Ippolit

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Ippolit, an UCI compliant open source engine by pseudonymous authors. A former CPW page of Ippolit by one of its authors from May 2009, was preliminary deleted due to a claim by Rybka author Vasik Rajlich, CPW would support piracy sites and who implied Ippolit is a clone or derivative from Rybka 3, apparently due to disassembling and decompiling.

=Legal Status= The authors of Ippolit call themselves Comrades and keep pseudonymous. Head Comrade is Yakov Petrovich Golyadkin, Deputy Head Comrade Igor Igorovich Igoronov, Honorary Comrade Vladimir Ilyich Lenin , and further Roberto Pescatore, Yusuf Ralf Weisskopf, Ivan Skavinsky Skavar , and Decembrists.

Ippolit pages were initially hosted by Wikispaces.org. Ippolit and its successor RobboLito were discussed in Computer Chess Forums from mid October 2009, and it is no longer appropriate to ignore them further. The source code is open and distributed. Ippolit and RobboLito are apparently as strong or even stronger than Rybka 3 on a single processor. They are therefor likely to hurt interests of commercial chess program authors and companies as well as hobbyist computer chess programmers with all their original efforts over years, and finally the sportive aspects of computer chess, the competition.

The legal status of Ippolit and its successors, and despite the socialization of re-engineered knowledge from commercial engines should be matter of independent scientific research possibly under the aegis of the ICGA.

=Origin= In June 2010, Vasik Rajlich made following statement on Rybka and Ippolit, which was published by Sven Schüle in CCC : Ippolit is disassembled Rybka 3 with changes. The changes are considerable but not even close to enough to leave any doubt. Robbolito is an evolved Ippolit, with more changes and more cleanup. I haven't checked the other new engines yet.

The same day Zach Wegner published a technical summary by former anonymous author "BB+" alias Mark Watkins about Rybka and Ippolit, which demonstrates differences are substantial , and he nevertheless concluded he would find it wholly plausible that Ippolit is a "reverse-engineered Rybka with many changes" in the same forum thread. RobboLito's sentinel Milos Stanisavljevic is proponent of Ippolit's originality, despite his note it used ideas from reverse engineering Rybka 3.

=Derivatives=
 * Fire
 * Igorrit
 * IvanHoe
 * RobboLito

=Publications=
 * Mark Watkins (2010). A comparison of Rybka and IPPOLIT. pdf

=Forum Posts=

2009

 * New engine: Ippolit by Vladimir Medvedev, CCC, October 18, 2009
 * Hippo Lite, what's really going on? by Michael Sherwin, CCC, October 20, 2009
 * Official statement on [Deleted?] by Vasik Rajlich, Rybka Forum, October 21, 2009
 * And the Ippolit author is... by Alexander Schmidt, CCC, October 22, 2009
 * I'm in doubt if RobboLito is a clone by Volker Pittlik, CCC, October 24, 2009
 * My two cents on the whole ippolit thing by Dann Corbit, CCC, October 31, 2009
 * Thoughts... by Alexander Schmidt, CCC, November 12, 2009
 * Paradigm shifts by Gian-Carlo Pascutto, CCC, November 14, 2009

2010

 * ACCA stance on Ippo, Robbo and such by Charles Roberson, CCC, January 06, 2010 » ACCA
 * My recent correspondence with Vasik Rajlich by Sven Schüle, CCC, June 13, 2010
 * BB's Rybka/Ippolit comparison by Zach Wegner, OpenChess Forum, June 13, 2010
 * A Question for Our Sponsor..IPPO Links OK or Not? by Steve B, CCC, June 24, 2010
 * More on Rybka/IPPOLIT (with occasional reference to Fruit) by BB+ (Mark Watkins), OpenChess Forum, December 01, 2010

2011

 * ь code by kingliveson, OpenChess Forum, February 03, 2011
 * Why are the Ippo derivative stronger than Stockfish? by Larry Kaufman, CCC, 24 February, 2011
 * Re: Houdini, Fire, IvanHoe, (and Rybka?) are 'clones'...? by Jury Osipov, CCC, May 12, 2011
 * Back to R3/IPPOLIT(/R4?) by BB+ (Mark Watkins), OpenChess Forum, July 14, 2011
 * Re: WCCC 2011 - Junior is the 2011 World Champion by Milos Stanisavljevic, CCC, November 25, 2011
 * IPPOLIT by kingliveson, OpenChess Forum, December 12, 2011

2012
=External Links=
 * Unanswered question from Engine Origins forum by Eelco de Groot, CCC, September 01, 2012

IPPOLIT

 * IPPOLIT - home archived by the Wayback Machine, November 12, 2011
 * IPPOLIT from Wikipedia
 * Rybka - IPPOLIT controversy from Wikipedia
 * IPPOLIT from Wikipedia.de (German)
 * Ippolit/Robbolito/Igorrit/IvanHoe/Firebird - Interview with Victor Zakharov from Convekta, January 24, 2010, Arena Chess GUI, News-Ticker, Page 11, 191, MD

Hippolyte

 * Hippolyte (disambiguation) from Wikipedia
 * Hippolyta from Wikipedia
 * A Midsummer Night's Dream from Wikipedia
 * The Two Noble Kinsmen from Wikipedia
 * Hippolyta (DC Comics) from Wikipedia
 * Hippolyta (Marvel Comics) from Wikipedia
 * Hippolyte Rocks from Wikipedia

Misc

 * Anonymity from Wikipedia
 * Anonymous (group) from Wikipedia
 * Pseudonym from Wikipedia

=References= Up one Level