A chess site I'm calling 'Chess Derivatives' with modified rules to reinforce best practice. I'm still tweaking the specifics but the basic pitch is this
Augmented Chess: Normal chess with conventional ELO ranking system but you get additional penalties & rewards based on common bad practices, and recovering from bad positions.
> The first person that breaks from the book line loses 10% of the start time (unless book was not an option / the line was exhausted)
> Missing a forced checkmate forces you to wait 5% of the start time before your next move
> Achieving any principled position good grants some time (Passed pawn, connected rooks, rook / queen / bishop battery, etc)
> Doing any principled bad position loses some time (Knight on the rim, blocked bishop, king past the first rank in early game or mid game
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Continued Position: Chess but you continue a position from a high-level chess championship. There are a couple value-adds here
> Provide lower level players with a way to start a middle or end game positions after a highly skilled player followed all the correct principles. My theory is this will reinforce why those principles exists, how they can benefit you, etc.
> Provide high level players a way to be forced into positions out of their comfort zone / their preferred styles
> Provide differently-skilled players to continue play from unique positions with the desired amount of odds. So a GM might play a 1000 ELO player but starting from a position with -9 evaluation, etc.
If you have any ideas, comments, or feedback LMK.