G# is a minor second below A.; G is a major 2nd below A. The min 7th is down a major 2nd? Confusing, right? The note G is down 2 half-steps from A, but up 10 half-steps from A: Guitar chords and guitar tablature made easy. Chordie is a search engine for finding guitar chords and guitar tabs. In search of a piano chords chart? You will find various chord charts here. Learn how to build major, minor, diminished, diminished seventh, augmented, suspended fourth, seventh suspended fourth, dominant seventh, minor seventh, major seventh, minor sixth and major sixth piano chords. Home » Piano Chords » D7 Chord on Piano. Look at the image to see how to play D7 in the root position on piano. You should basically play the notes D (above middle C) F#, A and C with the 1st, 2nd 3rd and 5th fingers.