Rybka verliest al zijn wereldtitels door plagiaat
De bekendste schaakengine en programmeur ter wereld, Rybka en zijn maker Rajlich, zijn door de International Computer Games Association (ICGA) bestraft voor het plagiëren van de engines Crafty en Fruit. Rybka wordt daardoor niet alleen gediskwalificeerd voor deelname aan het wereldkampioenschap, maar verliest de vier wereldtitels die het eerder behaalde. Bovendien is Vasik Rajlich levenslang verbannen om nog deel te nemen aan toernooien van de ICGA.
Het verdict kwam er na een uitvoerig onderzoek naar plagiaat door een speciaal daarvoor opgerichte commissie. Alle bewijsstukken zijn online gepubliceerd door Chessvibes.com…
ICGA legt bom onder wereld der schaakengines
Plagiaat is een hot topic dezer dagen. Universiteiten en Hogescholen klagen steen en been over studenten die, steeds meer blijkbaar, hun toevlucht nemen tot het kopiëren van andermans werk zonder correcte bronvermelding. Ook in middelbare scholen, de muziekindustrie en de computerwereld is plagiaat schering en inslag.
Het nieuws dat Chessvibes vandaag bekend maakte, is dus op zich niet zo verrassend, maar zorgt toch voor een grote schok in de schaakwereld. De sterkste (of sinds kort op één na sterkste) schaakengine ter wereld zou zijn mosterd gehaald hebben bij de minder bekende engines Crafty en Fruit. Na een uitgebreid onderzoek van het speciaal opgerichte ICGA Clone and Derivative Investigation Panel blijkt het plagiaat van die aard te zijn om Rybka uit te sluiten van deelname aan het wereldkampioenschap. Bovendien verliest Rybka zijn eerdere titels en prijzengeld.
De ICGA heeft al zijn bewijsstukken openbaar gemaakt. Ze zijn ter download beschikbaar op Chessvibes, waar je ook meer informatie over het voorval kan vinden.
ICGA-voorzitter David Levy maakte het nieuws gisteren bekend in onderstaande brief:
“Rybka Disqualified and Banned from World Computer Chess Championships
The International Computer Games Association (ICGA) has been conducting an investigation into allegations that, in the chess program Rybka, the programmer Vasik Rajlich plagiarized two other programs: Crafty and Fruit. The ICGA has considered and evaluated the evidence presented to the investigation panel and the report prepared by the panel’s Secretariat. (The report and evidence files are attached.) We would like to thank those members of the panel who contributed to this investigation and the Secretariat for the enormous amount of conscientious work they have put in to this matter.
By a unanimous 5-0 decision of executive members of the ICGA we find ourselves in agreement with the verdict of the Secretariat’s report. We are convinced that the evidence against Vasik Rajlich is both overwhelming in its volume and beyond reasonable question in its nature. Vasik Rajlich is guilty of plagiarizing the programs Crafty and Fruit, and has violated the ICGA’s tournament rules with respect to the World Computer Chess Championships in the years 2006, 2007, 2008, 2009 and 2010. Specifically, Vasik Rajlich, on all five occasions, violated Tournament Rule 2 which requires that:
Each program must be the original work of the entering developers. Programming teams whose code is derived from or including game-playing code written by others must name all other authors, or the source of such code, in their submission details. Programs which are discovered to be close derivatives of others (e.g., by playing nearly all moves the same), may be declared invalid by the Tournament Director after seeking expert advice. For this purpose a listing of all game-related code running on the system must be available on demand to the Tournament Director.
By claiming other programmers’ work as his own, and failing to comply with the abovementioned rule, Vasik Rajlich has unfairly been awarded one shared 2nd-3rd place (in 2006) and four World Computer Chess Championship titles (in 2007, 2008, 2009 and 2010). Furthermore, it seems to the ICGA that Vasik Rajlich clearly knew that he was in the wrong in doing so, since he has repeatedly denied plagiarizing the work of other programmers.
The ICGA regards Vasik Rajlich’s violation of the abovementioned rule as the most serious offence that a chess programmer and ICGA member can commit with respect to his peers and to the ICGA. During the course of the investigation and upon presentation of the Secretariat’s report Vasik Rajlich did not offer, despite repeated invitations from the ICGA to do so, any kind of defence to the allegations, or to the evidence, or to the Secretariat’s report, other than to claim in an e-mail to myself on May 13th 2011 that:
Rybka has does not “include game-playing code written by others”, aside from standard exceptions which wouldn’t count as ‘game-playing’.
The vague phrase “derived from game-playing code written by others” also does not in my view apply to Rybka.
The ICGA is of the view that such a serious offence deserves to be met with correspondingly serious sanctions against the perpetrator. In deciding on appropriate sanctions the ICGA has borne in mind the approach of the International Olympic Committee for dealing with the most serious cases of the violations of its rules.
The ICGA has therefore decided as follows:
Vasik Rajlich is hereby disqualified from the World Computer Chess Championships (WCCC) of 2006, 2007, 2008, 2009 and 2010. The 2nd-3rd place awarded to the program called “Rajlich” in the 2006 WCCC is hereby annulled, sole 2nd place is awarded to the program Shredder, and 3rd place in that event is awarded to the program Zappa.
The 1st places and World Computer Chess Champion titles awarded to the program Rybka in the 2007, 2008, 2009 and 2010 WCCCs are hereby annulled, and all the other programs that competed in those events are moved up in the final tournament standings by one place. Thus the revised tournament standings and titles for those events will now be as follows.
1st Zappa (World Champion)
1st Hiarcs (World Champion)
3rd Cluster Toga
=1st Junior (Joint World Champion)
=1st Shredder (Joint World Champion)
=1st Deep Sjeng (Joint World Champion)
=1st Rondo (Joint World Champion)
=1st Thinker (Joint World Champion)
In due course those programmers whose programs have been elevated to World Champion (or joint World Champion) status will receive from the ICGA replicas of the Shannon trophy for the appropriate years.
The plaques on the Shannon trophy that currently bear the name Rybka (for the years 2007-2010) will be removed from the trophy and new plaques will be engraved with the names of the revised winners of the title. Similarly, the titles of World Computer Speed (Blitz) Chess Champion that were awarded to Rybka in 2009 and 2010 are hereby annulled. The revised winners of the speed chess title for those years are therefore:
2010 Jonny and Shredder (joint champions)
Vasik Rajlich is banned for life from competing in the World Computer Chess Championship or any other event organized by or sanctioned by the ICGA.
The ICGA demands that Vasik Rajlich return to the ICGA the four replicas of the Shannon Trophy presented at the World Computer Chess Championships in 2007, 2008, 2009 and 2010, and to return to the ICGA all prize money awarded for Rybka’s performances in those events.
David Levy [President – ICGA]
June 28th 2011″