If you'll pardon me for borrowing your board (and pardon my horrific graphics skills) I like your chess game, and I think there's room for more than one chess map. What I was thinking of was more of a beginning-game setup, where all the pieces were still on the board.
Areas which did not have pieces on them would be divided into regions, and you would earn a bonus for controlling a region of the board with no chess pieces on it. There would be no bonus for controlling individual pieces. All chess pieces would start out as neutral armies (1 for pawn, 3 for bishop or knight, 5 for rook, 9 for queen and 40 for king.) Once you took over a piece, your armies on that square would be restricted to the attacking moves possible from that square. The object would be to take all pieces of a color except the king; or, just the king and queen together.
Armies on empty squares would attack up, down, and diagonally one square (like a king). Adjacent shaded regions could attack each other diagonally.
- Click image to enlarge.

- Click image to enlarge.
