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'''TCEC Season 21''',<br/>
the Top Chess Engine Championship (TCEC) Season 21 from May 10until August 07, 2021.[[Stockfish|Stockfish 14_202107131735]] won the [[#Superfinal|Superfinal]] versus [[Leela Chess Zero|LCZero 0.28-dev+_69626]]. {| class="wikitable" style="margin: auto;"! [[#Superfinal|Superfinal]] :| [[Stockfish|Stockfish 14_202107131735]]| - | [[Leela Chess Zero|LCZero 0.28-dev+_69626]]! 56-44 |}
=Participants=
! [[#First|1]]
! [[#Premier|P]]
! [[#Superfinalfinals|SufiFinals]]
|-
|-
|
| style="text-align:center;" | 3
| style="text-align:center;" | 3
|-
| [[Leela Chess Zero|LCZero]]
|
| style="text-align:center;" | 2
| style="text-align:center;" | 2
|-
| [[Marvin]]
|
| style="text-align:center;" | 1
| style="text-align:center;" | '''1'''
|-
| [[Stoofvlees]]
|
| style="text-align:center;" | 4
| style="text-align:center;" | 4
|-
| [[TomitankChess|tomitankChess]]
! 18
|}
<span id="finals"></span>
=Finals=
<span id="Infra"></span>
==Infrafinal==
'''[[TCEC Season 22#Infra|Next >]]'''<br/>
A 50 games head to head contest between the 3rd and 4th place of the [[#Premier|Premier Division]] to determine the 3rd finishing engine of the TCEC Season 21, from July 12 to July 18, 2021. Timecontrol 90' + 9'' <ref>[https://tcec-chess.com/#div=if&game=1&season=21 S21 - Infrafinal | TCEC - Computer Chess Broadcast]</ref>.
==Superfinal==
'''[[TCEC Season 20#Sufi|< Prev]] [[TCEC Season 22#Sufi|Next >]]'''<br/>
July 21 20 - ... August 07, 2021, timecontrol 120'+10" <ref>[https://tcec-chess.com/#div=sf&game=1&season=21 S21 - Superfinal | TCEC - Computer Chess Broadcast]</ref><br/> {| class="wikitable"! # ! Engine ! W! D! L! P<span style="font-size: 80%; vertical-align: sub;">100</span>|- ! 1| [[Stockfish|Stockfish 14_202107131735]]| style="text-align:right;" | 19| style="text-align:right;" | 74| style="text-align:right;" | 7! 56 |-! 2| [[Leela Chess Zero|LCZero 0.28-dev+_69626]]| style="text-align:right;" | 7| style="text-align:right;" | 74| style="text-align:right;" | 19! 44 |} After round 91 on August 05, 2021, [[Stockfish|Stockfish 14_202107131735]] had already 50½.
=Publications=* [[Leela Chess Zero|LCZero 0Matthew Sadler]] ('''2021'''). ''TCEC Season 21 SuperFinal Review''.28[https://tcec-dev+_69626]] chess.com/articles/Sufi_21_- [[Stockfish|Stockfish 14_202107131735]_Sadler.pdf pdf]
=Postings=
* [https://www.chessdom.com/booot-kicks-into-high-gear-wins-tcec-s21-l4/ Booot kicks into high gear, wins TCEC S21 L4], [[Chessdom]], May 25, 2021
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=77503 will Tcec allow Stockfish with a Leela net to play?] by Wilson, [[CCC]], June 17, 2021
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=77908 TCEC21 is over] by Kanizsa, [[CCC]], August 08, 2021
=External Links=
* [https://wiki.chessdom.org/TCEC_Leagues_Season_21 TCEC Leagues Season 21 - TCEC wiki]
* [https://en.wikipedia.org/wiki/TCEC_Season_21 TCEC Season 21 from Wikipedia]
* [https://www.youtube.com/channel/UCq06gd_5HTiG8IIu5-enWyA Silicon Road] by [[Matthew Sadler]], [https://en.wikipedia.org/wiki/YouTube YouTube]Videos
=References=
