Included in this guide is the following;

• Chord Construction (extensive);
• Chord Substitution;
• Chord Inversions;
• Piano Chord Charts in keyboard view showing just about every chord that you will ever need including 7ths, 9ths, augmented, diminished etc. and how to play an effective 13th chord with just four notes;
• Printable Download.

Note that all of this information plus an enormous amount more is also included in my paperback books or printable eBooks:

 Learn How to Play Electronic Keyboard or Piano In a week!
and
Learn How to Play Piano / Keyboard By Ear
Without Reading Music (in keyboard view only)

But if you are just looking for a comprehensive chord guide then it’s all here!