Ultimate Chess

Combination of two of my invented variant: Level Up Chess and Fast Chess. The rules are a combination of both with a few changes. 

All pieces except kings and pawns can be promoted to any pieces by spending exp. points. White starts with 4 exp. while Black start with 5 exp. Every time you captured enemy pieces, you gain exp. points. If you capture the following you will gain the following exp. points.

Captured Pawn gives 1 exp. points.

Captured Knight or Bishop gives 3 exp. points

Captured Rook gives 5 exp. points

Captured Archbishop gives 7 exp. points

Captured Chancellor or Queen gives 9 exp. points

Leveling up a piece is considered a move. You can only level up a piece by one rank higher on each chosen path. These path in order from lowest rank to highest are:

Knight to Archbishop or Chancellor

Bishop to Archbishop or Queen

Rook to Chancellor or Queen

In order to level up a piece. You need to spend exp. points by the equation below.

En = (Ph - P) x 2

En = Exp. Needed

Ph = Promoted piece value

P = Piece Value

For example, you want to promote Knight to Archbishop

En = (7 - 3) x 2

En = 8 exp. points.

There is additional mechanic on the game. This is called Bonus Move. Bonus Move is an additional move other than your normal move. You can use these after normal move. There are two types of Bonus Move. These are Immediate Capture and Execution.

Immediate Capture is a bonus Move if you attack a piece multiple times for at least 3 pieces. Any of the pieces that attack that piece can capture it.

Execute is a bonus Move if you attack a piece multiple times for at least 5 pieces. You can capture the attacked piece without moving your pieces.

You can do multiple bonus moves at a turn.

your coming up with the best varaints

It's still not complete though.

ok