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'''[[Main Page|Home]] * [[Engines]] * Beowulf'''
[[FILE:Beowulf and the dragon.jpg|border|right|thumb| Beowulf fighting the [[:Category:Dragon|dragon]] <ref>A 1908 depiction of Beowulf fighting the dragon by [http://commons.wikimedia.org/wiki/Category:J._R._Skelton J. R. Skelton], Illustration in the children's book ''[http://www.mainlesson.com/display.php?author=marshall&book=beowulf&story=_contents Stories of Beowulf]'' ([https://en.wikipedia.org/wiki/Henrietta_Elizabeth_Marshall H. E. Marshall]), published in [https://en.wikipedia.org/wiki/New_York_City New York] in 1908 by [https://en.wikipedia.org/wiki/E._P._Dutton E. P. Dutton & Company], [https://en.wikipedia.org/wiki/Beowulf Beowulf from Wikipedia], [https://en.wikipedia.org/wiki/The_Dragon_%28Beowulf%29 The Dragon (Beowulf) from Wikipedia]</ref> ]]
'''Beowulf''',<br/>
a [[Chess Engine Communication Protocol]] compatible [[:Category:Open Source|open source engine]], the game-playing brains behind the [[ChessBrain]] project, a distributed computing project similar to [https://en.wikipedia.org/wiki/SETI@home SETI@home], that aims to harness the collective calculating power of individual computers over the internet to play a game of chess <ref>[http://www.chessbrain.net/ ChessBrain]</ref> . [[Colin Frayn]] is head of the project and primary Beowulf author, supported by [[Dann Corbit]], [[Ron Murawski]], [[Carlos Justiniano]] et al.. The version history ends with version 2.3, February 13, 2004, version 2.4 from August 21, 2010 is the latest released version with several bug fixes <ref>[http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=367856&t=35859 Re: Beowulf v2.4a chess engine] by [[Tony Mokonen]], [[CCC]], August 25, 2010</ref> . Beowulf is published under [[Free Software Foundation#GPL|GNU General Public Licence V2]].
=Features=
<ref>[http://www.frayn.net/beowulf/version.html Beowulf version history]</ref>
* [[Rotated Bitboards|Rotated Bitboard]] [[Move Generation|Move Generator]]
* Advanced Static Analysis Function
* [[Static Exchange Evaluation|Static Exchange Evaluator]] for [[Quiescence Search|Quiescence]] [[Pruning]]
* [[Quiescence Search]] [[Delta Pruning|Delta Cuts]]
* [[Null Move Pruning#AdaptiveNullMovePruning|Adaptive Depth Null move]] with [[Null Move Pruning#ZugzwangVerification|Verification Search]]
* [[Razoring|Adaptive Razoring]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=18395 Beowulf 2.4 Windows 64-bit build available] by [[Jim Ablett]], [[CCC]], December 15, 2007</ref>
* [[Hash Table|Innovative Design of Hashtables]]
* [[Internal Iterative Deepening]]
* [[Aspiration Windows|Aspiration Window Search]]
* [[History Heuristic|History]] and [[Killer Heuristic|Killer Move Heuristics]]
* [[Extensions|Numerous Search Extensions]]
* [[XBoard]]/[[WinBoard]] Support
* [[Opening Book|Opening Book Support]]
* [[Endgame Tablebases|Endgame Tablebase Support]] ([[Nalimov Tablebases|Nalimov]])
* [[Matt Taylor|Matt Taylor's]] [[BitScan#MattTaylorsFoldingtrick|Folded BitScan]] (board.c)
* [[Playing Strength|Variable Skill Levels]]
* [[Test-Positions#TestSuites|Test Suite Support]]
* [[Pseudorandom Number Generator|ISAAC64 Pseudorandom Number Generator]] by [[Bob Jenkins]], 1996, <ref>[http://burtleburtle.net/bob/rand/isaacafa.html ISAAC, a fast cryptographic random number generator]</ref> modifications by [[Ron Murawski]], 2001
=Forum Posts=
==2000 ...==
* [https://www.stmintz.com/ccc/index.php?id=173418 On Beowulf - long post] by [[Vincent Diepeveen]], [[CCC]], April 04, 2001
* [https://www.stmintz.com/ccc/index.php?id=176264 Beowulf v1.5 Has Been Released] by [[Colin Frayn]], [[CCC]], June 21, 2001
* [https://www.stmintz.com/ccc/index.php?id=186505 Beowulf 1.6d] by [[Dann Corbit]], [[CCC]], August 30, 2001
* [https://www.stmintz.com/ccc/index.php?id=192793 Beowulf v1.7 Released] by [[Colin Frayn]], [[CCC]], October 11, 2001
* [https://www.stmintz.com/ccc/index.php?id=201043 Beowulf v1.8 Released] by [[Colin Frayn]], [[CCC]], December 08, 2001
* [https://www.stmintz.com/ccc/index.php?id=212142 Beowulf v1.9 Released] by [[Colin Frayn]], [[CCC]], February 06, 2002
* [https://www.stmintz.com/ccc/index.php?id=221417 Beowulf v2.0 Release!] by [[Colin Frayn]], [[CCC]], October 06, 2002
* [https://www.stmintz.com/ccc/index.php?id=236641 Beowulf hot spots shown pictorially] by [[Dann Corbit]], [[CCC]], June 20, 2002
* [https://www.stmintz.com/ccc/index.php?id=256688 Beowulf v2.1] by [[Colin Frayn]], [[CCC]], October 06, 2002
* [https://www.stmintz.com/ccc/index.php?id=270921 New Beowulf Finally *officially) Released] by [[Colin Frayn]], [[CCC]], December 16, 2002
==20005 ...==
* [https://www.stmintz.com/ccc/index.php?id=434394 Beowulf has Moved!] by [[Colin Frayn]], [[CCC]], June 30, 2005
* [https://www.stmintz.com/ccc/index.php?id=448350 Beowulf Fixed (I hope)] by [[Colin Frayn]], [[CCC]], September 07, 2005
* [http://www.talkchess.com/forum/viewtopic.php?t=18395 Beowulf 2.4 Windows 64-bit build available] by [[Jim Ablett]], [[CCC]], December 15, 2007
* [http://www.talkchess.com/forum/viewtopic.php?t=23203 Beowulf 2.4 Windows-executable version] by [[Norbert Raimund Leisner]], [[CCC]], August 23, 2008
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=35859 Beowulf v2.4a chess engine] by [[Norbert Raimund Leisner]], [[CCC]], August 22, 2010
* [http://www.talkchess.com/forum/viewtopic.php?t=47057 TrappyBeowulf - A Beowulf mod to use [Trappy Minimax]] by [[Jim Ablett]], [[CCC]], January 30, 2013 <ref>[https://github.com/probabilityZero/TrappyBeowulf probabilityZero/TrappyBeowulf · GitHub] by [[Mike Vollmer]]</ref>
=External Links=
==Chess Engine==
* [http://www.frayn.net/beowulf/ Beowulf Computer Chess Engine]
* [http://www.frayn.net/beowulf/version.html Beowulf version history]
* [http://www.frayn.net/beowulf/theory.html Computer Chess Programming Theory]
* [http://www.computerchess.org.uk/ccrl/4040/cgi/engine_details.cgi?print=Details&each_game=1&eng=Beowulf%202.4a%2064-bit#Beowulf_2_4a_64-bit Beowulf 2.4a 64-bit] in [[CCRL|CCRL 40/40]]
* [https://github.com/probabilityZero/TrappyBeowulf probabilityZero/TrappyBeowulf · GitHub] by [[Mike Vollmer]]
==Misc==
* [https://en.wikipedia.org/wiki/Beowulf_%28disambiguation%29 Beowulf (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Beowulf Beowulf from Wikipedia]
* [https://en.wikipedia.org/wiki/Beowulf_%28hero%29 Beowulf (hero) from Wikipedia]
* [https://en.wikipedia.org/wiki/Beowulf_cluster Beowulf cluster from Wikipedia]
* [https://en.wikipedia.org/wiki/List_of_Beowulf_characters List of Beowulf characters from Wikipedia]
* [https://en.wikipedia.org/wiki/The_dragon_(Beowulf) The Dragon (Beowulf) from Wikipedia]
* [https://en.wikipedia.org/wiki/Beowulf:_The_Legend Beowulf: The Legend from Wikipedia]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:WinBoard]]
[[Category:XBoard]]
[[Category:Open Source]]
[[Category:GPL]]
[[Category:Legend]]
[[Category:Dragon]]
[[FILE:Beowulf and the dragon.jpg|border|right|thumb| Beowulf fighting the [[:Category:Dragon|dragon]] <ref>A 1908 depiction of Beowulf fighting the dragon by [http://commons.wikimedia.org/wiki/Category:J._R._Skelton J. R. Skelton], Illustration in the children's book ''[http://www.mainlesson.com/display.php?author=marshall&book=beowulf&story=_contents Stories of Beowulf]'' ([https://en.wikipedia.org/wiki/Henrietta_Elizabeth_Marshall H. E. Marshall]), published in [https://en.wikipedia.org/wiki/New_York_City New York] in 1908 by [https://en.wikipedia.org/wiki/E._P._Dutton E. P. Dutton & Company], [https://en.wikipedia.org/wiki/Beowulf Beowulf from Wikipedia], [https://en.wikipedia.org/wiki/The_Dragon_%28Beowulf%29 The Dragon (Beowulf) from Wikipedia]</ref> ]]
'''Beowulf''',<br/>
a [[Chess Engine Communication Protocol]] compatible [[:Category:Open Source|open source engine]], the game-playing brains behind the [[ChessBrain]] project, a distributed computing project similar to [https://en.wikipedia.org/wiki/SETI@home SETI@home], that aims to harness the collective calculating power of individual computers over the internet to play a game of chess <ref>[http://www.chessbrain.net/ ChessBrain]</ref> . [[Colin Frayn]] is head of the project and primary Beowulf author, supported by [[Dann Corbit]], [[Ron Murawski]], [[Carlos Justiniano]] et al.. The version history ends with version 2.3, February 13, 2004, version 2.4 from August 21, 2010 is the latest released version with several bug fixes <ref>[http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=367856&t=35859 Re: Beowulf v2.4a chess engine] by [[Tony Mokonen]], [[CCC]], August 25, 2010</ref> . Beowulf is published under [[Free Software Foundation#GPL|GNU General Public Licence V2]].
=Features=
<ref>[http://www.frayn.net/beowulf/version.html Beowulf version history]</ref>
* [[Rotated Bitboards|Rotated Bitboard]] [[Move Generation|Move Generator]]
* Advanced Static Analysis Function
* [[Static Exchange Evaluation|Static Exchange Evaluator]] for [[Quiescence Search|Quiescence]] [[Pruning]]
* [[Quiescence Search]] [[Delta Pruning|Delta Cuts]]
* [[Null Move Pruning#AdaptiveNullMovePruning|Adaptive Depth Null move]] with [[Null Move Pruning#ZugzwangVerification|Verification Search]]
* [[Razoring|Adaptive Razoring]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=18395 Beowulf 2.4 Windows 64-bit build available] by [[Jim Ablett]], [[CCC]], December 15, 2007</ref>
* [[Hash Table|Innovative Design of Hashtables]]
* [[Internal Iterative Deepening]]
* [[Aspiration Windows|Aspiration Window Search]]
* [[History Heuristic|History]] and [[Killer Heuristic|Killer Move Heuristics]]
* [[Extensions|Numerous Search Extensions]]
* [[XBoard]]/[[WinBoard]] Support
* [[Opening Book|Opening Book Support]]
* [[Endgame Tablebases|Endgame Tablebase Support]] ([[Nalimov Tablebases|Nalimov]])
* [[Matt Taylor|Matt Taylor's]] [[BitScan#MattTaylorsFoldingtrick|Folded BitScan]] (board.c)
* [[Playing Strength|Variable Skill Levels]]
* [[Test-Positions#TestSuites|Test Suite Support]]
* [[Pseudorandom Number Generator|ISAAC64 Pseudorandom Number Generator]] by [[Bob Jenkins]], 1996, <ref>[http://burtleburtle.net/bob/rand/isaacafa.html ISAAC, a fast cryptographic random number generator]</ref> modifications by [[Ron Murawski]], 2001
=Forum Posts=
==2000 ...==
* [https://www.stmintz.com/ccc/index.php?id=173418 On Beowulf - long post] by [[Vincent Diepeveen]], [[CCC]], April 04, 2001
* [https://www.stmintz.com/ccc/index.php?id=176264 Beowulf v1.5 Has Been Released] by [[Colin Frayn]], [[CCC]], June 21, 2001
* [https://www.stmintz.com/ccc/index.php?id=186505 Beowulf 1.6d] by [[Dann Corbit]], [[CCC]], August 30, 2001
* [https://www.stmintz.com/ccc/index.php?id=192793 Beowulf v1.7 Released] by [[Colin Frayn]], [[CCC]], October 11, 2001
* [https://www.stmintz.com/ccc/index.php?id=201043 Beowulf v1.8 Released] by [[Colin Frayn]], [[CCC]], December 08, 2001
* [https://www.stmintz.com/ccc/index.php?id=212142 Beowulf v1.9 Released] by [[Colin Frayn]], [[CCC]], February 06, 2002
* [https://www.stmintz.com/ccc/index.php?id=221417 Beowulf v2.0 Release!] by [[Colin Frayn]], [[CCC]], October 06, 2002
* [https://www.stmintz.com/ccc/index.php?id=236641 Beowulf hot spots shown pictorially] by [[Dann Corbit]], [[CCC]], June 20, 2002
* [https://www.stmintz.com/ccc/index.php?id=256688 Beowulf v2.1] by [[Colin Frayn]], [[CCC]], October 06, 2002
* [https://www.stmintz.com/ccc/index.php?id=270921 New Beowulf Finally *officially) Released] by [[Colin Frayn]], [[CCC]], December 16, 2002
==20005 ...==
* [https://www.stmintz.com/ccc/index.php?id=434394 Beowulf has Moved!] by [[Colin Frayn]], [[CCC]], June 30, 2005
* [https://www.stmintz.com/ccc/index.php?id=448350 Beowulf Fixed (I hope)] by [[Colin Frayn]], [[CCC]], September 07, 2005
* [http://www.talkchess.com/forum/viewtopic.php?t=18395 Beowulf 2.4 Windows 64-bit build available] by [[Jim Ablett]], [[CCC]], December 15, 2007
* [http://www.talkchess.com/forum/viewtopic.php?t=23203 Beowulf 2.4 Windows-executable version] by [[Norbert Raimund Leisner]], [[CCC]], August 23, 2008
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=35859 Beowulf v2.4a chess engine] by [[Norbert Raimund Leisner]], [[CCC]], August 22, 2010
* [http://www.talkchess.com/forum/viewtopic.php?t=47057 TrappyBeowulf - A Beowulf mod to use [Trappy Minimax]] by [[Jim Ablett]], [[CCC]], January 30, 2013 <ref>[https://github.com/probabilityZero/TrappyBeowulf probabilityZero/TrappyBeowulf · GitHub] by [[Mike Vollmer]]</ref>
=External Links=
==Chess Engine==
* [http://www.frayn.net/beowulf/ Beowulf Computer Chess Engine]
* [http://www.frayn.net/beowulf/version.html Beowulf version history]
* [http://www.frayn.net/beowulf/theory.html Computer Chess Programming Theory]
* [http://www.computerchess.org.uk/ccrl/4040/cgi/engine_details.cgi?print=Details&each_game=1&eng=Beowulf%202.4a%2064-bit#Beowulf_2_4a_64-bit Beowulf 2.4a 64-bit] in [[CCRL|CCRL 40/40]]
* [https://github.com/probabilityZero/TrappyBeowulf probabilityZero/TrappyBeowulf · GitHub] by [[Mike Vollmer]]
==Misc==
* [https://en.wikipedia.org/wiki/Beowulf_%28disambiguation%29 Beowulf (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Beowulf Beowulf from Wikipedia]
* [https://en.wikipedia.org/wiki/Beowulf_%28hero%29 Beowulf (hero) from Wikipedia]
* [https://en.wikipedia.org/wiki/Beowulf_cluster Beowulf cluster from Wikipedia]
* [https://en.wikipedia.org/wiki/List_of_Beowulf_characters List of Beowulf characters from Wikipedia]
* [https://en.wikipedia.org/wiki/The_dragon_(Beowulf) The Dragon (Beowulf) from Wikipedia]
* [https://en.wikipedia.org/wiki/Beowulf:_The_Legend Beowulf: The Legend from Wikipedia]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:WinBoard]]
[[Category:XBoard]]
[[Category:Open Source]]
[[Category:GPL]]
[[Category:Legend]]
[[Category:Dragon]]
