To solve you need to determine where the stars are in the grid. There is one star per row, column and colored region. Stars may not be adjacent, even diagonally.

Input tips

• Each time you click a cell, it will toggle through the values, NOT STAR, STAR and unknown (blank).
• You can right click to set value directly to a STAR.
• As a shortcut, if you drag your mouse over a set of undefined cells, it will set them all to NOT STAR.