page_title: May 1963
section_title: May 20, 1963 (Monday)
hierarchical_section_title: May 1963 / May 20, 1963 (Monday)
caption_attribution_description: English: Tigran Petrosian - World Chess Champion
context_page_description: The following events occurred in May 1963:
context_section_description: The World Chess Championship was won by Tigran Petrosian, who defeated world champion Mikhail Botvinnik, ​12 ¹⁄₂ to ​9 ¹⁄₂, to win the match after 22 games.  The two men, both Soviet citizens, had begun play on May 23 in Moscow.  Under the rules, Petrosian's five wins (worth one point each) and 15 draws (​¹⁄₂ point each) brought him to ​12 ¹⁄₂ points first to win the series.
  African-American civil rights activist Medgar Evers went on the air on the WLBT-TV News in Jackson, Mississippi, to deliver an editorial in favor of integration and civil rights.  WLBT allowed the unprecedented use of its airtime after pressure from the Federal Communications Commission to permit a response to segregationists.  Evers would be murdered at his home three weeks later, on June 12.
  The South African Police Cross for Bravery was instituted.
  The Dutch Wonderland Family Amusement Park was opened near Lancaster, Pennsylvania, by potato broker Earl Clark.
caption: Petrosian
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