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crazy stone software wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 history 2 performance 3 notes 4 further reading 5 external links toggle the table of contents crazy stone software 3 languages deutsch français 日本語 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia go playing engine crazy stone champion go on ios and android platforms is a go playing engine developed by rémi coulom a french computer scientist it is one of the first computer go programs to utilize a modern variant of the monte carlo tree search it is part of the computer go effort in january 2012 crazy stone was rated as 5 dan on kgs in march 2014 as 6 dan 1 history edit coulom began writing crazy stone in july 2005 and at the outset incorporated the monte carlo algorithm in its design early versions were initially available to download as freeware from his website albeit no longer 2 pattern recognition and searching was added in 2006 and later that year crazy stone took part in its first tournament winning a gold medal in the 9 9 competition at the 11th computer olympiad 2 coulom subsequently entered the program into the 12th computer olympiad the following year winning bronze in the 9x9 and silver in the 19 19 competitions however crazy stone s most significant accomplishment was to defeat kaori aoba a professional japanese 4 dan in an 8 stone handicap match in 2008 in doing so the engine became the first to officially defeat an active professional in japan with a handicap of less than nine stones three months later on 12 december 2008 crazy stone defeated aoba again in a 7 stone match 3 in march 2013 crazy stone beat yoshio ishida japanese 9 dan former honinbo meijin in a 19 19 game with four handicap stones 4 on march 21 2014 at the second annual densei sen competition crazy stone defeated norimoto yoda japanese professional 9 dan in a 19 19 game with four handicap stones by a margin of 2 5 points 5 performance edit 29 05 2006 gold medal in the 9x9 tournament at the 11th computer olympiad turin 2 01 06 2006 finished 5th in the 19x19 tournament at the 11th computer olympiad turin 2 13 06 2007 bronze medal in the 9x9 tournament at the 12th computer olympiad amsterdam 2 17 06 2007 silver medal in the 19x19 tournament at the 12th computer olympiad amsterdam 2 02 12 2007 won the first computer go uec cup 6 04 09 2008 defeated kaori aoba in an 8 stone handicap match 1 14 12 2008 won the second computer go uec cup 6 14 12 2008 defeated kaori aoba in a 7 stone handicap match 1 29 11 2009 finished 9th in the third computer go uec cup 6 notes edit 1 2 3 crazy stone s profile sensei s library retrieved 2 february 2010 1 2 3 4 5 6 crazy stone s icga record archived 2014 09 06 at the wayback machine international computer games association retrieved 2 february 2010 crazy stone defeats kaori aoba rémi coulom retrieved 2 february 2010 アマ六段の力 天才かも 囲碁棋士 コンピューターに敗れる 初の公式戦 msn sankei news archived from the original on 24 march 2013 retrieved 27 march 2013 second densei sen competition retrieved 21 march 2014 1 2 3 first computer go uec cup archived 2010 10 16 at the wayback machine university of electro communications retrieved 2 february 2010 further reading edit the mystery of go the ancient game that computers still can t win wired 5 december 2014 retrieved 24 december 2014 external links edit crazy stone website 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 go and mathematics variants batoo capture go sygo go portal category retrieved from https en wikipedia org w index php title crazy_stone_ software oldid 1285579132 category go engines hidden categories articles with short description short description is different from wikidata webarchive template wayback links this page was last edited on 14 april 2025 at 14 27 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile 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