Strategies for Solving Fill-A-Pix Puzzles

Basic Strategy

Step 1: Fill all cells that are explicitly forced black

During the first moves, this includes filling all cells around a 9, all cells around a 6 on a side, and all cells around a 4 in the corner. For later moves, this includes any cell that is forced black because of the clue(s) surrounding it.

This

becomes this

Step 2: Look for new cells that are forced white

Based on the moves made in Step 1, some clues may be completed, so their empty touching cells are forced white.

This

becomes this

Step 3: Repeat Steps 1 & 2 until board is complete or no cells are forced a color

If no cells are forced to be a specific color, use one of the case rules. If chosen strategically, the case rule can allow you to continue using Steps 1 & 2.