Sandbox feature

It would be great to have a sandbox feature listed as a variant along with the others. When you selected it, you'd be presented with three checkboxes:

• Enforce movement rules. When unchecked, it allows you to move pieces freely (even to squares occupied by your own pieces), and you could also move enemy pieces.

• Enforce check, checkmate and stalemate. When unchecked, you aren't forced to answer a check, and checkmate and stalemate don't end the game.

• Enable drops. When checked, captured pieces will go to a reserve, as in Crazyhouse, and players will be able to drop them back on the board.

For one, this would allow ChessWhiz to play many variants on his show that aren't possible now.

That would be a fun ""testing ground", obviously there would be reduced features (e.g. move lists would be difficult or impossible to generate if f.e. you try to play absorption chess and bishops start moving like knights, or any other illegal move in standard chess). Would be fun though.

I expected there to be more people interested in this feature. There are so many interesting chess variants out there that could be played like this without having them officially implemented. You could even play Arimaa!

https://en.wikipedia.org/wiki/Arimaa