25,161
edits
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Created page with "'''Home * Engines * Protector''' FILE:042 Dharma Protector (9228057604).jpg|border|right|thumb| [https://en.wikipedia.org/wiki/Dharmapala Dharma Protector..."
'''[[Main Page|Home]] * [[Engines]] * Protector'''
[[FILE:042 Dharma Protector (9228057604).jpg|border|right|thumb| [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/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 [[Hiarcs]] 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=
==WCCC 2015==
[[FILE:MaverickProtectorWCCC2015.JPG|none|border|text-bottom|link=WCCC 2015]]
[[WCCC 2015]], round 2, [[Steve Maughan]] and [[Timo Haupt]] in [[Maverick]] vs. [[Protector]] <ref>[[WCCC 2015]] and [[WCSC 2015]] photos by [[Gerd Isenberg]]</ref>
<pre>
[Event "WCCC 2015"]
[Site "Leiden, The Netherlands"]
[Date "2015.06.29"]
[Round "2.2"]
[White "Maverick"]
[Black "Protector"]
[Result "0-1"]
1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 dxc4 5.Bg2 a6 6.O-O Nc6 7.e3 Bd7 8.Nc3 Bd6 9.Qe2 b5
10.e4 e5 11.dxe5 Nxe5 12.Nxe5 Bxe5 13.f4 Bxc3 14.bxc3 c6 15.Be3 O-O 16.Bc5 Bg4
17.Qc2 Re8 18.Bd4 Rb8 19.h3 Bc8 20.Rad1 Qe7 21.Be5 Rb7 22.Bd6 Qd8 23.Bc5 Rd7 24.Bd4
Qc7 25.Bxf6 gxf6 26.Rxd7 Qxd7 27.Rd1 Qe7 28.Qe2 Rd8 29.Rxd8+ Qxd8 30.Bf1 Qb6+ 31.Kh2
c5 32.f5 Qd6 33.h4 Qe5 34.Qc2 Bb7 35.Bg2 b4 36.cxb4 c3 37.bxc5 Qxc5 38.Kh3 Bc6
39.h5 Qd4 40.Bf3 Ba4 41.Qc1 Qd2 42.Qxd2 cxd2 43.h6 d1=Q 44.Bxd1 Bxd1 45.Kg2 Kf8
46.Kf2 Ke7 47.Ke3 Kd6 48.Kd4 Be2 49.Kc3 Ke5 0-1
</pre>
==WCSC 2015==
[[FILE:ProtectorHiarcsWCSC2015.JPG|none|border|text-bottom|link=WCSC 2015]]
[[WCSC 2015]], round 2, [[Harvey Williamson]] and [[Timo Haupt]] in [[Protector]] vs. [[Hiarcs]] waiting for 20.Qa8+
<pre>
[Event "WCSC 2015"]
[Site "Leiden, The Netherlands"]
[Date "2015.07.04"]
[Round "2.4"]
[White "Protector"]
[Black "Hiarcs"]
[Result "1/2-1/2"]
1.d4 Nf6 2.c4 c6 3.Nc3 d5 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.O-O a6
10.e4 c5 11.d5 Qc7 12.dxe6 fxe6 13.Bc2 Bd6 14.Ng5 Nf8 15.f4 O-O-O 16.Qe2 h6 17.Nf3 Bxf4
18.e5 Bxf3 19.Qxf3 Bxe5 20.Qa8+ Kd7 21.Qxa6 b4 22.Nb5 Qc6 23.Rd1+ Nd5 24.Rxd5+ exd5
25.Bf5+ Ne6 26.Qa7+ Kc8 27.Qe7 Kb8 28.Qa7+ Kc8 29.Bd2 Rhe8 30.Re1 g6 31.Bg4 h5 32.Bh3
Qxb5 33.Rxe5 Rd6 34.Bf4 Kd8 35.Bg3 Qd7 36.Bh4+ Kc8 37.Qa8+ Kc7 38.Qa7+ Kc8 39.Qa8+ Kc7
40.Qa7+ Kc6 41.Qa6+ Kc7 42.Qa7+ 1/2-1/2
</pre>
=Description=
==Move Generation==
Protector is [[Bitboards|bitboard]] based and applies [[Lasse Hansen|Lasse Hansen's]] [[Magic Bitboards#Plain|plain magic bitboards]] to determine [[Sliding Piece Attacks|sliding piece attacks]]. [[Move Generation#Staged|Staged move generation]] considers [[PV-Move|PV-]] and [[Hash Move|hash move]], winning [[Captures|captures]] and up to four [[Killer Move|killers]] early, and otherwise [[Move Ordering|orders]] captures by [[Static Exchange Evaluation|SEE]] and quiet moves by the [[History Heuristic|history heuristic]] and various static move properties.
==Search==
Protector uses a pool of [[Thread|threads]] to perform a [[Parallel Search|parallel search]] loosely synchronized by a [[Shared Hash Table|shared hash table]]. The serial [[Principal Variation Search|principal variation search]] with [[Null Move Pruning|null move pruning]] and [[Null Move Pruning#ZugzwangVerification|verification]], [[Razoring|razoring]], [[Futility Pruning|futility pruning]], [[Late Move Reductions|late move reductions]], [[Internal Iterative Deepening|IID]], [[Check Extensions|check-]] and [[Singular Extensions#RestrictedSE|restricted singular extensions]] is embedded inside the common [[Iterative Deepening|iterative deepening]] frame with [[Aspiration Windows|aspiration]].
==Evaluation==
The [[Evaluation|evaluation]] caches [[Pawn Hash Table|pawn structure]] and [[King Safety|king safety]] stuff in thread local [[Hash Table|hash tables]]. Opening and endgame scores of various features are computed and aggregated speculatively and finally interpolated by a [[Tapered Eval|tapered eval]] on the current game phase.
=Acknowledgment=
from Protector's readme.txt file <ref>[http://protector.svn.sourceforge.net/viewvc/protector/Readme.txt?revision=428&view=markup SourceForge.net Repository - [protector] Contents of /Readme.txt]</ref>
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.
=See also=
* [[GridProtector]]
=Forum Posts=
==2009==
* [http://www.computerchess.info/tdbb/phpBB3/viewtopic.php?f=9&t=394 Protector - new UCI engine] by [[Denis Mendoza|Denis P. Mendoza]], [[Computer Chess Forums|Toga Developers Discussion Board]], August 12, 2009
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=50337 Found 2 New Engines: Protector and BDI Chess] by [[Swaminathan Natarajan|Swaminathan]], [[Computer Chess Forums|Winboard Forum]], August 16, 2009
* [http://wbec-ridderkerk.forumotion.com/t398-protector-127 Protector 1.2.7] by [[Patrick Buchmann]], [[WBEC|WBEC-Ridderkerk Forum]], August 27, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=29581&start=6 Re:Original project] by [http://www.talkchess.com/forum/profile.php?mode=viewprofile&u=881 Ruxy Sylwyka], [[CCC]], August 29, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=29978 What was the verdict on Protector 1.2.7?] by [[Graham Banks]], [[CCC]], October 03, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=30271 Protector 1.2.9 executables with egtb access] by [[Volker Pittlik]], [[CCC]], October 22, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=30797 Protector 1.3.2 released] by [[Graham Banks]], [[CCC]], November 26, 2009
==2010 ...==
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=50836 Protector] by [[Olivier Deville]], [[Computer Chess Forums|Winboard Forum]], March 04, 2010
* [http://www.talkchess.com/forum/viewtopic.php?t=47037 Protector 1.5 is coming!] by [[Jesús Muñoz]], [[CCC]], January 29, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=50583 Unofficial Protector 1.6] by [[Jose Maria Velasco|Jose Mº Velasco]], [[CCC]], December 21, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=53772 Protector 1.7.0 is released...] by [[Dr.Wael Deeb]], [[CCC]], September 21, 2014
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=56432 Protector 1.8.0 ?!] by [[Frank Quisinsky]], [[CCC]], May 20, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=56506 Protector 1.8.0 officially released] by [[Graham Banks]], [[CCC]], May 27, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=58343 Protector 1.9 Available for the Mac] by [[Michael Byrne|Michael B]], [[CCC]], November 24, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=58786 Re-release Protector 1.9 for the Mac] by [[Michael Byrne|Michael B]], [[CCC]], January 02, 2016
=External Links=
==Chess Engine==
* [http://sourceforge.net/projects/protector/ Protector | Free software downloads] at [https://en.wikipedia.org/wiki/SourceForge SourceForge]
* [https://www.game-ai-forum.org/icga-tournaments/program.php?id=803 Protector's ICGA Tournaments]
* [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)
* [http://www.computerchess.org.uk/ccrl/4040/cgi/compare_engines.cgi?family=Protector&print=Rating+list&print=Results+table&print=LOS+table&print=Ponder+hit+table&print=Eval+difference+table&print=Comopp+gamenum+table&print=Overlap+table&print=Score+with+common+opponents Protector] in [[CCRL|CCRL 40/40]]
==Misc==
* [http://en.wiktionary.org/wiki/protector protector - Wiktionary]
* [https://en.wikipedia.org/wiki/Protector Protector (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Protector_(DC_Comics) Protector (DC Comics) from Wikipedia]
* [https://en.wikipedia.org/wiki/Protector_(Marvel_Comics) Protector (Marvel Comics) from Wikipedia]
* [https://en.wikipedia.org/wiki/Protectors_(comics) Protectors (comics) from Wikipedia]
* [https://en.wikipedia.org/wiki/Protector_%28novel%29 Protector (novel) from Wikipedia]
* [https://en.wikipedia.org/wiki/Protector_(title) Protector (title) from Wikipedia]
* [https://en.wikipedia.org/wiki/Pak_Protector Pak Protector from Wikipedia]
* [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]]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:GPL]]
[[Category:UCI]]
[[Category:Comics]]
[[Category:Fiction]]
[[Category:Metaphysics]]
[[FILE:042 Dharma Protector (9228057604).jpg|border|right|thumb| [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/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 [[Hiarcs]] 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=
==WCCC 2015==
[[FILE:MaverickProtectorWCCC2015.JPG|none|border|text-bottom|link=WCCC 2015]]
[[WCCC 2015]], round 2, [[Steve Maughan]] and [[Timo Haupt]] in [[Maverick]] vs. [[Protector]] <ref>[[WCCC 2015]] and [[WCSC 2015]] photos by [[Gerd Isenberg]]</ref>
<pre>
[Event "WCCC 2015"]
[Site "Leiden, The Netherlands"]
[Date "2015.06.29"]
[Round "2.2"]
[White "Maverick"]
[Black "Protector"]
[Result "0-1"]
1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 dxc4 5.Bg2 a6 6.O-O Nc6 7.e3 Bd7 8.Nc3 Bd6 9.Qe2 b5
10.e4 e5 11.dxe5 Nxe5 12.Nxe5 Bxe5 13.f4 Bxc3 14.bxc3 c6 15.Be3 O-O 16.Bc5 Bg4
17.Qc2 Re8 18.Bd4 Rb8 19.h3 Bc8 20.Rad1 Qe7 21.Be5 Rb7 22.Bd6 Qd8 23.Bc5 Rd7 24.Bd4
Qc7 25.Bxf6 gxf6 26.Rxd7 Qxd7 27.Rd1 Qe7 28.Qe2 Rd8 29.Rxd8+ Qxd8 30.Bf1 Qb6+ 31.Kh2
c5 32.f5 Qd6 33.h4 Qe5 34.Qc2 Bb7 35.Bg2 b4 36.cxb4 c3 37.bxc5 Qxc5 38.Kh3 Bc6
39.h5 Qd4 40.Bf3 Ba4 41.Qc1 Qd2 42.Qxd2 cxd2 43.h6 d1=Q 44.Bxd1 Bxd1 45.Kg2 Kf8
46.Kf2 Ke7 47.Ke3 Kd6 48.Kd4 Be2 49.Kc3 Ke5 0-1
</pre>
==WCSC 2015==
[[FILE:ProtectorHiarcsWCSC2015.JPG|none|border|text-bottom|link=WCSC 2015]]
[[WCSC 2015]], round 2, [[Harvey Williamson]] and [[Timo Haupt]] in [[Protector]] vs. [[Hiarcs]] waiting for 20.Qa8+
<pre>
[Event "WCSC 2015"]
[Site "Leiden, The Netherlands"]
[Date "2015.07.04"]
[Round "2.4"]
[White "Protector"]
[Black "Hiarcs"]
[Result "1/2-1/2"]
1.d4 Nf6 2.c4 c6 3.Nc3 d5 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.O-O a6
10.e4 c5 11.d5 Qc7 12.dxe6 fxe6 13.Bc2 Bd6 14.Ng5 Nf8 15.f4 O-O-O 16.Qe2 h6 17.Nf3 Bxf4
18.e5 Bxf3 19.Qxf3 Bxe5 20.Qa8+ Kd7 21.Qxa6 b4 22.Nb5 Qc6 23.Rd1+ Nd5 24.Rxd5+ exd5
25.Bf5+ Ne6 26.Qa7+ Kc8 27.Qe7 Kb8 28.Qa7+ Kc8 29.Bd2 Rhe8 30.Re1 g6 31.Bg4 h5 32.Bh3
Qxb5 33.Rxe5 Rd6 34.Bf4 Kd8 35.Bg3 Qd7 36.Bh4+ Kc8 37.Qa8+ Kc7 38.Qa7+ Kc8 39.Qa8+ Kc7
40.Qa7+ Kc6 41.Qa6+ Kc7 42.Qa7+ 1/2-1/2
</pre>
=Description=
==Move Generation==
Protector is [[Bitboards|bitboard]] based and applies [[Lasse Hansen|Lasse Hansen's]] [[Magic Bitboards#Plain|plain magic bitboards]] to determine [[Sliding Piece Attacks|sliding piece attacks]]. [[Move Generation#Staged|Staged move generation]] considers [[PV-Move|PV-]] and [[Hash Move|hash move]], winning [[Captures|captures]] and up to four [[Killer Move|killers]] early, and otherwise [[Move Ordering|orders]] captures by [[Static Exchange Evaluation|SEE]] and quiet moves by the [[History Heuristic|history heuristic]] and various static move properties.
==Search==
Protector uses a pool of [[Thread|threads]] to perform a [[Parallel Search|parallel search]] loosely synchronized by a [[Shared Hash Table|shared hash table]]. The serial [[Principal Variation Search|principal variation search]] with [[Null Move Pruning|null move pruning]] and [[Null Move Pruning#ZugzwangVerification|verification]], [[Razoring|razoring]], [[Futility Pruning|futility pruning]], [[Late Move Reductions|late move reductions]], [[Internal Iterative Deepening|IID]], [[Check Extensions|check-]] and [[Singular Extensions#RestrictedSE|restricted singular extensions]] is embedded inside the common [[Iterative Deepening|iterative deepening]] frame with [[Aspiration Windows|aspiration]].
==Evaluation==
The [[Evaluation|evaluation]] caches [[Pawn Hash Table|pawn structure]] and [[King Safety|king safety]] stuff in thread local [[Hash Table|hash tables]]. Opening and endgame scores of various features are computed and aggregated speculatively and finally interpolated by a [[Tapered Eval|tapered eval]] on the current game phase.
=Acknowledgment=
from Protector's readme.txt file <ref>[http://protector.svn.sourceforge.net/viewvc/protector/Readme.txt?revision=428&view=markup SourceForge.net Repository - [protector] Contents of /Readme.txt]</ref>
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.
=See also=
* [[GridProtector]]
=Forum Posts=
==2009==
* [http://www.computerchess.info/tdbb/phpBB3/viewtopic.php?f=9&t=394 Protector - new UCI engine] by [[Denis Mendoza|Denis P. Mendoza]], [[Computer Chess Forums|Toga Developers Discussion Board]], August 12, 2009
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=50337 Found 2 New Engines: Protector and BDI Chess] by [[Swaminathan Natarajan|Swaminathan]], [[Computer Chess Forums|Winboard Forum]], August 16, 2009
* [http://wbec-ridderkerk.forumotion.com/t398-protector-127 Protector 1.2.7] by [[Patrick Buchmann]], [[WBEC|WBEC-Ridderkerk Forum]], August 27, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=29581&start=6 Re:Original project] by [http://www.talkchess.com/forum/profile.php?mode=viewprofile&u=881 Ruxy Sylwyka], [[CCC]], August 29, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=29978 What was the verdict on Protector 1.2.7?] by [[Graham Banks]], [[CCC]], October 03, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=30271 Protector 1.2.9 executables with egtb access] by [[Volker Pittlik]], [[CCC]], October 22, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=30797 Protector 1.3.2 released] by [[Graham Banks]], [[CCC]], November 26, 2009
==2010 ...==
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=50836 Protector] by [[Olivier Deville]], [[Computer Chess Forums|Winboard Forum]], March 04, 2010
* [http://www.talkchess.com/forum/viewtopic.php?t=47037 Protector 1.5 is coming!] by [[Jesús Muñoz]], [[CCC]], January 29, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=50583 Unofficial Protector 1.6] by [[Jose Maria Velasco|Jose Mº Velasco]], [[CCC]], December 21, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=53772 Protector 1.7.0 is released...] by [[Dr.Wael Deeb]], [[CCC]], September 21, 2014
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=56432 Protector 1.8.0 ?!] by [[Frank Quisinsky]], [[CCC]], May 20, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=56506 Protector 1.8.0 officially released] by [[Graham Banks]], [[CCC]], May 27, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=58343 Protector 1.9 Available for the Mac] by [[Michael Byrne|Michael B]], [[CCC]], November 24, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=58786 Re-release Protector 1.9 for the Mac] by [[Michael Byrne|Michael B]], [[CCC]], January 02, 2016
=External Links=
==Chess Engine==
* [http://sourceforge.net/projects/protector/ Protector | Free software downloads] at [https://en.wikipedia.org/wiki/SourceForge SourceForge]
* [https://www.game-ai-forum.org/icga-tournaments/program.php?id=803 Protector's ICGA Tournaments]
* [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)
* [http://www.computerchess.org.uk/ccrl/4040/cgi/compare_engines.cgi?family=Protector&print=Rating+list&print=Results+table&print=LOS+table&print=Ponder+hit+table&print=Eval+difference+table&print=Comopp+gamenum+table&print=Overlap+table&print=Score+with+common+opponents Protector] in [[CCRL|CCRL 40/40]]
==Misc==
* [http://en.wiktionary.org/wiki/protector protector - Wiktionary]
* [https://en.wikipedia.org/wiki/Protector Protector (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Protector_(DC_Comics) Protector (DC Comics) from Wikipedia]
* [https://en.wikipedia.org/wiki/Protector_(Marvel_Comics) Protector (Marvel Comics) from Wikipedia]
* [https://en.wikipedia.org/wiki/Protectors_(comics) Protectors (comics) from Wikipedia]
* [https://en.wikipedia.org/wiki/Protector_%28novel%29 Protector (novel) from Wikipedia]
* [https://en.wikipedia.org/wiki/Protector_(title) Protector (title) from Wikipedia]
* [https://en.wikipedia.org/wiki/Pak_Protector Pak Protector from Wikipedia]
* [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]]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:GPL]]
[[Category:UCI]]
[[Category:Comics]]
[[Category:Fiction]]
[[Category:Metaphysics]]
