Gyokuseki

Gyokuseki (Gyokusekikonko Puresu) is a Japanese logic puzzle. Draw visible and invisible black and white circles in some cells.

Rules: Draw a white or black circle in some cells of the grid. Each row and column contains exactly one black circle and any number of white circles.
A number at the edge of the grid indicates how many circles you “see” when you “look” into the grid at the corresponding position, up to and including the black circle.