyoku) is a famous game of Go of the Edo period of Japan, played on June 27, 1835, between Hon'inbō Jōwa (white) and Akaboshi Intetsu (black). It is noted for the premature death of the go prodigy Akaboshi Intetsu who coughed up blood after the game and died a few months later. Selected moves of the game are shown in diagrams.

After continually struggling to gain the post of Meijin, Hon'inbō Jōwa had won the title over rival Inoue Gennan Inseki. The rivalry between Jōwa and Inseki began when a game scheduled between the two was cancelled. The game, scheduled for February 18, 1828, was to be played due to Inseki's recent promotion to 8 dan. The game was cancelled by Jōwa's side, who claimed that Inseki did not deserve his promotion but had gained it through intrigue. This led Inseki to attempt to remove Jōwa from his post. Failing to keep to an agreement, Jōwa refused to give up his post to Inseki after six years (1834). Inseki then sent his pupil, Akaboshi Intetsu, expected to become Meijin after Jōwa, to play Jōwa in a match. The match lasted for four days without any adjournments. Jōwa won the match, and while kneeling over the board Akaboshi coughed or vomited up blood. He died within a few months. As Akaboshi was only 25 years old at the time, it is often suggested that pre-existing gastrointestinal bleeding or pulmonary disease had weakened his health, and it is possible that Akaboshi was sick for months with these diseases already. (Full article...)

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General images

The following are images from various Go-related articles on Wikipedia.

Image 1A traditional Japanese set, with a solid wooden floor board (碁盤 goban), 2 bowls (碁笥 goke) and 361 stones (碁石 goishi) (from Go (game))
Image 2One black chain and two white chains, with their liberties marked with dots. Liberties are shared among all stones of a chain and can be counted. Here the black group has 5 liberties, while the two white chains have 4 liberties each. (from Go (game))
Image 3A simplified game at its end. Black's territory (A) + (C) and prisoners (D) is counted and compared to White's territory (B) only (no prisoners). In this example, both Black and White attempted to invade and live (C and D groups) to reduce the other's total territory. Only Black's invading group (C) was successful in living, as White's group (D) was killed with a black stone at (E). The points in the middle (F) are dame, meaning they belong to neither player. (from Go (game))
Image 4South Korean player Lee Chang-ho plays against Russian player Alexandre Dinerchtein, seven-time European Champion and one of the few non-East Asian players to reach professional status. (from Go (game))
Image 5Hon'inbō Shūsai (left), last head of house Hon'inbō, plays against then-up-and-coming Go Seigen in the game of the century. (from Go (game))
Image 6An example of single-convex stones and Go Seigen bowls. These particular stones are made of Yunzi material, and the bowls of jujube wood. (from Go (game))
Image 7Under normal rules, White cannot play at A because that point has no liberties. Under the Ing and New Zealand rules, White may play A, a suicide stone that kills itself and the two neighboring white stones, leaving an empty three-space eye. Black naturally answers by playing at A, creating two eyes to live. (from Go (game))
Image 8Stone Weiqi board from the Han dynasty, excavated from the tomb in Wangdu County, Hubei province. (from History of Go)
Image 9A ceramic 19 x 19 board preserved from the Sui dynasty. (from History of Go)
Image 10Minamoto no Yoshiie by Tsukioka Yoshitoshi, 1886. This popular woodblock print depicts the ancient legend of a husband who suspected his wife was having an affair with the samurai Minamoto no Yoshiie. To prevent his visits, the husband surrounded his house with brambles and placed a Go board on the balcony, hoping he would stumble over it. Instead, the samurai deftly cut the board as he leaped over the balcony railing, avoiding both obstacles. (from Go (game))
Image 11Three Japanese professional Go players observe some younger amateurs as they dissect a life and death problem in the corner of the board, at the US Go Congress in Houston, Texas, 2003. (from Go (game))
Image 12Example of seki (mutual life). Neither Black nor White can play on the marked points without reducing their own liberties for those groups to one (self-atari). (from Go (game))
Image 13Lee Sedol at an LG tournament (from History of Go)
Image 14Yu Lan (1742–1809), "Playing Go Against Herself" (from his Album of Ladies' Elegant Amusements) (from History of Go)
Image 15The illustration [A] displays the four "liberties" (adjacent empty points) of a single black stone. Illustrations [B], [C], and [D] show White reducing those liberties progressively by one. In [D], when Black has only one liberty left, that stone is under attack and about to be captured and eliminated (a state called atari). White may capture that stone (remove it from the board) with a play on its last liberty (at D-1). (from Go (game))
Image 16Hon'inbō Dōsaku, the strategist "Go Saint" who was at the forefront of modern Go theory. (from History of Go)
Image 17Go Seigen and Kitani Minoru playing (from History of Go)
Image 18According to John Fairbairn (In the Go World Feature "Go in Tibet"), at least one version of Tibetan Go was played on a 17x17 board and began with this fixed stone placement. (from History of Go)
Image 19Nie Weiping depicted on a Beijing subway (from History of Go)
Image 20Michael Redmond in 2018 (from History of Go)
Image 21Traditional Sunjang baduk starting position (from History of Go)
Image 22Korean women playing baduk in 1904 (from History of Go)
Image 23Painting of a woman playing Go, from the Astana Graves. Tang dynasty, c. 744 CE. (from Go (game))
Image 24Japanese women in traditional kimonos playing go, a print from the 18th century. (from History of Go)
Image 25Shūsaku (from History of Go)
Image 26A simplified ko fight on a 9×9 board. The ko is at the point marked with a square—Black has "taken the ko" first. The ko fight determines the life of the A and B groups—only one survives and the other is captured. White may play C as a ko threat, and Black properly answers at D. White can then take the ko by playing at the square-marked point (capturing the one black stone). E is a possible ko threat for Black. (from Go (game))
Image 27Go players demonstrating the traditional technique of holding a stone (from Go (game))
Image 28Hon'inbō Shūsai (from History of Go)
Image 29Baekje Baduk board, Seoul Baekje Museum, Seoul, Korea. (from History of Go)
Image 30A finished beginner's game on a 13×13 board (from Go (game))
Image 31Li Jing playing Go with his brothers. Detail from a painting by Zhou Wenju (fl. 942–961 CE), Southern Tang dynasty. (from Go (game))
Image 32The famous "ear reddening move" of Shusaku (black plays the center), which reportedly made Inseki Gennan's ear turn red. (from History of Go)
Image 33Weiqi at the Ming imperial court, 16th century (from History of Go)
Image 34Go portrayed as part of East-Asian culture. (The goblet in the middle is from the Nihon Ki-in.) (from Go (game))
Image 35The first 150 moves of a Go game animated. (Click on the board to restart the animation in a larger window.) (from Go (game))
Image 36Standard fixed stone setup for playing Ancient Chinese Weiqi (Go). (from History of Go)
Image 37Outfit for the Go Game, Polychrome woodblock print (surimono), C. 19th century, MET. (from History of Go)
Image 38Decommissioned AlphaGo backend rack (from History of Go)
Image 39Model of a 19×19 Go board, from a tomb of the Sui dynasty (581–618 CE) (from Go (game))
Image 40Katsushika Ōi's (1800–1866) Operating on Guan Yu's Arm, color on silk. (from History of Go)
Image 41Li Jing playing Go with his brothers. Painting by Zhou Wenju (fl. 942–961), Southern Tang dynasty. (from History of Go)
Image 42A 2006 Go tournament in Paris. (from History of Go)
Image 43The Black stone group has only one liberty (at point A), so it is very vulnerable to capture. If Black plays at A, the chain would then have 3 liberties, and so is much safer. However, if White plays at A first, the Black chain loses its last liberty, and thus it is captured and immediately removed from the board, leaving White's stones as shown to the right. (from Go (game))
Image 44New York Institute of Go (from History of Go)
Image 45Sakata in 1955 (from History of Go)
Image 46Go stones from the Tang and Song Dynasties. (from History of Go)
Image 47Katago visual computer analysis of a game (from History of Go)
Image 48The opening section of the Dunhuang Go Manual (British Library) (from History of Go)
Image 49A 9×9 game with graphical aids. Colors and markings show evaluations by the computer assistant. (from Go (game))
Image 50Hon'inbō Sansa (1559–1623), a Nichiren Buddhist priest, was one of the strongest Japanese Go players of the Edo period and the founder Hon'inbō school of Go. (from History of Go)
Image 51Game record of the Game of the Century, Go Seigen (black) vs Shūsai (white). (from History of Go)

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Top international title holders

Rank	Player	Association	Titles
1	Lee Changho	South Korea	17
2	Lee Sedol	South Korea	14
3	Cho Hunhyun	South Korea	9
4	Gu Li	China	8
	Ke Jie	China
	Shin Jinseo	South Korea
7	Yoo Changhyuk	South Korea	6
8	Park Junghwan	South Korea	5
9	Chang Hao	China	3
	Kong Jie	China
	Tang Weixing	China
	Chen Yaoye	China
	Ding Hao	China

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v t e Go
Overview	Handicaps Komi Rules
Equipment	Bowls Goban Katsura Kaya Stones Clamshell Slate Yunzi
Terms	Aji Atari Board positions Dame Divine move Double hane Eyes Gote, sente and tenuki Hane Hayago Jigo Joseki Kakari Keima Kiai Kikashi Ko Komi Korigatachi Kosumi Ladder Liberty Miai Monkey jump Moyo Myoushu Nakade Nerai Myoushu Peep Pincer Probe Sabaki Seki Sente Shape Shoulder hit Tesuji Thickness Yose
Strategy and tactics	Capturing race Fuseki Chinese Kobayashi Shinfuseki Shusaku Jōseki Nadare Taisha Ko fight Ladder Life and death Mirror Go Opening theory Proverbs Shape Empty triangle Ponnuki Tenuki Tsumego
History	Classic of Arts Dunhuang Go Manual Emperor Yao Four Go houses Four arts Hoensha 9 Pin Zhi Oskar Korschelt Oshirogo Players European players Female players Nihon Ki-in Hall of Fame Professional handicaps
Competition	Go professional Ranks and ratings Dan Kyū Honorary titles Jubango Tournaments World champions
Games and matches	AlphaGo vs. Fan Hui AlphaGo vs. Ke Jie AlphaGo vs. Lee Sedol Atomic bomb game Blood-vomiting game Ear-reddening game The Game of the Century Kamakura jubango Lee's broken ladder game
Art and media	AlphaGo The Divine Move The Girl Who Played Go The Go Master The Go Player Go World Hikaru no Go Igo Hatsuyōron Long Ode to Watching Weiqi The MANIAC The Master of Go Ranka Sensei's Library Shibumi The Surrounding Game The Weiqi Devil
Computers	Computer Go UEC Cup Engines AlphaGo AlphaGo Master AlphaGo Zero AlphaZero Crazy Stone Darkforest Fine Art GNU Go KataGo Leela Leela Zero Zen Future of Go Summit Monte Carlo tree search Smart Game Format Servers KGS Go Server Pandanet Tygem
Organizations	American Go Association Australian Go Association British Go Association China China Qiyuan Chinese Weiqi Association Hong Kong Go Association European Go Federation French Federation of Go International Go Federation Irish Go Association Japan All Japan Student Go Federation Kansai Ki-in Nihon Ki-in Korea Korea Baduk Association Myongji University Mind Sports Organisation New Zealand Go Society Singapore Weiqi Association Taiwan Chi Yuan Culture Foundation
Other	Benson's algorithm Game record (kifu) Games played with Go equipment Go and mathematics Variants Batoo Capture go Sygo
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