Here is a chess variant that focuses mainly on creating/balancing new chess mechanics for fairy pieces. If your into that feel free to join our discord. We're discussing and testing our ideas and compete in so-called "Royal MChess Matches".
Document where I explain the variant:
https://docs.google.com/document/d/1j_NgHGGbUf_fiY1YQaB_koYyDbfeBKAVFg8nocXKYk8/edit?usp=drive_link
Table of Contents with all of the Champions(fairy pieces):
https://drive.google.com/drive/folders/1VXzHOmbXIdK4S6e8V6mrswbSps4ZwwVB?usp=drive_link