Chess.com explained

Chess.com, LLC
Company Type:Internet chess server, Social media website
Language Count:57
Language:Afrikaans, Albanian, Arabic, Armenian, Azerbaijani, Bengali, Belarusian, Bosnian, Bulgarian, Catalan, Chinese, Chinese (Hong Kong), Chinese (Taiwan), Croatian, Czech, Danish, Dutch, English, Estonian, Filipino, Finnish, Flemish, French, Galician, Georgian, German, Greek, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Korean, Latvian, Lithuanian, Malay, Norwegian, Persian, Polish, Portuguese, Portuguese (Brazil), Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swahili, Swedish, Tagalog, Turkish, Turkmen, Ukrainian, Uzbek, Vietnamese
Location Country:United States
Industry:Internet
Num Employees:400+[1]
Registration:Optional
Num Users:150 million+
Current Status:Active
Programming Language:Java,[2] JavaScript, PHP
Type:Internet chess server

Chess.com is an internet chess server and social networking website.[3] The site has a freemium model in which some features are available for free, and others are available for accounts with subscriptions. Live online chess can be played against other users in daily, rapid, blitz or bullet time controls, with a number of chess variants available. Chess versus a chess engine, computer analysis, chess puzzles and teaching resources are offered.

As one of the largest chess platforms in the world,[4] Chess.com achieved the milestone of 100 million users on December 16, 2022[5] and has about 11 million daily active users as of April 2023.[6] Chess.com has hosted online tournaments including Titled Tuesdays, the PRO Chess League, the Speed Chess Championships, PogChamps, Online Chess Olympiads and computer vs. computer events.

History

Founding

The domain Chess.com was originally set up in 1995 by Aficionado, a company based in Berkeley, California to sell Chess Mentor, a chess tutoring software program.[7] In 2005, Internet entrepreneur Erik Allebest and partner Jarom "Jay" Severson, who met as undergraduate students at Brigham Young University, bought the domain name and assembled a team of software developers, redeveloping the site as a chess portal.[8] The site was relaunched in 2007, having heavy campaigning and promotion on social media.

Two years later, Chess.com acquired a similar chess social networking site, chesspark.com.[9] In October 2013, Chess.com acquired the Amsterdam-based chess news site chessvibes.com as well.[10] This news site, founded and operated by Dutch chess journalist Peter Doggers, continued to cover chess tournaments in a digital setting.[11] [12]

Growth in the 2010s

The website reached a milestone in 2014, when it announced that over a billion live games had been played on the site, including 100 million correspondence games.[13] In January 2016, Chess.com announced a two-year overhaul of its previous interface (titled 'v3'). The site introduced features including computer analysis of games, and the chess variants of crazyhouse, three-check chess, king of the hill, chess960, atomic and bughouse.[14] Chess.com reached another milestone in June 2017, as the 2,147,483,647th (= 231-1) game was played, which caused the iOS app to stop working for those with 32-bit Apple devices. This occurred because of an integer overflow problem whereby the number was too large to be represented in the number of storage bits that were used.[15] [16]

In May 2018, Chess.com acquired the 3300+ Elo-rated commercial chess engine Komodo, which ranked third behind Stockfish and Houdini at the time of acquisition.[17] In conjunction, the Komodo team announced the addition of the probabilistic method of Monte Carlo tree search machine learning, the same methods used by the recent chess projects AlphaZero and Leela Chess Zero.[18]

In November 2020, Chess.com acquired the rights to broadcast the World Chess Championship 2021, which is broadcast on live-streaming platform Twitch.[19]

Response to the Russian invasion of Ukraine

In response to the 2022 Russian invasion of Ukraine, Chess.com published two articles that were critical of the invasion and replaced Russian and Belarusian flags with grey flags that linked to these articles. In retaliation, Chess.com was blocked in Russia. The site blocked Sergey Karjakin, Russian (formerly Ukrainian) grandmaster, over his support for the invasion, and Karjakin in turn supported Russia's block of the website.[20] [21] [22] [23]

Chess cheating controversy

See main article: Carlsen–Niemann controversy. In September 2022, Chess.com was caught in the furor of a controversy regarding cheating in professional chess games. A controversy erupted with accusations by grandmaster Magnus Carlsen against Hans Niemann.[24] [25] Leaked emails revealed that some people cheated on the Chess.com platform in games involving prize money and that Chess.com removed some players' accounts, including grandmaster Maxim Dlugy, who had been found to be cheating.[26] In August 2023, a US District Court judge dismissed the lawsuit filed by Niemann.[27]

Chess.com Global Championship

In November 2022, The Chess.com Global Championship was inaugurated with a $1,000,000 prize pool.[28] 8 players that advanced from the CGC Knockout competed for a $500,000 total prize fund and Global Champion title in the finals taking place in Toronto, Canada. Wesley So became the first Chess.com Global Champion, defeating Nihal Sarin in the finals with a match score of 4.5–1.5.[29]

Subsidiary companies

ChessKid.com

Chess.com runs the subsidiary site chesskid.com for chess players that are under the minimum age requirement for Chess.com. [30]

ChessKid.com has run a yearly online championship called CONIC (the ChessKid Online National Invitational Championship), since 2012 which is recognized by the United States Chess Federation.[31] [32] According to David Petty, the event organizer in 2013, ChessKid has made agreements and partnerships with chess associations in schools. In 2014, for a trial period. They have a long-term partnership with the NTCA (North Texas Chess Academy) which gives children access to online instructors.[33]

Play Magnus Group

In August 2022, the Play Magnus Group accepted an offer to be acquired by Chess.com at a value of 800 million kr (US$80 million). The Play Magnus Group owns brands and businesses including the chess server chess24, the mobile app Play Magnus, the Champions Chess Tour, and the chess improvement website Chessable. On December 16, 2022, the acquisition was officially closed.[34] [35] According to Dot Esports, the Play Magnus Group was unable to make a "sustainable profit" on anything but Chessable, and the merge left "no other realistic chess competitor" except the free, open-source Lichess.[36]

Tournaments and events

Speed Chess Championship

Chess.com has held the Speed Chess Championship annually since 2016, involving a single-elimination tournament featuring some of the world's best players. Nakamura has won five championships, while Carlsen has won three.[37]

Tournament formula

The most important elements of the tournament formula:[38]

Winners of Speed Chess Championships

NoYearWinner Runner-up Final scorePrize fund
12016[39] Magnus Carlsen14.5–10.5$40,000
22017[40] Magnus CarlsenHikaru Nakamura18–9$50,000
32018[41] Hikaru NakamuraWesley So15.5–12.5$55,000
42019[42] Hikaru NakamuraWesley So19.5–14.5$50,000
52020[43] Hikaru NakamuraMaxime Vachier-Lagrave18.5–12.5$100,000
62021[44] Hikaru NakamuraWesley So23–8$100,000
72022[45] Hikaru NakamuraMagnus Carlsen14.5–13.5$100,000
82023[46] Magnus CarlsenHikaru Nakamura13.5–12.5$150,000
92024[47] $175,000

Daily Chess Championships

Tournament formula

The tournament starts on January 1 and, depending on the number of participants, consists of 4 or 5 rounds. All players are divided into groups (up to 12 people), and only the winners advance to the next round. Players play in each round a maximum of 22 games simultaneously (with each opponent as White and Black), with a maximum of one day allocated for each move. So it can be considered a form of correspondence chess. The winner of the Championship is the player who accumulates the most points in the final round.

Winners of Daily Chess Championships

NoYearGoldSilverBronzeNumber of players
12018[48] Jbd735 Rob King Alexey Zimin7344
22019[49] Sascha GrimmJbd735 Daan Brandenburg11609
32020[50] Uffe Vinther-Schou Andrei Belozerov Irmak Sipahioglu16831
42021[51] Uffe Vinther-Schou Andrei Belozerov Leonid Starozhilov
Marcin Szymański		16505
52022[52] NefariousNebula Andrei Belozerov volunteers199833633
62023[53] Marcin Szymański DanilinDP Kacper Drozdowski35000
72024[54] ???60466
Italic font - only usernames available on the chess.com platform.

PRO Chess League

Winners of PRO Chess League

NoYearWinner Runner-up Final score
12017[55] St. Louis Arch BishopsNorway Gnomes9–7
22018[56] Armenia EaglesChengdu Pandas12–11
32019[57] St. Louis Arch BishopsBaden-Baden Snowballs10–6
42020[58] St. Louis Arch BishopsCanada Chessbrahs/Chengde Panda9.5-6.5
52021[59] Russia WizardsSt. Louis Arch Bishops9–7
62023[60] Gotham KnightsShanghai Tigers9.5-6.5

Titled Tuesdays

Titled Tuesday is an 11-round Swiss-system 3+1 blitz chess tournament held every Tuesday.[61] Grandmaster participants include Hikaru Nakamura, Magnus Carlsen, Maxime Vachier-Lagrave, Alexander Grischuk, Dmitry Andreikin, Alireza Firouzja, Daniel Naroditsky, Wesley So, and Fabiano Caruana. The first event was held on October 28, 2014, with a prize fund of $500 and was won by Baadur Jobava.[62] The prize fund was gradually upgraded to $5000 per week.[63] As of February 2024, GM Hikaru Nakamura has won a total of 64 tournament wins since October 2020, followed by GM Dmitry Andreikin with 16,[64] Magnus Carlsen has won three of the events in which he has partaken as of 2017.[65]

In June 2018, Chess.com held a special version of the tournament for which the winner would go on to participate in the Isle of Man International which had a prize fund of £144,000.[66] Iranian GM Pouria Darini won the event.[67]

Death Matches

Death Matches were introduced in January 2012. They feature titled players taking part in a series of blitz games over a non-stop 3-hour period (5-minute, 3-minute and 1-minute, all with a one-second increment).[68] There have been 38 deathmatches, participants including the grandmasters Hikaru Nakamura, Dmitry Andreikin, Maxime Vachier-Lagrave, Lê Quang Liêm, Wesley So, Fabiano Caruana, Judit Polgár and Nigel Short.[69]

Chess.com Computer Chess Championship

In November 2017, Chess.com held an open tournament, called the Chess.com Computer Chess Championship (CCCC, later CCC), with the ten strongest chess engines, with $2,500 in prize money. The top-two engines competed in a "Superfinal" tournament between the two finalists – Stockfish and Houdini. In the 20-game Superfinal, Stockfish won over Houdini with a score 10.5–9.5. Five games were decisive, with 15 ending in a draw. Of the decisive games, three games were won by Stockfish, and two by Houdini.

In August 2018, the site announced that the Chess.com Computer Chess Championship has returned, this time as a non-stop tournament for chess engines.[70] [71]

Main events
Event Year Time controls Winner Runner-up Ref
Computer Chess Championship 2017 15+2 Stockfish (1) [72] [73]
CCC 1: Rapid Rumble 2018 15+5 Stockfish (2) [74]
CCC 2: Blitz Battle 2018 5+2 Stockfish (3) [75]
CCC 3: Rapid Redux 2019 30+5 Stockfish (4) [76]
CCC 4: Bullet Brawl 2019 1+2 Stockfish (5) [77]
CCC 5: Escalation 2019 10+5 Stockfish (6) [78]
CCC 6: Winter Classic 2019 10+10 Stockfish (7) [79]
CCC 7: Blitz Bonanza 2019 5+2 Leela Chess Zero (1) [80]
CCC 8: Deep Dive 2019 15+5 Stockfish (8) [81]
CCC 9: The Gauntlet 2019 5+2, 10+5 Stockfish (9) Leelenstein [82]
CCC 10: Double Digits 2019 10+3 Leelenstein (1) [83]
CCC 112019 30+5 Leela Chess Zero (2) [84]
CCC 12: Bullet Madness!2020 1+1 Leela Chess Zero (3) Leelenstein [85]
CCC 13: Heptagonal 2020 5+5 Leela Chess Zero (4) [86]
CCC 14202015+5, 5+2, 1+1Leela Chess Zero (5)Leelenstein[87]
CCC Blitz 202020205+5Stockfish (10)Leela Chess Zero[88]
CCC Rapid 2021202115+3Stockfish (11) Leela Chess Zero[89]
CCC Blitz 2021 2021 5+5 Stockfish (12) [90]
CCC Chess 960 Blitz 2021 5+5 Stockfish (13) [91]
CCC 16: Rapid 2021 15+3 Stockfish (14) [92]
CCC 16: Bullet 2021 2+1 Stockfish (15) [93]
CCC 16: Blitz20225+5Stockfish (16) Dragon[94]
CCC 17: Rapid202215+3Stockfish (17)Dragon[95]
CCC 17: Bullet20222+1Stockfish (18)Dragon[96]
CCC 17: Blitz20225+5Stockfish (19)Leela Chess Zero[97]
CCC 18: Rapid202215+3Stockfish (20)Leela Chess Zero[98]
CCC 19: Blitz20225+5Stockfish (21)Dragon[99]
CCC 19: Rapid202215+3Stockfish (22)Leela Chess Zero[100]
CCC 19: Bullet20231+1Stockfish (23)Dragon[101]
CCC 20: Blitz20233+2Stockfish (24)Dragon[102]
CCC 20: Rapid202310+3Stockfish (25)Leela Chess Zero[103]
CCC 20: Bullet20231+1Stockfish (26)Torch[104]
CCC 21: Blitz20233+2Stockfish (27)Torch[105]
CCC 21: Rapid202310+3Stockfish (28)Leela Chess Zero[106]
CCC 21: Bullet20231+1Stockfish (29)Torch[107]
CCC 22: Blitz20243+2Stockfish (30)Torch[108]
Bonus
Event Year Time Controls Winner Runner-up Ref
CPU Blitz Madness20203+2Stockfishan older version of Stockfish[109]
Trillion-Node Throwdown III2020150+5StockfishLeela Chess Zero on the CPU[110]
No-Castle II20205+2Stockfishan older version of Stockfish[111]
Bullet Chess is Fun20202+1StockfishLeela Chess Zero[112]
Checkmate in 420203+2StockfishLeela Chess Zero[113]
Odds Ladder20203+2StockfishLeela Chess Zero[114]
Merry Queen Sac20202+1StockfishStoofvlees[115]
Budapest Bullet20202+1Leela Chess ZeroStockfish[116]
King Gambit Madness20215+5StockfishLeela Chess Zero[117]
Drawkiller Update Party20212+1StockfishLeela Chess Zero[118]
To Castle Or Not To Castle II20213+2StockfishLeela Chess Zero[119]
Eco Mega-Match 2 (part 1)20211+1StockfishLeela Chess Zero[120]
Eco Mega-Match 2 (part 2)20211+1StockfishLeela Chess Zero[121]
Caro-Kann Special20215+2StockfishLeela Chess Zero[122]
King's Indian Defense Special202110+2Leela Chess ZeroStockfish[123]
Dutch Defense Special202110+2StockfishLeela Chess Zero[124]
Evans Gambit Madness202110+2Leela Chess ZeroStockfish[125]
Sicilian Najdorf Special202110+2StockfishDragon[126]
Belgian Stew20212+1StockfishLeela Chess Zero[127]
Saragossa20212+1Leela Chess ZeroStockfish[128]
Double Bongcloud, Rapid202110+2Leela Chess ZeroStockfish[129]
The Hillbilly Attack202110+2Leela Chess ZeroDragon[130]
Romantic Openings: Danish Gambit Accepted20213+2StockfishDragon[131]
Romantic Openings: Evans Gambit Accepted20213+2StockfishLeela Chess Zero[132]
Romantic Openings: Urusov Gambit Accepted20215+2StockfishDragon[133]
Romantic Openings: Blackmar-Diemer Gambit20215+2StockfishDragon[134]
Romantic Openings: Stafford Gambit20211+2Leela Chess ZeroStockfish[135]
Romantic Openings: Calabrese Countergambit20215+2StockfishLeela Chess Zero[136]
Romantic Openings: Traxler Counterattack20215+2Leela Chess ZeroStockfish[137]
No Black Castling20225+5StockfishDragon[138]
Draw Killer202215+5StockfishLeela Chess Zero[139]
Romantic Openings: Wing Gambit20225+2StockfishLeela Chess Zero[140]
Chess 324 Bonus20225+2StockfishDragon[141]
Classical Cup #1202330+5StockfishLeela Chess Zero[142]
Rating Brawl: Fall 202320231+1StockfishTorch[143]

PogChamps

See main article: PogChamps. Chess.com has hosted PogChamps, an amateur online tournament featuring Twitch streamers, since 2020. The first PogChamps featured streamers including xQcOW, MoistCr1TiKaL, Ludwig Ahgren, and forsen. New participants from PogChamps 2 included itsHafu and Hafþór Júlíus Björnsson.[144] PogChamps 3, beginning in February 2021, debuted with a wider range of Internet personalities and celebrities, with new competitors including MrBeast, Neekolul, Myth, Pokimane, actor Rainn Wilson, and rapper Logic.[145]

Coaches

Chess.com provides an extensive feature for connecting with professional chess coaches.[146] Users can search for coaches at Chess.com Coaches Club[147] based on rating, language, and availability, and view detailed profiles that include teaching styles, experience, and rates. Coaches include top players like: José Eduardo Martínez Alcántara,[148] Raunak Sadhwani,[149] Benjamin Bok[150] and many more.

See also

Notes and References

  1. Web site: About Chess.com. Chess.com. May 21, 2021.
  2. Web site: Chess.com chooses Azul Zing to enhance real-time gaming experience . . April 26, 2016 . September 4, 2018 . July 6, 2018 . https://web.archive.org/web/20180706051819/http://www.marketwired.com/press-release/chesscom-chooses-azul-zing-to-enhance-real-time-gaming-experience-2118463.htm . live .
  3. Web site: 2007-07-08 . Chess.com: A Social Networking Site For...Well You Can Probably Guess . 2013-11-30 . . en-US.
  4. Web site: Waldstein . David . 2020-03-15 . Think Cheating in Baseball Is Bad? Try Chess . 2021-12-22 . . 0362-4331.
  5. Web site: Team (CHESScom) . Chess com . 2022-12-16 . Chess.com Reaches 100 Million Members . 2024-03-02 . Chess.com . en-US.
  6. News: Richtel . Matt . 2023-04-24 . The Stealth Campaign That's Getting Your Kids Hooked on Chess . 2024-03-12 . The New York Times . en-US . 0362-4331.
  7. Web site: Chess Mentor by Aficionado . dead . https://web.archive.org/web/19970710173638/http://www.chess.com/home.html . July 10, 1997 . November 30, 2013.
  8. Web site: Tomco . Brigham . 2023-01-31 . How two BYU grads launched the world's most popular chess website . 2023-01-31 . . en.
  9. Web site: 2009-12-22 . Chesspark And Chess.com Put Their Pawns Together . 2013-11-30 . . en-US.
  10. Web site: 2013-10-03 . Chess.com to Acquire ChessVibes . 2023-12-19 . Chess Magazine Black & White.
  11. Web site: Peter Doggers . October 3, 2013 . Breaking: Chess.com to acquire ChessVibes . live . https://web.archive.org/web/20180905065252/http://www.chessvibes.com/?q=breaking-chesscom-to-acquire-chessvibes . September 5, 2018 . 2013-11-30 . ChessVibes.
  12. Web site: Chess.com to Acquire ChessVibes . Mike Klein . . October 3, 2013 . September 5, 2018 . January 24, 2020 . https://web.archive.org/web/20200124225807/http://www.uschess.org/content/view/12379/319/ . live .
  13. Web site: Cilento . Pete . 2014-12-15 . Chess.com: 1 Billion Games Served . 2015-01-06 . Chess.com.
  14. Web site: 2016-01-26 . Introducing The New Chess.com (Version 3) . 2018-09-04 . Chess.com.
  15. Angelica Cabral . June 15, 2017 . Chess.com App Crashes on Older Apple Devices After People Played One Game Too Many . . 1091-2339 . September 5, 2018.
  16. Web site: Collins . Keith . 2017-06-14 . A popular chess app inadvertently broke the mathematical limits of older Apple devices . 2018-09-05 . Quartz.
  17. Web site: May 24, 2018 . Chess.com Acquires Komodo; Launches New 'Monte Carlo' Version Similar To AlphaZero . September 4, 2018 . Chess.com.
  18. Web site: May 28, 2018 . Komodo 12 with AlphaZero techniques . September 4, 2018 . Chessbase.
  19. Web site: RS . Prasad . November 18, 2020 . Chess.com acquires broadcast rights for 2021 FIDE World Championship . December 22, 2021 . . en.
  20. Web site: April 24, 2022 . Russia blocks chess website over Ukraine . April 25, 2022 . France 24.
  21. Web site: April 24, 2022 . Роскомнадзор заблокировал самый популярный шахматный сайт chess.com — там заменяли флаг России на статью об Украине . May 2, 2022 . Tjournal.
  22. Web site: Пастух . Юлия . April 17, 2022 . Сергей Карякин призвал РКН заблокировать шахматный сайт chess.com . May 2, 2022 . Oblgazeta.
  23. Web site: February 27, 2022 . On The Invasion Of Ukraine . May 2, 2022 . Chess.com.
  24. Web site: Hallam . Mark . September 27, 2022 . Chess: Carlsen expands on 'cheating' suspicions . September 28, 2022 . Deutsche Welle.
  25. Web site: Chappell . Bill . September 21, 2022 . The cheating scandal roiling the chess world has a new wrinkle . September 28, 2022 . NPR.
  26. Web site: Koebler . Jason . September 28, 2022 . Chess Grandmaster Maxim Dlugy Admitted to Cheating on Chess.com, Emails Show . September 28, 2022 . Vice.
  27. Web site: Morse . Ben . June 28, 2023 . Judge dismisses Hans Niemann's $100 million lawsuit against Magnus Carlsen, among others, in chess cheating scandal . September 28, 2022 . CNN.
  28. Web site: April 27, 2022 . Chess.com Global Championship 2022: All The Information . November 8, 2022 . Chess.com . en-US.
  29. Web site: West . Vanessa . November 7, 2022 . Wesley So Becomes First-Ever Chess.com Global Champion . November 8, 2022 . Chess.com . en-US.
  30. Web site: ICA Offers Free ChessKid Gold Upgrade to K-12 Members . dead . https://web.archive.org/web/20180905023040/http://www.il-chess.org/youthnews/700-chess-kid-membership-offer . September 5, 2018 . September 4, 2018 . Illinois Chess Association.
  31. Web site: Pruess . David . May 31, 2012 . Nation's Top Chess Kids to Battle in Online Invitational . November 30, 2013 . .
  32. Web site: Jordan . Robert . June 15, 2013 . Bay Area kids look to checkmate opponents from a computer screen . dead . https://web.archive.org/web/20141026182809/http://www.contracostatimes.com/ci_23470145/chess-bay-area-kids-look-checkmate-opponents-from . October 26, 2014 . November 30, 2013 . Contra Costa Times.
  33. Web site: ChessKid Gold Membership . dead . https://web.archive.org/web/20180905023244/https://www.northtexaschessacademy.com/product-page/chesskid-com-gold-membership . September 5, 2018 . September 4, 2018 . North Texas Chess Federation.
  34. Web site: Marita . Lene . August 24, 2022 . Chess vil by 13 kroner aksjen for hele Play Magnus Group . . August 26, 2022 . . no.
  35. Web site: Chess.com Officially Acquires Play Magnus, Carlsen Signs As Ambassador . Chess.com . December 23, 2022 . December 21, 2021.
  36. Web site: Kelemen . Luci . August 24, 2022 . Chess.com to acquire Play Magnus Group . August 26, 2022 . Dot Esports.
  37. Web site: Mark Crowther . October 27, 2016 . Carlsen-Nakamura chess.com GM Blitz Battle Final 2016 . September 5, 2018 . The Week in Chess.
  38. Web site: Speed Chess Championship 2023 . chess.com . 2024-01-06.
  39. Web site: GM Blitz Battle Historical Archive . Mike Klein . Chess.com . July 1, 2016 . September 4, 2018 . September 5, 2018 . https://web.archive.org/web/20180905065354/https://www.chess.com/article/view/gm-blitz-battle-historical-archive . live .
  40. Web site: 2017 Speed Chess Championship Schedule, Results, Information . Pete Cilento . Chess.com . May 2, 2017 . September 4, 2018 . April 14, 2019 . https://web.archive.org/web/20190414110237/https://www.chess.com/article/view/2017-speed-chess-championship-information . live .
  41. Web site: Speed Chess Championship 2018 – Official Information . Chess.com . August 18, 2018 . September 4, 2018 . March 28, 2020 . https://web.archive.org/web/20200328150048/https://www.chess.com/article/view/2018-speed-chess-championship-official-schedule-players-prizes-information . live .
  42. News: Nakamura Defeats So To Repeat As Speed Chess Champion . Chess.com . April 20, 2018 . October 22, 2020 . October 8, 2020 . https://web.archive.org/web/20201008050952/https://www.chess.com/article/view/2019-speed-chess-championship . live .
  43. Web site: Nakamura Wins 2020 Speed Chess Championship Final Presented By OnJuno . Chess.com . December 15, 2020 . January 3, 2021 . December 28, 2020 . https://web.archive.org/web/20201228163446/https://www.chess.com/news/view/nakamura-wins-2020-speed-chess-championship . live .
  44. News: Nakamura Wins 2021 Speed Chess Championship Final With Double-Digit Dominance . Chess.com . December 19, 2021 . December 19, 2021 . (Samcopeland) . Sam Copeland . December 20, 2021 . https://web.archive.org/web/20211220000555/https://www.chess.com/news/view/nakamura-wins-speed-chess-championship-final-with-double-digit-dominance . live .
  45. Web site: 2022 Speed Chess Championship Main Event . December 18, 2022.
  46. Web site: Speed Chess Championship 2023 . September 16, 2023.
  47. Web site: Speed Chess Championship 2024 . August 10, 2024.
  48. Web site: 2018 Chess.com Daily Chess Championship. 2018-09-04. chess.com. 2023-11-15.
  49. Web site: 2019 Chess.com Daily Chess Championship. 2019-11-22. chess.com. 2023-11-15.
  50. Web site: 2020 Chess.com Daily Chess Championship. 2020-10-13. chess.com. 2023-11-15.
  51. Web site: 2021 Chess.com Daily Chess Championship. 2022-01-09. chess.com. 2023-11-15.
  52. Web site: 2022 Chess.com Daily Chess Championship. 2022-10-11. chess.com. 2023-11-15.
  53. Web site: 2023 Chess.com Daily Chess Championship. 2023-10-20. chess.com. 2023-11-15.
  54. Web site: 2024 Chess.com Daily Chess Championship. 2023-12-10. chess.com. 2023-12-10.
  55. News: St. Louis Arch Bishops Win Inaugural PRO League Title . Mike Klein . Chess.com . March 26, 2017 . September 5, 2018 . March 27, 2017 . https://web.archive.org/web/20170327230504/https://www.chess.com/news/view/saint-louis-arch-bishops-win-inaugural-pro-league-title-7360 . live .
  56. News: The PRO Chess League Finals: The biggest event in Chess e-sports history . Devanshi Rathi . sportskeeda.com . April 11, 2018 . September 5, 2018 . September 5, 2018 . https://web.archive.org/web/20180905065349/https://www.sportskeeda.com/chess/the-pro-chess-league-finals-the-biggest-event-in-chess-e-sports-history . live .
  57. Web site: Arch Bishops Capture 2nd PRO Chess League Title . Mike Klein . Chess.com . May 8, 2019 . May 26, 2019 . May 6, 2019 . https://web.archive.org/web/20190506183055/https://www.chess.com/news/view/saint-louis-arch-bishops-win-2019-pro-chess-league . live .
  58. Web site: Saint Louis Arch Bishops Win 2020 PRO Chess League . Peter Doggers . Chess.com . Oct 2, 2020 . Jan 6, 2023 .
  59. Web site: PRO Chess League Finals: Russia Wizards Win . Yuriy Krykun . Chess.com . Nov 3, 2021 . Jan 6, 2023 .
  60. Web site: Gotham Knights Beat Shanghai Tigers To Win 2023 Title, Yogis Finish 3rd . Venkatachalam Saravanan . Chess.com . May 17, 2023 . Jan 6, 2023 .
  61. Web site: Lee . John . February 8, 2017 . Safarli Wins Chess.com 'Titled Tuesday' for February . September 5, 2018 . Hot Off The Chess.
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