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'''TCEC Season 8''',<br/>
=Participants=
|}
* [http://chessprogramming.wikispaces.com/space/statscodes CC Country Codes]
=Stages=<span id="Stage1"></span>==Stage 1== '''[[TCEC Season 7#Stage1|< Prev]] [[TCEC Season 9#Stage1|Next >]]'''<br/>Season 8, Stage 1, August 21, 2015 - September 10, 2015 The top 6 from each of Stage 1A/1B will qualify for Stage 2.===Stage 1a===
{| class="wikitable"
|-
! #
! Engine
! Ko
! Gu
! P<span style="font-size: 80%; vertical-align: sub;">11</span>
! SB
|-style="background-color:#ccffcc;"
! 1
| style="text-align:left;" | [[Komodo|Komodo 9.1]]
| style="text-align:center;" | '''x'''
| style="text-align:center;" | ½
! 9
| style="text-align:center;" | 44½
|-style="background-color:#ccffcc;"
! 2
| style="text-align:left;" | [[Gull|Gull 3]]
| style="text-align:center;" | ½
| style="text-align:center;" | '''x'''
! 8½
| style="text-align:center;" | 40½
|-style="background-color:#ccffcc;"
! 3
| style="text-align:left;" | [[Protector|Protector 1.9]]
| style="text-align:center;" | ½
| style="text-align:center;" | ½
! 7
| style="text-align:center;" | 33¾
|-style="background-color:#ccffcc;"
! 4
| style="text-align:left;" | [[Fire|Fire 5b]]
| style="text-align:center;" | 0
| style="text-align:center;" | ½
! 7
| style="text-align:center;" | 33
|-style="background-color:#ccffcc;"
! 5
| style="text-align:left;" | [[Ginkgo|Ginkgo 1.2]]
| style="text-align:center;" | ½
| style="text-align:center;" | 0
! 7
| style="text-align:center;" | 30
|-style="background-color:#ccffcc;"
! 6
| style="text-align:left;" | [[Texel|Texel 1.06a19]]
| style="text-align:center;" | 0
| style="text-align:center;" | ½
! 7
| style="text-align:left;" | [[Jonny|Jonny 7]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
! 8
| style="text-align:left;" | [[Arasan|Arasan 18]]
| style="text-align:center;" | 0
| style="text-align:center;" | ½
! 9
| style="text-align:left;" | [[Gaviota|Gaviota 1]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
! 10
| style="text-align:left;" | [[Cheng|Cheng4 0.39]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
! 11
| style="text-align:left;" | [[EXchess|EXchess 7.71b]]
| style="text-align:center;" | ½
| style="text-align:center;" | 0
! 12
| style="text-align:left;" | [[Fruit Reloaded|Fruit 200815]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
|}
===Stage 1b===
{| class="wikitable"
|-
! #
! Engine
! St
! Ho
! P<span style="font-size: 80%; vertical-align: sub;">11</span>
! SB
|-style="background-color:#ccffcc;"
! 1
| style="text-align:left;" | [[Stockfish|Stockfish 300815]]
| style="text-align:center;" | '''x'''
| style="text-align:center;" | 1
! 11
| style="text-align:center;" | 55
|-style="background-color:#ccffcc;"
! 2
| style="text-align:left;" | [[Houdini|Houdini 4]]
| style="text-align:center;" | 0
| style="text-align:center;" | '''x'''
! 9
| style="text-align:center;" | 41¼
|-style="background-color:#ccffcc;"
! 3
| style="text-align:left;" | [[Hannibal|Hannibal 300815]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
! 7½
| style="text-align:center;" | 28¾
|-style="background-color:#ccffcc;"
! 4
| style="text-align:left;" | [[Nirvanachess|Nirvana 81715]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
! 7
| style="text-align:center;" | 28½
|-style="background-color:#ffcccc;"
! 5
| style="text-align:left;" | [[Equinox|Equinox 3.30]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
! 6½
| style="text-align:center;" | 26¼
|-style="background-color:#ccffcc;"
! 6
| style="text-align:left;" | [[Chiron|Chiron 2]]
| style="text-align:center;" | 0
| style="text-align:center;" | ½
! 6
| style="text-align:center;" | 25¼
|-style="background-color:#ffcccc;"
! 7
| style="text-align:left;" | [[Junior|Junior 13.8]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
! 4½
| style="text-align:center;" | 14
|-style="background-color:#ccffcc;"
! 8
| style="text-align:left;" | [[The Baron|The Baron 3.40a]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
! 9
| style="text-align:left;" | [[Nightmare NL|Nightmare 7.98]]
| style="text-align:center;" | 0
| style="text-align:center;" | ½
! 10
| style="text-align:left;" | [[Scorpio|Scorpio 2.77]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
! 11
| style="text-align:left;" | [[Crafty|Crafty 24.1]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
! 12
| style="text-align:left;" | [[Pedone|Pedone 1.3]]
| style="text-align:center;" | 0
| style="text-align:center;" | 0
* SB: [https://en.wikipedia.org/wiki/Sonneborn-Berger_score Sonneborn-Berger score]
Due to the severe problems with <span style="background-color: #ff0000ffcccc;">crashes</span>, three engines will not be allowed in further stages. [[Junior]], [[Pedone]], and [[Equinox]] will not move on even if top 6, as the frequent crashes create both extra work for [[Martin Thoresen]] and discontent in the audience <ref>[https://www.facebook.com/tcec.chess?fref=nf TCEC - Thoresen Chess Engines Competition | Facebook], September 09, 2015</ref> .<span id="Stage2"></span>==Stage 2= ='''[[TCEC Season 7#Stage2|< Prev]] [[TCEC Season 9#Stage2|Next >]]'''<br/> Season 8, Stage 2, September 12, 2015 - October 08, 2015. Double round-robin, using a two-move book designed by [[Adam Hair]] and checked by [[Nelson Hernandez]] for statistical and evaluative play-balance. The top 6 will qualify for Stage 3.
{| class="wikitable"
|-
! #
! Engine
! Ko
! St
! P<span style="font-size: 80%; vertical-align: sub;">22</span>
! SB
|-style="background-color:#ccffcc;"
! 1
| style="text-align:left;" | [[Komodo|Komodo 9.2]]
| style="text-align:center;" |
| style="text-align:center;" | ½½
! 18½
| style="text-align:center;" | 182¾
|-style="background-color:#ccffcc;"
! 2
| style="text-align:left;" | [[Stockfish|Stockfish 070915]]
| style="text-align:center;" | ½½
| style="text-align:center;" |
! 16½
| style="text-align:center;" | 163¾
|-style="background-color:#ccffcc;"
! 3
| style="text-align:left;" | [[Houdini|Houdini 4]]
| style="text-align:center;" | 00
| style="text-align:center;" | ½0
! 13½
| style="text-align:center;" | 120¼
|-style="background-color:#ccffcc;"
! 4
| style="text-align:left;" | [[Gull|Gull 3]]
| style="text-align:center;" | ½½
| style="text-align:center;" | ½½
! 13
| style="text-align:center;" | 129½
|-style="background-color:#ccffcc;"
! 5
| style="text-align:left;" | [[Protector|Protector R1076]]
| style="text-align:center;" | 00
| style="text-align:center;" | 0½
! 11½
| style="text-align:center;" | 109
|-style="background-color:#ccffcc;"
! 6
| style="text-align:left;" | [[Hannibal|Hannibal 080915]]
| style="text-align:center;" | ½0
| style="text-align:center;" | ½0
! 7
| style="text-align:left;" | [[Ginkgo|Ginkgo 1.3]]
| style="text-align:center;" | 00
| style="text-align:center;" | 00
! 8
| style="text-align:left;" | [[Texel|Texel 1.06a19]]
| style="text-align:center;" | ½0
| style="text-align:center;" | 00
! 9
| style="text-align:left;" | [[Nirvanachess|Nirvana 91015]]
| style="text-align:center;" | 00
| style="text-align:center;" | ½½
! 10
| style="text-align:left;" | [[Fire|Fire 5b]]
| style="text-align:center;" | ½0
| style="text-align:center;" | 0½
! 11
| style="text-align:left;" | [[Chiron|Chiron 2]]
| style="text-align:center;" | 00
| style="text-align:center;" | 0½
! 12
| style="text-align:left;" | [[The Baron|The Baron 3.40a]]
| style="text-align:center;" | 00
| style="text-align:center;" | 00
|}
* SB: [https://en.wikipedia.org/wiki/Sonneborn-Berger_score Sonneborn-Berger score]
<span id="Stage3"></span>==Stage 3= = '''[[TCEC Season 7#Stage3|< Prev]] [[TCEC Season 9#Stage3|Next >]]'''<br/> Season 8, Stage 3, October 08, 2015 - October 28, 2015. The format for Stage 3 is a hexa round robin (x 6) so that each engine will play both sides of the same opening against each other, three times. After Stage 3 has finished, the top 2 engines will meet in a Superfinal of 100 games.
{| class="wikitable"
! #
! Engine
! Komodo
! Stockfish
! P<span style="font-size: 80%; vertical-align: sub;">30</span>
! SB
|-style="background-color:#ccffcc;"
! 1
| style="text-align:left;" | [[Komodo|Komodo 1501.01]]
| style="text-align:center;" | ······
| style="text-align:center;" | ½½½½½½
! 20½
| style="text-align:center;" | 275¼
|-style="background-color:#ccffcc;"
! 2
| style="text-align:left;" | [[Stockfish|Stockfish 070915]] <ref>Game 1 to 15 Stockfish 071015, then reverted to former version, see [http://www.chessdom.com/press-release-regarding-the-stockfish-case-in-tcec-stage-3/ Press release regarding the Stockfish case in TCEC Stage 3], October 11, 2015</ref>
| style="text-align:center;" | ½½½½½½
| style="text-align:center;" | ······
! 3
| style="text-align:left;" | [[Gull|Gull 3]]
| style="text-align:center;" | ½½½00½
| style="text-align:center;" | 1½½½0½
! 4
| style="text-align:left;" | [[Houdini|Houdini 4]]
| style="text-align:center;" | 1½½0½0
| style="text-align:center;" | 000½0½
! 5
| style="text-align:left;" | [[Hannibal|Hannibal 071015]]
| style="text-align:center;" | 0½00½½
| style="text-align:center;" | 0½00½1
! 6
| style="text-align:left;" | [[Protector|Protector R1091]]
| style="text-align:center;" | 00½000
| style="text-align:center;" | 1½½0½0
! #
! Engine
! Ko
! St
! P<span style="font-size: 80%; vertical-align: sub;">30</span>
! SB
|-style="background-color:#ccffcc;"
! 1
| style="text-align:left;" | [[Komodo|Komodo 1501.01]]
| style="text-align:center;" |
| style="text-align:center;" | 3
! 20½
| style="text-align:center;" | 275¼
|-style="background-color:#ccffcc;"
! 2
| style="text-align:left;" | [[Stockfish|Stockfish 070915]]
| style="text-align:center;" | 3
| style="text-align:center;" |
! 3
| style="text-align:left;" | [[Gull|Gull 3]]
| style="text-align:center;" | 2
| style="text-align:center;" | 3
! 4
| style="text-align:left;" | [[Houdini|Houdini 4]]
| style="text-align:center;" | 2½
| style="text-align:center;" | 1
! 5
| style="text-align:left;" | [[Hannibal|Hannibal 071015]]
| style="text-align:center;" | 1½
| style="text-align:center;" | 2
! 6
| style="text-align:left;" | [[Protector|Protector R1091]]
| style="text-align:center;" | ½
| style="text-align:center;" | 2½
=Superfinal=
'''[[TCEC Season 7#Superfinal|< Prev]] [[TCEC Season 9#Superfinal|Next >]]'''<br/>
The Season 8 Superfinal between [[Stockfish|Stockfish 021115]] and [[Komodo|Komodo 9.3x]] was played from November 06 until November 30, 2015 with 50 different 8 move openings selected by IM [https://en.wikipedia.org/wiki/Erik_Kislik Erik Kislik], of which 33 are his own and the remaining 17 are made by [[Nelson Hernandez|Cato]]. Each engine played both the black and white side of the same position. '''Komodo''' dominated the match and secured the '''title''' five games before the end of the hundred games marathon <ref>[http://www.chessdom.com/komodo-is-triple-champion-wins-the-top-chess-engine-championship-2015/ Komodo is triple champion, wins the Top Chess Engine Championship 2015!], [[Chessdom]], November 29, 2015</ref> .{| class="wikitable"! # ! Engine ! W! D! L! P<span style="font-size: 80%; vertical-align: sub;">100</span>|- ! 1| [[Komodo|Komodo 9.3x]]| style="text-align:right;" | 9| style="text-align:right;" | 89| style="text-align:right;" | 2! 53½|-! 2| [[Stockfish|Stockfish 021115]]| style="text-align:right;" | 2| style="text-align:right;" | 89| style="text-align:right;" | 9! 46½ |}
{| class="wikitable"