Ruders trained as an organist, and deliberate orchestration by owning Ib Nørholm. He has written inside a wide kind of styles, from either the Vivaldi pastiche of his first violin concerto (1981) to the modernism of Manhattan Abstraction (1982). Ruders is probably a virtually all-performed dwelling Danish composer.

More works include a opera Tycho (1986), two symphonies, three string quartets and two piano sonatas. Ruders has too written many crucial pieces for the American guitarist and promoter of new music David Starobin: Psalmodies (1989) & Paganini Variations for guitar & orchestra (1999-2000), & Psalmodies Suite (1990), Etude & Ricercare (1994) & Chaconne (1996) for solo guitar. Ruders has likewise composed the Concerto within Pieces (1995), which occurs as placed of variations on the "Witches' Chorus" from either Purcell's opera Dido and Aeneas.