jesper søndergaard thybo repeatedly represented denmark at the european youth chess championships and world youth chess championships in different age groups, where won gold medal in 2017, at the european youth chess championship in the u18 age group. in 2016, he won the nordic youth chess championship. in 2017, in jūrmala jesper søndergaard thybo won tournament with international master norm. in 2017 he won third place in the danish chess championship. he two times played for denmark in world youth u16 chess olympiads (2012, 2014).