This is a concept, that must be balanced and further thought of.

In the most basic level, this is a chess game that uses three different boards: the common one, 8×8, a slightly minor, 5×5, and the 3×3. Until now, these are the rules I thought of:

• Each players receives two boards, one for the 5×5 and one for 3×3. They must be put at the side of the 8×8 board, in a way that both players boards are facing each other.
• When you move, while in the 5×5 or 3×3 boards, your position, when you return to the 8×8 will move in a higher scale: in the 5×5, your movement in the 8×8 is two times effective, so if you would move one house in the 5×5, you’ll move two in the 8×8. In the 3×3, you go to the extremes: if you move a single house in the 3×3, you’ll move, in the 8×8, you’ll go in that direction until you face something.
• If a movement you make goes beyond the board, this movement stops in its limit.
• Making a jump – going through boards – can only be made in a empty space.
• When you do a jump, you can’t do a movement.
• Each plane supports only one piece.
• If two players have pieces on the same plane, these two pieces can’t move in that plane, they must go to another one.
• If the players begin to stale the game, only changing the planes in this stalemat, after some time, to be defined, the game’ll end, and both of them will lose.
• A piece in 5×5 can only capture a rook in the 8×8, when making the jump. Otherwise, it’s stuck there.
• If you are in 3×3, and want to go to 8×8, you must go through 5×5: however, if 5×5 is occupied, it must move first to 8×8, then the piece in 3×3 can go to it.
• A rook can only “level up” if it went until the end of the board in the 8×8 plane.

For now, I think that’s it: I still want to develop it further, but there’s the need to think more on how to balance it all.