A relatively late starter, Grivas was taught how to play at a chess club when he was 13 years old. He was later trained by IM Dr.
Nikolai Minev (1981–1982), FM Michalis Kaloskambis (1984–1986), GM
Efim Geller (1987–1988) and IM Nikolai Andrianov (1990–1996). He took part in a FIDE training camp in Moscow in 1984. Grivas has played in Greece for the following clubs: Kallithea Chess Club (1979–1994), OAA “Iraklion” (1995–1998), Kavala Chess Club (1999), AO “Kydon” Khania (2000–2005) and A.E.K. (2006-). From 1982 until 1999 he represented Greece 186 times (12 in the National Junior Team and 174 in the National Men's Team), having participated in eight
Olympiads (1984, 1986, 1988, 1990, 1992, 1994, 1996, 1998), three
European Team Chess Championships (1989, 1992, 1997), and twelve Balkaniads (1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1992, 1993, 1994). His greatest success was winning the Silver Individual Medal (on 3rd board) at the
33rd Chess Olympiad in 1998. Other important successes were the Gold Individual Medal (on the 3rd board) at the European Team Championship in 1989, 4th place at the
World Junior Chess Championship in 1985, 1st place at the 1987 Munich international tournament (320 participants), 11th individual place (on the 4th board) at the
32nd Chess Olympiad in 1996, qualification of his club (OAA “Iraklion”) to Europe's best 16 clubs in 1997 (European Club Cup) He scored the following at international tournaments: 3rd in
Paris 1982, 1st in
Cap d'Agde 1983, 2nd in
Karditsa 1984, 3rd in
Bucharest 1984, 2nd in
Strasbourg 1985, 2nd in
Munich 1986, 3rd in
Xanthi 1991, 2nd in
Gausdal 1993, 3rd in
Reykjavík 1994, 2nd in
Limassol 1997, 1st in Hellexpo-Sportexpo 2001. His handles on the
Internet Chess Club are "E-Grivas" and "Gref". ==Author==