Nikolas Theodorou

World rank: No. 78 (October 2026)
Rating: 2639 (+6 this month)
Peak rating: 2656 (November 2025)
Title: Grandmaster (2021)
Federation: Greece
Born: September 17, 2000, Athens, Greece (age 26)
FIDE ID: 4262875

A Greek grandmaster who studied physics, mathematics and biostatistics at Saint Louis University while playing for its chess team. He won individual silver at the 2022 Olympiad.

2025 was his breakthrough year: he won the UzChess Cup Challengers and the Biel Challengers, entered the world top 100, and at the Grand Swiss beat the reigning world champion, Gukesh Dommaraju.

Career highlights

Beat reigning world champion Gukesh at the 2025 Grand Swiss
Olympiad individual silver in 2022
Won the 2025 UzChess Cup Challengers and Biel Challengers
Peak rating 2656 (November 2025)

FIDE profile · Wikipedia
Profile last reviewed September 29, 2026. Ratings update monthly from FIDE.