Your starting coordinates: N 33° 01.036 W 117° 07.727

The cache is at the following coordinates: N 33° 01.[X] W 117° 07.[Y]

First, find a checkmate in each of the 2 chess boards.

You will not need the letter of the checkmate of each board.

Then solve for X and Y by solving the following math problems:

X = 2 * (Chess Board 1) + start
Y = start - (Chess Board 2) * (Chess Board 2) 

Stay tuned for a new chess cache!

Chess Board 1:

You are playing black

Chess Board 2:

You are playing white