What’s the point of Solo Chess?

From the Chess.com FAQ:
"What is Solo Chess? How do I Play?
Solo Chess is a single player game that uses chess pieces, but does not follow the rules of chess like tactics puzzles do! It’s a different kind of game you can play with yourself using only knowledge of how the chess pieces move!"
The full article may be found here: https://support.chess.com/article/289-what-is-solo-chess-how-do-i-play