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'''TCEC Season 4''',<br/>
a tournament directed and organized by [[Martin Thoresen]], held from January 22 until April 28, 2013. After the [[TCEC Season 3|break in 2011]], the TCEC Season 4 was initially relaunched as nTCEC Season 1 <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=46861 Official (re)launch of TCEC - website is up!] by [[Martin Thoresen]], [[CCC]], January 12, 2013</ref>. [[Houdini|Houdini 3]] won the [[#Sufi|Superfinal]] versus [[Stockfish|Stockfish 250413]] with 25 - 23.
=Stages=
<span id="Stage1"></span>
==Stage 1==
'''[[TCEC Season 3#Second|< Prev]] [[TCEC Season 5#Stage1|Next >]]'''<br/>
The Season 4, Stage 1 qualifier from January 22 until February 20, 2013, was a seven round [https://en.wikipedia.org/wiki/Swiss-system_tournament Swiss system tournament] with 126 games played <ref>[https://tcec-chess.com/#game=1&season=4&stage=1 Season 4 - Stage 1 | TCEC - Computer Chess Broadcast]</ref>.
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<span id="Stage2"></span>
==Stage 2a==
'''[[TCEC Season 3#First|< Prev]] [[TCEC Season 5#Stage2|Next >]]'''<br/>
Season 4, Stage 2a from February 22 until March 08, 2013 <ref>[https://tcec-chess.com/#game=1&season=4&stage=2a Season 4 - Stage 2a | TCEC - Computer Chess Broadcast]</ref>.
|}
==Stage 2b==
Season 4, Stage 2b from March 11 until March 25, 2013 <ref>[https://tcec-chess.com/#game=1&season=4&stage=2b Season 4 - Stage 2b | TCEC - Computer Chess Broadcast]</ref>.
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<span id="Stage3"></span>
==Stage 3==
'''[[TCEC Season 3|< Prev]] [[TCEC Season 5#Stage3|Next >]]'''<br/>
Season 4, Stage 3 from March 30 until April 11, 2013 <ref>[https://tcec-chess.com/#game=1&season=4&stage=3 Season 4 - Stage 3 | TCEC - Computer Chess Broadcast]</ref>.
|}
<span id="Stage4"></span>
==Stage 4==
'''[[TCEC Season 3|< Prev]] [[TCEC Season 5#Stage4|Next >]]'''<br/>
Season 4, Stage 4 from April 13 until April 23, 2013 <ref>[https://tcec-chess.com/#game=1&season=4&stage=4 Season 4 - Stage 4 | TCEC - Computer Chess Broadcast]</ref>.
<span id="Sufi"></span>
=Superfinal=
'''[[TCEC Season 2#Sufi|< Prev]] [[TCEC Season 5#Sufi|Next >]]'''<br/>
Season 4, Superfinal, April 26 - May 09, 2014, timecontrol 150'+30" <ref>[https://tcec-chess.com/#div=sf&game=1&season=4 Season 4 - Superfinal 1 | TCEC - Computer Chess Broadcast]</ref>
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