hope u know all what this is, i will post minor relatives shortly well there is not such rules for this theory but this chords theory basically use in the pakistani indian and some english songs so if u got the first chord u can use this relatives to sort out the whole song so play and enjoy basic major CHORDS RELATIVES Formula :- Major:- 1 | 3 | 5 | 6 | 8 | 10 | 12 | 13 (1, 5, 8) Minor:- 1 | 3 | 4 | 6 | 8 | 9 | 11 | 13 (1, 4, 8) Relatives C# | F# | D# | G# | B | Fm | G#m | E | A#m D | G | E | A | C | F#m | Am | F | Bm D# | G# | F | A# | C# | Gm | A#m | F# | Cm E | A | F# | B | D | G#m | Bm | G | C#m F | A# | G | A | D# | Am | Cm | G# | Dm F# | B | G# | A# | E | A#m | C#m | A | D#m G | C | A | B | F | Bm | Dm | A# | Em G# | C# | A# | C | F# | Cm | D#m | B | Fm A | D | B | C# | G | C#m | Em | C | F#m A# | D# | C | D | G# | Dm | Fm | C# | Gm B | E | C# | D# | A | D#m | F#m | D | G#m C | F | D | E | A# | Em | Gm | D# | Am
well if ur song is starting with C and u dont know which chords are in the song then use the C chord relatives chords and sort out the whole song.....