Nikolas Theodorou was born in Athens, Greece and completed his high school education at the 6th Gymnasium of Glyfada. He developed a keen interest in chess at a young age. He is a true chess enthusiast and he has dedicated his entire life to the game, studying it on a daily basis.
His other achievements include winning the Greek chess championship under 20 in 1990 and a gold medal at the Balkaniad under 20 in 1991. Today, in his country, Theodorou is recognized as a pioneer in popularizing and promoting chess on the internet. Despite his Grandmaster title, Theodorou views it as a personal achievement rather than a marker of professional success.