Dee ihe na-esote paragraf a - Na 1994, na Hengelo Dennis de Vreugt meriri Netherlands Youth Chess Championship na U16 afọ otu. N'afọ 1998, ọ meriri European Youth Chess Championship na afọ U18, mana n'afọ na-eso ya Dennis de Vreugt họọrọ nke mbụ na European Junior Chess Championship na afọ U20. N'afọ 2000, n'Istanbul, e tinyere ya n'òtù ndị Netherlands na 34th Chess Olympiad
dịka onye nchekwa nke abụọ, mana egwuri egwu ọ bụla. N'afọ 2002, na Hoogeveen International chess tournament Dennis de Vreugt keere ọnọdụ nke abụọ n'azụ onye mmeri Evgeny Alekseev. N'afọ 2003, na Santo Domingo, ya na Bartosz Soćko, Vadim Milov, Alexander Moiseenko na Liviu-Dieter Nisipeanu weghaara ebe mbụ na asọmpi egwuregwu mba ụwa.