Rubuta ci gaba don wannan sakin layi - A cikin 1994, a Hengelo Dennis de Vreugt ya lashe gasar zakarun matasa ta Netherlands a cikin rukunin shekaru U16. A cikin 1998, ya lashe Gasar Zakarun Turai ta Matasa a cikin rukunin shekaru U18, amma a shekara mai zuwa Dennis de Vreugt ya zama na farko a Gasar Zakarun Turai ta Matasa a cikin rukunin shekaru U20. A shekara ta 2000, a Istanbul ya kasance cikin tawagar 'yan wasan Holland a gasar Olympics ta Chess ta 34
a matsayin na biyu reservist, amma ba su taka wani jam'iyyar. A shekara ta 2002, a Hoogeveen gasar wasan chess ta duniya Dennis de Vreugt ya raba matsayi na biyu a bayan mai nasara Evgeny Alekseev. A cikin 2003, a Santo Domingo tare da Bartosz Soćko, Vadim Milov, Alexander Moiseenko da Liviu-Dieter Nisipeanu sun ɗauki matsayi na farko a gasar zakarun duniya.