All corrections
Wikipedia October 22, 2026 at 12:38 PM

en.wikipedia.org/wiki/Rybka

1 correction found

1
Claim
In March 2009, Rybka won CCT11 with 7.5/9 and the 17th World Computer Chess Championship, held in Pamplona, Spain, with a score of 8/9.
Correction

This sentence misdates the 17th World Computer Chess Championship. The Pamplona championship was held in May 2009, not March 2009.

Full reasoning

The sentence incorrectly places the 17th World Computer Chess Championship in March 2009.

The official ICGA tournament page for the 17th World Computer Chess Championship – Pamplona 2009 lists round dates beginning on 2009-05-11 and ending on 2009-05-17, showing that the event took place in May 2009. A contemporaneous Chess.com report also states that the championship in Pamplona was held from 11–18 May.

So while Rybka may indeed have won CCT11 in March 2009, the sentence is wrong because it folds the Pamplona world championship into March as well. A correct version would separate the two events, e.g. that Rybka won CCT11 in March 2009, and later won the 17th World Computer Chess Championship in Pamplona in May 2009.

2 sources
Model: OPENAI_GPT_5 Prompt: v1.16.0