14 birthdays, 3 matches, tournaments and games and 9 deaths from chess history on October 30.

197056 years ago today
Xie Jun was born
Women's World Chess Champion
Card photo: Andrzej Filipowicz, Public domain, via Wikimedia Commons
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Matches, tournaments and games
- 2004Women's Chess Olympiad 2004Ended
- 2022FIDE World Fischer Random Chess Championship 2022Ended
- 2025Chess World Cup 2025Began · won by Javokhir Sindarov
Born on October 30
- 1804Karl II, Duke of BrunswickDuke of Brunswick
- 1882Oldřich DurasCzech chess player
- 1884John DunlopNew Zealand chess player
- 1904Marie Jeanne FrigardFrench chess player
- 1917Giuseppe PrimaveraItalian chess player
- 1920Alexander CherepkovChess player
- 1939Zygmunt PiochPolish chess player
- 1957Ľubomír FtáčnikCzechoslovak chess player
- 1963Gilberto MilosBrazilian chess grandmaster
- 1968Jorge MiraSpanish physicist and television presenter
- 1970Xie JunWomen's World Chess Champion
- 1978Herminio Herráiz HidalgoSpanish chess player
- 1986Bart MichielsBelgian chess player
- 2000Jeffery XiongAmerican chess player
Died on October 30
- 1923Bonar LawPrime Minister of the United Kingdom from 1922 to 1923
- 1950Boris VerlinskySoviet chess player
- 1972Jerzy LewiPolish chess player
- 1989Karen GrigorianChess player
- 2003Aidyn GuseinovChess player
- 2010Ingi Randver JóhannssonIcelandic chess player
- 2010Yevhen BohdanovUkrainian chess composer and journalist
- 2012Emilis ŠlekysLithuanian chess player
- 2017Algimantas ButnoriusLithuanian chess player
Dates from Wikidata (CC0). Photos from Wikimedia Commons, credited on each card. Dates can differ between sources, especially before 1918 when Russia used the old calendar.