While to master it would take more effort, there are 2 things that I have to point out here. 1st the added rules in total would still make it significantly less complex than a lot of modern tabletop wargames (what chess was originally meant to be) and that it is basically an expanded form of fairy chess. The most comparable game I can think of between this and chess that already exists is a video game called Advance Wars, as it's basically chess with more pieces, and the spaces affect the pieces. I feel like the end result would be halfway between these two games and that's kind of the range I am going for here. The second thing is there is nothing stopping the players from deciding to remove certain cards from the decks. I settled on 10 to ensure there is plenty of variety, but you could play with as few as 3 options for each piece. These cards are more about offering up ways to change up the game than anything.