AlphaGo versus Lee Sedol

AlphaGo versus Lee Sedol, also known as the Google DeepMind Challenge Match, was a five-game Go match between 18-time world champion Lee Sedol and AlphaGo, a computer Go program developed by Google DeepMind, played in Seoul, South Korea between 9 and 15 March 2016. AlphaGo won all but the fourth game;[1] all games were won by resignation.[2] The match has been compared with the historic chess match between Deep Blue and Garry Kasparov in 1997.

AlphaGo versus Lee Sedol
4–1
Seoul, South Korea, 9–15 March 2016
Game oneAlphaGo W+R
Game twoAlphaGo B+R
Game threeAlphaGo W+R
Game fourLee Sedol W+R
Game fiveAlphaGo W+R

The winner of the match was slated to win $1 million. Since AlphaGo won, Google DeepMind stated that the prize will be donated to charities, including UNICEF, and Go organisations.[3] Lee received $170,000 ($150,000 for participating in the five games and an additional $20,000 for winning one game).[4]

After the match, The Korea Baduk Association awarded AlphaGo the highest Go grandmaster rank – an "honorary 9 dan". It was given in recognition of AlphaGo's "sincere efforts" to master Go.[5] This match was chosen by Science as one of the Breakthrough of the Year runners-up on 22 December 2016.[6]

Background

Difficult challenge in artificial intelligence
Main article: Computer Go
External video
Machine trains self to beat humans at world's hardest game, Retro Report, 2:51, Retro Report[7]

Go is a complex board game that requires intuition, creative and strategic thinking.[8][9] It has long been considered a difficult challenge in the field of artificial intelligence (AI) and is considerably more difficult[10] to solve than chess. Many in the field of artificial intelligence consider Go to require more elements that mimic human thought than chess.[11] Mathematician I. J. Good wrote in 1965:[12]

Go on a computer? – In order to programme a computer to play a reasonable game of Go, rather than merely a legal game – it is necessary to formalise the principles of good strategy, or to design a learning programme. The principles are more qualitative and mysterious than in chess, and depend more on judgment. So I think it will be even more difficult to programme a computer to play a reasonable game of Go than of chess.

Prior to 2015,[13] the best Go programs only managed to reach amateur dan level.[14] On the small 9×9 board, the computer fared better, and some programs managed to win a fraction of their 9×9 games against professional players. Prior to AlphaGo, some researchers had claimed that computers would never defeat top humans at Go.[15] Elon Musk, an early investor of Deepmind, said in 2016 that experts in the field thought AI was 10 years away from achieving a victory against a Go top professional player.[16]

The match AlphaGo versus Lee Sedol is comparable to the 1997 chess match when Gary Kasparov lost to IBM computer Deep Blue. Kasparov's loss to Deep Blue is considered the moment a computer became better than humans at chess.[17]

AlphaGo is significantly different from previous AI efforts. Instead of using probability algorithms hard-coded by human programmers, AlphaGo audits probabilities using neural networks and cognitive maps of blockchains to solve problems. AlphaGo accesses and analyses the entire online library of Go; including all matches, players, analytics, and literature; as well as games played by AlphaGo against itself and other players. Once setup, AlphaGo is independent of the developer team and evaluates the best pathway to solving Go (i.e. winning the game). By using neural networks and Monte Carlo tree search, AlphaGo calculates colossal numbers of likely and unlikely probabilities many moves into the future.

Related research results are being applied to fields such as cognitive science, pattern recognition and machine learning.[18]

Match against Fan Hui
Main article: AlphaGo versus Fan Hui
Fan Hui vs AlphaGo – Game 5

AlphaGo defeated European champion Fan Hui, a 2 dan professional, 5–0 in October 2015, the first time an AI had beaten a human professional player at the game on a full-sized board without a handicap.[19][20] Some commentators stressed the gulf between Fan and Lee, who is ranked 9 dan professional.[21] Computer programs Zen and Crazy Stone have previously defeated human players ranked 9 dan professional with handicaps of four or five stones.[22][23] Canadian AI specialist Jonathan Schaeffer, commenting after the win against Fan, compared AlphaGo with a "child prodigy" that lacked experience, and considered, "the real achievement will be when the program plays a player in the true top echelon." He then believed that Lee would win the match in March 2016.[20] Hajin Lee, a professional Go player and the International Go Federation's secretary-general, commented that she was "very excited" at the prospect of an AI challenging Lee, and thought the two players had an equal chance of winning.[20]

In the aftermath of his match against AlphaGo, Fan Hui noted that the game had taught him to be a better player, and to see things he had not previously seen. By March 2016, Wired reported that his ranking had risen from 633 in the world to around 300.[24]

Preparation

Go experts found errors in AlphaGo's play against Fan, in particular relating to a lack of awareness of the entire board. Before the game against Lee, it was unknown how much the program had improved its game since its October match.[21][25] AlphaGo's original training dataset started with games of strong amateur players from internet Go servers, after which AlphaGo trained by playing against itself for tens of millions of games.[26][27]

Players

AlphaGo
Main article: AlphaGo
AlphaGo logo

AlphaGo is a computer program developed by Google DeepMind to play the board game Go. AlphaGo's algorithm uses a combination of machine learning and tree search techniques, combined with extensive training, both from human and computer play. The system's neural networks were initially bootstrapped from human game-play expertise. AlphaGo was initially trained to mimic human play by attempting to match the moves of expert players from recorded historical games, using a KGS Go Server database of around 30 million moves from 160,000 games by KGS 6 to 9 dan human players.[13][28] Once it had reached a certain degree of proficiency, it was trained further by being set to play large numbers of games against other instances of itself, using reinforcement learning to improve its play.[29] The system does not use a "database" of moves to play. As one of the creators of AlphaGo explained:[30]

Although we have programmed this machine to play, we have no idea what moves it will come up with. Its moves are an emergent phenomenon from the training. We just create the data sets and the training algorithms. But the moves it then comes up with are out of our hands—and much better than we, as Go players, could come up with.

In the match against Lee, AlphaGo used about the same computing power as it had in the match against Fan Hui,[31] where it used 1,202 CPUs and 176 GPUs.[13] The Economist reported that it used 1,920 CPUs and 280 GPUs.[32] Google has also stated that its proprietary tensor processing units were used in the match against Lee Sedol.[33]

Lee Sedol
Main article: Lee Sedol
Lee Sedol in 2012

Lee Sedol is a professional Go player of 9 dan rank[34] and is one of the strongest players in the history of Go. He started his career in 1996 (promoted to professional dan rank at the age of 12), winning 18 world championships since then.[35] He is a "national hero" in his native South Korea, known for his unconventional and creative play.[36] Lee Sedol initially predicted he would defeat AlphaGo in a "landslide".[36] Some weeks before the match he won the Korean Myungin title, a major championship.[37]

Games

The match was a five-game match with one million US dollars as the grand prize,[3] using Chinese rules with a 7.5-point komi.[4] For each game there was a two-hour set time limit for each player followed by three 60-second byo-yomi overtime periods.[4] Each game started at 13:00 KST (04:00 GMT).[38]

The match was played at the Four Seasons Hotel in Seoul, South Korea in March 2016 and was video-streamed live with commentary by Michael Redmond (9-dan professional) and Chris Garlock.[39][40][41] Aja Huang, a DeepMind team member and amateur 6-dan Go player, placed stones on the Go board for AlphaGo, which ran through the Google Cloud Platform with its server located in the United States.[42]

Summary
Game Date Black White Result Moves
19 March 2016Lee SedolAlphaGoLee Sedol resigned186 Game 1
210 March 2016AlphaGoLee SedolLee Sedol resigned211 Game 2
312 March 2016Lee SedolAlphaGoLee Sedol resigned176 Game 3
413 March 2016AlphaGoLee SedolAlphaGo resigned180 Game 4
515 March 2016Lee Sedol[note 1]AlphaGoLee Sedol resigned280 Game 5
Result:
AlphaGo 4 – 1 Lee Sedol
^ note 1: For Game Five, under the official rules, it was intended that the colour assignments would be done at random.[43] However, during the press conference after the fourth match, Lee requested "... since I won with white, I really do hope that in the fifth match I could win with black because winning with black is much more valuable."[44] Hassabis agreed to allow Sedol to play with black.

Game 1

AlphaGo (white) won the first game. Lee appeared to be in control throughout much of the match, but AlphaGo gained the advantage in the final 20 minutes and Lee resigned.[45] Lee stated afterwards that he had made a critical error at the beginning of the match; he said that the computer's strategy in the early part of the game was "excellent" and that the AI had made one unusual move that no human Go player would have made.[45] David Ormerod, commenting on the game at Go Game Guru, described Lee's seventh stone as "a strange move to test AlphaGo's strength in the opening", characterising the move as a mistake and AlphaGo's response as "accurate and efficient". He described AlphaGo's position as favourable in the first part of the game, considering that Lee started to come back with move 81, before making "questionable" moves at 119 and 123, followed by a "losing" move at 129.[46] Professional Go player Cho Hanseung commented that AlphaGo's game had greatly improved from when it beat Fan Hui in October 2015.[46] Michael Redmond described the computer's game as being more aggressive than against Fan.[47]

According to 9-dan Go grandmaster Kim Seong-ryong, Lee seemed stunned by AlphaGo's strong play on the 102nd stone.[48] After watching AlphaGo make the game's 102nd move, Lee mulled over his options for more than 10 minutes.[48]

First 99 moves
Moves 100–186

Game 2

AlphaGo (black) won the second game. Lee stated afterwards that "AlphaGo played a nearly perfect game",[49] "from very beginning of the game I did not feel like there was a point that I was leading".[50] One of the creators of AlphaGo, Demis Hassabis, said that the system was confident of victory from the midway point of the game, even though the professional commentators could not tell which player was ahead.[50]

Michael Redmond (9p) noted that AlphaGo's 19th stone (move 37) was "creative" and "unique".[30] Lee took an unusually long time to respond to the move.[30] An Younggil (8p) called AlphaGo's move 37 "a rare and intriguing shoulder hit" but said Lee's counter was "exquisite". He stated that control passed between the players several times before the endgame, and especially praised AlphaGo's moves 151, 157, and 159, calling them "brilliant".[51]

AlphaGo showed anomalies and moves from a broader perspective which professional Go players described as looking like mistakes at the first sight but an intentional strategy in hindsight.[52] As one of the creators of the system explained, AlphaGo does not attempt to maximize its points or its margin of victory, but tries to maximize its probability of winning.[30][53] If AlphaGo must choose between a scenario where it will win by 20 points with 80 percent probability and another where it will win by 1 and a half points with 99 percent probability, it will choose the latter, even if it must give up points to achieve it.[30] In particular, move 167 by AlphaGo seemed to give Lee a fighting chance and was declared to look like an obvious mistake by commentators. An Younggil stated "So when AlphaGo plays a slack looking move, we may regard it as a mistake, but perhaps it should more accurately be viewed as a declaration of victory?"[54]

First 99 moves
Moves 100–199
Moves 200–211

Game 3

AlphaGo (white) won the third game.[55]

After the second game, there had still been strong doubts among players whether AlphaGo was truly a strong player in the sense that a human might be. The third game was described as removing that doubt; with analysts commenting that:

AlphaGo won so convincingly as to remove all doubt about its strength from the minds of experienced players. In fact, it played so well that it was almost scary ... In forcing AlphaGo to withstand a very severe, one-sided attack, Lee revealed its hitherto undetected power ... Lee wasn’t gaining enough profit from his attack ... One of the greatest virtuosos of the middle game had just been upstaged in black and white clarity.[54]

According to An Younggil (8p) and David Ormerod, the game showed that "AlphaGo is simply stronger than any known human Go player."[54] AlphaGo was seen to capably navigate tricky situations known as ko that did not come up in the previous two matches.[56] An and Ormerod consider move 148 to be particularly notable: in the middle of a complex ko fight, AlphaGo displayed sufficient "confidence" that it was winning the fight to play a large move elsewhere.[54]

Lee, playing black, opened with a High Chinese formation and generated a large area of black influence, which AlphaGo invaded at move 12. This required the program to defend a weak group, which it did successfully.[54] An Younggil described Lee's move 31 as possibly the "losing move"[54] and Andy Jackson of the American Go Association considered that the outcome had already been decided by move 35.[53] AlphaGo had gained control of the game by move 48, and forced Lee onto the defensive. Lee counterattacked at moves 77/79, but AlphaGo's response was effective and its move 90 succeeded in simplifying the position. It then gained a large area of control at the bottom of the board, strengthening its position with moves from 102 to 112 described by An as "sophisticated".[54] Lee attacked again at moves 115 and 125, but AlphaGo's responses were again effective. Lee eventually attempted a complex ko from move 131, without forcing an error from the program, and he resigned at move 176.[54]

First 99 moves
Moves 100–176 (122 at 113,
154 at , 163 at 145, 164 at 151,
166 and 171 at 160, 169 at 145, 175 at )

Game 4

Lee (white) won the fourth game. Lee chose to play a type of extreme strategy, known as amashi, in response to AlphaGo's apparent preference for Souba Go (attempting to win by many small gains when the opportunity arises), taking territory at the perimeter rather than the center.[57] By doing so, his apparent aim was to force an "all or nothing" style of situation – a possible weakness for an opponent strong at negotiation types of play, and one which might make AlphaGo's capability of deciding slim advantages largely irrelevant.[57]

The first 11 moves were identical to the second game, where Lee also played white. In the early game, Lee concentrated on taking territory in the edges and corners of the board, allowing AlphaGo to gain influence in the top and centre. Lee then invaded AlphaGo's region of influence at the top with moves 40 to 48, following the amashi strategy. AlphaGo responded with a shoulder hit at move 47, subsequently sacrificing four stones elsewhere, and gaining the initiative with moves 47 to 53 and 69. Lee tested AlphaGo with moves 72 to 76 without provoking an error, and by this point in the game commentators had begun to feel Lee's play was a lost cause. However, an unexpected play at white 78, described as "a brilliant tesuji", turned the game around.[57] The move developed a white wedge at the centre, and increased the game's complexity.[58] Gu Li (9p) described it as a "divine move" and stated that the move had been completely unforeseen by him.[57]

AlphaGo responded poorly on move 79, at which time it estimated it had a 70% chance to win the game. Lee followed up with a strong move at white 82.[57] AlphaGo's initial response in moves 83 to 85 was appropriate, but at move 87, its estimate of its chances to win suddenly plummeted,[59][60] provoking it to make a series of very bad moves from black 87 to 101. David Ormerod characterised moves 87 to 101 as typical of Monte Carlo-based program mistakes.[57] Lee took the lead by white 92, and An Younggil described black 105 as the final losing move. Despite good tactics during moves 131 to 141, AlphaGo proved unable to recover during the endgame and resigned.[57] AlphaGo's resignation was triggered when it evaluated its chance of winning to be less than 20%; this is intended to match the decision of professionals who resign rather than play to the end when their position is felt to be irrecoverable.[58]

An Younggil at Go Game Guru concluded that the game was "a masterpiece for Lee Sedol and will almost certainly become a famous game in the history of Go".[57] Lee commented after the match that he considered AlphaGo was strongest when playing white (second).[61] For this reason, he requested that he play black in the fifth game, which is considered more risky.

David Ormerod of Go Game Guru stated that although an analysis of AlphaGo's play around 79–87 was not yet available, he believed it was a result of a known weakness in play algorithms which use Monte Carlo tree search. In essence, the search attempts to prune sequences which are less relevant. In some cases, a play can lead to a very specific line of play which is significant, but which is overlooked when the tree is pruned, and this outcome is therefore "off the search radar".[62]

First 99 moves
Moves 100–180 (177 at , 178 at )

Game 5

AlphaGo (white) won the fifth game.[63] The game was described as being close. Hassabis stated that the result came after the program made a "bad mistake" early in the game.[63]

Lee, playing black, opened in a similar fashion to the first game and then began to stake out territory in the right and top left corners – a similar strategy to the one he employed successfully in game 4 – while AlphaGo gained influence in the centre of the board. The game remained even until white moves 48 to 58, which AlphaGo played in the bottom right. These moves unnecessarily lost ko threats and aji, allowing Lee to take the lead.[64] Michael Redmond (9p) speculated that perhaps AlphaGo had missed black's "tombstone squeeze" tesuji. Humans are taught to recognize the specific pattern, but it is a long sequence of moves if it has to be computed from scratch.

AlphaGo then started to develop the top of the board as well as the centre, and defended successfully against an attack by Lee in moves 69 to 81 that David Ormerod characterised as over-cautious. By white 90, AlphaGo had regained equality, and then played a series of moves described by Ormerod as "unusual... but subtly impressive" which gained a small advantage. Lee tried a Hail Mary pass with moves 167 and 169 but AlphaGo's defence was successful. An Younggil noted white moves 154, 186 and 194 as being particularly strong, and the program played an impeccable endgame, maintaining its lead until Lee resigned.[64]

First 99 moves
Moves 100–199 (118 at 107, 161 at )
Moves 200–280 (240 at 200, 271 at ,
275 at , 276 at )

Coverage

Live video of the games and associated commentary was broadcast in Korean, Chinese, Japanese, and English. Korean-language coverage was made available through Baduk TV.[65] Chinese-language coverage of game 1 with commentary by 9-dan players Gu Li and Ke Jie was provided by Tencent and LeTV respectively, reaching about 60 million viewers.[66] Online English-language coverage presented by US 9-dan Michael Redmond and Chris Garlock, a vice-president of the American Go Association, reached an average 80 thousand viewers with a peak of 100 thousand viewers near the end of game 1.[67]

Responses

AI community

AlphaGo's victory was a major milestone in artificial intelligence research.[68] Go had previously been regarded as a hard problem in machine learning that was expected to be out of reach for the technology of the time.[68][69][70] Most experts thought a Go program as powerful as AlphaGo was at least five years away;[71] some experts thought that it would take at least another decade before computers would beat Go champions.[72][73] Most observers at the beginning of the 2016 matches expected Lee to beat AlphaGo.[68]

With games such as checkers, chess, and now Go won by computer players, victories at popular board games can no longer serve as major milestones for artificial intelligence in the way that they used to. Deep Blue's Murray Campbell called AlphaGo's victory "the end of an era... board games are more or less done and it's time to move on."[68]

When compared with Deep Blue or with Watson, AlphaGo's underlying algorithms are potentially more general-purpose, and may be evidence that the scientific community is making progress toward artificial general intelligence.[74] Some commentators believe AlphaGo's victory makes for a good opportunity for society to start discussing preparations for the possible future impact of machines with general purpose intelligence. In March 2016, AI researcher Stuart Russell stated that "AI methods are progressing much faster than expected, (which) makes the question of the long-term outcome more urgent," adding that "in order to ensure that increasingly powerful AI systems remain completely under human control... there is a lot of work to do."[75] Some scholars, such as physicist Stephen Hawking, warn that some future self-improving AI could gain actual general intelligence, leading to an unexpected AI takeover; other scholars disagree: AI expert Jean-Gabriel Ganascia believes that "Things like 'common sense'... may never be reproducible",[76][77] and says "I don't see why we would speak about fears. On the contrary, this raises hopes in many domains such as health and space exploration."[75] Richard Sutton said "I don't think people should be scared... but I do think people should be paying attention."[78]

The DeepMind AlphaGo Team received the Inaugural IJCAI Marvin Minsky Medal for Outstanding Achievements in AI. "AlphaGo is a wonderful achievement, and a perfect example of what the Minsky Medal was initiated to recognise", said Professor Michael Wooldridge, Chair of the IJCAI Awards Committee. "What particularly impressed IJCAI was that AlphaGo achieves what it does through a brilliant combination of classic AI techniques as well as the state-of-the-art machine learning techniques that DeepMind is so closely associated with. It’s a breathtaking demonstration of contemporary AI, and we are delighted to be able to recognise it with this award".[79]

Go community

Go is a popular game in South Korea, China and Japan, and this match was watched and analyzed by millions of people worldwide.[68] Many top Go players characterized AlphaGo's unorthodox plays as seemingly-questionable moves that initially befuddled onlookers, but made sense in hindsight:[72] "All but the very best Go players craft their style by imitating top players. AlphaGo seems to have totally original moves it creates itself."[68] AlphaGo appeared to have unexpectedly become much stronger, even when compared with its October 2015 match against Fan Hui[80] where a computer had beaten a Go professional for the first time ever without the advantage of a handicap.[81]

China's number one player, Ke Jie, who was at the time the top-ranked player worldwide, initially claimed that he would be able to beat AlphaGo, but declined to play against it for fear that it would "copy my style".[82] As the matches progressed, Ke Jie went back and forth, stating that "it is highly likely that I (could) lose" after analyzing the first three matches,[83] but regaining confidence after the fourth match.[84]

Toby Manning, the referee of AlphaGo's match against Fan Hui, and Hajin Lee, secretary general of the International Go Federation, both reason that in the future, Go players will get help from computers to learn what they have done wrong in games and improve their skills.[81]

Lee apologized for his losses, stating after game three that "I misjudged the capabilities of AlphaGo and felt powerless."[68] He emphasized that the defeat was "Lee Se-dol's defeat" and "not a defeat of mankind".[77][85] Lee said his eventual loss to a machine was "inevitable" but stated that "robots will never understand the beauty of the game the same way that we humans do."[77] Lee called his game four victory a "priceless win that I (would) not exchange for anything."[85]

Government

In response to the match the South Korean government announced on 17 March 2016 that it would invest $863 million (1 trillion won) in artificial-intelligence (AI) research over the next five years.[86]

Documentary film

A documentary film about the matches, called AlphaGo, was made.[87][88] On 13 March 2020, the film was made free online on the DeepMind YouTube channel.[89]

See also

References
  1. "Artificial intelligence: Go master Lee Se-dol wins against AlphaGo program". BBC News Online. 13 March 2016. Retrieved 13 March 2016.
  2. "Computer Go". Go Game Guru. Archived from the original on 14 March 2016. Retrieved 13 March 2016.
  3. "Human champion certain he'll beat AI at ancient Chinese game". Associated Press. 22 February 2016. Archived from the original on 22 December 2018. Retrieved 22 February 2016.
  4. "이세돌 vs 알파고, '구글 딥마인드 챌린지 매치' 기자회견 열려" (in Korean). Korea Baduk Association. 22 February 2016. Archived from the original on 3 March 2016. Retrieved 22 February 2016.
  5. "Google's AlphaGo gets 'divine' Go ranking". The Straits Times.
  6. "From AI to protein folding: Our Breakthrough runners-up". Science. 22 December 2016. Retrieved 30 December 2016.
  7. "Machine trains self to beat humans at world's hardest game". Retro Report. Retrieved 15 December 2016.
  8. "Google's AI Wins First Game in Historic Match With Go Champion". WIRED. 9 March 2016.
  9. "AlphaGo victorious once again". The Korea Times. 11 March 2016. Retrieved 16 March 2016.
  10. Bouzy, Bruno; Cazenave, Tristan (9 August 2001). "Computer Go: An AI oriented survey". Artificial Intelligence. 132 (1): 39–103. doi:10.1016/S0004-3702(01)00127-8.
  11. Johnson, George (29 July 1997), "To Test a Powerful Computer, Play an Ancient Game", The New York Times, retrieved 16 June 2008
  12. Good, I J (21 January 1965). "Go, Jack Good". New Scientist. Retrieved 16 March 2016 – via Atlas Computer Laboratory, Chilton.
  13. Silver, David; Huang, Aja; Maddison, Chris J.; Guez, Arthur; Sifre, Laurent; Driessche, George van den; Schrittwieser, Julian; Antonoglou, Ioannis; Panneershelvam, Veda; Lanctot, Marc; Dieleman, Sander; Grewe, Dominik; Nham, John; Kalchbrenner, Nal; Sutskever, Ilya; Lillicrap, Timothy; Leach, Madeleine; Kavukcuoglu, Koray; Graepel, Thore; Hassabis, Demis (28 January 2016). "Mastering the game of Go with deep neural networks and tree search". Nature. 529 (7587): 484–489. Bibcode:2016Natur.529..484S. doi:10.1038/nature16961. ISSN 0028-0836. PMID 26819042. S2CID 515925.
  14. Wedd, Nick. "Human-Computer Go Challenges". computer-go.info. Retrieved 28 October 2011.
  15. Cho, Adrian (27 January 2016). "'Huge leap forward': Computer that mimics human brain beats professional at game of Go". Science.
  16. Hoffman, William (9 March 2016). "Elon Musk Says Google Deepmind's Go Victory Is a 10-Year Jump For A.I." Inverse. Retrieved 12 March 2016.
  17. "Artificial intelligence: Google's AlphaGo beats Go master Lee Se-dol". BBC News.
  18. Müller, Martin. Computer Go, Artificial Intelligence 134 (2002): p150
  19. "Google achieves AI 'breakthrough' by beating Go champion". BBC News. 27 January 2016. Retrieved 28 January 2016.
  20. Gibney, Elizabeth (27 January 2016), "Go players react to computer defeat", Nature, doi:10.1038/nature.2016.19255, S2CID 146868978
  21. Mackenzie, Dana (9 March 2016). "Update: Why this week's man-versus-machine Go match doesn't matter (and what does)". Science. doi:10.1126/science.aaf4152.
  22. "Zen computer Go program beats Takemiya Masaki with just 4 stones!". Go Game Guru. Archived from the original on 1 February 2016. Retrieved 28 January 2016.
  23. "「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.
  24. "The Sadness and Beauty of Watching Google's AI Play Go". WIRED. 11 March 2016.
  25. Kloester, Ben (4 March 2016). "Can AlphaGo defeat Lee Sedol?". Go Game Guru. Archived from the original on 11 March 2016. Retrieved 10 March 2016.
  26. "Match 4 - Google DeepMind Challenge Match: Lee Sedol vs AlphaGo". 13 March 2016. Event occurs at 6:09:35-6:11:20. Retrieved 24 March 2016.
  27. "Match 3 - Google DeepMind Challenge Match: Lee Sedol vs AlphaGo". 12 March 2016. Retrieved 20 March 2016.
  28. Metz, Cade (27 January 2016). "In Major AI Breakthrough, Google System Secretly Beats Top Player at the Ancient Game of Go". WIRED. Retrieved 1 February 2016.
  29. "Research Blog: AlphaGo: Mastering the ancient game of Go with Machine Learning". Google Research Blog. 27 January 2016.
  30. "Google's AI Wins Pivotal Second Game in Match With Go Grandmaster". WIRED. 10 March 2016. Retrieved 12 March 2016.
  31. Hassabis, Demis [@demishassabis] (11 March 2016). "We are using roughly same amount of compute power as in Fan Hui match: distributing search over further machines has diminishing returns" (Tweet). Retrieved 14 March 2016 – via Twitter.
  32. "Showdown". The Economist. Retrieved 19 November 2016.
  33. Jouppi, Norm (18 May 2016). "Google supercharges machine learning tasks with TPU custom chip". Google Cloud Platform Blog. Retrieved 26 June 2016.
  34. Lee SeDol. gobase.org. Retrieved 22 June 2010.
  35. "Lee Sedol expects 'not easy' game with AlphaGo in 3rd Go match". Shanghai Daily.
  36. Zastrow, Mark. "'I'm in shock!' How an AI beat the world's best human at Go". New Scientist.
  37. "Go Commentary: Lee Sedol vs Park Junghwan – 43rd Myeongin Final, Game 4". Go Game Guru. Archived from the original on 3 May 2016. Retrieved 13 March 2016.
  38. "AlphaGo". Google DeepMind. Archived from the original on 30 January 2016. Retrieved 10 March 2016.
  39. "Google's AI AlphaGo to take on world No 1 Lee Se-dol in live broadcast". The Guardian. 5 February 2016. Retrieved 15 February 2016.
  40. "Google DeepMind is going to take on the world's best Go player in a luxury 5-star hotel in South Korea". Business Insider. 22 February 2016. Retrieved 23 February 2016.
  41. Novet, Jordan (4 February 2016). "YouTube will livestream Google's AI playing Go superstar Lee Sedol in March". VentureBeat. Retrieved 7 February 2016.
  42. "李世乭：即使Alpha Go得到升级也一样能赢" (in Chinese). JoongAng Ilbo. 23 February 2016. Retrieved 24 February 2016.
  43. "Why the Final Game Between AlphaGo and Lee Sedol Is Such a Big Deal for Humanity". Wired. 14 March 2016. Retrieved 18 March 2016.
  44. "Match 4 - Google DeepMind Challenge Match: Lee Sedol vs AlphaGo". DeepMind.
  45. "Google's AI beats world Go champion in first of five matches". BBC. 9 March 2016. Retrieved 9 March 2016.
  46. "AlphaGo defeats Lee Sedol in first game of historic man vs machine match". Go Game Guru. 9 March 2016. Archived from the original on 3 May 2016. Retrieved 9 March 2016.
  47. Chouard, Tanguy (9 March 2016). "The Go Files: AI computer wins first match against master Go player". Nature. doi:10.1038/nature.2016.19544. S2CID 180287588.
  48. "Surprised at his loss, Lee Se-dol says he's looking forward to another chance". The Hankyoreh.
  49. "Google AI wins second Go game against world champion". BBC. 10 March 2016. Retrieved 10 March 2016.
  50. Byford, Sam (10 March 2016). "Google's DeepMind beats Lee Se-dol again to go 2-0 up in historic Go series". The Verge.
  51. Ormerod, David (10 March 2016). "AlphaGo races ahead 2–0 against Lee Sedol". Go Game Guru. Archived from the original on 11 March 2016. Retrieved 11 March 2016.
  52. "Lee Sedol expects 'not easy' game with AlphaGo in 3rd Go match". Shanghai Daily. 10 March 2016. Retrieved 10 March 2016.
  53. Chouard, Tanguy (12 March 2016). "The Go Files: AI computer clinches victory against Go champion". Nature. doi:10.1038/nature.2016.19553. S2CID 155164502.
  54. Ormerod, David (12 March 2016). "AlphaGo shows its true strength in 3rd victory against Lee Sedol". Go Game Guru. Archived from the original on 13 March 2016. Retrieved 12 March 2016.
  55. "Artificial intelligence: Google's AlphaGo beats Go master Lee Se-dol". BBC. 12 March 2016. Retrieved 12 March 2016.
  56. Byford, Sam (12 March 2016). "AlphaGo beats Lee Se-dol again to take Google DeepMind Challenge series". The Verge. Retrieved 12 March 2016.
  57. Ormerod, David (13 March 2016). "Lee Sedol defeats AlphaGo in masterful comeback – Game 4". Go Game Guru. Archived from the original on 16 November 2016. Retrieved 13 March 2016.
  58. Metz, Cade (13 March 2016). "Go Grandmaster Lee Sedol Grabs Consolation Win Against Google's AI". Wired. Retrieved 14 March 2016.
  59. Hassabis, Demis. "Twitter post (12:09 a.m. – 13 Mar 2016)". Retrieved 13 March 2016.
  60. Hassabis, Demis. "Twitter post (12:36 a.m. – 13 Mar 2016)". Retrieved 13 March 2016.
  61. Lee Sedol in Google DeepMind Challenge Match 4 post-match press conference (13 March 2016)
  62. "Lee Sedol defeats AlphaGo in masterful comeback - Game 4". Go Game Guru. Archived from the original on 16 November 2016. Retrieved 13 March 2016.
  63. Byford, Sam (15 March 2016). "Google's AlphaGo AI beats Lee Se-dol again to win Go series 4-1". The Verge. Retrieved 15 March 2016.
  64. Ormerod, David (16 March 2016), AlphaGo defeats Lee Sedol 4–1 in Google DeepMind Challenge Match, Go Game Guru, archived from the original on 17 March 2016, retrieved 16 March 2016
  65. "바둑TV". Baduk TV.
  66. "The Sadness and Beauty of Watching Google's AI Play Go". WIRED. 11 March 2016. Retrieved 12 March 2016.
  67. "Künstliche Intelligenz: "Alpha Go spielt wie eine Göttin"". Golem.de.
  68. Steven Borowiec; Tracey Lien (12 March 2016). "AlphaGo beats human Go champ in milestone for artificial intelligence". Los Angeles Times. Retrieved 13 March 2016.
  69. Connor, Steve (27 January 2016). "A computer has beaten a professional at the world's most complex board game". The Independent. Retrieved 28 January 2016.
  70. "Google's AI beats human champion at Go". CBC News. 27 January 2016. Retrieved 28 January 2016.
  71. Dave Gershgorn (12 March 2016). "Google's AlphaGo Beats World Champion in Third Match to Win Entire Series". Popular Science. Retrieved 13 March 2016.
  72. "Google DeepMind computer AlphaGo sweeps human champ in Go matches". CBC News. Associated Press. 12 March 2016. Retrieved 13 March 2016.
  73. Sofia Yan (12 March 2016). "A Google computer victorious over the world's 'Go' champion". CNN Money. Retrieved 13 March 2016.
  74. "AlphaGo: Google's artificial intelligence to take on world champion of ancient Chinese board game". Australian Broadcasting Corporation. 8 March 2016. Retrieved 13 March 2016.
  75. Mariëtte Le Roux (12 March 2016). "Rise of the Machines: Keep an eye on AI, experts warn". Phys.org. Retrieved 13 March 2016.
  76. "Game over? New AI challenge to human smarts (Update)". phys.org. Retrieved 13 March 2016.
  77. Mariëtte Le Roux; Pascale Mollard (8 March 2016). "Game over? New AI challenge to human smarts (Update)". phys.org. Retrieved 13 March 2016.
  78. Tanya Lewis (11 March 2016). "An AI expert says Google's Go-playing program is missing 1 key feature of human intelligence". Business Insider. Retrieved 13 March 2016.
  79. "Marvin Minsky Medal for Outstanding Achievements in AI". International Joint Conference on Artificial Intelligence. 19 October 2017. Retrieved 21 October 2017.
  80. John Ribeiro (12 March 2016). "Google's AlphaGo AI program strong but not perfect, says defeated South Korean Go player". PC World. Retrieved 13 March 2016.
  81. Gibney, Elizabeth (2016). "Go players react to computer defeat". Nature. doi:10.1038/nature.2016.19255. S2CID 146868978.
  82. Neil Connor (11 March 2016). "Google AlphaGo 'can't beat me' says China Go grandmaster". The Telegraph (UK). Retrieved 13 March 2016.
  83. "Chinese Go master Ke Jie says he could lose to AlphaGo". The Dong-a Ilbo. 14 March 2016. Retrieved 17 March 2016.
  84. "'첫 불계승' 이세돌, 커제 9단 태도 좌우…알파고와의 5국 중계는 어디서?". Hankook Ilbo (in Korean). 14 March 2016. Retrieved 17 March 2016."...if today's performance was its true capability, then it doesn't deserve to play against me."
  85. Yoon Sung-won (14 March 2016). "Lee Se-dol shows AlphaGo beatable". The Korea Times. Retrieved 15 March 2016.
  86. Zastrow, Mark (18 March 2016). "South Korea trumpets $860-million AI fund after AlphaGo 'shock'". Nature. doi:10.1038/nature.2016.19595. S2CID 167331855. Retrieved 20 March 2016.
  87. https://www.alphagomovie.com/
  88. https://www.rottentomatoes.com/m/alphago/
  89. "AlphaGo - The Movie | Full Documentary". Retrieved 20 March 2020.

Official match commentary

Official match commentary by Michael Redmond (9-dan pro) and Chris Garlock on Google DeepMind's YouTube channel:

SGF files

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.