The year 2008 marked the fortieth anniversary of Reunion, a performance in which games of chess determined the form and acoustical ambience of a musical event. The concert – held at the Ryerson Theatre in Toronto, Canada – began shortly after 8:30 on the evening of March 5, 1968, and concluded at approximately 1:00 a.m. the next morning. Principal players were John Cage, who conceived (but did not actually “compose”) the work; Marcel Duchamp and his wife Alexina (Teeny); and composers David Behrman, Gordon Mumma, David Tudor, and Lowell Cross. Except for a brief curtain call with Merce Cunningham and Dance Company in Buffalo, NY five days later (March 10, 1968), Duchamp made his last public stage appearance – in the role of chess master – in Reunion.
During the last few years of his life, John Cage wrote many pieces in the same general vein as Five3. They are often referred to as "the number pieces." This references the titles of the pieces, which are all simply the number of the performers. Superscripts are added as necessary to distinguish the individual pieces (this is the third quintet, for example).
These works are also called "the time-bracket pieces," a reference to the notation of the pieces.
John Cage (1912-1992) holds his own special place amidst this stylistic pluralism. Although Cage did not specifically write a trio for horn, violin, and piano, his work Music For (1984) can be easily fleshed out in this instrumental lineup. Music For is a bundle of 17 parts that can be randomly associated with one another. Each possible combination represents an entirely valid version of the piece – ranging from a solo performance to piano duet, string quartet, or ensemble with voice. The version for horn trio is called Music For Three, and this version also allows for several performance alternatives.