Between Pelléas et Mélisande and Riders to the Sea, which one has more acts?
Pelléas et Mélisande (opera) Pelléas et Mélisande ("Pelléas and Mélisande") is an opera in five acts with music by Claude Debussy. The French libretto was adapted from Maurice Maeterlinck's Symbolist play "Pelléas et Mélisande". It premiered at the Opéra-Comique in Paris on 30 April 1902 with Jean Périer as Pelléas and Mary Garden as Mélisande in a performance conducted by André Messager, who was instrumental in getting the Opéra-Comique to stage the work. The only opera Debussy ever completed, it is considered a landmark in 20th-century music.
Senza sangue Senza sangue (Without blood) an opera in one act by Péter Eötvös with a libretto by Mari Mezei. It is based on the second part of the novel of the same name by Alessandro Baricco and is intended to be performed jointly with Béla Bartók's one-act "Bluebeard's Castle". The concert première was given by the Cologne Philharmonic Orchestra on 1 May 2015. It was premièred in full on 15 May 2016 at the Festival d'Avignon. It is his tenth opera. Anne Sofie von Otter, who gave the New York première with the New York Philharmonic, said: "“The piece is not at all easy for the two singers... [It’s] hard to find the pitch; you have to work it into the voice, unless of course you happen to have perfect pitch, which I don’t."