 A piano score (or piano reduction) is a more or less literal transcription for piano of a piece intended for many performing parts, especially orchestral works; this can include purely instrumental sections within large vocal works (see "vocal score" immediately below).Such arrangements are made for either piano solo (two hands) or piano duet (one or two pianos, four hands).Extra small staves are sometimes added at certain points in piano scores for two hands to make the presentation more complete, though it is usually impractical or impossible to include them while playing.