Chess is perfect.
This thread could be retitled: given a chance, how would you like to damage chess?
Hi @Ziryab !
There are already popular chess variants in any case.
And those variants don't seem to have weakened the main game - they might even have strengthened it.
The one I hope is eventually developed is 3d chess.
We have some good posts about 3d chess from lindabell4 and queenRhaenyraa.
I think 3d chess will eventually develop much further but maybe not this century.
You must say UNO when down to your last non-king piece. If you don't say UNO, your opponent can put 2 pawns on the board on their starting rank, however they like.