ASIAdocument.write(“” + m[today.getMonth()+1]+ ” “+ today.getDate()+”, ” + theYear + ” “);HOMECHINAWORLDBUSINESSLIFESTYLECULTURETRAVELSPORTSOPINIONREGIONALFORUMNEWSPAPERChina Daily PDFChina Daily E-paperChina Daily Global PDFChina Daily Global E-paperWorld / Asia-PacificAsia PacificUS & CanadaLatin AmericaEuropeAfricaMiddle EastReporters JournalAlphaGo defeats Lee Sedol 4-1 in historic Go match(Xinhua) Updated:2016-03-15 17:36Comments Print Mail Large Medium SmallThe worlds top Go player Lee Sedol (R) puts his first stone during the last match of the Google DeepMind Challenge Match against Googles artificial intelligence program AlphaGo in Seoul, South Korea, in this handout picture provided by Google and released by Yonhap on March 15, 2016.[Photo/Agencies]SEOUL — Googles Go-playing computer program AlphaGo on Tuesday ended a historic match of the ancient Chinese board game with Go grandmaster Lee Sedol of South Korea by taking a 4-1 lead with its fourth victory in the final match of the best-of-five series.
The final winner was already determined before Tuesdays encounter as Lee lost the first three games of the five-game match. AlphaGo got 1 million U.S. dollars in prize, which will be donated to charities.
The human Go champion beat the artificial intelligence (AI), developed by Googles London-based AI subsidiary DeepMind, in the fourth match, but Lee was defeated once again in the final match.
Despite the sweeping victory, it is too early to say that AI has surpassed humans in Go because Lee fought AlphaGo with little knowledge about the computer program, including a playing style and a strategy, one commentator said.
Only after analyzing AlphaGos strategy sufficiently and holding a match once again between the AI and human Go players, can it be determined whether machines may surpass humans in the board game, the commentator said.
Lee and AlphaGo exchanged 280 moves for five hours, the longest among the five games that kicked off last Wednesday in Seoul. Lee displayed a fighting spirit to the last minute, but he eventually lost by a narrow margin.
The 33-year-old kept a tight game with the two-year-old computer program by the middle of the match, but a decisive moment came past halfway as AlphaGo succeeded in attacking the lower-left side.
At the lower-left side, AlphaGo made questionable moves, which looked like blunders at the first sight, but those also proved to be a strategy to win more territory in hindsight.
Commentators said AlphaGo made excellent moves in the latter half of the game, proving its better capability to play as time goes on. Lee didnt make any big missteps during the game, experts said.
About four and a half hours into the match, AlphaGo had been subject to the one-minute countdown for the first time as the Go-playing AI consumed all of the given two-hour time limit.
AlphaGo made a very rapid decision on moves, in which human Go players tend to take very long, but the computer program took a long time to make moves that humans think of as easy to determine, according to commentators.
Playing black, Lee put his first two stones right beside flower spots in the right side, while AlphaGo placed its first two white stones in flowers in the left side.
After his first win on Sunday, Lee offered to play black stones, with which he believed AlphaGo displayed a relatively weak play.
About two and a half hours into the match, a tight game continued. AlphaGo attacked the right center by seeking to build a large territory there, while Lee built a territory in the lower-right side of the board according to his strategy which reportedly occupies more areas in an early phase.
In the fourth match where Lee won his first victory after three straight losses, AlphaGo made bad moves after Lee began to dominate in building a territory.
Lees first victory over AlphaGo indicated that AI hasnt surpassed humans completely in Go, which had been regarded as the last game humans can dominate over machines due to its complex, intuitive and creative nature.
AlphaGo boasts of a deep learning capability to learn for itself and discover new strategies by playing games against itself and adjusting neural networks based on a trial-and-error process known as reinforcement learning.
Lee is regarded as one of the greatest Go players in the world as he won 18 world championships for 21 years of his professional career. He recorded a winning rate of about 70 percent with 47 victories in professional matches.
Go, known as Weiqi in China and Baduk in South Korea, originated from China thousands of years ago. It involves two players who take turns putting white and black stones on a grid of 19 lines by 19 lines. One can win an opponent when gaining more territory on the grid. One can remove stones of the opponent by surrounding the pieces.8.03KRelated StoriesLee Sedol defeats AlphaGo for 1st time in 4th Go matchAlphaGo takes 3-0 lead in historic match with Lee SedolAlphaGo beats Lee Sedol in 2nd matchHuman vs AlphaGoAlphaGo beats Lee Sedol to lead 1-0 in Go-chess showdownPhotoUNs top environmental honors go to three in ChinaGerman trains collide near Duesseldorf, several people injuredLiu heralds UK partnership in education and researchEfforts needed for sustainable projects1st Panda cub born in France named Yuan MengFree trade studies agreed on as Li meets with Canadian PM TrudeauChina-JapanChina-USChina-AfricaChina-EuropeLi tells Japanese business leaders its time for bilateral cooperationChina-Japan meet seeks cooperationGroup of lawmakers visit notorious Yasukuni Shrine in JapanJapan can offer experience, expat saysChina-Japan ties seen at dialogue as benefit to regionChina, Japan officials exchange views on security issues at 15th dialogueChinese music finds new foothold in United StatesC919 flies toward air worthinessPolitical leaders: Sino-US relations to growChina vows steps after US launches probe into aluminum tradeGates is added to top-tier Chinese academyYao helps AB InBev fight alcohol abuseAction urged over pollutionUNs top environmental honors go to three in ChinaChina unveils Model Confucius Institute edifice in Ghana universityChina vows to deepen bilateral ties with new Zimbabwe govtChinese, African parties meet to share wisdom on modernization2nd China-Africa Investment Forum begins in MoroccoLiu heralds UK partnership in education and researchPeak performance by Chinese nurse on Scotlands mountains9-month festival of Chinese art, heritage to be staged in Liverpool, UK, next yearChina eyes closer economic, trade cooperation with BelarusPremier calls to enhance trade liberalization and facilitation in SCOPremier: China to advance production capacity with UzbekistanAsia PacificUS & CanadaEuropeAfricaMiddle EastChinese tourists go to South KoreaChina-Japan meet seeks cooperationUN envoys trip to DPRK praised by BeijingBelt and Road a great opportunity: Uzbek officialKwaussie wins Australias word of the yearJapan can offer experience, expat saysTrudeau visits Sina WeiboChina, Canada agree to issue joint statement on climate changeDemocrats stand united against GOP tax billUS quits talks on global migration pactTensions triggered over possible moveSino-Canadian bilateral trade ties to deepen furtherMay gets little gasp as EU extends deadline for sufficient progress in Brexit talksRussia banned from Pyeongchang Winter OlympicsGerman trains collide near Duesseldorf, several people injuredLiu heralds UK partnership in education and researchBoth first ladies name panda cub Yuan MengLiu Yandong heralds bilateral cooperation in education and researchEthiopian FM urges strengthened Ethiopia-China tiesUNs top environmental honors go to three in ChinaAction urged over pollutionBelt and Road Initiative to help countries achieve UN goals: officialChina unveils Model Confucius Institute edifice in Ghana universityMorocco king holds historic talks with South African president in AbidjanYemens ex-president Saleh, relatives killed by HouthisTrump recognition of Jerusalem as Israeli capital would raise regional tensionsYemen rattled by raids as clashes spreadSquash a perfect match for girl refugees in JordanSyrian talks in Geneva to continue to Dec 15: UN envoyAll parties in Syria urged to join talksMost PopularHot TopicsThe world in photos: March 7 – March 13Myanmar electionChina and JapanDPRKSyrias refugee crisisGreek debt crisisSouth China SeaMH370Iran nuclear talksMERS virusReporters JournalChina raises a glass to single malt Scotch, a whisky that is now an investmentInternational Womens Day ties gender pay gap to educationDiplomatic progress comes one-on-one person at a timeHighlightsJohn Kerry visits ChinaXi visits Saudi Arabia, Egypt and IranXi-style diplomacy in 2015…| About China Daily | Advertise on Site | Contact Us | Job Offer | Expat Employment |Copyright 1995 -var oTime = new Date();
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