I claim the ornamental design for a surface pattern for geometric web game board, as shown & described.
FIG. 1 is a top plan view of the surface pattern for a game board, showing
my new design, the broken line showing of the boundary is for illustrative
purposes only, and forms no part of the claimed design;
FIG. 2 is an enlarged view of the top left quadrant;
FIG. 3 is an enlarged view of the bottom left quadrant;
FIG. 4 is an enlarged view of the top right quadrant; and,
FIG. 5 is an enlarged view of the bottom right quadrant.