Chessboard(day)

Disclaimer: Please take it easy on me in the ratings.  This is the first page I have done by myself AND it's still under construction!!
In chessboard levels, Dr. Edgar George Zomboss has built a gigantic chessboard on your lawn, disguising his identity as "George Aesob Zgors, MD", head of the "Thanotology Building Club". The chessboard changes many aspects of gameplay.

Basic aspects of gameplay
The board is 8 x 8 squares. Because of the warping effects of the chessboard, no sun falls from the sky, but you start with 150 sun as well as 25 "neuro", which replaces sun as an energy source for the chessboard plants.

You start with a king sunflower where the white king chesspiece would be. The plants and zombies encountered in the game all resemble chess pieces. Neuro sensors on the chessboard will destroy non-chessboard plants unless they have a neuro pad under them.