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Created page with "'''Home * Engines * Fortress''' FILE:Buhen3.jpg|border|right|thumb| Buhen fortress <ref>Artists impression of the battlements at [https://en.wikipedia.org..."
'''[[Main Page|Home]] * [[Engines]] * Fortress'''
[[FILE:Buhen3.jpg|border|right|thumb| Buhen fortress <ref>Artists impression of the battlements at [https://en.wikipedia.org/wiki/Buhen Buhen fortress] in [https://en.wikipedia.org/wiki/Ancient_Egypt Ancient Egypt] about 1800 BC, Source: [http://www.safran.be/products.php?cat=385 Franck Monnier] ('''2010'''). ''[http://www.safran.be/proddetail.php?prod=CEA11 Les forteresses égyptiennes. Du Prédynastique au Nouvel Empire, collection Connaissance de l'Égypte ancienne]''. Safran (éditions), Bruxelles, 978-2-87457-033-9, [https://en.wikipedia.org/wiki/Defensive_wall Defensive wall from Wikipedia]</ref> ]]
'''Fortress''',<br/>
a [[Chess Engine Communication Protocol]] compliant chess engine by [[Alessandro Damiani]], written in [[C]], first released in October 1998 <ref>[http://wbec-ridderkerk.nl/html/details1/Fortress.html Fortress] from [[WBEC|WBEC Ridderkerk]]</ref>. Fortress pioneered in [[Rotated Indices]], a deconcentrated version of [[Rotated Bitboards|rotated bitboards]]. Alessandro once mentioned improving a version of [[Günther Schrüfer|Schrüfer's]] "most selective" [[Quiescence Search|quiescence search]] <ref>[http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/375e65821715995f futility cut-offs] by [[Alessandro Damiani]], [[Computer Chess Forums|rgcc]], November 14, 1997</ref>, found in Schrüfer's Ph.D. thesis ''Minimax-Suchen'' <ref>[[Günther Schrüfer]] ('''1988'''). ''Minimax-Suchen : Kosten, Qualität und Algorithmen''. [https://en.wikipedia.org/wiki/Technical_University_of_Braunschweig TU Braunschweig] (German)</ref>.
=Technical Details=
<ref>based on [http://www.computer-chess.org/doku.php?id=computer_chess:wiki:download:engine_download_list Engine Download List] from [[Ron Murawski|Ron Murawski's]] [http://computer-chess.org/doku.php?id=home Computer-Chess Wiki], Fortress 1.62.zip / readme.doc</ref>
* [[Bitboards]] [[Rotated Indices]]
* [[Fail-Soft]] [[Alpha-Beta]]
* [[Iterative Deepening]]
* [[Aspiration Windows]]
* [[Null Move Pruning]]
* [[Extensions|Search Extensions]]
** [[Check Extensions]]
** [[Passed Pawn Extensions|Promotion Threats]]
** [[Mate Threat Extensions|Piece Threats]]
* [[Transposition Table]]
* [[Killer Heuristic]]
* [[History Heuristic]]
* [[Evaluation]] mostly [[Incremental Updates|calculated incrementally]]
=See also=
* [[Fortress]] (Chess term)
* [[Gk]]
* [[Rotated Indices]]
* [[Stonewall]]
* [[Ziggurat]]
=Forum Posts=
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/375e65821715995f futility cut-offs] by [[Alessandro Damiani]], [[Computer Chess Forums|rgcc]], November 14, 1997
* [https://www.stmintz.com/ccc/index.php?id=39509 New Version: FORTRESS V1.5, the new Morphy?] by [[Alessandro Damiani]], [[CCC]], January 15, 1999
* [https://www.stmintz.com/ccc/index.php?id=67954 Re: Home page for Fortress! ToDo: Opening book, ...] by [[Alessandro Damiani]], [[CCC]], September 09, 1999
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=18&t=30206&p=115019 Fortress 1.62 is available !] by [[Frank Quisinsky]], [[Computer Chess Forums|Winboard Forum]], May 22, 2000
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=18&t=37189&p=141153 Fortress 1.62 and Draw by 50 moves rule ?] by [[Brice Boissel]], [[Computer Chess Forums|Winboard Forum]], May 08, 2002
=External Links=
==Chess Engine==
* [http://www.computer-chess.org/doku.php?id=computer_chess:wiki:download:engine_download_list Engine Download List] from [[Ron Murawski|Ron Murawski's]] [http://computer-chess.org/doku.php?id=home Computer-Chess Wiki]
* [http://www.g-sei.org/fortress/ Fortress « G 6]
* [http://www.computerchess.org.uk/ccrl/404/cgi/engine_details.cgi?print=Details&each_game=1&eng=Fortress%201.62#Fortress_1_62 Fortress 1.62] in [[CCRL|CCRL 40/4]]
==Chess==
* [https://en.wikipedia.org/wiki/Fortress_%28chess%29 Fortress (chess) from Wikipedia]
* [https://en.wikipedia.org/wiki/Fortress_chess Fortress chess (Variant) from Wikipedia]
==Misc==
* [https://en.wikipedia.org/wiki/Fortress_%28programming_language%29 Fortress (programming language) - Wikipedia]
* [https://en.wikipedia.org/wiki/Fortification Fortification from Wikipedia]
* [https://en.wikipedia.org/wiki/Fort_%28disambiguation%29 Fort (disambiguation) from Wikipedia]
=References=
<references />
'''[[Engines|Up one level]]'''
[[Category:WinBoard]]
[[Category:Buildings]]
[[FILE:Buhen3.jpg|border|right|thumb| Buhen fortress <ref>Artists impression of the battlements at [https://en.wikipedia.org/wiki/Buhen Buhen fortress] in [https://en.wikipedia.org/wiki/Ancient_Egypt Ancient Egypt] about 1800 BC, Source: [http://www.safran.be/products.php?cat=385 Franck Monnier] ('''2010'''). ''[http://www.safran.be/proddetail.php?prod=CEA11 Les forteresses égyptiennes. Du Prédynastique au Nouvel Empire, collection Connaissance de l'Égypte ancienne]''. Safran (éditions), Bruxelles, 978-2-87457-033-9, [https://en.wikipedia.org/wiki/Defensive_wall Defensive wall from Wikipedia]</ref> ]]
'''Fortress''',<br/>
a [[Chess Engine Communication Protocol]] compliant chess engine by [[Alessandro Damiani]], written in [[C]], first released in October 1998 <ref>[http://wbec-ridderkerk.nl/html/details1/Fortress.html Fortress] from [[WBEC|WBEC Ridderkerk]]</ref>. Fortress pioneered in [[Rotated Indices]], a deconcentrated version of [[Rotated Bitboards|rotated bitboards]]. Alessandro once mentioned improving a version of [[Günther Schrüfer|Schrüfer's]] "most selective" [[Quiescence Search|quiescence search]] <ref>[http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/375e65821715995f futility cut-offs] by [[Alessandro Damiani]], [[Computer Chess Forums|rgcc]], November 14, 1997</ref>, found in Schrüfer's Ph.D. thesis ''Minimax-Suchen'' <ref>[[Günther Schrüfer]] ('''1988'''). ''Minimax-Suchen : Kosten, Qualität und Algorithmen''. [https://en.wikipedia.org/wiki/Technical_University_of_Braunschweig TU Braunschweig] (German)</ref>.
=Technical Details=
<ref>based on [http://www.computer-chess.org/doku.php?id=computer_chess:wiki:download:engine_download_list Engine Download List] from [[Ron Murawski|Ron Murawski's]] [http://computer-chess.org/doku.php?id=home Computer-Chess Wiki], Fortress 1.62.zip / readme.doc</ref>
* [[Bitboards]] [[Rotated Indices]]
* [[Fail-Soft]] [[Alpha-Beta]]
* [[Iterative Deepening]]
* [[Aspiration Windows]]
* [[Null Move Pruning]]
* [[Extensions|Search Extensions]]
** [[Check Extensions]]
** [[Passed Pawn Extensions|Promotion Threats]]
** [[Mate Threat Extensions|Piece Threats]]
* [[Transposition Table]]
* [[Killer Heuristic]]
* [[History Heuristic]]
* [[Evaluation]] mostly [[Incremental Updates|calculated incrementally]]
=See also=
* [[Fortress]] (Chess term)
* [[Gk]]
* [[Rotated Indices]]
* [[Stonewall]]
* [[Ziggurat]]
=Forum Posts=
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/375e65821715995f futility cut-offs] by [[Alessandro Damiani]], [[Computer Chess Forums|rgcc]], November 14, 1997
* [https://www.stmintz.com/ccc/index.php?id=39509 New Version: FORTRESS V1.5, the new Morphy?] by [[Alessandro Damiani]], [[CCC]], January 15, 1999
* [https://www.stmintz.com/ccc/index.php?id=67954 Re: Home page for Fortress! ToDo: Opening book, ...] by [[Alessandro Damiani]], [[CCC]], September 09, 1999
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=18&t=30206&p=115019 Fortress 1.62 is available !] by [[Frank Quisinsky]], [[Computer Chess Forums|Winboard Forum]], May 22, 2000
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=18&t=37189&p=141153 Fortress 1.62 and Draw by 50 moves rule ?] by [[Brice Boissel]], [[Computer Chess Forums|Winboard Forum]], May 08, 2002
=External Links=
==Chess Engine==
* [http://www.computer-chess.org/doku.php?id=computer_chess:wiki:download:engine_download_list Engine Download List] from [[Ron Murawski|Ron Murawski's]] [http://computer-chess.org/doku.php?id=home Computer-Chess Wiki]
* [http://www.g-sei.org/fortress/ Fortress « G 6]
* [http://www.computerchess.org.uk/ccrl/404/cgi/engine_details.cgi?print=Details&each_game=1&eng=Fortress%201.62#Fortress_1_62 Fortress 1.62] in [[CCRL|CCRL 40/4]]
==Chess==
* [https://en.wikipedia.org/wiki/Fortress_%28chess%29 Fortress (chess) from Wikipedia]
* [https://en.wikipedia.org/wiki/Fortress_chess Fortress chess (Variant) from Wikipedia]
==Misc==
* [https://en.wikipedia.org/wiki/Fortress_%28programming_language%29 Fortress (programming language) - Wikipedia]
* [https://en.wikipedia.org/wiki/Fortification Fortification from Wikipedia]
* [https://en.wikipedia.org/wiki/Fort_%28disambiguation%29 Fort (disambiguation) from Wikipedia]
=References=
<references />
'''[[Engines|Up one level]]'''
[[Category:WinBoard]]
[[Category:Buildings]]
