tag: Rybka scandal - Page 1

ICGA/Rybka controversy: Feedback

2/17/2012 – The recent interview with David Levy, President of the International Computer Games Association, has generated a lot of feedback from our readers – and continues to do so. We will publish a selection of this feedback next week. For now we bring you three messages from directly involved parties, including Levy himself, who has initiated an investigation against a second program.

ICGA/Rybka controversy: An interview with David Levy (2)

2/10/2012 – On Monday we published part one of a lengthy interview we had conducted, via sequential email exchanges, with the President of the International Computer Games Association David Levy. The ICGA had found star programmer Vasik Rajlich guilty of "plagiarism" in his early program versions and banned him for life. Here now is part two of the interview.

ICGA/Rybka controversy: An interview with David Levy (1)

2/6/2012 – He is a star chess programmer with an unbroken record of supremacy in computer chess during the past five years. In June 2011 the International Computer Games Association found Vasik Rajlich guilty of "plagiarism" in early program versions and banned him for life. We published a vigorous defence of Rajlich and a rebuttal by ICGA President David Levy, who promised us an indepth interview.

Feedback on the ICGA/Rybka disqualification scandal

1/13/2012 – It's a long read, but many of the letters we received in reaction to the defence of the Rybka program by Dr Søren Riis are quite passionate and well thought out in their content. We start with the summary of a long rebuttal of the Riis paper that was sent to us by the ICGA and circulated on the Internet – with links to the full version and ancillary documents. Take a deep breath.

A Gross Miscarriage of Justice in Computer Chess (part four)

1/5/2012 – As proof that Vas Rajlich had copied program code the ICGA presented pages and pages of Fruit and Rybka code side by side. But, according to Dr Søren Riis, what was labeled as Rybka code was actually fabricated to look like Fruit. He criticizes the ICGA's process failures and ruminates on the reasons behind the unprecedented vendetta launched against the star chess programmer.

A Gross Miscarriage of Justice in Computer Chess (part three)

1/4/2012 – A core accusation against Vas Rajlich is that Rybka and Fruit have very similar positional evaluations, and the use of floating point numbers in Rybka’s time management code had to be copied from Fruit. Søren Riis enumerates the ten substantive evaluation differences and shows how the second accusation boils down to a single misplaced keystroke with zero impact on Rybka's play.

A Gross Miscarriage of Justice in Computer Chess (part two)

1/3/2012 – In this part Dr Søren Riis of Queen Mary University in London shows how most programs (legally) profited from Fruit, and subsequently much more so from the (illegally) reverse engineered Rybka. Yet it is Vasik Rajlich who was investigated, found guilty of plagiarism, banned for life, stripped of his titles, and vilified in the international press – for a five-year-old alleged tournament rule violation. Ironic.

A Gross Miscarriage of Justice in Computer Chess (part one)

1/2/2012 – "Biggest Sporting Scandal since Ben Johnson" and "Czech Mate, Mr. Cheat" – these were headlines in newspapers around the world six months ago. The International Computer Games Association had disqualified star programmer Vasik Rajlich for plagiarism, retroactively stripped him of all titles, and banned him for life. Søren Riis, a computer scientist from London, has investigated the scandal.
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