this is my next idea for a map. The idea was born while looking at porkenbean's godzilla. i like the idea of only being able to attack diagonally.
The idea of this would be a conquer map. you have to conquer the other player's king territory. the map would be set up like a chess board, and the bonuses would be a point bonus. every 3 points you have=one more troop
each pawn is worth one point.
each knight is worth 2 points
each bishop is worth 3 points
each rook is worth 4 points
each queen is worth 5 points
the king on each side would get an auto-deploy of 5 per turn. I don't have the map yet, and if anyone would simply like to make the map for fun, be my guest. just go ahead and post it here, this is just an idea in the making right now.
disclaimer: I do not know if there is already a chess board map in production. I am sorry if I copy your idea/map.