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'''[[Main Page|Home]] * [[Engines]] * Protector'''
[[FILE:042 Dharma Protector (9228057604).jpg|border|right|thumb| [https://en.wikipedia.org/wiki/Dharmapala Dharma Protector] <ref>[https://en.wikipedia.org/wiki/Dharmapala Dharma Protector], [https://en.wikipedia.org/wiki/Mahabodhi_Temple Mahabodhi Temple], [https://en.wikipedia.org/wiki/Bodh_Gaya Bodh Gaya] <ref>, [https://www.flickr.com/photos/anandajoti/9228057604/ Flickr Image] by [https://www.flickr.com/people/64337707@N07 Anandajoti Bhikkhu], [https://en.wikipedia.org/wiki/Penang Penang], [https://en.wikipedia.org/wiki/Malaysia Malaysia], March 16, 2013, [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> ]]
'''Protector''',<br/>
an [[UCI]] compliant [[:Category:Open Source|open source chess engine]] written by [[Raimund Heid]] in [[C]], distributed under the [[Free Software Foundation#GPL|GNU General Public License GPL]]. Protector already started its life in early 2000 <ref>[http://www.schach-welt.de/schach/computerschach/interviews/raimund-heid Interview] with [[Raimund Heid]], by [[Frank Quisinsky]], [http://www.schach-welt.de/ Schachwelt.de], February 20, 2010 (German)</ref> , and over the time incorporated many public ideas and techniques known from other open source programs, notably [[Crafty]], [[Fruit]], [[Toga]], [[Glaurung]]/[[Stockfish]] and [[RobboLito]]. It can be compiled to run under [[Windows]], [[Linux]] and [[Mac OS]]. Protector is incorporated in the cluster chess project [[GridProtector]] by [[Kai Himstedt]] which had its debut at [[PT 49]].
=Tournament Play=
Protector participated at the [[TCEC Season 6]], the [[TCEC Season 7]], and over the board the [[WCCC 2015]] and [[WCSC 2015]] in [[Leiden University|Leiden]], operated by [[Timo Haupt]], who was also responsible for the [[Opening Book|book lines]]. At the WCCC, Protector played strongly and shared the third place with [[HiarcsHIARCS]] with 5/8, only losing from [[Komodo]]. At the uniform hardware WCSC Protector also shared the third place, now with Komodo, both 4½/7, behind [[Shredder]] and [[Ginkgo]].
=Photos & Games=
==WCSC 2015==
[[FILE:ProtectorHiarcsWCSC2015.JPG|none|border|text-bottom|link=WCSC 2015]]
[[WCSC 2015]], round 2, [[Harvey Williamson]] and [[Timo Haupt]] in [[Protector]] vs. [[HiarcsHIARCS]] waiting for 20.Qa8+
<pre>
[Event "WCSC 2015"]
[Round "2.4"]
[White "Protector"]
[Black "HiarcsHIARCS"]
[Result "1/2-1/2"]
=Acknowledgment=
Protector is based on many great ideas from the following people: [[Fabien Letouzey]] (pvnodes, [[Tapered Eval|blending of opening and endgame values]], eval params), [[Thomas Gaksch]] ([[PV Extensions|pvnode extensions]], [[Futility Pruning#Extendedfutilitypruning|extended futility pruning]], space attack eval), [[Robert Hyatt]] ([[Shared Hash Table#Lockless|consistent hashtable entries]]), [[Stefan Meyer-Kahlen]] ([[UCI]]), [[Gerd Isenberg]] <ref>Thank you! ([[Gerd Isenberg]], March 16, 2013) My own contribution to [[Magic Bitboards]] was the line-wise forerunner, dubbed [[Kindergarten Bitboards]], also tried with "random" factors, while [[Lasse Hansen]] had the idea to hash both lines simultaneously. I was initially skeptical whether the huge tables pay off.</ref> /[[Lasse Hansen]] ([[Magic Bitboards|magic bitboards]]), [[Marco Costalba]]/[[Tord Romstad]]/[[Joona Kiiski]] ([[Glaurung]]/[[Stockfish]] sources), [[Ippolit|Igor/Yakov]] ([[RobboLito]] sources), [[Andrew Kadatch]]/[[Eugene Nalimov]] ([[Endgame Tablebases|endgame tablebases]]), Frank Rahde (testing) and Wolf Stephan Kappesser (Adaptations for [[Mac OS]]). Without their contributions Protector would not be what it is. Thank you so much.
* [https://en.wikipedia.org/wiki/Protectorate Protectorate from Wikipedia]
* [https://en.wikipedia.org/wiki/Protection Protection (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Dharmapala Dharmapala from Wikipedia]* [https://en.wikipedia.org/wiki/Citipati_(Buddhism) Citipati from Wikipedia]* [https://en.wikipedia.org/wiki/Iron_Savior Iron Savior] - Protector, [https://en.wikipedia.org/wiki/Condition_Red_(Iron_Savior_album) Condition Red] (2002), [https://en.wikipedia.org/wiki/YouTube YouTube] Video : {{#evu:https://www.youtube.com/watch?v=mBTjQKSfqt8|alignment=left|valignment=top}}
=References=
[[Category:GPL]]
[[Category:UCI]]
[[Category:Mac]]
[[Category:Comics]]
[[Category:Fiction]]
[[Category:Metaphysics]]
[[Category:Music]]
