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Created page with "'''Home * Knowledge * Endgame Tablebases * Scorpio Bitbases''' FILE:Sco bode.jpg|border|right|thumb| [https://en.wikipedia.org/wiki/Scorpius Scorpio c..."
'''[[Main Page|Home]] * [[Knowledge]] * [[Endgame Tablebases]] * Scorpio Bitbases'''
[[FILE:Sco bode.jpg|border|right|thumb| [https://en.wikipedia.org/wiki/Scorpius Scorpio constellation] <ref>[https://en.wikipedia.org/wiki/Scorpius Scorpio constellation] 1782, from [[Mathematician#JEBode|Bode's]] revised and enlarged edition of [http://www.astrobril.nl/Fortin76.html Fortin's small star atlas] of [https://en.wikipedia.org/wiki/John_Flamsteed Flamsteed]</ref>]]
'''Scorpio Bitbases''',<br/>
are compact [[Endgame Bitbases|endgame bitbases]] created by [[Daniel Shawul]] with WDL information of up to 5-men, well suited to probe inside the [[Search|search]] as applied in Daniel's engine [[Scorpio]]. The 5-men WDL holds in 200 MB. In order to make progress in won egtb-positions near the [[Root|root]], various [[Evaluation|evaluation]] heuristics are necessary to modify winning [[Score|scores]] accordantly, considering [[Material|material]], ply-distance to the root, pawn closeness to promotion, [[Distance|distance]] of pieces to the opponent king, etc. <ref>[http://www.talkchess.com/forum/viewtopic.php?t=45009&start=4 Re: Search with bitbase] by [[Daniel Shawul]], [[CCC]], September 05, 2012</ref> .
=Open Source=
Scorpio Bitbases are open source, since October 2013 distributed under the [https://en.wikipedia.org/wiki/BSD_licenses BSD license] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=49572&start=7 Added liscense] by [[Daniel Shawul]], [[CCC]], October 04, 2013</ref> . Under [[Windows]], probing is encapsulated via a [https://en.wikipedia.org/wiki/Dynamic-link_library Dynamic-link library], which already provides a heuristic score instead of pure WDL information in order to make progress at the root without the need to probe huge DTC/DTM tablebases. As of January 2014, Daniel finished the '''6-men''' Scorpio Bitbases, available from [[Joshua Shriver|Joshua Shriver's]] [https://en.wikipedia.org/wiki/BitTorrent torrent] site <ref>[http://www.talkchess.com/forum/viewtopic.php?t=50894 Scorpio 6men EGBB Now available] by [[Joshua Shriver]], [[CCC]], January 14, 2014</ref> <ref>[https://github.com/dshawul/Scorpio dshawul/Scorpio · GitHub] includes Six men egbb code</ref>.
=See also=
* [[Endgame Bitbases|Bitbases]]
* [[Edwards' Tablebases]]
* [[Gaviota Tablebases]]
* [[Lomonosov Tablebases]]
* [[Nalimov Tablebases]]
* [[Scorpio]]
* [[Syzygy Bases]]
* [[Thompson's Databases]]
=Forum Posts=
==2005 ...==
* [https://www.stmintz.com/ccc/index.php?id=467250 Bitbases - yace, scorpio, gambitfruit] by [[Bernhard Bauer]], [[CCC]], December 06, 2005
* [http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=111335&t=12987 Re: Open Source bitbase program] by [[Daniel Shawul]], [[CCC]], April 12, 2007
* [http://www.talkchess.com/forum/viewtopic.php?t=19240 Scorpio BBs, licenses] by [[Zach Wegner]], [[CCC]], January 28, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=25211 Scorpio endgame bitbase specs?] by [[Ilari Pihlajisto]], [[CCC]], December 02, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=26936 New Scorpio bitbase files] by [[Dann Corbit]], [[CCC]], March 09, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=27339 Scorpio bitbases] by [[Matthias Gemuh]], [[CCC]], April 06, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=27642 Scorpio bitbases with linux. Any success?] by [[Joona Kiiski]], [[CCC]], April 29, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=29853 EGBB implementation] by [[Michael Hoffmann]], [[CCC]], September 24, 2009
==2010 ...==
* [http://www.open-chess.org/viewtopic.php?f=3&t=778 Some tablebase formats] by [[Mark Watkins|BB+]], [[Computer Chess Forums|OpenChess Forum]], November 25, 2010
* [http://www.talkchess.com/forum/viewtopic.php?t=43872 bitbase access by Scorpio versions... Dan Shawul?] by [[Ernest Bonnem]], [[CCC]], May 28, 2012
* [http://www.talkchess.com/forum/viewtopic.php?t=44553 pawn enumeration] by [[Daniel Shawul]], [[CCC]], July 24, 2012
* [http://www.talkchess.com/forum/viewtopic.php?t=45009&start=4 Re: Search with bitbase] by [[Daniel Shawul]], [[CCC]], September 05, 2012
* [http://www.talkchess.com/forum/viewtopic.php?t=45608 Houdini 3 with Scorpio Bitbases Question] by Milton Zucker, [[CCC]], October 16, 2012
==2013==
* [http://www.talkchess.com/forum/viewtopic.php?t=49572&start=1 Re: syzygy question (for Ronald)] by [[Daniel Shawul]], [[CCC]], October 04, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=49615 Scorpio Egbb Thread] by [[Joshua Shriver]], [[CCC]], October 07, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=49684 What happens using egbb] by [[Kai Laskos]], [[CCC]], October 12, 2013
* [http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=27837 Scorpio E.G.T.B.] by AxeFever, [[Computer Chess Forums|Rybka Forum]], October 22, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=49819 Syzygy / egbb discussion] by [[Daniel Shawul]], [[CCC]], October 23, 2013 » [[Syzygy Bases]]
* [http://www.talkchess.com/forum/viewtopic.php?t=50633 Scorpio bitbases question] by [[Harm Geert Muller]], [[CCC]], December 25, 2013
==2014 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=50894 Scorpio 6men EGBB Now available] by [[Joshua Shriver]], [[CCC]], January 14, 2014
* [http://www.open-chess.org/viewtopic.php?f=3&t=2568 50 Gb 6-men scorpio bitbases available] by [[Daniel Shawul|stackOVERFLOW]], [[Computer Chess Forums|OpenChess Forum]], January 14, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=51096 Stockfish goes EGBB] by [[Daniel Shawul]], [[CCC]], January 29, 2014 » [[Stockfish]]
* [http://www.talkchess.com/forum/viewtopic.php?t=51133 Scorpio & egbb issue (OSX)] by Max May, [[CCC]], February 01, 2014 » [[KBNK Endgame]]
* [http://www.talkchess.com/forum/viewtopic.php?t=51159 Performance of Syzygy and Scorpio] by [[Kai Laskos]], [[CCC]], February 04, 2014 » [[Syzygy Bases]]
* [http://www.talkchess.com/forum/viewtopic.php?t=66804 Problem position using Scorpio Egbbs] by [[Ross Boyd]], [[CCC]], March 11, 2018
=External Links=
* [https://sites.google.com/site/dshawul/ Scorpio Chess and Nebiyu Alien]
* [https://github.com/dshawul/egbbdll dshawul/egbbdll · GitHub]
* [https://github.com/dshawul/Scorpio dshawul/Scorpio · GitHub] includes Six men egbb code
* [http://oics.olympuschess.com/tracker/index.php OICS Chess and EGTB Tracker Statistics] by [[Joshua Shriver]] <ref>[https://en.wikipedia.org/wiki/BitTorrent BitTorrent from Wikipedia]</ref>
* [http://chess.cygnitec.com/tablebases/scorpio/ Index of /tablebases/scorpio] by [[Franklin Titus|kingliveson]]
=References=
<references />
'''[[Endgame Tablebases|Up one level]]'''
[[FILE:Sco bode.jpg|border|right|thumb| [https://en.wikipedia.org/wiki/Scorpius Scorpio constellation] <ref>[https://en.wikipedia.org/wiki/Scorpius Scorpio constellation] 1782, from [[Mathematician#JEBode|Bode's]] revised and enlarged edition of [http://www.astrobril.nl/Fortin76.html Fortin's small star atlas] of [https://en.wikipedia.org/wiki/John_Flamsteed Flamsteed]</ref>]]
'''Scorpio Bitbases''',<br/>
are compact [[Endgame Bitbases|endgame bitbases]] created by [[Daniel Shawul]] with WDL information of up to 5-men, well suited to probe inside the [[Search|search]] as applied in Daniel's engine [[Scorpio]]. The 5-men WDL holds in 200 MB. In order to make progress in won egtb-positions near the [[Root|root]], various [[Evaluation|evaluation]] heuristics are necessary to modify winning [[Score|scores]] accordantly, considering [[Material|material]], ply-distance to the root, pawn closeness to promotion, [[Distance|distance]] of pieces to the opponent king, etc. <ref>[http://www.talkchess.com/forum/viewtopic.php?t=45009&start=4 Re: Search with bitbase] by [[Daniel Shawul]], [[CCC]], September 05, 2012</ref> .
=Open Source=
Scorpio Bitbases are open source, since October 2013 distributed under the [https://en.wikipedia.org/wiki/BSD_licenses BSD license] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=49572&start=7 Added liscense] by [[Daniel Shawul]], [[CCC]], October 04, 2013</ref> . Under [[Windows]], probing is encapsulated via a [https://en.wikipedia.org/wiki/Dynamic-link_library Dynamic-link library], which already provides a heuristic score instead of pure WDL information in order to make progress at the root without the need to probe huge DTC/DTM tablebases. As of January 2014, Daniel finished the '''6-men''' Scorpio Bitbases, available from [[Joshua Shriver|Joshua Shriver's]] [https://en.wikipedia.org/wiki/BitTorrent torrent] site <ref>[http://www.talkchess.com/forum/viewtopic.php?t=50894 Scorpio 6men EGBB Now available] by [[Joshua Shriver]], [[CCC]], January 14, 2014</ref> <ref>[https://github.com/dshawul/Scorpio dshawul/Scorpio · GitHub] includes Six men egbb code</ref>.
=See also=
* [[Endgame Bitbases|Bitbases]]
* [[Edwards' Tablebases]]
* [[Gaviota Tablebases]]
* [[Lomonosov Tablebases]]
* [[Nalimov Tablebases]]
* [[Scorpio]]
* [[Syzygy Bases]]
* [[Thompson's Databases]]
=Forum Posts=
==2005 ...==
* [https://www.stmintz.com/ccc/index.php?id=467250 Bitbases - yace, scorpio, gambitfruit] by [[Bernhard Bauer]], [[CCC]], December 06, 2005
* [http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=111335&t=12987 Re: Open Source bitbase program] by [[Daniel Shawul]], [[CCC]], April 12, 2007
* [http://www.talkchess.com/forum/viewtopic.php?t=19240 Scorpio BBs, licenses] by [[Zach Wegner]], [[CCC]], January 28, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=25211 Scorpio endgame bitbase specs?] by [[Ilari Pihlajisto]], [[CCC]], December 02, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=26936 New Scorpio bitbase files] by [[Dann Corbit]], [[CCC]], March 09, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=27339 Scorpio bitbases] by [[Matthias Gemuh]], [[CCC]], April 06, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=27642 Scorpio bitbases with linux. Any success?] by [[Joona Kiiski]], [[CCC]], April 29, 2009
* [http://www.talkchess.com/forum/viewtopic.php?t=29853 EGBB implementation] by [[Michael Hoffmann]], [[CCC]], September 24, 2009
==2010 ...==
* [http://www.open-chess.org/viewtopic.php?f=3&t=778 Some tablebase formats] by [[Mark Watkins|BB+]], [[Computer Chess Forums|OpenChess Forum]], November 25, 2010
* [http://www.talkchess.com/forum/viewtopic.php?t=43872 bitbase access by Scorpio versions... Dan Shawul?] by [[Ernest Bonnem]], [[CCC]], May 28, 2012
* [http://www.talkchess.com/forum/viewtopic.php?t=44553 pawn enumeration] by [[Daniel Shawul]], [[CCC]], July 24, 2012
* [http://www.talkchess.com/forum/viewtopic.php?t=45009&start=4 Re: Search with bitbase] by [[Daniel Shawul]], [[CCC]], September 05, 2012
* [http://www.talkchess.com/forum/viewtopic.php?t=45608 Houdini 3 with Scorpio Bitbases Question] by Milton Zucker, [[CCC]], October 16, 2012
==2013==
* [http://www.talkchess.com/forum/viewtopic.php?t=49572&start=1 Re: syzygy question (for Ronald)] by [[Daniel Shawul]], [[CCC]], October 04, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=49615 Scorpio Egbb Thread] by [[Joshua Shriver]], [[CCC]], October 07, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=49684 What happens using egbb] by [[Kai Laskos]], [[CCC]], October 12, 2013
* [http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=27837 Scorpio E.G.T.B.] by AxeFever, [[Computer Chess Forums|Rybka Forum]], October 22, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=49819 Syzygy / egbb discussion] by [[Daniel Shawul]], [[CCC]], October 23, 2013 » [[Syzygy Bases]]
* [http://www.talkchess.com/forum/viewtopic.php?t=50633 Scorpio bitbases question] by [[Harm Geert Muller]], [[CCC]], December 25, 2013
==2014 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=50894 Scorpio 6men EGBB Now available] by [[Joshua Shriver]], [[CCC]], January 14, 2014
* [http://www.open-chess.org/viewtopic.php?f=3&t=2568 50 Gb 6-men scorpio bitbases available] by [[Daniel Shawul|stackOVERFLOW]], [[Computer Chess Forums|OpenChess Forum]], January 14, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=51096 Stockfish goes EGBB] by [[Daniel Shawul]], [[CCC]], January 29, 2014 » [[Stockfish]]
* [http://www.talkchess.com/forum/viewtopic.php?t=51133 Scorpio & egbb issue (OSX)] by Max May, [[CCC]], February 01, 2014 » [[KBNK Endgame]]
* [http://www.talkchess.com/forum/viewtopic.php?t=51159 Performance of Syzygy and Scorpio] by [[Kai Laskos]], [[CCC]], February 04, 2014 » [[Syzygy Bases]]
* [http://www.talkchess.com/forum/viewtopic.php?t=66804 Problem position using Scorpio Egbbs] by [[Ross Boyd]], [[CCC]], March 11, 2018
=External Links=
* [https://sites.google.com/site/dshawul/ Scorpio Chess and Nebiyu Alien]
* [https://github.com/dshawul/egbbdll dshawul/egbbdll · GitHub]
* [https://github.com/dshawul/Scorpio dshawul/Scorpio · GitHub] includes Six men egbb code
* [http://oics.olympuschess.com/tracker/index.php OICS Chess and EGTB Tracker Statistics] by [[Joshua Shriver]] <ref>[https://en.wikipedia.org/wiki/BitTorrent BitTorrent from Wikipedia]</ref>
* [http://chess.cygnitec.com/tablebases/scorpio/ Index of /tablebases/scorpio] by [[Franklin Titus|kingliveson]]
=References=
<references />
'''[[Endgame Tablebases|Up one level]]'''
