10 birthdays, 5 matches, tournaments and games and 7 deaths from chess history on April 12.

198541 years ago today
Shakhriyar Mamedyarov was born
Azerbaijani chess player
Card photo: TheBoburshokh, CC BY 4.0, via Wikimedia Commons
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Matches, tournaments and games
- 19371937 USSR Chess ChampionshipBegan · won by Grigory Levenfish
- 19691969 Dutch chess championshipEnded · won by Hans Ree
- 1998Danish Chess Championship 1998Ended · won by Curt Hansen
- 2003Danish Chess Championship 2003Began · won by Peter Heine Nielsen
- 2014Danish Chess Championship 2014Began · won by Allan Stig Rasmussen
Born on April 12
- 1880Gerard OskamDutch chess player
- 1906Johannes van den BoschDutch chess player
- 1933Anicetas UogelėLithuanian chess player
- 1959Edvīns ĶeņģisLatvian chess player
- 1973Joël LautierFrench chess player
- 1983Mariya SergeyevaKazakh chess grandmaster
- 1984Kamil MitońPolish chess player
- 1985Shakhriyar MamedyarovAzerbaijani chess player
- 1987Fərhad TahirovAzerbaijani chess player
- 1988Ioannis PapadopoulosGreek chess player
Died on April 12
- 1905Charles RankenBritish chess player
- 1924H. W. B. GiffordBritish chess player
- 1944Roberto GrauArgentine chess player
- 1970Alois WotawaAustrian chess composer
- 1971Erling MyhreNorwegian chess player
- 2013Robert ByrneAmerican chess player and writer
- 2022Arne ZwaigChess 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.