This deck provides general music theory rules with a focus on constructing chords. The aim is to memorize the spelling of every triad in the 12 tone Western musical scale as well as memorizing the formulas for the standard extended chords.
| Front | D Minor Triad |
| Back | D - F - A |
| Front | Major Triad |
| Back | 1 – 3 – 5 |
| Front | Major Third (M3) |
| Back | 4 Semi-Tones |