Roos comes from a French chess family. His father
Michel Roos (1932–2002) won the
French Chess Championship in 1964, his mother Jacqueline Roos (died 2016) was an
International Correspondence Chess Grandmaster (2000), his sister
Céline (1953–2021) was a
Woman International Master (WIM), and his brothers Jean-Luc (born 1955) and
Daniël (born 1959) are
International Masters (IM). From 1975 to 1977, Roos represented France three times at the
World Junior Chess Championship and
European Junior Chess Championships. He took part in the individual
French Chess Championship finals many times and won three medals: gold (1977) and two bronze (1976, 1980). In 1978 in
Amsterdam he participated in World Chess Championship Zonal tournament. In 1999, he ranked second in the Open chess tournament in
Bischwiller. Roos played for France in the
Chess Olympiads: • In 1978, at fourth board in the
23rd Chess Olympiad in
Buenos Aires (+3, =0, -4), • In 1980, at fourth board in the
24th Chess Olympiad in
La Valletta (+1, =5, -2). He played for France in the
European Team Chess Championship preliminaries: • In 1977, at sixth board in the 6th European Team Chess Championship preliminaries (+1, =0, -3). Roos played for France in the World Youth U26 Team Chess Championship: • In 1983, at fourth board in the 4th World Youth U26 Team Chess Championship in
Chicago (+5, =0, -4). He played for France in the Men's Chess Mitropa Cup: • In 1977, at first board in the 2nd Chess Mitropa Cup in
Bad Kohlgrub (+1, =3, -1) and won team bronze medal. ==References==