Scorpio+Bitbases

are compact endgame bitbases created by Daniel Shawul with WDL information of up to 5-men, well suited to probe inside the 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, various evaluation heuristics are necessary to modify winning scores accordantly, considering material, ply-distance to the root, pawn closeness to promotion, distance of pieces to the opponent king, etc..
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 * [[image:Sco_bode.jpg width="280" height="265" link="http://commons.wikimedia.org/wiki/File:Sco_bode.jpg"]] ||~  || **Scorpio Bitbases**,

Scorpio Bitbases are open source, since October 2013 distributed under the [|BSD license]. Under Windows, probing is encapsulated via a [|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's [|torrent] site. || toc =See also=
 * [|Scorpio constellation] ||~   ||^   ||
 * Bitbases
 * Edwards' Tablebases
 * Gaviota Tablebases
 * Lomonosov Tablebases
 * Nalimov Tablebases
 * Scorpio
 * Syzygy Bases
 * Thompson's Databases

=Forum Posts=

2005 ...

 * [|Bitbases - yace, scorpio, gambitfruit] by Bernhard Bauer, CCC, December 06, 2005
 * [|Re: Open Source bitbase program] by Daniel Shawul, CCC, April 12, 2007
 * [|Scorpio BBs, licenses] by Zach Wegner, CCC, January 28, 2008
 * [|Scorpio endgame bitbase specs?] by Ilari Pihlajisto, CCC, December 02, 2008
 * [|New Scorpio bitbase files] by Dann Corbit, CCC, March 09, 2009
 * [|Scorpio bitbases] by Matthias Gemuh, CCC, April 06, 2009
 * [|Scorpio bitbases with linux. Any success?] by Joona Kiiski, CCC, April 29, 2009
 * [|EGBB implementation] by Michael Hoffmann, CCC, September 24, 2009

2010 ...

 * [|Some tablebase formats] by BB+, OpenChess Forum, November 25, 2010
 * [|bitbase access by Scorpio versions... Dan Shawul?] by Ernest Bonnem, CCC, May 28, 2012
 * [|pawn enumeration] by Daniel Shawul, CCC, July 24, 2012
 * [|Re: Search with bitbase] by Daniel Shawul, CCC, September 05, 2012
 * [|Houdini 3 with Scorpio Bitbases Question] by Milton Zucker, CCC, October 16, 2012

2013

 * [|Re: syzygy question (for Ronald)] by Daniel Shawul, CCC, October 04, 2013
 * [|Scorpio Egbb Thread] by Joshua Shriver, CCC, October 07, 2013
 * [|What happens using egbb] by Kai Laskos, CCC, October 12, 2013
 * [| Scorpio E.G.T.B.] by AxeFever, Rybka Forum, October 22, 2013
 * [|Syzygy / egbb discussion] by Daniel Shawul, CCC, October 23, 2013 » Syzygy Bases
 * [|Scorpio bitbases question] by Harm Geert Muller, CCC, December 25, 2013

2014 ...

 * [|Scorpio 6men EGBB Now available] by Joshua Shriver, CCC, January 14, 2014
 * [|50 Gb 6-men scorpio bitbases available] by stackOVERFLOW, OpenChess Forum, January 14, 2014
 * [|Stockfish goes EGBB] by Daniel Shawul, CCC, January 29, 2014 » Stockfish
 * [|Scorpio & egbb issue (OSX)] by Max May, CCC, February 01, 2014 » KBNK Endgame
 * [|Performance of Syzygy and Scorpio] by Kai Laskos, CCC, February 04, 2014 » Syzygy Bases
 * [|Problem position using Scorpio Egbbs] by Ross Boyd, CCC, March 11, 2018

=External Links=
 * [|Scorpio Chess and Nebiyu Alien]
 * [|dshawul/egbbdll · GitHub]
 * [|dshawul/Scorpio · GitHub] includes Six men egbb code
 * [|OICS Chess and EGTB Tracker Statistics] by Joshua Shriver
 * [|Index of /tablebases/scorpio] by kingliveson

=References= =What links here?= include page="Scorpio Bitbases" component="backlinks" limit="40"
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