The 26th Chess Olympiad (Greek: Η 26η Σκακιστική Ολυμπιάδα, I 26i Skakistikí Olympiáda), organized by FIDE and comprising an open and a women's tournament, as well as several other events designed to promote the game of chess, took place between November 18 and December 5, 1984, in Thessaloniki, Greece.
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The 42nd anniversary falls on November 18, 2026.