The piano chords guide that we offer for free download over on the right hand side of the page is only a very basic and abridged document.
Our piano chord guide contains the 24 basic major and mimor chords. that is the major and minor verions of the chords for each of the twelve notes of the octave.
There are in reality hundreds of chords that you can play on the piano. Besides the major and minor chords there are also diminished, augmented, 7ths minor 7ths and major 7ths, suspended, 11ths, 13ths… and the list goes on.
Apart from having one chord for each of the 12 notes in the octave, each chord can be played in a variety of inversions with at least 3 different ways of playing each chord. If you add up all of the combinations you have literally hundreds of different possible piano chords to learn.