Career
FIDE awarded him the IM title in 1983 and the General Motors title in 1990. From that moment, he regularly played for Estonia during Chess and European team championships. Early 1998 he reached his highest position on the FIDE ranking list: 2655.
He played his last tournament in 1999 in Nova Gorica reaching a shared second position.
He committed suicide by jumping out of the window of his house on the fifth floor. Despite his personal problems, he still held the 42nd place on the world ranking list at that time.
He was buried at Metsakalmistu cemetery in Tallinn, not too far away from the most famous Estonian chess player Paul Keres. 1989: Espoo, Tallinn (zonal tournament), Helsinki.
1990: Terrassa. 1991: Sydney, Helsinki.
1992: Seville. 1993: Vilnius, The Hague, Antwerp. 1994: New York Open (shared 1st with Jaan Ehlvest).
1995: Helsinki, Riga (zonal tournament).
1996: Saint St. Petersburg. 1997: Køge, Szeged (shared 1st), Hoogeveen (shared 1st). Oll played for Estonia four times in Chess In 1992, at second board at the 30th Olympiad in Manila (+7 –1 =6);
In 1994, at first board at the 31st Olympiad in Moscow (+3 –2 =8);
In 1996, at second board at the 32nd Olympiad in Yerevan (+2 –1 =9);
In 1998, at first board at the 33rd Olympiad in Elista (+1 –0 =7).