Info: I only played the combat chess mode, because it was the only thing I was looking forward to because the idea (although it's not completely original, mortal kombat already used it) it's unusual and that mortal kombat sucked.
This mode should be for the Chess loving community, but they will hate you for this.
1st It's easy to use a knight or a tower and just smash the opponent's king at any time
2nd the tactic factor of chess goes completely off when what matters is how fast you can spam on the mouse button
3rd the tutorial should explain all the types of "soldiers" not just one, infactm appart from "Q to use the special power" the whole tutorial is pretty close to meaningless.
4th you are supposed to have at least 75% chance to win when attacking (to make it more chess likely) instead you have that amount of chance everytime you use a knight, whether you are attacking, defending, fighting the king or a pawn).
You could (maybe) make the King a Boss-like and enhance the power of EVERY piece when attacking a bit more.
I would love to see this mode work, and, for what I played, I believe you can do it.