'''TCEC Season 20''',<br/>
the Top Chess Engine Championship (TCEC) Season 20 from December 01, 2020until February 01, 2021. [[Stockfish|Stockfish 20210113]] defended its TCEC title! In total Stockfish won 14 and lost 8 games, 4 game pairs with both White wins, 10 game pairs in favour to Stockfish - four game pairs won by [[Leela Chess Zero|Leela]].
{| class="wikitable" style="margin: auto;"
! [[#Superfinal|Superfinal]] :
| [[Stockfish|Stockfish 20210113]]
| -
|[[Leela Chess Zero|LCZero 0.27.0d-Tilps-dje-magic_JH.94-100]]!53-47
|}
=Participants=
|
|
| style="text-align:center;" | 4
|
|-
|
| style="text-align:center;" | 1
| style="text-align:center;" | 7
|
|-
|-
| [[Igel]]
! UA<br/>US | [[Volodymyr Shcherbyna]]<br/>[[NNUE]] trained by [[Dietrich KappeVolodymyr Shcherbyna]](IGN-0)
|
|
|
|-
| [[Dragon by KomodoChess|KomodoDragon]]
! US
| [[Don Dailey]], [[Larry Kaufman]], [[Mark Lefler]], et al.
|
|
|
|
|style="text-align:center;" | 3
|
|-
| [[Leela Chess Zero|LCZero]]
! BE/CA/<br/>CH/IN/<br/>AU++| [[Gian-Carlo Pascutto]], [[Gary Linscott]],<br/>[[Alexander Lyashuk]], [[Ankan Banerjee]],<br/>[[Gareth Pearce]] et al.
|
|
|
|
| style="text-align:center;" | 1| style="text-align:center;" | 2
|-
| [[Marvin]]
|
| style="text-align:center;" | 2
| style="text-align:center;" | 8
|
|-
|
|
| style="text-align:center;" | 6
|
|-
|
|
| style="text-align:center;" | 2| style="text-align:center;" | '''1'''
|-
| [[Stoofvlees|Stoofvlees II]]
|
|
| style="text-align:center;" | 5
|
|-
<span id="Premier"></span>
==Premier Division==
* '''[[StockfishTCEC Season 19#Premier|< Prev]] [[TCEC Season 21#Premier|Next >]]'''<br/>* December 26, 2020 - Januráry 15, 2021, timecontrol 60' + 7<nowiki>''</nowiki> <ref>[https://www.tcec-chess.com/archive.html?season=20&div=p&game=1 S20 - Premier Division | TCEC - Computer Chess Broadcast]</ref>{| class="wikitable"! # ! Engine ! Lc! St ! Ko! Al ! Sv! Sc! Et ! ro ! P<span style="font-size: 80%; vertical-align: sub;">56</span>|- style="background-color:#ccffcc;"! 1 | [[Leela Chess Zero|LCZerov0.26.3_T60.66740]]* | style="text-align:center;" | '''x'''| style="text-align:center;" | 01 0½<br/>½1 ½½| style="text-align:center;" | 01 ½1<br/>½1 ½1| style="text-align:center;" | ½1 ½1<br/>½1 ½½| style="text-align:center;" | 1½ 1½<br/>1½ 1½| style="text-align:center;" | ½1 ½1<br/>½1 ½1| style="text-align:center;" | 1½ 1½<br/>½½ 1½| style="text-align:center;" | 10 1½<br/>1½ 1½! 38|- style="background-color:#ccffcc;"! 2 | [[Stockfish|Stockfish 20201225]]| style="text-align:center;" | 10 1½<br/>½0 ½½| style="text-align:center;" | '''x''' | style="text-align:center;" | 10 1½<br/>½½ 1½| style="text-align:center;" | ½1 ½1<br/>½1 ½½| style="text-align:center;" | ½½ ½1<br/>½1 01| style="text-align:center;" | 11 ½½<br/>1½ 1½| style="text-align:center;" | ½1 ½1<br/>½1 ½1| style="text-align:center;" | 11 ½1<br/>½1 ½1! 38|-! 3 | [[Dragon by Komodo Chess|KomodoDragon 2647.00]]| style="text-align:center;" | 10 ½0<br/>½0 ½0| style="text-align:center;" | 01 0½<br/>½½ 0½| style="text-align:center;" | '''x''' | style="text-align:center;" | ½0 1½<br/>1½ ½½| style="text-align:center;" | 01 01<br/>½1 0½| style="text-align:center;" | 1½ 1½<br/>1½ 1½| style="text-align:center;" | ½1 ½1<br/>½1 11| style="text-align:center;" | 1½ 1½<br/>1½ 1½! 32½|-! 4 | [[Allie#AllieStein|AllieSteinv0.8-120f959_net-15.0]] * | style="text-align:center;" | ½0 ½0<br/>½0 ½½| style="text-align:center;" | ½0 ½0<br/>½0 ½½| style="text-align:center;" | ½1 0½<br/>0½ ½½| style="text-align:center;" | '''x''' | style="text-align:center;" | 01 ½1<br/>½1 ½1| style="text-align:center;" | ½½ ½1<br/>½1 ½½| style="text-align:center;" | ½1 ½1<br/>½1 ½1| style="text-align:center;" | 1½ 1½<br/>1½ 1½! 31|-! 5 | [[Stoofvlees|Stoofvlees II a16]]* [[Komodo]]| style="text-align:center;" | 0½ 0½<br/>0½ 0½| style="text-align:center;" | ½½ ½0<br/>½0 10| style="text-align:center;" | 10 10<br/>½0 1½| style="text-align:center;" | 10 ½0<br/>½0 ½0| style="text-align:center;" | '''x''' | style="text-align:center;" | 1½ ½½<br/>½½ 1½| style="text-align:center;" | ½1 01<br/>½1 01| style="text-align:center;" | ½1 ½1<br/>01 ½1! 27|-! 6 * | [[Scorpio#ScorpioNN|ScorpioNN3.0.11]] * | style="text-align:center;" | ½0 ½0<br/>½0 ½0| style="text-align:center;" | 00 ½½<br/>0½ 0½| style="text-align:center;" | 0½ 0½<br/>0½ 0½| style="text-align:center;" | ½½ ½0<br/>½0 ½½| style="text-align:center;" | 0½ ½½<br/>½½ 0½| style="text-align:center;" | '''x''' | style="text-align:center;" | 1½ ½½<br/>10 ½½| style="text-align:center;" | ½½ ½½<br/>1½ 10! 21|- style="background-color:#ffcccc;"! 7 | [[Ethereal|Ethereal TCEC S20 DivP]]* | style="text-align:center;" | 0½ 0½<br/>½½ 0½| style="text-align:center;" | ½0 ½0<br/>½0 ½0| style="text-align:center;" | ½0 ½0<br/>½0 00| style="text-align:center;" | ½0 ½0<br/>½0 ½0| style="text-align:center;" | ½0 10<br/>½0 10| style="text-align:center;" | 0½ ½½<br/>01 ½½| style="text-align:center;" | '''x''' | style="text-align:center;" | ½1 ½1<br/>½½ 01! 19½|- style="background-color:#ffcccc;"! 8 | [[RofChade|rofChade2.309]]| style="text-align:center;" | 01 0½<br/>0½ 0½| style="text-align:center;" | 00 ½0<br/>½0 ½0| style="text-align:center;" | 0½ 0½<br/>0½ 0½| style="text-align:center;" | 0½ 0½<br/>0½ 0½| style="text-align:center;" | ½0 ½0<br/>10 ½0| style="text-align:center;" | ½½ ½½<br/>0½ 01| style="text-align:center;" | ½0 ½0<br/>½½ 10| style="text-align:center;" | '''x'''! 17|}
<span id="Sufi"></span>
=Superfinal=
'''[[TCEC Season 19#Sufi|< Prev]] [[TCEC Season 21#Sufi|Next >]]'''<br/>
January 16, 2020 - February 01, 2021, timecontrol 120'+10"<br/>
{| class="wikitable"
! #
! Engine
! W
! D
! L
! P<span style="font-size: 80%; vertical-align: sub;">100</span>
|-
! 1
| [[Stockfish|Stockfish 20210113]]
| style="text-align:right;" | 14
| style="text-align:right;" | 78
| style="text-align:right;" | 8
! 53
|-
! 2
| [[Leela Chess Zero|LCZero 0.27.0d-Tilps-dje-magic_JH.94-100]]
| style="text-align:right;" | 8
| style="text-align:right;" | 78
| style="text-align:right;" | 14
! 47
|}
=Publications=
* [[Guy Haworth]], [[Nelson Hernandez]] ('''2021'''). ''The 20th Top Chess Engine Championship, TCEC20''. [[ICGA Journal#43_1|ICGA Journal, Vol. 43, No. 1]], [https://tcec-chess.com/articles/TCEC_20.pdf pdf]
* [[Matthew Sadler]] ('''2021'''). ''The TCEC20 Computer Chess Superfinal: a Perspective''. [[ICGA Journal#43_1|ICGA Journal, Vol. 43, No. 1]], [https://tcec-chess.com/articles/Sufi_20_-_Sadler.pdf pdf]
=Forum Posts=
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=76103 Nemorino is surprising everybody in League 1] by Chessqueen, [[CCC]], December 19, 2020 » [[Nemorino]], [[NNUE]]
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=76120 A Thank You, to TCEC] by [[Andrew Grant]], [[CCC]], December 21, 2020
* [https://groups.google.com/d/msg/lczero/Uf10cZWOeeY/y3gn8BaCAAAJ TCEC season 20] by [[Warren D. Smith]], [[Computer Chess Forums|LCZero Forum]], January 14, 2021
=External Links=
