Master (software)

Last updated December 08, 2024

Master is a version of DeepMind's Go software AlphaGo, named after the account name (originally Magister/Magist) used online, which won 60 straight online games against human professional Go players from 29 December 2016 to 4 January 2017. This version was also used in the Future of Go Summit in May 2017.^[1]^[2] It used four TPUs on a single machine with Elo rating 4,858.^[3] DeepMind claimed that AlphaGo Master was 3-stone stronger than the version used in AlphaGo v. Lee Sedol.^[4]

Matches

Online games

The software was first used to play games against professional players on 29 December 2016 on the Tygem Go server, under the account name 'Magister' (shown as 'Magist' at the server's Chinese version). The account name was changed to 'Master' on 30 December. After playing 30 games on Tygem, it was moved to the FoxGo server on 1 January 2017.

Master played at the pace of 10 games per day. Many quickly suspected it to be an AI player due to little or no resting between games. After winning its 59th game it was revealed in the chatroom that Master was controlled by Aja Huang of the DeepMind team.^[7] On 4 January 2017, after these games were completed, Demis Hassabis, the co-founder of DeepMind, confirmed that Magister and Master both played using an updated version of AlphaGo^[8]^[9] and said, "We're looking forward to playing some official, full-length games later [in 2017] in collaboration with Go organizations and experts".^[8]^[9]

Gu Li, a 9-dan player and co-founder of FoxGo, offered a bounty of 100,000 RMB (14,400 USD) to the first human player who could defeat Master.^[9] However, no one took the bounty since Master's final online record was 60 wins and 0 losses,^[10] including three victories over Go's top ranked player, Ke Jie,^[11] who had been quietly briefed in advance that Master was a version of AlphaGo.^[10]

Master's adversaries included many world champions such as Ke Jie, Park Jeong-hwan, Yuta Iyama, Tuo Jiaxi, Mi Yuting, Shi Yue, Chen Yaoye, Li Qincheng, Gu Li, Chang Hao, Tang Weixing, Fan Tingyu, Zhou Ruiyang, Jiang Weijie, Chou Chun-hsun, Kim Ji-seok, Kang Dong-yun, Park Yeong-hun, and Won Seong-jin, and also included national champions or world championship runners-up such as Lian Xiao, Tan Xiao, Meng Tailing, Dang Yifei, Huang Yunsong, Yang Dingxin, Gu Zihao, Shin Jinseo, Cho Han-seung, and An Sungjoon.^[12] All 60 games except one were fast-paced games with three 20 or 30 seconds byo-yomi. Master offered to extend the byo-yomi to one minute when playing with Nie Weiping due to his old age.

No.	Date	Player (dan during the game)	Time control	Moves	Master color and result
1	29 December 2016	Pan Tingyu (1 dan)	three 20-second byo-yomi	146	White won by resignation
2	29 December 2016	Zhang Ziliang (1 dan)	three 20-second byo-yomi	174	White won by resignation
3	29 December 2016	Ding Shixiong (3 dan)	three 20-second byo-yomi	151	Black won by resignation
4	29 December 2016	Xie Erhao (4 dan)	three 20-second byo-yomi	222	White won by resignation
5	29 December 2016	Yu Zhiying (5 dan)	three 20-second byo-yomi	113	Black won by resignation
6	29 December 2016	Li Xiangyu (3 dan)	three 20-second byo-yomi	131	Black won by resignation
7	29 December 2016	Qiao Zhijian (4 dan)	three 20-second byo-yomi	163	Black won by resignation
8	29 December 2016	Han Yizhou (5 dan)	three 20-second byo-yomi	104	White won by resignation
9	29 December 2016	Meng Tailing (6 dan)	three 20-second byo-yomi	275	Black won by 4.5 points
10	29 December 2016	Meng Tailing (6 dan)	three 20-second byo-yomi	148	White won by resignation
11	30 December 2016	Chen Hao (5 dan)	three 20-second byo-yomi	170	White won by resignation
12	30 December 2016	Ryu Suhang (5 dan)	three 20-second byo-yomi	144	White won by resignation
13	30 December 2016	Wang Haoyang (6 dan)	three 20-second byo-yomi	136	White won by resignation
14	30 December 2016	Yan Zaiming (3 dan)	three 20-second byo-yomi	129	Black won by resignation
15	30 December 2016	Park Junghwan (9 dan)	three 20-second byo-yomi	150	White won by time
16	30 December 2016	Lian Xiao (7 dan)	three 20-second byo-yomi	122	White won by resignation
17	30 December 2016	Lian Xiao (7 dan)	three 20-second byo-yomi	164	White won by resignation
18	30 December 2016	Ke Jie (9 dan)	three 20-second byo-yomi	228	Black won by 5.5 points
19	30 December 2016	Ke Jie (9 dan)	three 20-second byo-yomi	128	White won by resignation
20	30 December 2016	Park Junghwan (9 dan)	three 20-second byo-yomi	255	Black won by 5.5 points
21	31 December 2016	Chen Yaoye (9 dan)	three 20-second byo-yomi	270	White won by 5.5 points
22	31 December 2016	Chen Yaoye (9 dan)	three 20-second byo-yomi	277	White won by 4.5 points
23	31 December 2016	Kim Jung-hyun (6 dan)	three 20-second byo-yomi	135	Black won by resignation
24	31 December 2016	Park Junghwan (9 dan)	three 20-second byo-yomi	223	Black won by resignation
25	31 December 2016	Park Junghwan (9 dan)	three 20-second byo-yomi	261	White won by 0.5 points
26	31 December 2016	Yun Chanhee (6 dan)	three 20-second byo-yomi	217	Black won by resignation
27	31 December 2016	Fan Tingyu (9 dan)	three 30-second byo-yomi	215	Black won by resignation
28	31 December 2016	Meng Tailing (6 dan)	three 20-second byo-yomi	163	Black won by resignation
29	31 December 2016	Mi Yuting (9 dan)	three 30-second byo-yomi	311	White won by 0.5 points
30	31 December 2016	Tang Weixing (9 dan)	three 30-second byo-yomi	186	White won by resignation
31	1 January 2017	Li Qincheng (9 dan)	1 minute + three 20-second byo-yomi	179	Black won by resignation
32	2 January 2017	Gu Li (9 dan)	1 minute + three 30-second byo-yomi	154	White won by resignation
33	2 January 2017	Gu Li (9 dan)	1 minute + three 30-second byo-yomi	191	Black won by resignation
34	2 January 2017	Dang Yifei (9 dan)	1 minute + three 30-second byo-yomi	149	Black won by resignation
35	2 January 2017	Jiang Weijie (9 dan)	1 minute + three 30-second byo-yomi	280	White won by 1.5 points
36	2 January 2017	Gu Zihao (5 dan)	1 minute + three 30-second byo-yomi	209	Black won by resignation
37	2 January 2017	Park Yeong-hun (9 dan)	1 minute + three 30-second byo-yomi	173	Black won by resignation
38	2 January 2017	Tuo Jiaxi (9 dan)	1 minute + three 30-second byo-yomi	239	Black won by resignation
39	2 January 2017	Yuta Iyama (9 dan)	1 minute + three 30-second byo-yomi	135	Black won by resignation
40	2 January 2017	Meng Tailing (6 dan)	1 minute + three 30-second byo-yomi	274	White won by 2.5 points
41	2 January 2017	Kim Ji-seok (9 dan)	1 minute + three 30-second byo-yomi	170	White won by resignation
42	3 January 2017	Yang Dingxin (4 dan)	1 minute + three 30-second byo-yomi	125	Black won by resignation
43	3 January 2017	Kang Dong-yun (9 dan)	1 minute + three 30-second byo-yomi	165	Black won by resignation
44	3 January 2017	An Sung-joon (7 dan)	1 minute + three 30-second byo-yomi	260	White won by 2.5 points
45	3 January 2017	Shi Yue (9 dan)	1 minute + three 30-second byo-yomi	167	Black won by resignation
46	3 January 2017	Lian Xiao (7 dan)	1 minute + three 30-second byo-yomi	144	White won by resignation
47	3 January 2017	Tan Xiao (7 dan)	1 minute + three 30-second byo-yomi	191	Black won by resignation
48	3 January 2017	Park Junghwan (9 dan)	1 minute + three 30-second byo-yomi	270	White won by 1.5 points
49	3 January 2017	Won Seong-jin (9 dan)	1 minute + three 30-second byo-yomi	222	White won by resignation
50	3 January 2017	Ke Jie (9 dan)	1 minute + three 30-second byo-yomi	178	White won by resignation
51	4 January 2017	Chou Chun-hsun (9 dan)	1 minute + three 30-second byo-yomi	118	White won by resignation
52	4 January 2017	Fan Tingyu (9 dan)	1 minute + three 30-second byo-yomi	202	White won by resignation
53	4 January 2017	Huang Yunsong (5 dan)	1 minute + three 30-second byo-yomi	133	Black won by resignation
54	4 January 2017	Nie Weiping (9 dan)	1 minute + three 60-second byo-yomi	254	Black won by 7.5 points
55	4 January 2017	Chen Yaoye (9 dan)	1 minute + three 30-second byo-yomi	267	White won by 1.5 points
56	4 January 2017	Cho Han-seung (9 dan)	1 minute + three 30-second byo-yomi	171	Black won by resignation
57	4 January 2017	Shin Jin-seo (6 dan)	1 minute + three 30-second byo-yomi	139	Black won by resignation
58	4 January 2017	Chang Hao (9 dan)	1 minute + three 30-second byo-yomi	178	White won by resignation
59	4 January 2017	Zhou Ruiyang (9 dan)	1 minute + three 30-second byo-yomi	161	Black won by resignation
60	4 January 2017	Gu Li (9 dan)	1 minute + three 30-second byo-yomi	235	White won by 2.5 points

Future of Go Summit

The Master version also participated in the Future of Go summit in May 2017.^[1] It defeated Ke Jie in a three-game match by three to zero and beat a human team with five top Go professionals.

Innovative moves

Go experts were extremely impressed by Master's performance and by its non-human play style in its online games. Ke Jie stated, "After humanity spent thousands of years improving our tactics, computers tell us that humans are completely wrong... I would go as far as to say not a single human has touched the edge of the truth of Go".^[10]

Master played many innovative moves and inspired professional players.^[13]^[14]^[15]^[16]^[17]^[18]^[19]

In the 23rd online game Master invaded the 3-3 point at a very early stage.^[20]

Online game 23, Master (black) v. Kim Jung-hyun

In the 24th online game Master played six stones along the second line.^[20]

Online game 24 Master (black) v. Park Junghwan

Operator errors

On 20 January 2017, DeepMind team members Fan Hui ^[21] and Aja Huang^[22] disclosed that Master's operator accidentally entered a move other than AlphaGo's choice in two situations during the online games.

In the 9th online game, Master recommended point a for Move 107.

Online game 9, Master (black) v. Meng Tailing.

In the 39th online game, Master recommended point a for Move 99.

Online game 39, Master (black) v. Yuta Iyama

Example game

Online game 30: Master (white) v. Tang Weixing (31 December 2016), Master won by resignation. White 36 was widely praised.^[23]

First 99 moves

Moves 100-186 (149 at 131, 150 at 130)

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References

1 2 "AlphaGo官方解读让三子对人类高手没这种优势" (in Chinese). Sina. 25 May 2017. Retrieved 1 June 2017.
↑ "各版alphago实力对比 master能让李世石版3子" (in Chinese). Sina. 24 May 2017. Retrieved 2 June 2017.
↑ Silver, David; Schrittwieser, Julian; Simonyan, Karen; Antonoglou, Ioannis; Huang, Aja; Guez, Arthur; Hubert, Thomas; Baker, Lucas; Lai, Matthew; Bolton, Adrian; Chen, Yutian; Lillicrap, Timothy; Fan, Hui; Sifre, Laurent; Driessche, George van den; Graepel, Thore; Hassabis, Demis (19 October 2017). "Mastering the game of Go without human knowledge" (PDF). Nature . 550 (7676): 354–359. Bibcode:2017Natur.550..354S. doi:10.1038/nature24270. ISSN 0028-0836. PMID 29052630. S2CID 205261034.
↑ "AlphaGo棋力比去年涨三子柯洁想赢它可能只剩一招" (in Chinese). Sina. 25 May 2017. Retrieved 1 June 2017.
↑ "AlphaGo teaching tool". DeepMind.
↑ "AlphaGo教学工具上线樊麾：使用Master版本" (in Chinese). Sina.com.cn. 11 December 2017. Retrieved 11 December 2017.
↑ "横扫中日韩棋手斩获59胜的Master发话：我是阿尔法狗". 澎湃新闻. 2017-01-04.
1 2 Demis Hassabis (4 January 2017). "Demis Hassabis on Twitter: "Excited to share an update on #AlphaGo!"". Demis Hassabis's Twitter account. Retrieved 4 January 2017.
1 2 3 Elizabeth Gibney (4 January 2017). "Google reveals secret test of AI bot to beat top Go players". Nature . Retrieved 4 January 2017.
1 2 3 "Humans Mourn Loss After Google Is Unmasked as China's Go Master". Wall Street Journal. 5 January 2017. Retrieved 6 January 2017.
↑ "The world's best Go player says he still has "one last move" to defeat Google's AlphaGo AI". Quartz . 4 January 2017. Retrieved 6 January 2017.
↑ "Full list of human players participating in the 60 games" (in Chinese). Sohu. 13 February 2017. Retrieved 23 April 2017.
↑ Nie Weiping (3 January 2017). "神秘高手Master颠覆了围棋传统，这更证明了藤泽秀行那句话" (in Chinese). Toutiao . Retrieved 24 April 2017.
↑ "韩国研究新版AlphaGo：穿越而来展示未来围棋" (in Chinese). Sina.com. 11 January 2017. Retrieved 24 April 2017.
↑ "金成龙分析AlphaGo：愿你为人类划开围棋的新天地" (in Chinese). Sina.com. 28 January 2017. Retrieved 24 April 2017.
↑ "韩国家队分析AlphaGo60局1 很强但不"完美"" (in Chinese). Sina.com. 31 January 2017. Retrieved 24 April 2017.
↑ "韩国家队分析AlphaGo60局2 井山一局最有机会" (in Chinese). Sina.com. 2 February 2017. Retrieved 24 April 2017.
↑ "阿法狗最令人感动一手王铭琬：推波助澜" (in Chinese). Sina.com. 6 February 2017. Retrieved 24 April 2017.
↑ Nie Weiping (19 January 2017). "李昌镐学习"阿法狗流"，日本棋手放下包袱仍有一战" (in Chinese). Toutiao . Retrieved 24 April 2017.
1 2 "Innovations of AlphaGo". DeepMind. Archived from the original on 27 July 2019. Retrieved 23 April 2017.
↑ "Clarification". Fan Hui's Sina Weibo. 20 January 2017. Retrieved 11 May 2017.
↑ "Clarification". Aja Huang's Facebook. 20 January 2017. Retrieved 11 May 2017.
↑ "高手战Master技术分析：人类仍有机会赢AI？" (in Chinese). QQ.com. 2 May 2017. Retrieved 13 May 2017.

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[sina0524-1] 1 2 "AlphaGo官方解读让三子对人类高手没这种优势" (in Chinese). Sina. 25 May 2017. Retrieved 1 June 2017.

[2] "各版alphago实力对比 master能让李世石版3子" (in Chinese). Sina. 24 May 2017. Retrieved 2 June 2017.

[Nature2017-3] Silver, David; Schrittwieser, Julian; Simonyan, Karen; Antonoglou, Ioannis; Huang, Aja; Guez, Arthur; Hubert, Thomas; Baker, Lucas; Lai, Matthew; Bolton, Adrian; Chen, Yutian; Lillicrap, Timothy; Fan, Hui; Sifre, Laurent; Driessche, George van den; Graepel, Thore; Hassabis, Demis (19 October 2017). "Mastering the game of Go without human knowledge" (PDF). Nature . 550 (7676): 354–359. Bibcode:2017Natur.550..354S. doi:10.1038/nature24270. ISSN 0028-0836. PMID 29052630. S2CID 205261034.

[4] "AlphaGo棋力比去年涨三子柯洁想赢它可能只剩一招" (in Chinese). Sina. 25 May 2017. Retrieved 1 June 2017.

[5] "AlphaGo teaching tool". DeepMind.

[sina20171211-6] "AlphaGo教学工具上线樊麾：使用Master版本" (in Chinese). Sina.com.cn. 11 December 2017. Retrieved 11 December 2017.

[7] "横扫中日韩棋手斩获59胜的Master发话：我是阿尔法狗". 澎湃新闻. 2017-01-04.

[Master-8] 1 2 Demis Hassabis (4 January 2017). "Demis Hassabis on Twitter: "Excited to share an update on #AlphaGo!"". Demis Hassabis's Twitter account. Retrieved 4 January 2017.

[Nature-Master-9] 1 2 3 Elizabeth Gibney (4 January 2017). "Google reveals secret test of AI bot to beat top Go players". Nature . Retrieved 4 January 2017.

[WSJ_Mourn-10] 1 2 3 "Humans Mourn Loss After Google Is Unmasked as China's Go Master". Wall Street Journal. 5 January 2017. Retrieved 6 January 2017.

[11] "The world's best Go player says he still has "one last move" to defeat Google's AlphaGo AI". Quartz . 4 January 2017. Retrieved 6 January 2017.

[12] "Full list of human players participating in the 60 games" (in Chinese). Sohu. 13 February 2017. Retrieved 23 April 2017.

[13] Nie Weiping (3 January 2017). "神秘高手Master颠覆了围棋传统，这更证明了藤泽秀行那句话" (in Chinese). Toutiao . Retrieved 24 April 2017.

[sina20170111-14] "韩国研究新版AlphaGo：穿越而来展示未来围棋" (in Chinese). Sina.com. 11 January 2017. Retrieved 24 April 2017.

[15] "金成龙分析AlphaGo：愿你为人类划开围棋的新天地" (in Chinese). Sina.com. 28 January 2017. Retrieved 24 April 2017.

[16] "韩国家队分析AlphaGo60局1 很强但不"完美"" (in Chinese). Sina.com. 31 January 2017. Retrieved 24 April 2017.

[17] "韩国家队分析AlphaGo60局2 井山一局最有机会" (in Chinese). Sina.com. 2 February 2017. Retrieved 24 April 2017.

[18] "阿法狗最令人感动一手王铭琬：推波助澜" (in Chinese). Sina.com. 6 February 2017. Retrieved 24 April 2017.

[19] Nie Weiping (19 January 2017). "李昌镐学习"阿法狗流"，日本棋手放下包袱仍有一战" (in Chinese). Toutiao . Retrieved 24 April 2017.

[deepmindgame-20] 1 2 "Innovations of AlphaGo". DeepMind. Archived from the original on 27 July 2019. Retrieved 23 April 2017.

[21] "Clarification". Fan Hui's Sina Weibo. 20 January 2017. Retrieved 11 May 2017.

[22] "Clarification". Aja Huang's Facebook. 20 January 2017. Retrieved 11 May 2017.

[23] "高手战Master技术分析：人类仍有机会赢AI？" (in Chinese). QQ.com. 2 May 2017. Retrieved 13 May 2017.

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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 Title holders Tournaments
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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