This is a disgrace to the best puzzle games ever <| sep |> The C major scale will be great for the other chords . If you ' re not feeling too comfortable with that , go practice come back and read the rest later . If you ' re feeling confident and want to try something crazy , keep reading ! We ' re talking about 4 chords , C , F , D , G . We need to use F # for the D , but we can use C major for all the rest . Here ' s why ChordC Major Scale , with chord notes highlighted C MajorC D E F G A B F MajorC D E F G A B G MajorC D E F G A B The C major scale works over all 3 of those chords because it has the notes for the chord . But you can play any scale that has the notes C , E , and G over the C chord . And you can play any scale that has the notes F , A , and C over the F chord . And you can play any scale that has the notes G , B , and D over the G chord . In fact , the G major scale is GABCDEF #. so you could , if you wanted to , solo in ' G Major ' over the C , D , and G chords , and just switch to the F natural over the F chord .