Rubuta ci gaba don wannan sakin layi - An haifi Onat a Istanbul a 1929 kuma ya koma Izmir a 1930 tare da danginsa. Ya fara wasan chess ne a makarantar sakandaren İzmir Atatürk, ya kammala karatunsa daga Faculty of Pharmacy na Jami'ar Istanbul. Onat, wanda ya sadu da manyan 'yan wasa yayin da yake dalibi a Istanbul, ya yi hutu daga wasan chess lokacin da ya koma Izmir. A matsayinsa na dan wasan chess, ya halarci gasar Olympics ta 17th, 18th, 25th, 26th da 27th Chess Olympiad
Ƙungiyar Ƙasar Turkiyya. Ya lashe gasar zakarun Turkiyya ta 1974, 1975 da 1982.