Difference between revisions of "Glaurung"

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* [http://www.talkchess.com/forum/viewtopic.php?t=14864 Glaurung GUI for Mac OS X (and possibly Linux)] by [[Tord Romstad]], [[CCC]], July 03, 2007 » [[Mac OS]]
 
* [http://www.talkchess.com/forum/viewtopic.php?t=14864 Glaurung GUI for Mac OS X (and possibly Linux)] by [[Tord Romstad]], [[CCC]], July 03, 2007 » [[Mac OS]]
 
* [http://www.talkchess.com/forum/viewtopic.php?t=14926 Glaurung: Lodz report and other news] by [[Tord Romstad]], [[CCC]], July 08, 2007» [[IOPCCC 2007]]
 
* [http://www.talkchess.com/forum/viewtopic.php?t=14926 Glaurung: Lodz report and other news] by [[Tord Romstad]], [[CCC]], July 08, 2007» [[IOPCCC 2007]]
* [http://www.talkchess.com/forum/viewtopic.php?t=15051 Glaurung Lodz 2007 (unofficial Windows distribution))] by [[Denis Mendoza|Denis P. Mendoza]], [[CCC]], July 12, 2007
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* [http://www.talkchess.com/forum/viewtopic.php?t=15051 Glaurung Lodz 2007 (unofficial Windows distribution)] by [[Denis Mendoza|Denis P. Mendoza]], [[CCC]], July 12, 2007
 
* [http://www.talkchess.com/forum/viewtopic.php?t=15396 Going crazy over Glaurung...] by [[Alessandro Scotti]], [[CCC]], July 28, 2007
 
* [http://www.talkchess.com/forum/viewtopic.php?t=15396 Going crazy over Glaurung...] by [[Alessandro Scotti]], [[CCC]], July 28, 2007
 
* [http://www.talkchess.com/forum/viewtopic.php?t=17984 Macintosh Glaurung users: Please help] by [[Tord Romstad]], [[CCC]], November 23, 2007 » [[Macintosh]]
 
* [http://www.talkchess.com/forum/viewtopic.php?t=17984 Macintosh Glaurung users: Please help] by [[Tord Romstad]], [[CCC]], November 23, 2007 » [[Macintosh]]

Revision as of 12:17, 14 June 2021

Home * Engines * Glaurung

Glaurung,
an UCI-compatible open source chess engine developed by Tord Romstad under the GPL 3. Glaurung is the forerunner of Stockfish by Marco Costalba, Joona Kiiski and Tord Romstad. First released in fall 2004, Glaurung is written in C, later versions completely in C++. It is portable and able to run on Windows, Linux, Mac OS X and mobile platforms.

Tournament Play

Chess960 compliant, Glaurung played two Livingston Chess960 Computer World Championships, in 2005 where it became third, and the in 2006. It won two times the International Open Polish Computer Chess Championships, in 2007 [3] and 2008, and further played the ICT 2007, and the CCT8, CCT10, and CCT11 online tournaments.

Description

Board Representation

Glaurung versions prior to 2.0 applied 16x16 Vector Attacks [4] [5], combining the property of the 10x12 board with its surrounding ranks and files, which ensure a knight can not jump off the board, with the property that a square difference uniquely maps a vector in the Chebyshev vector space of a chessboard. With the advent of Magic Bitboards, Glaurung 2 was a complete rewrite [6] utilizing bitboards as primary board representation.

Search

Glaurung is a PVS searcher [7], using advanced selectivity, and was beside Fruit the program which made LMR popular [8] . Since early 2006 Glaurung 1.x supports SMP search.

Evaluation

Glaurung's evaluation is tellingly summarized by Tord's evaluation philosophy, covering orthogonality, continuity, sense of progress and good worst case behavior [9]. Glaurung applies a tapered evaluation to make a smooth transition between the game phases.

Gaurung GUI

In 2007, Tord released an own UCI compliant GUI for Mac OS X, written in Objective-C using the GNUstep [10] implementation of the Cocoa Widget toolkit [11], later ported for the iPhone.

Play Magnus

In February 2014, a modified and tuned version of Glaurung became the chess engine of Play Magnus [12], a chess application for iPhone and iPod Touch by Play Magnus AS, an Oslo, Norway-based company founded by Magnus Carlsen [13], who became World Chess Champion in November 2013.

See also

Forum Posts

2004

2005

2006

2007

2008

2009

2010 ...

External Links

Chess Engine

Misc

References

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